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Added ability to disable huge pages in Zend Memeory Manager through the environment variable USE_ZEND_ALLOC_HUGE_PAGES=0.

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This commit is contained in:
Dmitry Stogov 2016-03-17 22:43:42 +03:00
parent 28b6f0232b
commit 945a661912
2 changed files with 13 additions and 1 deletions
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12
Zend/zend_alloc.c
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@ -200,6 +200,10 @@ typedef struct _zend_mm_huge_list zend_mm_huge_list;
# define PTR_FMT "0x%0.8lx"
#endif
#ifdef MAP_HUGETLB
int zend_mm_use_huge_pages = 1;
#endif
/*
* Memory is retrived from OS by chunks of fixed size 2MB.
* Inside chunk it's managed by pages of fixed size 4096B.
@ -462,7 +466,7 @@ static void *zend_mm_mmap(size_t size)
void *ptr;
#ifdef MAP_HUGETLB
if (size == ZEND_MM_CHUNK_SIZE) {
if (zend_mm_use_huge_pages && size == ZEND_MM_CHUNK_SIZE) {
ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON | MAP_HUGETLB, -1, 0);
if (ptr != MAP_FAILED) {
return ptr;
@ -2647,6 +2651,12 @@ static void alloc_globals_ctor(zend_alloc_globals *alloc_globals)
alloc_globals->mm_heap->custom_heap.std._realloc = realloc;
return;
}
#endif
#ifdef MAP_HUGETLB
tmp = getenv("USE_ZEND_ALLOC_HUGE_PAGES");
if (tmp && !zend_atoi(tmp, 0)) {
zend_mm_use_huge_pages = 0;
}
#endif
ZEND_TSRMLS_CACHE_UPDATE();
alloc_globals->mm_heap = zend_mm_init();