[PATCH 06/12] perf tests: Move test__rdpmc into separate object
Separating test__rdpmc test from the builtin-test
into rdpmc object.
Signed-off-by: Jiri Olsa
Cc: Corey Ashford
Cc: Frederic Weisbecker
Cc: Ingo Molnar
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Arnaldo Carvalho de Melo
---
tools/perf/Makefile | 1 +
tools/perf/tests/builtin-test.c | 168 --
tools/perf/tests/rdpmc.c| 175
tools/perf/tests/tests.h| 1 +
4 files changed, 177 insertions(+), 168 deletions(-)
create mode 100644 tools/perf/tests/rdpmc.c
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index a2d6153..2e5197a 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -436,6 +436,7 @@ LIB_OBJS += $(OUTPUT)tests/open-syscall.o
LIB_OBJS += $(OUTPUT)tests/open-syscall-all-cpus.o
LIB_OBJS += $(OUTPUT)tests/mmap-basic.o
LIB_OBJS += $(OUTPUT)tests/perf-record.o
+LIB_OBJS += $(OUTPUT)tests/rdpmc.o
LIB_OBJS += $(OUTPUT)tests/util.o
BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 7cb3928..1e9a0ea 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -30,174 +30,6 @@
#include
-
-#if defined(__x86_64__) || defined(__i386__)
-
-#define barrier() asm volatile("" ::: "memory")
-
-static u64 rdpmc(unsigned int counter)
-{
- unsigned int low, high;
-
- asm volatile("rdpmc" : "=a" (low), "=d" (high) : "c" (counter));
-
- return low | ((u64)high) << 32;
-}
-
-static u64 rdtsc(void)
-{
- unsigned int low, high;
-
- asm volatile("rdtsc" : "=a" (low), "=d" (high));
-
- return low | ((u64)high) << 32;
-}
-
-static u64 mmap_read_self(void *addr)
-{
- struct perf_event_mmap_page *pc = addr;
- u32 seq, idx, time_mult = 0, time_shift = 0;
- u64 count, cyc = 0, time_offset = 0, enabled, running, delta;
-
- do {
- seq = pc->lock;
- barrier();
-
- enabled = pc->time_enabled;
- running = pc->time_running;
-
- if (enabled != running) {
- cyc = rdtsc();
- time_mult = pc->time_mult;
- time_shift = pc->time_shift;
- time_offset = pc->time_offset;
- }
-
- idx = pc->index;
- count = pc->offset;
- if (idx)
- count += rdpmc(idx - 1);
-
- barrier();
- } while (pc->lock != seq);
-
- if (enabled != running) {
- u64 quot, rem;
-
- quot = (cyc >> time_shift);
- rem = cyc & ((1 << time_shift) - 1);
- delta = time_offset + quot * time_mult +
- ((rem * time_mult) >> time_shift);
-
- enabled += delta;
- if (idx)
- running += delta;
-
- quot = count / running;
- rem = count % running;
- count = quot * enabled + (rem * enabled) / running;
- }
-
- return count;
-}
-
-/*
- * If the RDPMC instruction faults then signal this back to the test parent
task:
- */
-static void segfault_handler(int sig __maybe_unused,
-siginfo_t *info __maybe_unused,
-void *uc __maybe_unused)
-{
- exit(-1);
-}
-
-static int __test__rdpmc(void)
-{
- volatile int tmp = 0;
- u64 i, loops = 1000;
- int n;
- int fd;
- void *addr;
- struct perf_event_attr attr = {
- .type = PERF_TYPE_HARDWARE,
- .config = PERF_COUNT_HW_INSTRUCTIONS,
- .exclude_kernel = 1,
- };
- u64 delta_sum = 0;
-struct sigaction sa;
-
- sigfillset(_mask);
- sa.sa_sigaction = segfault_handler;
- sigaction(SIGSEGV, , NULL);
-
- fd = sys_perf_event_open(, 0, -1, -1, 0);
- if (fd < 0) {
- pr_err("Error: sys_perf_event_open() syscall returned "
- "with %d (%s)\n", fd, strerror(errno));
- return -1;
- }
-
- addr = mmap(NULL, page_size, PROT_READ, MAP_SHARED, fd, 0);
- if (addr == (void *)(-1)) {
- pr_err("Error: mmap() syscall returned with (%s)\n",
- strerror(errno));
- goto out_close;
- }
-
- for (n = 0; n < 6; n++) {
- u64 stamp, now, delta;
-
- stamp = mmap_read_self(addr);
-
- for (i = 0; i < loops; i++)
- tmp++;
-
- now = mmap_read_self(addr);
- loops *= 10;
-
- delta = now - stamp;
- pr_debug("%14d: %14Lu\n", n, (long long)delta);
-
- delta_sum += delta;
- }
-
- munmap(addr, page_size);
- pr_debug(" ");
-out_close:
- close(fd);
-
- if (!delta_sum)
- return -1;
-
-
[PATCH 06/12] perf tests: Move test__rdpmc into separate object
Separating test__rdpmc test from the builtin-test
into rdpmc object.
