http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_epoch/validate/Makefile
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_epoch/validate/Makefile 
b/lib/ck/regressions/ck_epoch/validate/Makefile
new file mode 100644
index 0000000..73f8e5d
--- /dev/null
+++ b/lib/ck/regressions/ck_epoch/validate/Makefile
@@ -0,0 +1,26 @@
+.PHONY: check clean distribution
+
+OBJECTS=ck_stack ck_epoch_synchronize ck_epoch_poll
+HALF=`expr $(CORES) / 2`
+
+all: $(OBJECTS)
+
+check: all
+       ./ck_stack $(CORES) 1
+       ./ck_epoch_synchronize $(HALF) $(HALF) 1
+       ./ck_epoch_poll $(CORES) 1 1
+
+ck_epoch_synchronize: ck_epoch_synchronize.c ../../../include/ck_stack.h 
../../../include/ck_epoch.h ../../../src/ck_epoch.c
+       $(CC) $(CFLAGS) -o ck_epoch_synchronize ck_epoch_synchronize.c 
../../../src/ck_epoch.c
+
+ck_epoch_poll: ck_epoch_poll.c ../../../include/ck_stack.h 
../../../include/ck_epoch.h ../../../src/ck_epoch.c
+       $(CC) $(CFLAGS) -o ck_epoch_poll ck_epoch_poll.c ../../../src/ck_epoch.c
+
+ck_stack: ck_stack.c ../../../include/ck_stack.h ../../../include/ck_epoch.h 
../../../src/ck_epoch.c
+       $(CC) $(CFLAGS) -o ck_stack ck_stack.c ../../../src/ck_epoch.c
+
+clean:
+       rm -rf *~ *.o $(OBJECTS) *.dSYM *.exe
+
+include ../../../build/regressions.build
+CFLAGS+=$(PTHREAD_CFLAGS) -D_GNU_SOURCE

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_epoch/validate/ck_epoch_poll.c
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_epoch/validate/ck_epoch_poll.c 
b/lib/ck/regressions/ck_epoch/validate/ck_epoch_poll.c
new file mode 100644
index 0000000..86cdbb4
--- /dev/null
+++ b/lib/ck/regressions/ck_epoch/validate/ck_epoch_poll.c
@@ -0,0 +1,245 @@
+/*
+ * Copyright 2010-2014 Samy Al Bahra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <errno.h>
+#include <inttypes.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <unistd.h>
+#include <sys/time.h>
+
+#include <ck_backoff.h>
+#include <ck_cc.h>
+#include <ck_pr.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <string.h>
+#include <ck_epoch.h>
+#include <ck_stack.h>
+
+#include "../../common.h"
+
+static unsigned int n_rd;
+static unsigned int n_wr;
+static unsigned int n_threads;
+static unsigned int barrier;
+static unsigned int e_barrier;
+static unsigned int readers;
+static unsigned int writers;
+
+#ifndef PAIRS_S
+#define PAIRS_S 100000
+#endif
+
+#ifndef ITERATE_S
+#define ITERATE_S 20
+#endif
+
+struct node {
+       unsigned int value;
+       ck_stack_entry_t stack_entry;
+       ck_epoch_entry_t epoch_entry;
+};
+static ck_stack_t stack = CK_STACK_INITIALIZER;
+static ck_epoch_t stack_epoch;
+CK_STACK_CONTAINER(struct node, stack_entry, stack_container)
+CK_EPOCH_CONTAINER(struct node, epoch_entry, epoch_container)
+static struct affinity a;
+static const char animate[] = "-/|\\";
+
+static void
+destructor(ck_epoch_entry_t *p)
+{
+       struct node *e = epoch_container(p);
+
+       free(e);
+       return;
+}
+
+static void *
+read_thread(void *unused CK_CC_UNUSED)
+{
+       unsigned int j;
+       ck_epoch_record_t record CK_CC_CACHELINE;
+       ck_stack_entry_t *cursor;
+
+       /*
+        * This is redundant post-incremented in order to silence some
+        * irrelevant GCC warnings. It is volatile in order to prevent
+        * elimination.
+        */
+       volatile ck_stack_entry_t *n;
+
+       ck_epoch_register(&stack_epoch, &record);
+
+       if (aff_iterate(&a)) {
+               perror("ERROR: failed to affine thread");
+               exit(EXIT_FAILURE);
+       }
+
+       ck_pr_inc_uint(&barrier);
+       while (ck_pr_load_uint(&barrier) < n_threads);
+
+       while (CK_STACK_ISEMPTY(&stack) == true) {
+               if (ck_pr_load_uint(&readers) != 0)
+                       break;
+
+               ck_pr_stall();
+       }
+
+       j = 0;
+       for (;;) {
+               ck_epoch_begin(&stack_epoch, &record);
+               CK_STACK_FOREACH(&stack, cursor) {
+                       if (cursor == NULL)
+                               continue;
+
+                       n = CK_STACK_NEXT(cursor);
+
+                       /* Force n use. */
+                       j += ((uintptr_t)(void *)n & 0) + 1;
+               }
+               ck_epoch_end(&stack_epoch, &record);
+
+               if (j != 0 && ck_pr_load_uint(&readers) == 0)
+                       ck_pr_store_uint(&readers, 1);
+
+               if (CK_STACK_ISEMPTY(&stack) == true &&
+                   ck_pr_load_uint(&e_barrier) != 0)
+                       break;
+       }
+
+       ck_pr_inc_uint(&e_barrier);
+       while (ck_pr_load_uint(&e_barrier) < n_threads);
+
+       fprintf(stderr, "[R] Observed entries: %u\n", j);
+       return (NULL);
+}
+
+static void *
+write_thread(void *unused CK_CC_UNUSED)
+{
+       struct node **entry, *e;
+       unsigned int i, j, tid;
+       ck_epoch_record_t record;
+       ck_stack_entry_t *s;
+
+       ck_epoch_register(&stack_epoch, &record);
+
+       if (aff_iterate(&a)) {
+               perror("ERROR: failed to affine thread");
+               exit(EXIT_FAILURE);
+       }
+
+       tid = ck_pr_faa_uint(&writers, 1);
+       ck_pr_inc_uint(&barrier);
+       while (ck_pr_load_uint(&barrier) < n_threads);
+
+       entry = malloc(sizeof(struct node *) * PAIRS_S);
+       if (entry == NULL) {
+               ck_error("Failed allocation.\n");
+       }
+
+       for (j = 0; j < ITERATE_S; j++) {
+               for (i = 0; i < PAIRS_S; i++) {
+                       entry[i] = malloc(sizeof(struct node));
+                       if (entry == NULL) {
+                               ck_error("Failed individual allocation\n");
+                       }
+               }
+
+               for (i = 0; i < PAIRS_S; i++) {
+                       ck_stack_push_upmc(&stack, &entry[i]->stack_entry);
+               }
+
+               while (ck_pr_load_uint(&readers) == 0)
+                       ck_pr_stall();
+
+               if (tid == 0) {
+                       fprintf(stderr, "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b[W] 
%2.2f: %c",
+                           (double)j / ITERATE_S, animate[i % 
strlen(animate)]);
+               }
+
+               for (i = 0; i < PAIRS_S; i++) {
+                       ck_epoch_begin(&stack_epoch, &record);
+                       s = ck_stack_pop_upmc(&stack);
+                       e = stack_container(s);
+                       ck_epoch_end(&stack_epoch, &record);
+
+                       ck_epoch_call(&stack_epoch, &record, &e->epoch_entry, 
destructor);
+                       ck_epoch_poll(&stack_epoch, &record);
+               }
+       }
+
+       ck_epoch_barrier(&stack_epoch, &record);
+
+       if (tid == 0) {
+               fprintf(stderr, "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b[W] 
Peak: %u (%2.2f%%)\n    Reclamations: %lu\n\n",
+                       record.n_peak,
+                       (double)record.n_peak / ((double)PAIRS_S * ITERATE_S) * 
100,
+                       record.n_dispatch);
+       }
+
+       ck_pr_inc_uint(&e_barrier);
+       while (ck_pr_load_uint(&e_barrier) < n_threads);
+       return (NULL);
+}
+
+int
+main(int argc, char *argv[])
+{
+       unsigned int i;
+       pthread_t *threads;
+
+       if (argc != 4) {
+               ck_error("Usage: stack <#readers> <#writers> <affinity 
delta>\n");
+       }
+
+       n_rd = atoi(argv[1]);
+       n_wr = atoi(argv[2]);
+       n_threads = n_wr + n_rd;
+
+       a.delta = atoi(argv[3]);
+       a.request = 0;
+
+       threads = malloc(sizeof(pthread_t) * n_threads);
+       ck_epoch_init(&stack_epoch);
+
+       for (i = 0; i < n_rd; i++)
+               pthread_create(threads + i, NULL, read_thread, NULL);
+
+       do {
+               pthread_create(threads + i, NULL, write_thread, NULL);
+       } while (++i < n_wr + n_rd);
+
+       for (i = 0; i < n_threads; i++)
+               pthread_join(threads[i], NULL);
+
+       return (0);
+}

