project-base/server-skynet-source-3rd-jemalloc
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Use regular arena allocation for huge tree nodes.

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This avoids grabbing the base mutex, as a step towards fine-grained
locking for huge allocations. The thread cache also provides a tiny
(~3%) improvement for serial huge allocations.
This commit is contained in:
Daniel Micay
2014-10-06 03:42:10 -04:00
committed by Jason Evans
parent 8bb3198f72
commit f22214a29d
5 changed files with 29 additions and 15 deletions
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27
test/unit/junk.c
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@@ -8,7 +8,16 @@ const char *malloc_conf =
static arena_dalloc_junk_small_t *arena_dalloc_junk_small_orig;
static arena_dalloc_junk_large_t *arena_dalloc_junk_large_orig;
static huge_dalloc_junk_t *huge_dalloc_junk_orig;
static void *most_recently_junked;
static void *watch_for_junking;
static bool saw_junking;
static void
watch_junking(void *p)
{
watch_for_junking = p;
saw_junking = false;
}
static void
arena_dalloc_junk_small_intercept(void *ptr, arena_bin_info_t *bin_info)
@@ -21,7 +30,8 @@ arena_dalloc_junk_small_intercept(void *ptr, arena_bin_info_t *bin_info)
"Missing junk fill for byte %zu/%zu of deallocated region",
i, bin_info->reg_size);
}
most_recently_junked = ptr;
if (ptr == watch_for_junking)
saw_junking = true;
}
static void
@@ -35,7 +45,8 @@ arena_dalloc_junk_large_intercept(void *ptr, size_t usize)
"Missing junk fill for byte %zu/%zu of deallocated region",
i, usize);
}
most_recently_junked = ptr;
if (ptr == watch_for_junking)
saw_junking = true;
}
static void
@@ -48,7 +59,8 @@ huge_dalloc_junk_intercept(void *ptr, size_t usize)
* enough that it doesn't make sense to duplicate the decision logic in
* test code, so don't actually check that the region is junk-filled.
*/
most_recently_junked = ptr;
if (ptr == watch_for_junking)
saw_junking = true;
}
static void
@@ -87,18 +99,19 @@ test_junk(size_t sz_min, size_t sz_max)
}
if (xallocx(s, sz+1, 0, 0) == sz) {
void *junked = (void *)s;
watch_junking(s);
s = (char *)rallocx(s, sz+1, 0);
assert_ptr_not_null((void *)s,
"Unexpected rallocx() failure");
assert_ptr_eq(most_recently_junked, junked,
assert_true(saw_junking,
"Expected region of size %zu to be junk-filled",
sz);
}
}
watch_junking(s);
dallocx(s, 0);
assert_ptr_eq(most_recently_junked, (void *)s,
assert_true(saw_junking,
"Expected region of size %zu to be junk-filled", sz);
arena_dalloc_junk_small = arena_dalloc_junk_small_orig;