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Merge pull request #4388 from lioncash/written 

buffer_cache: Eliminate redundant map lookup in MarkRegionAsWritten()
This commit is contained in:
bunnei 2020-07-24 11:29:37 -07:00 committed by GitHub
parent f650cf8a9a 26c6c71837
commit d488cb843e
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 6 deletions
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9
src/video_core/buffer_cache/buffer_cache.h
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@ -524,11 +524,8 @@ private:
void MarkRegionAsWritten(VAddr start, VAddr end) { void MarkRegionAsWritten(VAddr start, VAddr end) {
const u64 page_end = end >> WRITE_PAGE_BIT; const u64 page_end = end >> WRITE_PAGE_BIT;
for (u64 page_start = start >> WRITE_PAGE_BIT; page_start <= page_end; ++page_start) { for (u64 page_start = start >> WRITE_PAGE_BIT; page_start <= page_end; ++page_start) {
auto it = written_pages.find(page_start); if (const auto [it, inserted] = written_pages.emplace(page_start, 1); !inserted) {
if (it != written_pages.end()) { ++it->second;
it->second = it->second + 1;
} else {
written_pages.insert_or_assign(page_start, 1);
} }
} }
} }
@ -539,7 +536,7 @@ private:
auto it = written_pages.find(page_start); auto it = written_pages.find(page_start);
if (it != written_pages.end()) { if (it != written_pages.end()) {
if (it->second > 1) { if (it->second > 1) {
it->second = it->second - 1; --it->second;
} else { } else {
written_pages.erase(it); written_pages.erase(it);
} }