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_epoch/validate/ck_epoch_synchronize.c
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_epoch/validate/ck_epoch_synchronize.c 
b/lib/ck/regressions/ck_epoch/validate/ck_epoch_synchronize.c
new file mode 100644
index 0000000..3ce2de8
--- /dev/null
+++ b/lib/ck/regressions/ck_epoch/validate/ck_epoch_synchronize.c
@@ -0,0 +1,258 @@
+/*
+ * Copyright 2010-2014 Samy Al Bahra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <errno.h>
+#include <inttypes.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <unistd.h>
+#include <sys/time.h>
+
+#include <ck_backoff.h>
+#include <ck_cc.h>
+#include <ck_pr.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <string.h>
+#include <ck_epoch.h>
+#include <ck_stack.h>
+
+#include "../../common.h"
+
+static unsigned int n_rd;
+static unsigned int n_wr;
+static unsigned int n_threads;
+static unsigned int barrier;
+static unsigned int e_barrier;
+static unsigned int readers;
+static unsigned int writers;
+
+#ifndef PAIRS_S
+#define PAIRS_S 10000
+#endif
+
+#ifndef ITERATE_S
+#define ITERATE_S 20
+#endif
+
+struct node {
+       unsigned int value;
+       ck_stack_entry_t stack_entry;
+       ck_epoch_entry_t epoch_entry;
+};
+static ck_stack_t stack = CK_STACK_INITIALIZER;
+static ck_epoch_t stack_epoch;
+CK_STACK_CONTAINER(struct node, stack_entry, stack_container)
+CK_EPOCH_CONTAINER(struct node, epoch_entry, epoch_container)
+static struct affinity a;
+static const char animate[] = "-/|\\";
+
+static void
+destructor(ck_epoch_entry_t *p)
+{
+       struct node *e = epoch_container(p);
+
+       free(e);
+       return;
+}
+
+static void *
+read_thread(void *unused CK_CC_UNUSED)
+{
+       unsigned int j;
+       ck_epoch_record_t record CK_CC_CACHELINE;
+       ck_stack_entry_t *cursor;
+
+       /*
+        * This is redundant post-incremented in order to silence some
+        * irrelevant GCC warnings. It is volatile in order to prevent
+        * elimination.
+        */
+       volatile ck_stack_entry_t *n;
+
+       ck_epoch_register(&stack_epoch, &record);
+
+       if (aff_iterate(&a)) {
+               perror("ERROR: failed to affine thread");
+               exit(EXIT_FAILURE);
+       }
+
+       ck_pr_inc_uint(&barrier);
+       while (ck_pr_load_uint(&barrier) < n_threads);
+
+       while (CK_STACK_ISEMPTY(&stack) == true) {
+               if (ck_pr_load_uint(&readers) != 0)
+                       break;
+
+               ck_pr_stall();
+       }
+
+       j = 0;
+       for (;;) {
+               ck_epoch_begin(&stack_epoch, &record);
+               CK_STACK_FOREACH(&stack, cursor) {
+                       if (cursor == NULL)
+                               continue;
+
+                       n = CK_STACK_NEXT(cursor);
+
+                       /* Force n use. */
+                       j += ((uintptr_t)(void *)n & 0) + 1;
+               }
+               ck_epoch_end(&stack_epoch, &record);
+
+               if (j != 0 && ck_pr_load_uint(&readers) == 0)
+                       ck_pr_store_uint(&readers, 1);
+
+               if (CK_STACK_ISEMPTY(&stack) == true &&
+                   ck_pr_load_uint(&e_barrier) != 0)
+                       break;
+       }
+
+       ck_pr_inc_uint(&e_barrier);
+       while (ck_pr_load_uint(&e_barrier) < n_threads);
+
+       fprintf(stderr, "[R] Observed entries: %u\n", j);
+       return (NULL);
+}
+
+static void *
+write_thread(void *unused CK_CC_UNUSED)
+{
+       struct node **entry, *e;
+       unsigned int i, j, tid;
+       ck_epoch_record_t record;
+       ck_stack_entry_t *s;
+
+       ck_epoch_register(&stack_epoch, &record);
+
+       if (aff_iterate(&a)) {
+               perror("ERROR: failed to affine thread");
+               exit(EXIT_FAILURE);
+       }
+
+       tid = ck_pr_faa_uint(&writers, 1);
+       ck_pr_inc_uint(&barrier);
+       while (ck_pr_load_uint(&barrier) < n_threads);
+
+       entry = malloc(sizeof(struct node *) * PAIRS_S);
+       if (entry == NULL) {
+               ck_error("Failed allocation.\n");
+       }
+
+       for (j = 0; j < ITERATE_S; j++) {
+               for (i = 0; i < PAIRS_S; i++) {
+                       entry[i] = malloc(sizeof(struct node));
+                       if (entry == NULL) {
+                               ck_error("Failed individual allocation\n");
+                       }
+               }
+
+               for (i = 0; i < PAIRS_S; i++) {
+                       ck_stack_push_upmc(&stack, &entry[i]->stack_entry);
+               }
+
+               while (ck_pr_load_uint(&readers) == 0)
+                       ck_pr_stall();
+
+               if (tid == 0) {
+                       fprintf(stderr, "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b[W] 
%2.2f: %c",
+                           (double)j / ITERATE_S, animate[i % 
strlen(animate)]);
+               }
+
+               for (i = 0; i < PAIRS_S; i++) {
+                       ck_epoch_begin(&stack_epoch, &record);
+                       s = ck_stack_pop_upmc(&stack);
+                       e = stack_container(s);
+                       ck_epoch_end(&stack_epoch, &record);
+
+                       if (i & 1) {
+                               ck_epoch_synchronize(&stack_epoch, &record);
+                               ck_epoch_reclaim(&record);
+                       } else {
+                               ck_epoch_barrier(&stack_epoch, &record);
+                       }
+
+                       if (i & 1) {
+                               ck_epoch_call(&stack_epoch, &record, 
&e->epoch_entry, destructor);
+                       } else {
+                               if (tid == 0 && i % 8192)
+                                       fprintf(stderr, "\b%c", animate[i % 
strlen(animate)]);
+
+                               destructor(&e->epoch_entry);
+                       }
+               }
+       }
+
+       ck_epoch_synchronize(&stack_epoch, &record);
+
+       if (tid == 0) {
+               fprintf(stderr, "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b[W] 
Peak: %u (%2.2f%%)\n    Reclamations: %lu\n\n",
+                       record.n_peak,
+                       (double)record.n_peak / ((double)PAIRS_S * ITERATE_S) * 
100,
+                       record.n_dispatch);
+       }
+
+       ck_pr_inc_uint(&e_barrier);
+       while (ck_pr_load_uint(&e_barrier) < n_threads);
+       return (NULL);
+}
+
+int
+main(int argc, char *argv[])
+{
+       unsigned int i;
+       pthread_t *threads;
+
+       if (argc != 4) {
+               ck_error("Usage: stack <#readers> <#writers> <affinity 
delta>\n");
+       }
+
+       n_rd = atoi(argv[1]);
+       n_wr = atoi(argv[2]);
+       n_threads = n_wr + n_rd;
+
+       a.delta = atoi(argv[3]);
+       a.request = 0;
+
+       threads = malloc(sizeof(pthread_t) * n_threads);
+       ck_epoch_init(&stack_epoch);
+
+       for (i = 0; i < n_rd; i++)
+               pthread_create(threads + i, NULL, read_thread, NULL);
+
+       do {
+               pthread_create(threads + i, NULL, write_thread, NULL);
+       } while (++i < n_wr + n_rd);
+
+       for (i = 0; i < n_threads; i++)
+               pthread_join(threads[i], NULL);
+
+       return (0);
+}

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_epoch/validate/ck_stack.c
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_epoch/validate/ck_stack.c 
b/lib/ck/regressions/ck_epoch/validate/ck_stack.c
new file mode 100644
index 0000000..00356f8
--- /dev/null
+++ b/lib/ck/regressions/ck_epoch/validate/ck_stack.c
@@ -0,0 +1,164 @@
+/*
+ * Copyright 2010-2014 Samy Al Bahra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <errno.h>
+#include <inttypes.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <unistd.h>
+#include <sys/time.h>
+
+#include <ck_backoff.h>
+#include <ck_cc.h>
+#include <ck_pr.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <ck_epoch.h>
+#include <ck_stack.h>
+
+#include "../../common.h"
+
+static unsigned int n_threads;
+static unsigned int barrier;
+static unsigned int e_barrier;
+
+#ifndef PAIRS
+#define PAIRS 5000000
+#endif
+
+struct node {
+       unsigned int value;
+       ck_epoch_entry_t epoch_entry;
+       ck_stack_entry_t stack_entry;
+};
+static ck_stack_t stack = {NULL, NULL};
+static ck_epoch_t stack_epoch;
+CK_STACK_CONTAINER(struct node, stack_entry, stack_container)
+CK_EPOCH_CONTAINER(struct node, epoch_entry, epoch_container)
+static struct affinity a;
+
+static void
+destructor(ck_epoch_entry_t *p)
+{
+       struct node *e = epoch_container(p);
+
+       free(e);
+       return;
+}
+
+static void *
+thread(void *unused CK_CC_UNUSED)
+{
+       struct node **entry, *e;
+       ck_epoch_record_t record;
+       ck_stack_entry_t *s;
+       unsigned long smr = 0;
+       unsigned int i;
+
+       ck_epoch_register(&stack_epoch, &record);
+
+       if (aff_iterate(&a)) {
+               perror("ERROR: failed to affine thread");
+               exit(EXIT_FAILURE);
+       }
+
+       entry = malloc(sizeof(struct node *) * PAIRS);
+       if (entry == NULL) {
+               ck_error("Failed allocation.\n");
+       }
+
+       for (i = 0; i < PAIRS; i++) {
+               entry[i] = malloc(sizeof(struct node));
+               if (entry == NULL) {
+                       ck_error("Failed individual allocation\n");
+               }
+       }
+
+       ck_pr_inc_uint(&barrier);
+       while (ck_pr_load_uint(&barrier) < n_threads);
+
+       for (i = 0; i < PAIRS; i++) {
+               ck_epoch_begin(&stack_epoch, &record);
+               ck_stack_push_upmc(&stack, &entry[i]->stack_entry);
+               s = ck_stack_pop_upmc(&stack);
+               ck_epoch_end(&stack_epoch, &record);
+
+               e = stack_container(s);
+               ck_epoch_call(&stack_epoch, &record, &e->epoch_entry, 
destructor);
+               smr += ck_epoch_poll(&stack_epoch, &record) == false;
+       }
+
+       ck_pr_inc_uint(&e_barrier);
+       while (ck_pr_load_uint(&e_barrier) < n_threads);
+
+       fprintf(stderr, "Deferrals: %lu (%2.2f)\n", smr, (double)smr / PAIRS);
+       fprintf(stderr, "Peak: %u (%2.2f%%), %u pending\nReclamations: %lu\n\n",
+                       record.n_peak,
+                       (double)record.n_peak / PAIRS * 100,
+                       record.n_pending,
+                       record.n_dispatch);
+
+       ck_epoch_barrier(&stack_epoch, &record);
+       ck_pr_inc_uint(&e_barrier);
+       while (ck_pr_load_uint(&e_barrier) < (n_threads << 1));
+
+       if (record.n_pending != 0) {
+               ck_error("ERROR: %u pending, expecting none.\n",
+                               record.n_pending);
+       }
+
+       return (NULL);
+}
+
+int
+main(int argc, char *argv[])
+{
+       unsigned int i;
+       pthread_t *threads;
+
+       if (argc != 3) {
+               ck_error("Usage: stack <threads> <affinity delta>\n");
+       }
+
+       n_threads = atoi(argv[1]);
+       a.delta = atoi(argv[2]);
+       a.request = 0;
+
+       threads = malloc(sizeof(pthread_t) * n_threads);
+
+       ck_epoch_init(&stack_epoch);
+
+       for (i = 0; i < n_threads; i++)
+               pthread_create(threads + i, NULL, thread, NULL);
+
+       for (i = 0; i < n_threads; i++)
+               pthread_join(threads[i], NULL);
+
+       return (0);
+}

