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authorAlexandre Oliva <aoliva@redhat.com>2013-09-20 11:10:55 -0300
committerAlexandre Oliva <aoliva@redhat.com>2013-09-20 11:48:45 -0300
commit6999d38c953e568f0488572c0a68cba32286a2c3 (patch)
tree99a89852bc0690da122ed6795fae947ff38ce69b /malloc
parent0653427fdb5b70b8e1fc6189b0e7bdfc6ec920d6 (diff)
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Add probes for malloc arena changes.
for ChangeLog * malloc/arena.c (get_free_list): Add probe memory_arena_reuse_free_list. (reused_arena) [PER_THREAD]: Add probes memory_arena_reuse_wait and memory_arena_reuse. (arena_get2) [!PER_THREAD]: Likewise. * malloc/malloc.c (__libc_realloc) [!PER_THREAD]: Add probe memory_arena_reuse_realloc. * manual/probes.texi: Document them.
Diffstat (limited to 'malloc')
-rw-r--r--malloc/arena.c5
-rw-r--r--malloc/malloc.c1
2 files changed, 6 insertions, 0 deletions
diff --git a/malloc/arena.c b/malloc/arena.c
index 0822fc8..89e8b92 100644
--- a/malloc/arena.c
+++ b/malloc/arena.c
@@ -775,6 +775,7 @@ get_free_list (void)
if (result != NULL)
{
+ LIBC_PROBE (memory_arena_reuse_free_list, 1, result);
(void)mutex_lock(&result->mutex);
tsd_setspecific(arena_key, (void *)result);
THREAD_STAT(++(result->stat_lock_loop));
@@ -811,9 +812,11 @@ reused_arena (mstate avoid_arena)
result = result->next;
/* No arena available. Wait for the next in line. */
+ LIBC_PROBE (memory_arena_reuse_wait, 3, &result->mutex, result, avoid_arena);
(void)mutex_lock(&result->mutex);
out:
+ LIBC_PROBE (memory_arena_reuse, 2, result, avoid_arena);
tsd_setspecific(arena_key, (void *)result);
THREAD_STAT(++(result->stat_lock_loop));
next_to_use = result->next;
@@ -892,6 +895,7 @@ arena_get2(mstate a_tsd, size_t size, mstate avoid_arena)
if (retried)
(void)mutex_unlock(&list_lock);
THREAD_STAT(++(a->stat_lock_loop));
+ LIBC_PROBE (memory_arena_reuse, 2, a, a_tsd);
tsd_setspecific(arena_key, (void *)a);
return a;
}
@@ -904,6 +908,7 @@ arena_get2(mstate a_tsd, size_t size, mstate avoid_arena)
locks. */
if(!retried && mutex_trylock(&list_lock)) {
/* We will block to not run in a busy loop. */
+ LIBC_PROBE (memory_arena_reuse_wait, 3, &list_lock, NULL, a_tsd);
(void)mutex_lock(&list_lock);
/* Since we blocked there might be an arena available now. */
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 8f1ddf3..c5b3c7c 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -2977,6 +2977,7 @@ __libc_realloc(void* oldmem, size_t bytes)
#endif
#if !defined PER_THREAD
+ LIBC_PROBE (memory_arena_reuse_realloc, 1, ar_ptr);
/* As in malloc(), remember this arena for the next allocation. */
tsd_setspecific(arena_key, (void *)ar_ptr);
#endif