romenskiy2012/jemalloc
1
0
Fork 0
mirror of https://github.com/jemalloc/jemalloc.git synced 2026-07-22 16:47:21 +03:00
Code Issues Projects Releases Packages Wiki Activity

Try to decommit new chunks.

Browse source 
Always leave decommit disabled on non-Windows systems.
This commit is contained in:
Jason Evans 2015-08-12 10:26:54 -07:00
parent 1f27abc1b1
commit 03bf5b67be
4 changed files with 27 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

3
src/chunk_dss.c
View file

@ -145,7 +145,8 @@ chunk_alloc_dss(arena_t *arena, void *new_addr, size_t size, size_t alignment,
ret, size);
memset(ret, 0, size);
}
*commit = true;
if (!*commit)
*commit = pages_decommit(ret, size);
return (ret);
}
} while (dss_prev != (void *)-1);

6
src/chunk_mmap.c
View file

@ -24,7 +24,8 @@ chunk_alloc_mmap_slow(size_t size, size_t alignment, bool *zero, bool *commit)
assert(ret != NULL);
*zero = true;
*commit = true;
if (!*commit)
*commit = pages_decommit(ret, size);
return (ret);
}
@ -61,7 +62,8 @@ chunk_alloc_mmap(size_t size, size_t alignment, bool *zero, bool *commit)
assert(ret != NULL);
*zero = true;
*commit = true;
if (!*commit)
*commit = pages_decommit(ret, size);
return (ret);
}

8
src/pages.c
View file

@ -102,7 +102,13 @@ pages_commit_impl(void *addr, size_t size, bool commit)
{
#ifndef _WIN32
if (config_debug) {
/*
* The following decommit/commit implementation is functional, but
* always disabled because it doesn't add value beyong improved
* debugging (at the cost of extra system calls) on systems that
* overcommit.
*/
if (false) {
int prot = commit ? (PROT_READ | PROT_WRITE) : PROT_NONE;
void *result = mmap(addr, size, prot, MAP_PRIVATE | MAP_ANON |
MAP_FIXED, -1, 0);