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_fifo/benchmark/Makefile
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_fifo/benchmark/Makefile 
b/lib/ck/regressions/ck_fifo/benchmark/Makefile
new file mode 100644
index 0000000..6e2df2a
--- /dev/null
+++ b/lib/ck/regressions/ck_fifo/benchmark/Makefile
@@ -0,0 +1,14 @@
+.PHONY: clean distribution
+
+OBJECTS=latency
+
+all: $(OBJECTS)
+
+latency: latency.c
+       $(CC) $(CFLAGS) -o latency latency.c
+
+clean:
+       rm -rf *~ *.o *.dSYM *.exe $(OBJECTS)
+
+include ../../../build/regressions.build
+CFLAGS+=$(PTHREAD_CFLAGS) -D_GNU_SOURCE

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_fifo/benchmark/latency.c
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_fifo/benchmark/latency.c 
b/lib/ck/regressions/ck_fifo/benchmark/latency.c
new file mode 100644
index 0000000..3c78b6f
--- /dev/null
+++ b/lib/ck/regressions/ck_fifo/benchmark/latency.c
@@ -0,0 +1,157 @@
+/*
+ * Copyright 2011-2014 Samy Al Bahra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <ck_fifo.h>
+#include <ck_spinlock.h>
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#include "../../common.h"
+
+#ifndef ENTRIES
+#define ENTRIES 4096
+#endif
+
+#ifndef STEPS
+#define STEPS 40000
+#endif
+
+int
+main(void)
+{
+       ck_spinlock_fas_t mutex = CK_SPINLOCK_FAS_INITIALIZER;
+       void *r;
+       uint64_t s, e, a;
+       unsigned int i;
+       unsigned int j;
+
+#if   defined(CK_F_FIFO_SPSC)
+       ck_fifo_spsc_t spsc_fifo;
+       ck_fifo_spsc_entry_t spsc_entry[ENTRIES];
+       ck_fifo_spsc_entry_t spsc_stub;
+#endif
+
+#if defined(CK_F_FIFO_MPMC)
+       ck_fifo_mpmc_t mpmc_fifo;
+       ck_fifo_mpmc_entry_t mpmc_entry[ENTRIES];
+       ck_fifo_mpmc_entry_t mpmc_stub;
+       ck_fifo_mpmc_entry_t *garbage;
+#endif
+
+#ifdef CK_F_FIFO_SPSC
+       a = 0;
+       for (i = 0; i < STEPS; i++) {
+               ck_fifo_spsc_init(&spsc_fifo, &spsc_stub);
+
+               s = rdtsc();
+               for (j = 0; j < ENTRIES; j++) {
+                       ck_spinlock_fas_lock(&mutex);
+                       ck_fifo_spsc_enqueue(&spsc_fifo, spsc_entry + j, NULL);
+                       ck_spinlock_fas_unlock(&mutex);
+               }
+               e = rdtsc();
+
+               a += e - s;
+       }
+       printf("    spinlock_enqueue: %16" PRIu64 "\n", a / STEPS / 
(sizeof(spsc_entry) / sizeof(*spsc_entry)));
+
+       a = 0;
+       for (i = 0; i < STEPS; i++) {
+               ck_fifo_spsc_init(&spsc_fifo, &spsc_stub);
+               for (j = 0; j < ENTRIES; j++)
+                       ck_fifo_spsc_enqueue(&spsc_fifo, spsc_entry + j, NULL);
+
+               s = rdtsc();
+               for (j = 0; j < ENTRIES; j++) {
+                       ck_spinlock_fas_lock(&mutex);
+                       ck_fifo_spsc_dequeue(&spsc_fifo, &r);
+                       ck_spinlock_fas_unlock(&mutex);
+               }
+               e = rdtsc();
+               a += e - s;
+       }
+       printf("    spinlock_dequeue: %16" PRIu64 "\n", a / STEPS / 
(sizeof(spsc_entry) / sizeof(*spsc_entry)));
+
+       a = 0;
+       for (i = 0; i < STEPS; i++) {
+               ck_fifo_spsc_init(&spsc_fifo, &spsc_stub);
+
+               s = rdtsc();
+               for (j = 0; j < ENTRIES; j++)
+                       ck_fifo_spsc_enqueue(&spsc_fifo, spsc_entry + j, NULL);
+               e = rdtsc();
+
+               a += e - s;
+       }
+       printf("ck_fifo_spsc_enqueue: %16" PRIu64 "\n", a / STEPS / 
(sizeof(spsc_entry) / sizeof(*spsc_entry)));
+
+       a = 0;
+       for (i = 0; i < STEPS; i++) {
+               ck_fifo_spsc_init(&spsc_fifo, &spsc_stub);
+               for (j = 0; j < ENTRIES; j++)
+                       ck_fifo_spsc_enqueue(&spsc_fifo, spsc_entry + j, NULL);
+
+               s = rdtsc();
+               for (j = 0; j < ENTRIES; j++)
+                       ck_fifo_spsc_dequeue(&spsc_fifo, &r);
+               e = rdtsc();
+               a += e - s;
+       }
+       printf("ck_fifo_spsc_dequeue: %16" PRIu64 "\n", a / STEPS / 
(sizeof(spsc_entry) / sizeof(*spsc_entry)));
+#endif
+
+#ifdef CK_F_FIFO_MPMC
+       a = 0;
+       for (i = 0; i < STEPS; i++) {
+               ck_fifo_mpmc_init(&mpmc_fifo, &mpmc_stub);
+
+               s = rdtsc();
+               for (j = 0; j < ENTRIES; j++)
+                       ck_fifo_mpmc_enqueue(&mpmc_fifo, mpmc_entry + j, NULL);
+               e = rdtsc();
+
+               a += e - s;
+       }
+       printf("ck_fifo_mpmc_enqueue: %16" PRIu64 "\n", a / STEPS / 
(sizeof(mpmc_entry) / sizeof(*mpmc_entry)));
+
+       a = 0;
+       for (i = 0; i < STEPS; i++) {
+               ck_fifo_mpmc_init(&mpmc_fifo, &mpmc_stub);
+               for (j = 0; j < ENTRIES; j++)
+                       ck_fifo_mpmc_enqueue(&mpmc_fifo, mpmc_entry + j, NULL);
+
+               s = rdtsc();
+               for (j = 0; j < ENTRIES; j++)
+                       ck_fifo_mpmc_dequeue(&mpmc_fifo, &r, &garbage);
+               e = rdtsc();
+               a += e - s;
+       }
+       printf("ck_fifo_mpmc_dequeue: %16" PRIu64 "\n", a / STEPS / 
(sizeof(mpmc_entry) / sizeof(*mpmc_entry)));
+#endif
+
+       return 0;
+}

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_fifo/validate/Makefile
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_fifo/validate/Makefile 
b/lib/ck/regressions/ck_fifo/validate/Makefile
new file mode 100644
index 0000000..6bfc696
--- /dev/null
+++ b/lib/ck/regressions/ck_fifo/validate/Makefile
@@ -0,0 +1,29 @@
+.PHONY: check clean distribution
+
+OBJECTS=ck_fifo_spsc ck_fifo_mpmc ck_fifo_spsc_iterator ck_fifo_mpmc_iterator
+
+all: $(OBJECTS)
+
+check: all
+       ./ck_fifo_spsc $(CORES) 1 64000
+       ./ck_fifo_mpmc $(CORES) 1 16000
+       ./ck_fifo_spsc_iterator
+       ./ck_fifo_mpmc_iterator
+
+ck_fifo_spsc: ck_fifo_spsc.c ../../../include/ck_fifo.h
+       $(CC) $(CFLAGS) -o ck_fifo_spsc ck_fifo_spsc.c
+
+ck_fifo_mpmc: ck_fifo_mpmc.c ../../../include/ck_fifo.h
+       $(CC) $(CFLAGS) -o ck_fifo_mpmc ck_fifo_mpmc.c
+
+ck_fifo_spsc_iterator: ck_fifo_spsc_iterator.c ../../../include/ck_fifo.h
+       $(CC) $(CFLAGS) -o ck_fifo_spsc_iterator ck_fifo_spsc_iterator.c
+
+ck_fifo_mpmc_iterator: ck_fifo_mpmc_iterator.c ../../../include/ck_fifo.h
+       $(CC) $(CFLAGS) -o ck_fifo_mpmc_iterator ck_fifo_mpmc_iterator.c
+
+clean:
+       rm -rf *.dSYM *.exe *~ *.o $(OBJECTS)
+
+include ../../../build/regressions.build
+CFLAGS+=$(PTHREAD_CFLAGS) -D_GNU_SOURCE