Signed-off-by: Jiri Olsa jo...@redhat.com
Cc: Corey Ashford cjash...@linux.vnet.ibm.com
Cc: Frederic Weisbecker fweis...@gmail.com
Cc: Ingo Molnar mi...@elte.hu
Cc: Paul Mackerras pau...@samba.org
Cc: Peter Zijlstra a.p.zijls...@chello.nl
Cc: Arnaldo Carvalho de Melo a...@redhat.com
---
tools/perf/Makefile | 1 +
tools/perf/tests/builtin-test.c | 168 --
tools/perf/tests/rdpmc.c| 175
tools/perf/tests/tests.h| 1 +
4 files changed, 177 insertions(+), 168 deletions(-)
create mode 100644 tools/perf/tests/rdpmc.c
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index a2d6153..2e5197a 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -436,6 +436,7 @@ LIB_OBJS += $(OUTPUT)tests/open-syscall.o
LIB_OBJS += $(OUTPUT)tests/open-syscall-all-cpus.o
LIB_OBJS += $(OUTPUT)tests/mmap-basic.o
LIB_OBJS += $(OUTPUT)tests/perf-record.o
+LIB_OBJS += $(OUTPUT)tests/rdpmc.o
LIB_OBJS += $(OUTPUT)tests/util.o
BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 7cb3928..1e9a0ea 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -30,174 +30,6 @@
#include sched.h
-
-#if defined(__x86_64__) || defined(__i386__)
-
-#define barrier() asm volatile( ::: memory)
-
-static u64 rdpmc(unsigned int counter)
-{
- unsigned int low, high;
-
- asm volatile(rdpmc : =a (low), =d (high) : c (counter));
-
- return low | ((u64)high) 32;
-}
-
-static u64 rdtsc(void)
-{
- unsigned int low, high;
-
- asm volatile(rdtsc : =a (low), =d (high));
-
- return low | ((u64)high) 32;
-}
-
-static u64 mmap_read_self(void *addr)
-{
- struct perf_event_mmap_page *pc = addr;
- u32 seq, idx, time_mult = 0, time_shift = 0;
- u64 count, cyc = 0, time_offset = 0, enabled, running, delta;
-
- do {
- seq = pc-lock;
- barrier();
-
- enabled = pc-time_enabled;
- running = pc-time_running;
-
- if (enabled != running) {
- cyc = rdtsc();
- time_mult = pc-time_mult;
- time_shift = pc-time_shift;
- time_offset = pc-time_offset;
- }
-
- idx = pc-index;
- count = pc-offset;
- if (idx)
- count += rdpmc(idx - 1);
-
- barrier();
- } while (pc-lock != seq);
-
- if (enabled != running) {
- u64 quot, rem;
-
- quot = (cyc time_shift);
- rem = cyc ((1 time_shift) - 1);
- delta = time_offset + quot * time_mult +
- ((rem * time_mult) time_shift);
-
- enabled += delta;
- if (idx)
- running += delta;
-
- quot = count / running;
- rem = count % running;
- count = quot * enabled + (rem * enabled) / running;
- }
-
- return count;
-}
-
-/*
- * If the RDPMC instruction faults then signal this back to the test parent
task:
- */
-static void segfault_handler(int sig __maybe_unused,
-siginfo_t *info __maybe_unused,
-void *uc __maybe_unused)
-{
- exit(-1);
-}
-
-static int __test__rdpmc(void)
-{
- volatile int tmp = 0;
- u64 i, loops = 1000;
- int n;
- int fd;
- void *addr;
- struct perf_event_attr attr = {
- .type = PERF_TYPE_HARDWARE,
- .config = PERF_COUNT_HW_INSTRUCTIONS,
- .exclude_kernel = 1,
- };
- u64 delta_sum = 0;
-struct sigaction sa;
-
- sigfillset(sa.sa_mask);
- sa.sa_sigaction = segfault_handler;
- sigaction(SIGSEGV, sa, NULL);
-
- fd = sys_perf_event_open(attr, 0, -1, -1, 0);
- if (fd 0) {
- pr_err(Error: sys_perf_event_open() syscall returned
- with %d (%s)\n, fd, strerror(errno));
- return -1;
- }
-
- addr = mmap(NULL, page_size, PROT_READ, MAP_SHARED, fd, 0);
- if (addr == (void *)(-1)) {
- pr_err(Error: mmap() syscall returned with (%s)\n,
- strerror(errno));
- goto out_close;
- }
-
- for (n = 0; n 6; n++) {
- u64 stamp, now, delta;
-
- stamp = mmap_read_self(addr);
-
- for (i = 0; i loops; i++)
- tmp++;
-
- now = mmap_read_self(addr);
- loops *= 10;
-
- delta = now - stamp;
- pr_debug(%14d: %14Lu\n, n, (long long)delta);
-
- delta_sum += delta;
- }
-
- munmap(addr, page_size);
- pr_debug( );
