forked from OSchip/llvm-project
[PSI] Add the isCold query support with a given percentile value.
Summary: This follows up D67377 that added the isHot side. Reviewers: davidxl Subscribers: eraman, hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D75283
This commit is contained in:
Hiroshi Yamauchi
parent
7e77cf473a
commit
4d6f3ee2ba
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@ -120,6 +120,11 @@ public:
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bool isFunctionHotInCallGraphNthPercentile(int PercentileCutoff,
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const Function *F,
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BlockFrequencyInfo &BFI);
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/// Returns true if \p F contains cold code with regard to a given cold
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/// percentile cutoff value.
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bool isFunctionColdInCallGraphNthPercentile(int PercentileCutoff,
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const Function *F,
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BlockFrequencyInfo &BFI);
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/// Returns true if count \p C is considered hot.
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bool isHotCount(uint64_t C);
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/// Returns true if count \p C is considered cold.
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@ -127,6 +132,9 @@ public:
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/// Returns true if count \p C is considered hot with regard to a given
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/// hot percentile cutoff value.
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bool isHotCountNthPercentile(int PercentileCutoff, uint64_t C);
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/// Returns true if count \p C is considered cold with regard to a given
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/// cold percentile cutoff value.
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bool isColdCountNthPercentile(int PercentileCutoff, uint64_t C);
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/// Returns true if BasicBlock \p BB is considered hot.
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bool isHotBlock(const BasicBlock *BB, BlockFrequencyInfo *BFI);
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/// Returns true if BasicBlock \p BB is considered cold.
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@ -135,6 +143,10 @@ public:
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/// hot percentile cutoff value.
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bool isHotBlockNthPercentile(int PercentileCutoff,
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const BasicBlock *BB, BlockFrequencyInfo *BFI);
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/// Returns true if BasicBlock \p BB is considered cold with regard to a given
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/// cold percentile cutoff value.
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bool isColdBlockNthPercentile(int PercentileCutoff,
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const BasicBlock *BB, BlockFrequencyInfo *BFI);
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/// Returns true if CallSite \p CS is considered hot.
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bool isHotCallSite(const CallSite &CS, BlockFrequencyInfo *BFI);
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/// Returns true if Callsite \p CS is considered cold.
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@ -153,6 +165,17 @@ public:
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uint64_t getColdCountThreshold() {
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return ColdCountThreshold ? ColdCountThreshold.getValue() : 0;
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}
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private:
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template<bool isHot>
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bool isFunctionHotOrColdInCallGraphNthPercentile(int PercentileCutoff,
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const Function *F,
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BlockFrequencyInfo &BFI);
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template<bool isHot>
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bool isHotOrColdCountNthPercentile(int PercentileCutoff, uint64_t C);
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template<bool isHot>
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bool isHotOrColdBlockNthPercentile(int PercentileCutoff, const BasicBlock *BB,
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BlockFrequencyInfo *BFI);
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};
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/// An analysis pass based on legacy pass manager to deliver ProfileSummaryInfo.
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@ -195,15 +195,19 @@ bool ProfileSummaryInfo::isFunctionColdInCallGraph(const Function *F,
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return true;
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}
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// Like isFunctionHotInCallGraph but for a given cutoff.