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_fifo/validate/ck_fifo_mpmc.c
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_fifo/validate/ck_fifo_mpmc.c 
b/lib/ck/regressions/ck_fifo/validate/ck_fifo_mpmc.c
new file mode 100644
index 0000000..cbf4d93
--- /dev/null
+++ b/lib/ck/regressions/ck_fifo/validate/ck_fifo_mpmc.c
@@ -0,0 +1,168 @@
+/*
+ * Copyright 2011-2014 Samy Al Bahra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <pthread.h>
+#include <ck_fifo.h>
+
+#include "../../common.h"
+
+#ifdef CK_F_FIFO_MPMC
+#ifndef ITERATIONS
+#define ITERATIONS 128
+#endif
+
+struct context {
+       unsigned int tid;
+       unsigned int previous;
+       unsigned int next;
+};
+
+struct entry {
+       int tid;
+       int value;
+};
+
+static int nthr;
+
+#ifdef CK_F_FIFO_MPMC
+static ck_fifo_mpmc_t fifo CK_CC_CACHELINE;
+#endif
+
+static struct affinity a;
+static int size;
+static unsigned int barrier;
+
+static void *
+test(void *c)
+{
+#ifdef CK_F_FIFO_MPMC
+       struct context *context = c;
+       struct entry *entry;
+       ck_fifo_mpmc_entry_t *fifo_entry, *garbage;
+       int i, j;
+
+        if (aff_iterate(&a)) {
+                perror("ERROR: Could not affine thread");
+                exit(EXIT_FAILURE);
+        }
+
+       ck_pr_inc_uint(&barrier);
+       while (ck_pr_load_uint(&barrier) < (unsigned int)nthr);
+
+       for (i = 0; i < ITERATIONS; i++) {
+               for (j = 0; j < size; j++) {
+                       fifo_entry = malloc(sizeof(ck_fifo_mpmc_entry_t));
+                       entry = malloc(sizeof(struct entry));
+                       entry->tid = context->tid;
+                       ck_fifo_mpmc_enqueue(&fifo, fifo_entry, entry);
+                       if (ck_fifo_mpmc_dequeue(&fifo, &entry, &garbage) == 
false) {
+                               ck_error("ERROR [%u] Queue should never be 
empty.\n", context->tid);
+                       }
+
+                       if (entry->tid < 0 || entry->tid >= nthr) {
+                               ck_error("ERROR [%u] Incorrect value in 
entry.\n", entry->tid);
+                       }
+               }
+       }
+
+       for (i = 0; i < ITERATIONS; i++) {
+               for (j = 0; j < size; j++) {
+                       fifo_entry = malloc(sizeof(ck_fifo_mpmc_entry_t));
+                       entry = malloc(sizeof(struct entry));
+                       entry->tid = context->tid;
+                       while (ck_fifo_mpmc_tryenqueue(&fifo, fifo_entry, 
entry) == false)
+                               ck_pr_stall();
+
+                       while (ck_fifo_mpmc_trydequeue(&fifo, &entry, &garbage) 
== false)
+                               ck_pr_stall();
+
+                       if (entry->tid < 0 || entry->tid >= nthr) {
+                               ck_error("ERROR [%u] Incorrect value in entry 
when using try interface.\n", entry->tid);
+                       }
+               }
+       }
+#endif
+
+       return (NULL);
+}
+
+int
+main(int argc, char *argv[])
+{
+       int i, r;
+       struct context *context;
+       ck_fifo_mpmc_entry_t *garbage;
+       pthread_t *thread;
+
+       if (argc != 4) {
+               ck_error("Usage: validate <threads> <affinity delta> <size>\n");
+       }
+
+       a.request = 0;
+       a.delta = atoi(argv[2]);
+
+       nthr = atoi(argv[1]);
+       assert(nthr >= 1);
+
+       size = atoi(argv[3]);
+       assert(size > 0);
+
+       context = malloc(sizeof(*context) * nthr);
+       assert(context);
+
+       thread = malloc(sizeof(pthread_t) * nthr);
+       assert(thread);
+
+       ck_fifo_mpmc_init(&fifo, malloc(sizeof(ck_fifo_mpmc_entry_t)));
+       ck_fifo_mpmc_deinit(&fifo, &garbage);
+       if (garbage == NULL)
+               ck_error("ERROR: Expected non-NULL stub node on deinit.\n");
+       free(garbage);
+       ck_fifo_mpmc_init(&fifo, malloc(sizeof(ck_fifo_mpmc_entry_t)));
+
+       for (i = 0; i < nthr; i++) {
+               context[i].tid = i;
+               r = pthread_create(thread + i, NULL, test, context + i);
+               assert(r == 0);
+       }
+
+       for (i = 0; i < nthr; i++)
+               pthread_join(thread[i], NULL);
+
+       return (0);
+}
+#else
+int
+main(void)
+{
+       fprintf(stderr, "Unsupported.\n");
+       return 0;
+}
+#endif
+

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_fifo/validate/ck_fifo_mpmc_iterator.c
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_fifo/validate/ck_fifo_mpmc_iterator.c 
b/lib/ck/regressions/ck_fifo/validate/ck_fifo_mpmc_iterator.c
new file mode 100644
index 0000000..5ac8175
--- /dev/null
+++ b/lib/ck/regressions/ck_fifo/validate/ck_fifo_mpmc_iterator.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2011 David Joseph.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <ck_fifo.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#ifdef CK_F_FIFO_MPMC
+struct example {
+       int x;
+};
+
+static ck_fifo_mpmc_t mpmc_fifo;
+
+int
+main(void)
+{
+       int i, length = 3;
+       struct example *examples;
+       ck_fifo_mpmc_entry_t *stub, *entries, *entry, *next;
+
+       stub = malloc(sizeof(ck_fifo_mpmc_entry_t));
+       if (stub == NULL)
+               exit(EXIT_FAILURE);
+
+       ck_fifo_mpmc_init(&mpmc_fifo, stub);
+
+       entries = malloc(sizeof(ck_fifo_mpmc_entry_t) * length);
+       if (entries == NULL)
+               exit(EXIT_FAILURE);
+
+       examples = malloc(sizeof(struct example) * length);
+       /* Need these for this unit test. */
+       if (examples == NULL)
+               exit(EXIT_FAILURE);
+
+       for (i = 0; i < length; ++i) {
+               examples[i].x = i;
+               ck_fifo_mpmc_enqueue(&mpmc_fifo, entries + i, examples + i);
+       }
+
+       puts("Testing CK_FIFO_MPMC_FOREACH.");
+       CK_FIFO_MPMC_FOREACH(&mpmc_fifo, entry) {
+               printf("Next value in fifo: %d\n", ((struct example 
*)entry->value)->x);
+       }
+
+       puts("Testing CK_FIFO_MPMC_FOREACH_SAFE.");
+       CK_FIFO_MPMC_FOREACH_SAFE(&mpmc_fifo, entry, next) {
+               if (entry->next.pointer != next)
+                       exit(EXIT_FAILURE);
+               printf("Next value in fifo: %d\n", ((struct example 
*)entry->value)->x);
+       }
+
+       free(examples);
+       free(entries);
+       free(stub);
+
+       return (0);
+}
+#else
+int
+main(void)
+{
+       return (0);
+}
+#endif

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_fifo/validate/ck_fifo_spsc.c
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_fifo/validate/ck_fifo_spsc.c 
b/lib/ck/regressions/ck_fifo/validate/ck_fifo_spsc.c
new file mode 100644
index 0000000..c2ae16e
--- /dev/null
+++ b/lib/ck/regressions/ck_fifo/validate/ck_fifo_spsc.c
@@ -0,0 +1,177 @@
+/*
+ * Copyright 2011-2014 Samy Al Bahra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <pthread.h>
+
+#include <ck_fifo.h>
+
+#include "../../common.h"
+
+#ifndef ITERATIONS
+#define ITERATIONS 128
+#endif
+
+struct context {
+       unsigned int tid;
+       unsigned int previous;
+       unsigned int next;
+};
+
+struct entry {
+       int tid;
+       int value;
+};
+
+static int nthr;
+static ck_fifo_spsc_t *fifo;
+static struct affinity a;
+static int size;
+static unsigned int barrier;
+
+static void *
+test(void *c)
+{
+       struct context *context = c;
+       struct entry *entry;
+       ck_fifo_spsc_entry_t *fifo_entry;
+       int i, j;
+
+        if (aff_iterate(&a)) {
+                perror("ERROR: Could not affine thread");
+                exit(EXIT_FAILURE);
+        }
+
+#ifdef DEBUG
+       fprintf(stderr, "%p %u: %u -> %u\n", fifo+context->tid, context->tid, 
context->previous, context->tid);
+#endif
+
+       if (context->tid == 0) {
+               struct entry *entries;
+
+               entries = malloc(sizeof(struct entry) * size);
+               assert(entries != NULL);
+
+               for (i = 0; i < size; i++) {
+                       entries[i].value = i;
+                       entries[i].tid = 0;
+
+                       fifo_entry = malloc(sizeof(ck_fifo_spsc_entry_t));
+                       ck_fifo_spsc_enqueue(fifo + context->tid, fifo_entry, 
entries + i);
+               }
+       }
+
+       ck_pr_inc_uint(&barrier);
+       while (ck_pr_load_uint(&barrier) < (unsigned int)nthr);
+
+       for (i = 0; i < ITERATIONS; i++) {
+               for (j = 0; j < size; j++) {
+                       while (ck_fifo_spsc_dequeue(fifo + context->previous, 
&entry) == false);
+                       if (context->previous != (unsigned int)entry->tid) {
+                               ck_error("T [%u:%p] %u != %u\n",
+                                       context->tid, (void *)entry, 
entry->tid, context->previous);
+                       }
+
+                       if (entry->value != j) {
+                               ck_error("V [%u:%p] %u != %u\n",
+                                       context->tid, (void *)entry, 
entry->value, j);
+                       }
+
+                       entry->tid = context->tid;
+                       fifo_entry = ck_fifo_spsc_recycle(fifo + context->tid);
+                       if (fifo_entry == NULL)
+                               fifo_entry = 
malloc(sizeof(ck_fifo_spsc_entry_t));
+
+                       ck_fifo_spsc_enqueue(fifo + context->tid, fifo_entry, 
entry);
+               }
+       }
+
+       return (NULL);
+}
+
+int
+main(int argc, char *argv[])
+{
+       int i, r;
+       struct context *context;
+       pthread_t *thread;
+
+       if (argc != 4) {
+               ck_error("Usage: validate <threads> <affinity delta> <size>\n");
+       }
+
+       a.request = 0;
+       a.delta = atoi(argv[2]);
+
+       nthr = atoi(argv[1]);
+       assert(nthr >= 1);
+
+       size = atoi(argv[3]);
+       assert(size > 0);
+
+       fifo = malloc(sizeof(ck_fifo_spsc_t) * nthr);
+       assert(fifo);
+
+       context = malloc(sizeof(*context) * nthr);
+       assert(context);
+
+       thread = malloc(sizeof(pthread_t) * nthr);
+       assert(thread);
+
+       for (i = 0; i < nthr; i++) {
+               ck_fifo_spsc_entry_t *garbage;
+
+               context[i].tid = i;
+               if (i == 0) {
+                       context[i].previous = nthr - 1;
+                       context[i].next = i + 1;
+               } else if (i == nthr - 1) {
+                       context[i].next = 0;
+                       context[i].previous = i - 1;
+               } else {
+                       context[i].next = i + 1;
+                       context[i].previous = i - 1;
+               }
+
+               ck_fifo_spsc_init(fifo + i, 
malloc(sizeof(ck_fifo_spsc_entry_t)));
+               ck_fifo_spsc_deinit(fifo + i, &garbage);
+               if (garbage == NULL)
+                       ck_error("ERROR: Expected non-NULL stub node on 
deinit.\n");
+
+               free(garbage);
+               ck_fifo_spsc_init(fifo + i, 
malloc(sizeof(ck_fifo_spsc_entry_t)));
+               r = pthread_create(thread + i, NULL, test, context + i);
+               assert(r == 0);
+       }
+
+       for (i = 0; i < nthr; i++)
+               pthread_join(thread[i], NULL);
+
+       return (0);
+}
+

