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small optimizations, use bitwise aligne

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daan 2019-07-22 20:51:12 -07:00
parent 66b8c37ab3
commit 189ad0f81d
9 changed files with 59 additions and 32 deletions
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12
src/segment.c
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@ -235,8 +235,8 @@ static void mi_segment_os_free(mi_segment_t* segment, size_t segment_size, mi_se
// The thread local segment cache is limited to be at most 1/8 of the peak size of segments in use,
// and no more than 4.
#define MI_SEGMENT_CACHE_MAX (4)
// and no more than 2.
#define MI_SEGMENT_CACHE_MAX (2)
#define MI_SEGMENT_CACHE_FRACTION (8)
// note: returned segment may be partially reset
@ -252,7 +252,7 @@ static mi_segment_t* mi_segment_cache_pop(size_t segment_size, mi_segments_tld_t
}
static bool mi_segment_cache_full(mi_segments_tld_t* tld) {
if (tld->cache_count < MI_SEGMENT_CACHE_MAX &&
if (tld->cache_count < MI_SEGMENT_CACHE_MAX &&
tld->cache_count < (1 + (tld->peak_count / MI_SEGMENT_CACHE_FRACTION))) { // always allow 1 element cache
return false;
}
@ -318,7 +318,7 @@ static mi_segment_t* mi_segment_alloc(size_t required, mi_page_kind_t page_kind,
size_t page_size = (page_kind == MI_PAGE_HUGE ? segment_size : (size_t)1 << page_shift);
// Try to get it from our thread local cache first
bool commit = mi_option_is_enabled(mi_option_eager_commit) || (page_kind > MI_PAGE_MEDIUM);
bool commit = mi_option_is_enabled(mi_option_eager_commit) || (page_kind > MI_PAGE_MEDIUM);
bool protection_still_good = false;
mi_segment_t* segment = mi_segment_cache_pop(segment_size, tld);
if (segment != NULL) {
@ -702,10 +702,10 @@ static mi_page_t* mi_segment_huge_page_alloc(size_t size, mi_segments_tld_t* tld
mi_page_t* _mi_segment_page_alloc(size_t block_size, mi_segments_tld_t* tld, mi_os_tld_t* os_tld) {
mi_page_t* page;
if (block_size <= (MI_SMALL_PAGE_SIZE/16)*3) {
if (block_size <= (MI_SMALL_PAGE_SIZE/4)) {
page = mi_segment_small_page_alloc(tld,os_tld);
}
else if (block_size <= (MI_MEDIUM_PAGE_SIZE/16)*3) {
else if (block_size <= (MI_MEDIUM_PAGE_SIZE/4)) {
page = mi_segment_medium_page_alloc(tld, os_tld);
}
else if (block_size < (MI_LARGE_SIZE_MAX - sizeof(mi_segment_t))) {