gperftools/Continue-to-release-span-until-the-end-of-one-round.patch
2022-01-11 19:44:59 +08:00

48 lines
1.6 KiB
Diff

From 18140cf69462a5036e46852707cadbed7156d3ca Mon Sep 17 00:00:00 2001
From: Qingqing Li <liqingqing3@huawei.com>
Date: Tue, 28 Dec 2021 08:51:54 +0800
Subject: [PATCH] Continue to release span until the end of one round. This is
also sync from the google/tcmalloc project.
upstream link: https://github.com/gperftools/gperftools/pull/1320
---
src/page_heap.cc | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/src/page_heap.cc b/src/page_heap.cc
index 44ad654..68c5416 100644
--- a/src/page_heap.cc
+++ b/src/page_heap.cc
@@ -483,11 +483,18 @@ Length PageHeap::ReleaseSpan(Span* s) {
Length PageHeap::ReleaseAtLeastNPages(Length num_pages) {
Length released_pages = 0;
+ Length prev_released_pages = 1;
// Round robin through the lists of free spans, releasing a
// span from each list. Stop after releasing at least num_pages
// or when there is nothing more to release.
while (released_pages < num_pages && stats_.free_bytes > 0) {
+ if (released_pages == prev_released_pages) {
+ // Last iteration of while loop made no progress.
+ break;
+ }
+ prev_released_pages = released_pages;
+
for (int i = 0; i < kMaxPages+1 && released_pages < num_pages;
i++, release_index_++) {
Span *s;
@@ -510,8 +517,6 @@ Length PageHeap::ReleaseAtLeastNPages(Length num_pages) {
// large freelist, should we carve s instead of releasing?
// the whole thing?
Length released_len = ReleaseSpan(s);
- // Some systems do not support release
- if (released_len == 0) return released_pages;
released_pages += released_len;
}
}
--
1.8.3.1