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_fifo/validate/ck_fifo_spsc_iterator.c
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_fifo/validate/ck_fifo_spsc_iterator.c 
b/lib/ck/regressions/ck_fifo/validate/ck_fifo_spsc_iterator.c
new file mode 100644
index 0000000..97804de
--- /dev/null
+++ b/lib/ck/regressions/ck_fifo/validate/ck_fifo_spsc_iterator.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2011 David Joseph.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <ck_fifo.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+struct example {
+       int x;
+};
+
+static ck_fifo_spsc_t spsc_fifo;
+
+int
+main(void)
+{
+       int i, length = 3;
+       struct example *examples;
+       ck_fifo_spsc_entry_t *stub, *entries, *entry, *next;
+
+       stub = malloc(sizeof(ck_fifo_spsc_entry_t));
+       if (stub == NULL)
+               exit(EXIT_FAILURE);
+
+       ck_fifo_spsc_init(&spsc_fifo, stub);
+
+       entries = malloc(sizeof(ck_fifo_spsc_entry_t) * length);
+       if (entries == NULL)
+               exit(EXIT_FAILURE);
+
+       examples = malloc(sizeof(struct example) * length);
+       /* Need these for this unit test. */
+       if (examples == NULL)
+               exit(EXIT_FAILURE);
+
+       for (i = 0; i < length; ++i) {
+               examples[i].x = i;
+               ck_fifo_spsc_enqueue(&spsc_fifo, entries + i, examples + i);
+       }
+
+       puts("Testing CK_FIFO_SPSC_FOREACH.");
+       CK_FIFO_SPSC_FOREACH(&spsc_fifo, entry) {
+               printf("Next value in fifo: %d\n", ((struct example 
*)entry->value)->x);
+       }
+
+       puts("Testing CK_FIFO_SPSC_FOREACH_SAFE.");
+       CK_FIFO_SPSC_FOREACH_SAFE(&spsc_fifo, entry, next) {
+               if (entry->next != next)
+                       exit(EXIT_FAILURE);
+               printf("Next value in fifo: %d\n", ((struct example 
*)entry->value)->x);
+       }
+
+       free(examples);
+       free(entries);
+       free(stub);
+
+       return (0);
+}
+

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_hp/benchmark/Makefile
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_hp/benchmark/Makefile 
b/lib/ck/regressions/ck_hp/benchmark/Makefile
new file mode 100644
index 0000000..2025ea9
--- /dev/null
+++ b/lib/ck/regressions/ck_hp/benchmark/Makefile
@@ -0,0 +1,17 @@
+.PHONY: clean distribution
+
+OBJECTS=fifo_latency stack_latency
+
+all: $(OBJECTS)
+
+fifo_latency: fifo_latency.c
+       $(CC) $(CFLAGS) -o fifo_latency ../../../src/ck_hp.c fifo_latency.c
+
+stack_latency: stack_latency.c
+       $(CC) $(CFLAGS) -o stack_latency ../../../src/ck_hp.c stack_latency.c
+
+clean:
+       rm -rf *~ *.o *.dSYM *.exe $(OBJECTS)
+
+include ../../../build/regressions.build
+CFLAGS+=$(PTHREAD_CFLAGS) -D_GNU_SOURCE

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_hp/benchmark/fifo_latency.c
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_hp/benchmark/fifo_latency.c 
b/lib/ck/regressions/ck_hp/benchmark/fifo_latency.c
new file mode 100644
index 0000000..c32986b
--- /dev/null
+++ b/lib/ck/regressions/ck_hp/benchmark/fifo_latency.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2011-2014 Samy Al Bahra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <ck_hp.h>
+#include <ck_hp_fifo.h>
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "../../common.h"
+
+#ifndef ENTRIES
+#define ENTRIES 4096
+#endif
+
+#ifndef STEPS
+#define STEPS 40000
+#endif
+
+static ck_hp_fifo_t fifo;
+static ck_hp_t fifo_hp;
+
+int
+main(void)
+{
+       void *r;
+       uint64_t s, e, a;
+       unsigned int i;
+       unsigned int j;
+       ck_hp_fifo_entry_t hp_entry[ENTRIES];
+       ck_hp_fifo_entry_t hp_stub;
+       ck_hp_record_t record;
+
+       ck_hp_init(&fifo_hp, CK_HP_FIFO_SLOTS_COUNT, 1000000, NULL);
+
+       r = malloc(CK_HP_FIFO_SLOTS_SIZE);
+       if (r == NULL) {
+               ck_error("ERROR: Failed to allocate slots.\n");
+       }
+       ck_hp_register(&fifo_hp, &record, r);
+
+       a = 0;
+       for (i = 0; i < STEPS; i++) {
+               ck_hp_fifo_init(&fifo, &hp_stub);
+
+               s = rdtsc();
+               for (j = 0; j < ENTRIES; j++)
+                       ck_hp_fifo_enqueue_mpmc(&record, &fifo, hp_entry + j, 
NULL);
+               e = rdtsc();
+
+               a += e - s;
+       }
+       printf("ck_hp_fifo_enqueue_mpmc: %16" PRIu64 "\n", a / STEPS / ENTRIES);
+
+       a = 0;
+       for (i = 0; i < STEPS; i++) {
+               ck_hp_fifo_init(&fifo, &hp_stub);
+               for (j = 0; j < ENTRIES; j++)
+                       ck_hp_fifo_enqueue_mpmc(&record, &fifo, hp_entry + j, 
NULL);
+
+               s = rdtsc();
+               for (j = 0; j < ENTRIES; j++)
+                       ck_hp_fifo_dequeue_mpmc(&record, &fifo, &r);
+               e = rdtsc();
+               a += e - s;
+       }
+       printf("ck_hp_fifo_dequeue_mpmc: %16" PRIu64 "\n", a / STEPS / ENTRIES);
+
+       return 0;
+}

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_hp/benchmark/stack_latency.c
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_hp/benchmark/stack_latency.c 
b/lib/ck/regressions/ck_hp/benchmark/stack_latency.c
new file mode 100644
index 0000000..bdde7bd
--- /dev/null
+++ b/lib/ck/regressions/ck_hp/benchmark/stack_latency.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright 2011-2014 Samy Al Bahra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <ck_hp.h>
+#include <ck_hp_stack.h>
+#include <ck_stack.h>
+#include <inttypes.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "../../common.h"
+
+#ifndef ENTRIES
+#define ENTRIES 4096
+#endif
+
+#ifndef STEPS
+#define STEPS 40000
+#endif
+
+static ck_stack_t stack;
+static ck_hp_t stack_hp;
+
+int
+main(void)
+{
+       ck_hp_record_t record;
+       ck_stack_entry_t entry[ENTRIES];
+       uint64_t s, e, a;
+       unsigned int i;
+       unsigned int j;
+       void *r;
+
+       ck_hp_init(&stack_hp, CK_HP_STACK_SLOTS_COUNT, 1000000, NULL);
+       r = malloc(CK_HP_STACK_SLOTS_SIZE);
+       if (r == NULL) {
+               ck_error("ERROR: Failed to allocate slots.\n");
+       }
+       ck_hp_register(&stack_hp, &record, (void *)r);
+
+       a = 0;
+       for (i = 0; i < STEPS; i++) {
+               ck_stack_init(&stack);
+
+               s = rdtsc();
+               for (j = 0; j < ENTRIES; j++)
+                       ck_hp_stack_push_mpmc(&stack, entry + j);
+               e = rdtsc();
+
+               a += e - s;
+       }
+       printf("ck_hp_stack_push_mpmc: %16" PRIu64 "\n", a / STEPS / ENTRIES);
+
+       a = 0;
+       for (i = 0; i < STEPS; i++) {
+               ck_stack_init(&stack);
+
+               for (j = 0; j < ENTRIES; j++)
+                       ck_hp_stack_push_mpmc(&stack, entry + j);
+
+               s = rdtsc();
+               for (j = 0; j < ENTRIES; j++) {
+                       r = ck_hp_stack_pop_mpmc(&record, &stack);
+               }
+               e = rdtsc();
+               a += e - s;
+       }
+       printf(" ck_hp_stack_pop_mpmc: %16" PRIu64 "\n", a / STEPS / ENTRIES);
+
+       return 0;
+}

