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[llvm-exegesis] Sum counter values when several counters are specified for a ProcRes.

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Summary: This allows handling memory ports on SNB.

Reviewers: gchatelet

Subscribers: tschuett, llvm-commits

Differential Revision: https://reviews.llvm.org/D48076

llvm-svn: 334502
This commit is contained in:
Clement Courbet 2018-06-12 13:28:37 +00:00
parent 3d6f625e55
commit e5b71bf1a2
1 changed files with 16 additions and 10 deletions
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26
tools/llvm-exegesis/lib/Uops.cpp
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@ -227,18 +227,24 @@ UopsBenchmarkRunner::runMeasurements(const ExecutableFunction &Function,
.PfmCounters.IssueCounters[ProcResIdx];
if (!PfmCounters)
continue;
// FIXME: Sum results when there are several counters for a single ProcRes
// We sum counts when there are several counters for a single ProcRes
// (e.g. P23 on SandyBridge).
pfm::PerfEvent UopPerfEvent(PfmCounters);
if (!UopPerfEvent.valid())
llvm::report_fatal_error(
llvm::Twine("invalid perf event ").concat(PfmCounters));
pfm::Counter Counter(UopPerfEvent);
Counter.start();
Function();
Counter.stop();
int64_t CounterValue = 0;
llvm::SmallVector<llvm::StringRef, 2> CounterNames;
llvm::StringRef(PfmCounters).split(CounterNames, ',');
for (const auto& CounterName : CounterNames) {
pfm::PerfEvent UopPerfEvent(CounterName);
if (!UopPerfEvent.valid())
llvm::report_fatal_error(
llvm::Twine("invalid perf event ").concat(PfmCounters));
pfm::Counter Counter(UopPerfEvent);
Counter.start();
Function();
Counter.stop();
CounterValue += Counter.read();
}
Result.push_back({llvm::itostr(ProcResIdx),
static_cast<double>(Counter.read()) / NumRepetitions,
static_cast<double>(CounterValue) / NumRepetitions,
SchedModel.getProcResource(ProcResIdx)->Name});
}
return Result;