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Merge pull request #4388 from lioncash/written
buffer_cache: Eliminate redundant map lookup in MarkRegionAsWritten()
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commit
d488cb843e
@ -524,11 +524,8 @@ private:
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void MarkRegionAsWritten(VAddr start, VAddr end) {
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const u64 page_end = end >> WRITE_PAGE_BIT;
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for (u64 page_start = start >> WRITE_PAGE_BIT; page_start <= page_end; ++page_start) {
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auto it = written_pages.find(page_start);
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if (it != written_pages.end()) {
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it->second = it->second + 1;
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} else {
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written_pages.insert_or_assign(page_start, 1);
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if (const auto [it, inserted] = written_pages.emplace(page_start, 1); !inserted) {
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++it->second;
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}
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}
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}
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@ -539,7 +536,7 @@ private:
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auto it = written_pages.find(page_start);
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if (it != written_pages.end()) {
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if (it->second > 1) {
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it->second = it->second - 1;
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--it->second;
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} else {
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written_pages.erase(it);
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}
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