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bool ProfileSummaryInfo::isFunctionHotInCallGraphNthPercentile(
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template<bool isHot>
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bool ProfileSummaryInfo::isFunctionHotOrColdInCallGraphNthPercentile(
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int PercentileCutoff, const Function *F, BlockFrequencyInfo &BFI) {
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if (!F || !computeSummary())
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return false;
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if (auto FunctionCount = F->getEntryCount())
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if (isHotCountNthPercentile(PercentileCutoff, FunctionCount.getCount()))
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if (auto FunctionCount = F->getEntryCount()) {
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if (isHot &&
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isHotCountNthPercentile(PercentileCutoff, FunctionCount.getCount()))
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return true;
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if (!isHot &&
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!isColdCountNthPercentile(PercentileCutoff, FunctionCount.getCount()))
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return false;
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}
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if (hasSampleProfile()) {
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uint64_t TotalCallCount = 0;
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for (const auto &BB : *F)
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@ -211,13 +215,31 @@ bool ProfileSummaryInfo::isFunctionHotInCallGraphNthPercentile(
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if (isa<CallInst>(I) || isa<InvokeInst>(I))
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if (auto CallCount = getProfileCount(&I, nullptr))
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TotalCallCount += CallCount.getValue();
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if (isHotCountNthPercentile(PercentileCutoff, TotalCallCount))
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if (isHot && isHotCountNthPercentile(PercentileCutoff, TotalCallCount))
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return true;
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if (!isHot && !isColdCountNthPercentile(PercentileCutoff, TotalCallCount))
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return false;
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}
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for (const auto &BB : *F)
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if (isHotBlockNthPercentile(PercentileCutoff, &BB, &BFI))
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for (const auto &BB : *F) {
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if (isHot && isHotBlockNthPercentile(PercentileCutoff, &BB, &BFI))
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return true;
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return false;
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if (!isHot && !isColdBlockNthPercentile(PercentileCutoff, &BB, &BFI))
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return false;
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}
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return !isHot;
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}
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// Like isFunctionHotInCallGraph but for a given cutoff.
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bool ProfileSummaryInfo::isFunctionHotInCallGraphNthPercentile(
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int PercentileCutoff, const Function *F, BlockFrequencyInfo &BFI) {
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return isFunctionHotOrColdInCallGraphNthPercentile<true>(
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PercentileCutoff, F, BFI);
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}
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bool ProfileSummaryInfo::isFunctionColdInCallGraphNthPercentile(
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int PercentileCutoff, const Function *F, BlockFrequencyInfo &BFI) {
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return isFunctionHotOrColdInCallGraphNthPercentile<false>(
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PercentileCutoff, F, BFI);
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}
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/// Returns true if the function's entry is a cold. If it returns false, it
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@ -299,9 +321,22 @@ bool ProfileSummaryInfo::isColdCount(uint64_t C) {
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return ColdCountThreshold && C <= ColdCountThreshold.getValue();
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}
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bool ProfileSummaryInfo::isHotCountNthPercentile(int PercentileCutoff, uint64_t C) {
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template<bool isHot>
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bool ProfileSummaryInfo::isHotOrColdCountNthPercentile(int PercentileCutoff,
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uint64_t C) {
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auto CountThreshold = computeThreshold(PercentileCutoff);
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return CountThreshold && C >= CountThreshold.getValue();
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if (isHot)
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return CountThreshold && C >= CountThreshold.getValue();
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else
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return CountThreshold && C <= CountThreshold.getValue();
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}
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bool ProfileSummaryInfo::isHotCountNthPercentile(int PercentileCutoff, uint64_t C) {
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return isHotOrColdCountNthPercentile<true>(PercentileCutoff, C);
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}
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bool ProfileSummaryInfo::isColdCountNthPercentile(int PercentileCutoff, uint64_t C) {
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return isHotOrColdCountNthPercentile<false>(PercentileCutoff, C);
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}
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uint64_t ProfileSummaryInfo::getOrCompHotCountThreshold() {
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@ -327,11 +362,27 @@ bool ProfileSummaryInfo::isColdBlock(const BasicBlock *BB,
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return Count && isColdCount(*Count);
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}
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template<bool isHot>
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bool ProfileSummaryInfo::isHotOrColdBlockNthPercentile(int PercentileCutoff,
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const BasicBlock *BB,
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BlockFrequencyInfo *BFI) {
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auto Count = BFI->getBlockProfileCount(BB);
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if (isHot)
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return Count && isHotCountNthPercentile(PercentileCutoff, *Count);
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else
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return Count && isColdCountNthPercentile(PercentileCutoff, *Count);
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}
