Allocate and bind AIO user space buffers to the memory nodes
that mmap kernel buffers are bound to.
Signed-off-by: Alexey Budankov <alexey.budan...@linux.intel.com>
---
Changes in v4:
- fixed compilation issue converting pr_warn() to pr_warning()
- implemented stop if mbind() fails
Changes in v3:
- corrected code style issues
- adjusted __aio_alloc,__aio_bind,__aio_free() implementation
Changes in v2:
- implemented perf_mmap__aio_alloc, perf_mmap__aio_free, perf_mmap__aio_bind
and put HAVE_LIBNUMA_SUPPORT #ifdefs in there
---
tools/perf/util/mmap.c | 77 +++++++++++++++++++++++++++++++++++++++---
1 file changed, 73 insertions(+), 4 deletions(-)
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index e68ba754a8e2..34be9f900575 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -10,6 +10,9 @@
#include <sys/mman.h>
#include <inttypes.h>
#include <asm/bug.h>
+#ifdef HAVE_LIBNUMA_SUPPORT
+#include <numaif.h>
+#endif
#include "debug.h"
#include "event.h"
#include "mmap.h"
@@ -154,9 +157,72 @@ void __weak auxtrace_mmap_params__set_idx(struct
auxtrace_mmap_params *mp __mayb
}
#ifdef HAVE_AIO_SUPPORT
+
+#ifdef HAVE_LIBNUMA_SUPPORT
+static int perf_mmap__aio_alloc(struct perf_mmap *map, int index)
+{
+ map->aio.data[index] = mmap(NULL, perf_mmap__mmap_len(map),
PROT_READ|PROT_WRITE,
+ MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
+ if (map->aio.data[index] == MAP_FAILED) {
+ map->aio.data[index] = NULL;
+ return -1;
+ }
+
+ return 0;
+}
+
+static void perf_mmap__aio_free(struct perf_mmap *map, int index)
+{
+ if (map->aio.data[index]) {
+ munmap(map->aio.data[index], perf_mmap__mmap_len(map));
+ map->aio.data[index] = NULL;
+ }
+}
+
+static int perf_mmap__aio_bind(struct perf_mmap *map, int index, int cpu, int
affinity)
+{
+ void *data;
+ size_t mmap_len;
+ unsigned long node_mask;
+
+ if (affinity != PERF_AFFINITY_SYS && cpu__max_node() > 1) {
+ data = map->aio.data[index];
+ mmap_len = perf_mmap__mmap_len(map);
+ node_mask = 1UL << cpu__get_node(cpu);
+ if (mbind(data, mmap_len, MPOL_BIND, &node_mask, 1, 0)) {
+ pr_err("Failed to bind [%p-%p] AIO buffer to node %d:
error %m\n",
+ data, data + mmap_len, cpu__get_node(cpu));
+ return -1;
+ }
+ }
+
+ return 0;
+}
+#else
+static int perf_mmap__aio_alloc(struct perf_mmap *map, int index)
+{
+ map->aio.data[index] = malloc(perf_mmap__mmap_len(map));
+ if (map->aio.data[index] == NULL)
+ return -1;
+
+ return 0;
+}
+
+static void perf_mmap__aio_free(struct perf_mmap *map, int index)
+{
+ zfree(&(map->aio.data[index]));
+}
+
+static int perf_mmap__aio_bind(struct perf_mmap *map __maybe_unused, int index
__maybe_unused,
+ int cpu __maybe_unused, int affinity __maybe_unused)
+{
+ return 0;
+}
+#endif
+
static int perf_mmap__aio_mmap(struct perf_mmap *map, struct mmap_params *mp)
{
- int delta_max, i, prio;
+ int delta_max, i, prio, ret;
map->aio.nr_cblocks = mp->nr_cblocks;
if (map->aio.nr_cblocks) {
@@ -177,11 +243,14 @@ static int perf_mmap__aio_mmap(struct perf_mmap *map,
struct mmap_params *mp)
}
delta_max = sysconf(_SC_AIO_PRIO_DELTA_MAX);
for (i = 0; i < map->aio.nr_cblocks; ++i) {
- map->aio.data[i] = malloc(perf_mmap__mmap_len(map));
- if (!map->aio.data[i]) {
+ ret = perf_mmap__aio_alloc(map, i);
+ if (ret == -1) {
pr_debug2("failed to allocate data buffer area,
error %m");
return -1;
}
+ ret = perf_mmap__aio_bind(map, i, map->cpu,
mp->affinity);
+ if (ret == -1)
+ return -1;
/*
* Use cblock.aio_fildes value different from -1
* to denote started aio write operation on the
@@ -210,7 +279,7 @@ static void perf_mmap__aio_munmap(struct perf_mmap *map)
int i;
for (i = 0; i < map->aio.nr_cblocks; ++i)
- zfree(&map->aio.data[i]);
+ perf_mmap__aio_free(map, i);
if (map->aio.data)
zfree(&map->aio.data);
zfree(&map->aio.cblocks);