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_hp/validate/Makefile
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_hp/validate/Makefile 
b/lib/ck/regressions/ck_hp/validate/Makefile
new file mode 100644
index 0000000..476b34f
--- /dev/null
+++ b/lib/ck/regressions/ck_hp/validate/Makefile
@@ -0,0 +1,33 @@
+.PHONY: check clean distribution
+
+OBJECTS=ck_hp_stack nbds_haz_test serial ck_hp_fifo ck_hp_fifo_donner
+
+all: $(OBJECTS)
+
+check: all
+       ./serial
+       ./ck_hp_stack $(CORES) 100 1
+       ./ck_hp_fifo $(CORES) 1 16384 100
+       ./nbds_haz_test $(CORES) 15 1
+       ./ck_hp_fifo_donner $(CORES) 16384
+
+ck_hp_stack: ../../../src/ck_hp.c ck_hp_stack.c ../../../include/ck_hp_stack.h
+       $(CC) $(CFLAGS) ../../../src/ck_hp.c -o ck_hp_stack ck_hp_stack.c
+
+ck_hp_fifo: ../../../src/ck_hp.c ck_hp_fifo.c ../../../include/ck_hp_fifo.h
+       $(CC) $(CFLAGS) ../../../src/ck_hp.c -o ck_hp_fifo ck_hp_fifo.c
+
+ck_hp_fifo_donner: ../../../src/ck_hp.c ck_hp_fifo_donner.c 
../../../include/ck_hp_fifo.h
+       $(CC) $(CFLAGS) ../../../src/ck_hp.c -o ck_hp_fifo_donner 
ck_hp_fifo_donner.c
+
+serial: ../../../src/ck_hp.c serial.c ../../../include/ck_hp_stack.h
+       $(CC) $(CFLAGS) ../../../src/ck_hp.c -o serial serial.c
+
+nbds_haz_test: ../../../src/ck_hp.c nbds_haz_test.c
+       $(CC) $(CFLAGS) ../../../src/ck_hp.c -o nbds_haz_test nbds_haz_test.c
+
+clean:
+       rm -rf *~ *.o *.dSYM *.exe $(OBJECTS)
+
+include ../../../build/regressions.build
+CFLAGS+=$(PTHREAD_CFLAGS) -D_GNU_SOURCE

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_hp/validate/ck_hp_fifo.c
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_hp/validate/ck_hp_fifo.c 
b/lib/ck/regressions/ck_hp/validate/ck_hp_fifo.c
new file mode 100644
index 0000000..297041b
--- /dev/null
+++ b/lib/ck/regressions/ck_hp/validate/ck_hp_fifo.c
@@ -0,0 +1,187 @@
+/*
+ * Copyright 2011-2014 Samy Al Bahra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <pthread.h>
+#include <ck_hp_fifo.h>
+
+#include "../../common.h"
+
+#ifndef ITERATIONS
+#define ITERATIONS 128
+#endif
+
+struct context {
+       unsigned int tid;
+       unsigned int previous;
+       unsigned int next;
+};
+
+struct entry {
+       int tid;
+       int value;
+};
+
+static ck_hp_fifo_t fifo;
+static ck_hp_t fifo_hp;
+static int nthr;
+
+static struct affinity a;
+static int size;
+static unsigned int barrier;
+static unsigned int e_barrier;
+
+static void *
+test(void *c)
+{
+       struct context *context = c;
+       struct entry *entry;
+       ck_hp_fifo_entry_t *fifo_entry;
+       ck_hp_record_t record;
+       int i, j;
+
+        if (aff_iterate(&a)) {
+                perror("ERROR: Could not affine thread");
+                exit(EXIT_FAILURE);
+        }
+
+       ck_hp_register(&fifo_hp, &record, malloc(sizeof(void *) * 2));
+       ck_pr_inc_uint(&barrier);
+       while (ck_pr_load_uint(&barrier) < (unsigned int)nthr);
+
+       for (i = 0; i < ITERATIONS; i++) {
+               for (j = 0; j < size; j++) {
+                       fifo_entry = malloc(sizeof(ck_hp_fifo_entry_t));
+                       entry = malloc(sizeof(struct entry));
+                       entry->tid = context->tid;
+                       ck_hp_fifo_enqueue_mpmc(&record, &fifo, fifo_entry, 
entry);
+
+                       ck_pr_barrier();
+
+                       fifo_entry = ck_hp_fifo_dequeue_mpmc(&record, &fifo, 
&entry);
+                       if (fifo_entry == NULL) {
+                               ck_error("ERROR [%u] Queue should never be 
empty.\n", context->tid);
+                       }
+
+                       ck_pr_barrier();
+
+                       if (entry->tid < 0 || entry->tid >= nthr) {
+                               ck_error("ERROR [%u] Incorrect value in 
entry.\n", entry->tid);
+                       }
+
+                       ck_hp_free(&record, &fifo_entry->hazard, fifo_entry, 
fifo_entry);
+               }
+       }
+
+       for (i = 0; i < ITERATIONS; i++) {
+               for (j = 0; j < size; j++) {
+                       fifo_entry = malloc(sizeof(ck_hp_fifo_entry_t));
+                       entry = malloc(sizeof(struct entry));
+                       entry->tid = context->tid;
+
+                       while (ck_hp_fifo_tryenqueue_mpmc(&record, &fifo, 
fifo_entry, entry) == false)
+                               ck_pr_stall();
+
+                       while (fifo_entry = ck_hp_fifo_trydequeue_mpmc(&record, 
&fifo, &entry), fifo_entry == NULL)
+                               ck_pr_stall();
+
+                       if (entry->tid < 0 || entry->tid >= nthr) {
+                               ck_error("ERROR [%u] Incorrect value in 
entry.\n", entry->tid);
+                       }
+
+                       ck_hp_free(&record, &fifo_entry->hazard, fifo_entry, 
fifo_entry);
+               }
+       }
+
+       ck_pr_inc_uint(&e_barrier);
+       while (ck_pr_load_uint(&e_barrier) < (unsigned int)nthr);
+
+       return (NULL);
+}
+
+static void
+destructor(void *p)
+{
+
+       free(p);
+       return;
+}
+
+int
+main(int argc, char *argv[])
+{
+       int i, r;
+       struct context *context;
+       pthread_t *thread;
+       int threshold;
+
+       if (argc != 5) {
+               ck_error("Usage: validate <threads> <affinity delta> <size> 
<threshold>\n");
+       }
+
+       a.delta = atoi(argv[2]);
+
+       nthr = atoi(argv[1]);
+       assert(nthr >= 1);
+
+       size = atoi(argv[3]);
+       assert(size > 0);
+
+       threshold = atoi(argv[4]);
+       assert(threshold > 0);
+
+       context = malloc(sizeof(*context) * nthr);
+       assert(context);
+
+       thread = malloc(sizeof(pthread_t) * nthr);
+       assert(thread);
+
+       ck_hp_init(&fifo_hp, 2, threshold, destructor);
+       ck_hp_fifo_init(&fifo, malloc(sizeof(ck_hp_fifo_entry_t)));
+
+       ck_hp_fifo_entry_t *entry;
+       ck_hp_fifo_deinit(&fifo, &entry);
+
+       if (entry == NULL)
+               ck_error("ERROR: Expected non-NULL stub node.\n");
+
+       free(entry);
+       ck_hp_fifo_init(&fifo, malloc(sizeof(ck_hp_fifo_entry_t)));
+
+       for (i = 0; i < nthr; i++) {
+               context[i].tid = i;
+               r = pthread_create(thread + i, NULL, test, context + i);
+               assert(r == 0);
+       }
+
+       for (i = 0; i < nthr; i++)
+               pthread_join(thread[i], NULL);
+
+       return (0);
+}
+