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bool ProfileSummaryInfo::isHotBlockNthPercentile(int PercentileCutoff,
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const BasicBlock *BB,
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BlockFrequencyInfo *BFI) {
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auto Count = BFI->getBlockProfileCount(BB);
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return Count && isHotCountNthPercentile(PercentileCutoff, *Count);
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return isHotOrColdBlockNthPercentile<true>(PercentileCutoff, BB, BFI);
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}
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bool ProfileSummaryInfo::isColdBlockNthPercentile(int PercentileCutoff,
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const BasicBlock *BB,
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BlockFrequencyInfo *BFI) {
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return isHotOrColdBlockNthPercentile<false>(PercentileCutoff, BB, BFI);
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}
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bool ProfileSummaryInfo::isHotCallSite(const CallSite &CS,
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@ -65,6 +65,20 @@ protected:
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" %y2 = phi i32 [0, %bb1], [1, %bb2] \n"
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" ret i32 %y2\n"
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"}\n"
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"define i32 @l(i32 %x) {{\n"
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"bb0:\n"
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" %y1 = icmp eq i32 %x, 0 \n"
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" br i1 %y1, label %bb1, label %bb2, !prof !23 \n"
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"bb1:\n"
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" %z1 = call i32 @g(i32 %x)\n"
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" br label %bb3\n"
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"bb2:\n"
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" %z2 = call i32 @h(i32 %x)\n"
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" br label %bb3\n"
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"bb3:\n"
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" %y2 = phi i32 [0, %bb1], [1, %bb2] \n"
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" ret i32 %y2\n"
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"}\n"
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"!20 = !{{!\"function_entry_count\", i64 400}\n"
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"!21 = !{{!\"function_entry_count\", i64 1}\n"
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"!22 = !{{!\"function_entry_count\", i64 100}\n"
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@ -141,14 +155,26 @@ TEST_F(ProfileSummaryInfoTest, TestCommon) {
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EXPECT_FALSE(PSI.isHotCountNthPercentile(990000, 100));
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EXPECT_FALSE(PSI.isHotCountNthPercentile(990000, 2));
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EXPECT_FALSE(PSI.isColdCountNthPercentile(990000, 400));
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EXPECT_TRUE(PSI.isColdCountNthPercentile(990000, 100));
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EXPECT_TRUE(PSI.isColdCountNthPercentile(990000, 2));
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EXPECT_TRUE(PSI.isHotCountNthPercentile(999999, 400));
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EXPECT_TRUE(PSI.isHotCountNthPercentile(999999, 100));
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EXPECT_FALSE(PSI.isHotCountNthPercentile(999999, 2));
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EXPECT_FALSE(PSI.isColdCountNthPercentile(999999, 400));
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EXPECT_FALSE(PSI.isColdCountNthPercentile(999999, 100));
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EXPECT_TRUE(PSI.isColdCountNthPercentile(999999, 2));
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EXPECT_FALSE(PSI.isHotCountNthPercentile(10000, 400));
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EXPECT_FALSE(PSI.isHotCountNthPercentile(10000, 100));
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EXPECT_FALSE(PSI.isHotCountNthPercentile(10000, 2));
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EXPECT_TRUE(PSI.isColdCountNthPercentile(10000, 400));
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EXPECT_TRUE(PSI.isColdCountNthPercentile(10000, 100));
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EXPECT_TRUE(PSI.isColdCountNthPercentile(10000, 2));
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EXPECT_TRUE(PSI.isFunctionEntryHot(F));
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EXPECT_FALSE(PSI.isFunctionEntryHot(G));
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EXPECT_FALSE(PSI.isFunctionEntryHot(H));
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@ -177,16 +203,31 @@ TEST_F(ProfileSummaryInfoTest, InstrProf) {
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(990000, BB3, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB1, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB3, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, &BB0, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, BB1, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, BB2, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, BB3, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, &BB0, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, BB1, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, BB2, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, BB3, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, BB1, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, BB2, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, BB3, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, &BB0, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, BB1, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, BB2, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, BB3, &BFI));
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CallSite CS1(BB1->getFirstNonPHI());
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auto *CI2 = BB2->getFirstNonPHI();
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CallSite CS2(CI2);
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@ -201,6 +242,31 @@ TEST_F(ProfileSummaryInfoTest, InstrProf) {
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EXPECT_FALSE(PSI.isHotCallSite(CS2, &BFI));
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}
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TEST_F(ProfileSummaryInfoTest, InstrProfNoFuncEntryCount) {
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auto M = makeLLVMModule("InstrProf");
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Function *F = M->getFunction("l");
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ProfileSummaryInfo PSI = buildPSI(M.get());
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EXPECT_TRUE(PSI.hasProfileSummary());
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EXPECT_TRUE(PSI.hasInstrumentationProfile());
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BasicBlock &BB0 = F->getEntryBlock();
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BasicBlock *BB1 = BB0.getTerminator()->getSuccessor(0);
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BasicBlock *BB2 = BB0.getTerminator()->getSuccessor(1);
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BasicBlock *BB3 = BB1->getSingleSuccessor();
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BlockFrequencyInfo BFI = buildBFI(*F);
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// Without the entry count, all should return false.
