llvm/tools/llvm-exegesis/lib/UopsBenchmarkRunner.cpp

   1 //===-- UopsBenchmarkRunner.cpp ---------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "UopsBenchmarkRunner.h"
  10
  11 #include "Target.h"
  12
  13 namespace llvm {
  14 namespace exegesis {
  15
  16 UopsBenchmarkRunner::~UopsBenchmarkRunner() = default;
  17
  18 Expected<std::vector<BenchmarkMeasure>>
  19 UopsBenchmarkRunner::runMeasurements(const FunctionExecutor &Executor) const {
  20   std::vector<BenchmarkMeasure> Result;
  21   const PfmCountersInfo &PCI = State.getPfmCounters();
  22   // Uops per port.
  23   for (const auto *IssueCounter = PCI.IssueCounters,
  24                   *IssueCounterEnd = PCI.IssueCounters + PCI.NumIssueCounters;
  25        IssueCounter != IssueCounterEnd; ++IssueCounter) {
  26     if (!IssueCounter->Counter)
  27       continue;
  28     auto ExpectedCounterValue = Executor.runAndSample(IssueCounter->Counter);
  29     if (!ExpectedCounterValue)
  30       return ExpectedCounterValue.takeError();
  31     Result.push_back(BenchmarkMeasure::Create(IssueCounter->ProcResName,
  32                                               (*ExpectedCounterValue)[0]));
  33   }
  34   // NumMicroOps.
  35   if (const char *const UopsCounter = PCI.UopsCounter) {
  36     auto ExpectedCounterValue = Executor.runAndSample(UopsCounter);
  37     if (!ExpectedCounterValue)
  38       return ExpectedCounterValue.takeError();
  39     Result.push_back(
  40         BenchmarkMeasure::Create("NumMicroOps", (*ExpectedCounterValue)[0]));
  41   }
  42   return std::move(Result);
  43 }
  44
  45 } // namespace exegesis
  46 } // namespace llvm