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_hp/validate/ck_hp_fifo_donner.c
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_hp/validate/ck_hp_fifo_donner.c 
b/lib/ck/regressions/ck_hp/validate/ck_hp_fifo_donner.c
new file mode 100644
index 0000000..43e00ae
--- /dev/null
+++ b/lib/ck/regressions/ck_hp/validate/ck_hp_fifo_donner.c
@@ -0,0 +1,213 @@
+/*
+ * Copyright 2012 Hendrik Donner
+ * Copyright 2012-2014 Samy Al Bahra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <ck_hp.h>
+#include <ck_hp_fifo.h>
+#include <ck_pr.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <pthread.h>
+#include <sys/time.h>
+#include <assert.h>
+#include "../../common.h"
+
+/* FIFO queue */
+static ck_hp_fifo_t fifo;
+
+/* Hazard pointer global */
+static ck_hp_t fifo_hp;
+
+/* thread local element count */
+static unsigned long *count; 
+
+static unsigned long thread_count;
+
+static unsigned int start_barrier;
+static unsigned int end_barrier;
+
+/* destructor for FIFO queue */
+static void
+destructor(void *p)
+{
+
+       free(p);
+       return;
+}
+
+/* entry struct for FIFO queue entries */
+struct entry {
+       unsigned long value;
+};
+
+/* function for thread */
+static void *
+queue_50_50(void *elements)
+{
+        struct entry *entry;
+        ck_hp_fifo_entry_t *fifo_entry;
+       ck_hp_record_t *record;
+       void *slots;
+        unsigned long j, element_count = *(unsigned long *)elements;
+       unsigned int seed;
+
+       record = malloc(sizeof(ck_hp_record_t));
+       assert(record);
+       
+       slots = malloc(CK_HP_FIFO_SLOTS_SIZE);
+       assert(slots);
+       
+        /* different seed for each thread */
+       seed = 1337; /*(unsigned int) pthread_self(); */
+
+        /*
+         * This subscribes the thread to the fifo_hp state using the 
thread-owned
+         * record.
+         * FIFO queue needs 2 hazard pointers.
+         */
+        ck_hp_register(&fifo_hp, record, slots);
+
+       /* start barrier */
+       ck_pr_inc_uint(&start_barrier);
+       while (ck_pr_load_uint(&start_barrier) < thread_count + 1)
+               ck_pr_stall();
+
+       /* 50/50 enqueue-dequeue */
+       for(j = 0; j < element_count; j++) {
+               /* rand_r with thread local state should be thread safe */
+               if( 50 < (1+(int) (100.0*common_rand_r(&seed)/(RAND_MAX+1.0)))) 
{
+                       /* This is the container for the enqueued data. */
+                       fifo_entry = malloc(sizeof(ck_hp_fifo_entry_t));
+
+                       if (fifo_entry == NULL) {
+                               exit(EXIT_FAILURE);
+                       }
+
+                       /* This is the data. */
+                       entry = malloc(sizeof(struct entry));
+                       if (entry != NULL) {
+                               entry->value = j;
+                       }
+
+                      /*
+                       * Enqueue the value of the pointer entry into FIFO 
queue using the
+                       * container fifo_entry.
+                       */
+                       ck_hp_fifo_enqueue_mpmc(record, &fifo, fifo_entry, 
entry);
+               } else {
+                       /*
+                        * ck_hp_fifo_dequeue_mpmc will return a pointer to the 
first unused node and store
+                        * the value of the first pointer in the FIFO queue in 
entry.
+                        */
+                       fifo_entry = ck_hp_fifo_dequeue_mpmc(record, &fifo, 
&entry);
+                       if (fifo_entry != NULL) {
+                                       /*
+                                        * Safely reclaim memory associated 
with fifo_entry.
+                                * This inserts garbage into a local list. Once 
the list (plist) reaches
+                                * a length of 100, ck_hp_free will attempt to 
reclaim all references
+                                * to objects on the list.
+                                */
+                               ck_hp_free(record, &fifo_entry->hazard, 
fifo_entry, fifo_entry);
+                       }
+               }
+       }
+
+       /* end barrier */
+       ck_pr_inc_uint(&end_barrier);
+       while (ck_pr_load_uint(&end_barrier) < thread_count + 1)
+               ck_pr_stall();
+
+               return NULL;
+}
+
+int
+main(int argc, char** argv)
+{
+        ck_hp_fifo_entry_t *stub;
+        unsigned long element_count, i;
+       pthread_t *thr;
+
+        if (argc != 3) {
+               ck_error("Usage: cktest <thread_count> <element_count>\n");
+        }
+
+        /* Get element count from argument */
+        element_count = atoi(argv[2]);
+
+       /* Get element count from argument */
+        thread_count = atoi(argv[1]);
+
+       /* pthread handles */
+       thr = malloc(sizeof(pthread_t) * thread_count);
+
+       /* array for local operation count */
+       count = malloc(sizeof(unsigned long *) * thread_count);
+       
+        /*
+         * Initialize global hazard pointer safe memory reclamation to execute 
free()
+         * when a fifo_entry is safe to be deleted.
+         * Hazard pointer scan routine will be called when the thread local 
intern plist's
+         * size exceed 100 entries.
+         */
+
+       /* FIFO queue needs 2 hazard pointers */
+       ck_hp_init(&fifo_hp, CK_HP_FIFO_SLOTS_COUNT, 100, destructor);
+
+        /* The FIFO requires one stub entry on initialization. */
+        stub = malloc(sizeof(ck_hp_fifo_entry_t));
+
+        /* Behavior is undefined if stub is NULL. */
+        if (stub == NULL) {
+                exit(EXIT_FAILURE);
+       }
+
+        /* This is called once to initialize the fifo. */
+        ck_hp_fifo_init(&fifo, stub);
+
+       /* Create threads */
+       for (i = 0; i < thread_count; i++) {
+               count[i] = (element_count + i) / thread_count;
+               if (pthread_create(&thr[i], NULL, queue_50_50, (void *) 
&count[i]) != 0) {
+                       exit(EXIT_FAILURE);
+                }
+       }
+
+       /* start barrier */
+       ck_pr_inc_uint(&start_barrier);
+       while (ck_pr_load_uint(&start_barrier) < thread_count + 1);
+
+       /* end barrier */
+       ck_pr_inc_uint(&end_barrier);
+       while (ck_pr_load_uint(&end_barrier) < thread_count + 1);
+
+       /* Join threads */
+       for (i = 0; i < thread_count; i++)
+               pthread_join(thr[i], NULL);
+
+        return 0;
+}
+

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_hp/validate/ck_hp_stack.c
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_hp/validate/ck_hp_stack.c 
b/lib/ck/regressions/ck_hp/validate/ck_hp_stack.c
new file mode 100644
index 0000000..b028ce0
--- /dev/null
+++ b/lib/ck/regressions/ck_hp/validate/ck_hp_stack.c
@@ -0,0 +1,165 @@
+/*
+ * Copyright 2010-2014 Samy Al Bahra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <errno.h>
+#include <inttypes.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <unistd.h>
+#include <sys/time.h>
+
+#include <ck_backoff.h>
+#include <ck_cc.h>
+#include <ck_pr.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <ck_hp.h>
+#include <ck_stack.h>
+#include <ck_hp_stack.h>
+
+#include "../../common.h"
+
+static unsigned int threshold;
+static unsigned int n_threads;
+static unsigned int barrier;
+static unsigned int e_barrier;
+
+#ifndef PAIRS
+#define PAIRS 5000000
+#endif
+
+struct node {
+       unsigned int value;
+       ck_hp_hazard_t hazard;
+       ck_stack_entry_t stack_entry;
+};
+static ck_stack_t stack = {NULL, NULL};
+static ck_hp_t stack_hp;
+CK_STACK_CONTAINER(struct node, stack_entry, stack_container)
+static struct affinity a;
+
+static void *
+thread(void *unused CK_CC_UNUSED)
+{
+       struct node **entry, *e;
+       unsigned int i;
+       ck_hp_record_t record;
+       void **pointers;
+       ck_stack_entry_t *s;
+
+       unused = NULL;
+       pointers = malloc(sizeof(void *));
+       ck_hp_register(&stack_hp, &record, pointers);
+
+       if (aff_iterate(&a)) {
+               perror("ERROR: failed to affine thread");
+               exit(EXIT_FAILURE);
+       }
+
+       entry = malloc(sizeof(struct node *) * PAIRS);
+       if (entry == NULL) {
+               ck_error("Failed allocation.\n");
+       }
+
+       for (i = 0; i < PAIRS; i++) {
+               entry[i] = malloc(sizeof(struct node));
+               if (entry == NULL) {
+                       ck_error("Failed individual allocation\n");
+               }
+       }
+
+       ck_pr_inc_uint(&barrier);
+       while (ck_pr_load_uint(&barrier) < n_threads)
+               ck_pr_stall();
+
+       for (i = 0; i < PAIRS; i++) {
+               ck_hp_stack_push_mpmc(&stack, &entry[i]->stack_entry);
+               s = ck_hp_stack_pop_mpmc(&record, &stack);
+               e = stack_container(s);
+               ck_hp_free(&record, &e->hazard, e, s);
+       }
+
+       ck_pr_inc_uint(&e_barrier);
+       while (ck_pr_load_uint(&e_barrier) < n_threads)
+               ck_pr_stall();
+
+        fprintf(stderr, "Peak: %u (%2.2f%%)\nReclamations: %" PRIu64 "\n\n",
+                record.n_peak,
+               (double)record.n_peak / PAIRS * 100,
+               record.n_reclamations);
+
+       ck_hp_clear(&record);
+       ck_hp_purge(&record);
+
+        ck_pr_inc_uint(&e_barrier);
+        while (ck_pr_load_uint(&e_barrier) < (n_threads << 1));
+
+        if (record.n_pending != 0) {
+                ck_error("ERROR: %u pending, expecting none.\n",
+                                record.n_pending);
+        }
+
+       return (NULL);
+}
+
+static void
+destructor(void *p)
+{
+
+       free(p);
+       return;
+}
+
+int
+main(int argc, char *argv[])
+{
+       unsigned int i;
+       pthread_t *threads;
+
+       if (argc != 4) {
+               ck_error("Usage: stack <threads> <threshold> <delta>\n");
+       }
+
+       n_threads = atoi(argv[1]);
+       threshold = atoi(argv[2]);
+       a.delta = atoi(argv[3]);
+       a.request = 0;
+
+       threads = malloc(sizeof(pthread_t) * n_threads);
+
+       ck_hp_init(&stack_hp, 1, threshold, destructor);
+
+       for (i = 0; i < n_threads; i++)
+               pthread_create(threads + i, NULL, thread, NULL);
+
+       for (i = 0; i < n_threads; i++)
+               pthread_join(threads[i], NULL);
+
+       return (0);
+}