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB1, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB3, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB1, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB3, &BFI));
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}
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TEST_F(ProfileSummaryInfoTest, SampleProf) {
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auto M = makeLLVMModule("SampleProfile");
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Function *F = M->getFunction("f");
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@ -224,16 +290,31 @@ TEST_F(ProfileSummaryInfoTest, SampleProf) {
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(990000, BB3, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB1, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB3, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, &BB0, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, BB1, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, BB2, &BFI));
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EXPECT_TRUE(PSI.isHotBlockNthPercentile(999900, BB3, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, &BB0, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, BB1, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, BB2, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(999900, BB3, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, BB1, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, BB2, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(10000, BB3, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, &BB0, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, BB1, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, BB2, &BFI));
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EXPECT_TRUE(PSI.isColdBlockNthPercentile(10000, BB3, &BFI));
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CallSite CS1(BB1->getFirstNonPHI());
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auto *CI2 = BB2->getFirstNonPHI();
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// Manually attach branch weights metadata to the call instruction.
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@ -250,6 +331,51 @@ TEST_F(ProfileSummaryInfoTest, SampleProf) {
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// weights that exceed the hot count threshold.
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CI2->setMetadata(llvm::LLVMContext::MD_prof, MDB.createBranchWeights({400}));
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EXPECT_TRUE(PSI.isHotCallSite(CS2, &BFI));
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{
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Function *F = M->getFunction("l");
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BlockFrequencyInfo BFI = buildBFI(*F);
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BasicBlock &BB0 = F->getEntryBlock();
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BasicBlock *BB1 = BB0.getTerminator()->getSuccessor(0);
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BasicBlock *BB2 = BB0.getTerminator()->getSuccessor(1);
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BasicBlock *BB3 = BB1->getSingleSuccessor();
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// Without the entry count, all should return false.
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB1, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB3, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB1, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB3, &BFI));
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}
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}
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TEST_F(ProfileSummaryInfoTest, SampleProfNoFuncEntryCount) {
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auto M = makeLLVMModule("SampleProfile");
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Function *F = M->getFunction("l");
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ProfileSummaryInfo PSI = buildPSI(M.get());
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EXPECT_TRUE(PSI.hasProfileSummary());
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EXPECT_TRUE(PSI.hasSampleProfile());
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BasicBlock &BB0 = F->getEntryBlock();
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BasicBlock *BB1 = BB0.getTerminator()->getSuccessor(0);
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BasicBlock *BB2 = BB0.getTerminator()->getSuccessor(1);
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BasicBlock *BB3 = BB1->getSingleSuccessor();
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BlockFrequencyInfo BFI = buildBFI(*F);
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// Without the entry count, all should return false.
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, &BB0, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB1, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB2, &BFI));
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EXPECT_FALSE(PSI.isHotBlockNthPercentile(990000, BB3, &BFI));
|
||||
EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, &BB0, &BFI));
|
||||
EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB1, &BFI));
|
||||
EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB2, &BFI));
|
||||
EXPECT_FALSE(PSI.isColdBlockNthPercentile(990000, BB3, &BFI));
|
||||
}
|
||||
|
||||
} // end anonymous namespace
|
||||
|
|
|
|||
Loading…
Reference in New Issue