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_hp/validate/nbds_haz_test.c
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_hp/validate/nbds_haz_test.c 
b/lib/ck/regressions/ck_hp/validate/nbds_haz_test.c
new file mode 100644
index 0000000..a0346b4
--- /dev/null
+++ b/lib/ck/regressions/ck_hp/validate/nbds_haz_test.c
@@ -0,0 +1,224 @@
+/*
+ * Copyright 2010-2014 Samy Al Bahra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * This is a unit test similar to the implementation in John Dybnis's nbds
+ * test.
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <unistd.h>
+#include <sys/time.h>
+
+#include <ck_pr.h>
+
+#include <ck_backoff.h>
+#include <ck_cc.h>
+#include <ck_pr.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <ck_hp.h>
+
+#include "../../common.h"
+
+#define STACK_CONTAINER(T, M, N) CK_CC_CONTAINER(stack_entry_t, T, M, N)
+
+struct stack_entry {
+       struct stack_entry *next;
+} CK_CC_ALIGN(8);
+typedef struct stack_entry stack_entry_t;
+
+struct stack {
+       struct stack_entry *head;
+       char *generation;
+} CK_CC_PACKED CK_CC_ALIGN(16);
+typedef struct stack hp_stack_t;
+
+static unsigned int threshold;
+static unsigned int n_threads;
+static unsigned int barrier;
+static unsigned int e_barrier;
+static unsigned int global_tid;
+static unsigned int pops;
+static unsigned int pushs;
+
+#ifndef PAIRS
+#define PAIRS 1000000
+#endif
+
+struct node {
+       unsigned int value;
+       ck_hp_hazard_t hazard;
+       stack_entry_t stack_entry;
+};
+hp_stack_t stack = {NULL, NULL};
+ck_hp_t stack_hp;
+
+STACK_CONTAINER(struct node, stack_entry, stack_container)
+static struct affinity a;
+
+/*
+ * Stack producer operation safe for multiple unique producers and multiple 
consumers.
+ */
+CK_CC_INLINE static void
+stack_push_mpmc(struct stack *target, struct stack_entry *entry)
+{
+       struct stack_entry *lstack;
+       ck_backoff_t backoff = CK_BACKOFF_INITIALIZER;
+
+       lstack = ck_pr_load_ptr(&target->head);
+       ck_pr_store_ptr(&entry->next, lstack);
+
+       while (ck_pr_cas_ptr_value(&target->head, lstack, entry, &lstack) == 
false) {
+               ck_pr_store_ptr(&entry->next, lstack);
+               ck_backoff_eb(&backoff);
+       }
+
+       return;
+}
+
+/*
+ * Stack consumer operation safe for multiple unique producers and multiple 
consumers.
+ */
+CK_CC_INLINE static struct stack_entry *
+stack_pop_mpmc(ck_hp_record_t *record, struct stack *target)
+{
+       struct stack_entry *entry;
+       ck_backoff_t backoff = CK_BACKOFF_INITIALIZER;
+
+       do {
+               entry = ck_pr_load_ptr(&target->head);
+               if (entry == NULL)
+                       return (NULL);
+
+               ck_hp_set(record, 0, entry);
+       } while (entry != ck_pr_load_ptr(&target->head));
+
+       while (ck_pr_cas_ptr_value(&target->head, entry, entry->next, &entry) 
== false) {
+               if (ck_pr_load_ptr(&entry) == NULL)
+                       break;
+
+               ck_hp_set(record, 0, entry);
+               if (entry != ck_pr_load_ptr(&target->head))
+                       continue;
+
+               ck_backoff_eb(&backoff);
+       }
+
+       return (entry);
+}
+
+static void *
+thread(void *unused CK_CC_UNUSED)
+{
+       struct node *entry, *e;
+       unsigned int i;
+       ck_hp_record_t record;
+       void **pointers;
+       stack_entry_t *s;
+       unsigned int tid = ck_pr_faa_uint(&global_tid, 1) + 1;
+       unsigned int r = (unsigned int)(tid + 1) * 0x5bd1e995;
+
+       unused = NULL;
+       pointers = malloc(sizeof(void *));
+       ck_hp_register(&stack_hp, &record, pointers);
+
+       if (aff_iterate(&a)) {
+               perror("ERROR: failed to affine thread");
+               exit(EXIT_FAILURE);
+       }
+
+       ck_pr_inc_uint(&barrier);
+       while (ck_pr_load_uint(&barrier) < n_threads)
+               ck_pr_stall();
+
+       for (i = 0; i < PAIRS; i++) {
+               r ^= r << 6; r ^= r >> 21; r ^= r << 7;
+
+               if (r & 0x1000) {
+                       entry = malloc(sizeof(struct node));
+                       assert(entry);
+                       stack_push_mpmc(&stack, &entry->stack_entry);
+                       ck_pr_inc_uint(&pushs);
+               } else {
+                       s = stack_pop_mpmc(&record, &stack);
+                       if (s == NULL)
+                               continue;
+
+                       e = stack_container(s);
+                       ck_hp_free(&record, &e->hazard, e, s);
+                       ck_pr_inc_uint(&pops);
+               }
+       }
+
+       ck_pr_inc_uint(&e_barrier);
+       while (ck_pr_load_uint(&e_barrier) < n_threads);
+
+       return (NULL);
+}
+
+static void
+destructor(void *p)
+{
+       free(p);
+       return;
+}
+
+int
+main(int argc, char *argv[])
+{
+       unsigned int i;
+       pthread_t *threads;
+
+       if (argc != 4) {
+               ck_error("Usage: stack <threads> <threshold> <delta>\n");
+       }
+
+       n_threads = atoi(argv[1]);
+       threshold = atoi(argv[2]);
+       a.delta = atoi(argv[3]);
+       a.request = 0;
+
+       threads = malloc(sizeof(pthread_t) * n_threads);
+
+       ck_hp_init(&stack_hp, 1, threshold, destructor);
+
+       for (i = 0; i < n_threads; i++)
+               pthread_create(threads + i, NULL, thread, NULL);
+
+       for (i = 0; i < n_threads; i++)
+               pthread_join(threads[i], NULL);
+
+       fprintf(stderr, "Push: %u\nPop: %u\n", pushs, pops);
+       return (0);
+}

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_hp/validate/serial.c
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_hp/validate/serial.c 
b/lib/ck/regressions/ck_hp/validate/serial.c
new file mode 100644
index 0000000..0385686
--- /dev/null
+++ b/lib/ck/regressions/ck_hp/validate/serial.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2010-2014 Samy Al Bahra.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <errno.h>
+#include <inttypes.h>
+#include <pthread.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+#include <unistd.h>
+#include <sys/time.h>
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <ck_hp.h>
+
+#include "../../common.h"
+
+struct entry {
+       unsigned int value;
+       ck_hp_hazard_t hazard;
+};
+
+static void
+destructor(void *pointer)
+{
+
+       fprintf(stderr, "Free %p\n", pointer);
+       free(pointer);
+       return;
+}
+
+int
+main(int argc, char *argv[])
+{
+       ck_hp_t state;
+       ck_hp_record_t record[2];
+       void **pointers;
+       struct entry *entry, *other;
+
+       (void)argc;
+       (void)argv;
+
+       ck_hp_init(&state, 1, 1, destructor);
+
+       pointers = malloc(sizeof(void *));
+       if (pointers == NULL) {
+               ck_error("ERROR: Failed to allocate slot.\n");
+       }
+       ck_hp_register(&state, &record[0], pointers);
+       ck_hp_reclaim(&record[0]);
+
+       entry = malloc(sizeof *entry);
+       ck_hp_set(&record[0], 0, entry);
+       ck_hp_reclaim(&record[0]);
+       ck_hp_free(&record[0], &entry->hazard, entry, entry);
+       ck_hp_reclaim(&record[0]);
+       ck_hp_set(&record[0], 0, NULL);
+       ck_hp_reclaim(&record[0]);
+
+       entry = malloc(sizeof *entry);
+       ck_hp_set(&record[0], 0, entry);
+       ck_hp_reclaim(&record[0]);
+       ck_hp_free(&record[0], &entry->hazard, entry, entry);
+       ck_hp_reclaim(&record[0]);
+       ck_hp_set(&record[0], 0, NULL);
+       ck_hp_reclaim(&record[0]);
+
+       pointers = malloc(sizeof(void *));
+       if (pointers == NULL) {
+               ck_error("ERROR: Failed to allocate slot.\n");
+       }
+       ck_hp_register(&state, &record[1], pointers);
+       ck_hp_reclaim(&record[1]);
+
+       entry = malloc(sizeof *entry);
+       ck_hp_set(&record[1], 0, entry);
+       ck_hp_reclaim(&record[1]);
+       ck_hp_free(&record[1], &entry->hazard, entry, entry);
+       ck_hp_reclaim(&record[1]);
+       ck_hp_set(&record[1], 0, NULL);
+       ck_hp_reclaim(&record[1]);
+
+       printf("Allocating entry and freeing in other HP record...\n");
+       entry = malloc(sizeof *entry);
+       entry->value = 42;
+       ck_hp_set(&record[0], 0, entry);
+       ck_hp_free(&record[1], &entry->hazard, entry, entry);
+       ck_pr_store_uint(&entry->value, 1);
+
+       other = malloc(sizeof *other);
+       other->value = 24;
+       ck_hp_set(&record[1], 0, other);
+       ck_hp_free(&record[0], &other->hazard, other, other);
+       ck_pr_store_uint(&other->value, 32);
+       ck_hp_set(&record[0], 0, NULL);
+       ck_hp_reclaim(&record[1]);
+       ck_hp_set(&record[1], 0, NULL);
+       ck_hp_reclaim(&record[0]);
+       ck_hp_reclaim(&record[1]);
+
+       return 0;
+}

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/f098175e/lib/ck/regressions/ck_hs/benchmark/Makefile
----------------------------------------------------------------------
diff --git a/lib/ck/regressions/ck_hs/benchmark/Makefile 
b/lib/ck/regressions/ck_hs/benchmark/Makefile
new file mode 100644
index 0000000..ca20809
--- /dev/null
+++ b/lib/ck/regressions/ck_hs/benchmark/Makefile
@@ -0,0 +1,20 @@
+.PHONY: clean distribution
+
+OBJECTS=serial parallel_bytestring parallel_bytestring.delete
+
+all: $(OBJECTS)
+
+serial: serial.c ../../../include/ck_hs.h ../../../src/ck_hs.c
+       $(CC) $(CFLAGS) -o serial serial.c ../../../src/ck_hs.c
+
+parallel_bytestring: parallel_bytestring.c ../../../include/ck_hs.h 
../../../src/ck_hs.c ../../../src/ck_epoch.c
+       $(CC) $(PTHREAD_CFLAGS) $(CFLAGS) -o parallel_bytestring 
parallel_bytestring.c ../../../src/ck_hs.c ../../../src/ck_epoch.c
+
+parallel_bytestring.delete: parallel_bytestring.c ../../../include/ck_hs.h 
../../../src/ck_hs.c ../../../src/ck_epoch.c
+       $(CC) $(PTHREAD_CFLAGS) $(CFLAGS) -DHS_DELETE -o 
parallel_bytestring.delete parallel_bytestring.c ../../../src/ck_hs.c 
../../../src/ck_epoch.c
+
+clean:
+       rm -rf *~ *.o $(OBJECTS) *.dSYM *.exe
+
+include ../../../build/regressions.build
+CFLAGS+=-D_GNU_SOURCE

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