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//===-- BenchmarkResultTest.cpp ---------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "BenchmarkResult.h"
#include "X86InstrInfo.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/YAMLTraits.h"
#include "llvm/Support/raw_ostream.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
using ::testing::AllOf;
using ::testing::Eq;
using ::testing::Field;
using ::testing::Pointwise;
namespace llvm {
namespace exegesis {
void InitializeX86ExegesisTarget();
static std::string Dump(const MCInst &McInst) {
std::string Buffer;
raw_string_ostream OS(Buffer);
McInst.print(OS);
return Buffer;
}
MATCHER(EqMCInst, "") {
const std::string Lhs = Dump(get<0>(arg));
const std::string Rhs = Dump(get<1>(arg));
if (Lhs != Rhs) {
*result_listener << Lhs << " <=> " << Rhs;
return false;
}
return true;
}
MATCHER(EqRegValue, "") {
const RegisterValue Lhs = get<0>(arg);
const RegisterValue Rhs = get<1>(arg);
if (Lhs.Register != Rhs.Register || Lhs.Value != Rhs.Value)
return false;
return true;
}
namespace {
TEST(BenchmarkResultTest, WriteToAndReadFromDisk) {
LLVMInitializeX86TargetInfo();
LLVMInitializeX86Target();
LLVMInitializeX86TargetMC();
InitializeX86ExegesisTarget();
// Read benchmarks.
const LLVMState State =
cantFail(LLVMState::Create("x86_64-unknown-linux", "haswell"));
ExitOnError ExitOnErr;
Benchmark ToDisk;
ToDisk.Key.Instructions.push_back(MCInstBuilder(X86::XOR32rr)
.addReg(X86::AL)
.addReg(X86::AH)
.addImm(123)
.addDFPImm(bit_cast<uint64_t>(0.5)));
ToDisk.Key.Config = "config";
ToDisk.Key.RegisterInitialValues = {
RegisterValue{X86::AL, APInt(8, "-1", 10)},
RegisterValue{X86::AH, APInt(8, "123", 10)}};
ToDisk.Mode = Benchmark::Latency;
ToDisk.CpuName = "cpu_name";
ToDisk.LLVMTriple = "llvm_triple";
ToDisk.MinInstructions = 1;
ToDisk.Measurements.push_back(BenchmarkMeasure::Create("a", 1, {}));
ToDisk.Measurements.push_back(BenchmarkMeasure::Create("b", 2, {}));
ToDisk.Error = "error";
ToDisk.Info = "info";
SmallString<64> Filename;
std::error_code EC;
EC = sys::fs::createUniqueDirectory("BenchmarkResultTestDir", Filename);
ASSERT_FALSE(EC);
sys::path::append(Filename, "data.yaml");
errs() << Filename << "-------\n";
{
int ResultFD = 0;
// Create output file or open existing file and truncate it, once.
ExitOnErr(errorCodeToError(openFileForWrite(Filename, ResultFD,
sys::fs::CD_CreateAlways,
sys::fs::OF_TextWithCRLF)));
raw_fd_ostream FileOstr(ResultFD, true /*shouldClose*/);
ExitOnErr(ToDisk.writeYamlTo(State, FileOstr));
}
const std::unique_ptr<MemoryBuffer> Buffer =
std::move(*MemoryBuffer::getFile(Filename));
{
// Read Triples/Cpu only.
const auto TriplesAndCpus =
ExitOnErr(Benchmark::readTriplesAndCpusFromYamls(*Buffer));
ASSERT_THAT(TriplesAndCpus,
testing::ElementsAre(
AllOf(Field(&Benchmark::TripleAndCpu::LLVMTriple,
Eq("llvm_triple")),
Field(&Benchmark::TripleAndCpu::CpuName,
Eq("cpu_name")))));
}
{
// One-element version.
const auto FromDisk =
ExitOnErr(Benchmark::readYaml(State, *Buffer));
EXPECT_THAT(FromDisk.Key.Instructions,
Pointwise(EqMCInst(), ToDisk.Key.Instructions));
EXPECT_EQ(FromDisk.Key.Config, ToDisk.Key.Config);
EXPECT_THAT(FromDisk.Key.RegisterInitialValues,
Pointwise(EqRegValue(), ToDisk.Key.RegisterInitialValues));
EXPECT_EQ(FromDisk.Mode, ToDisk.Mode);
EXPECT_EQ(FromDisk.CpuName, ToDisk.CpuName);
EXPECT_EQ(FromDisk.LLVMTriple, ToDisk.LLVMTriple);
EXPECT_EQ(FromDisk.MinInstructions, ToDisk.MinInstructions);
EXPECT_THAT(FromDisk.Measurements, ToDisk.Measurements);
EXPECT_THAT(FromDisk.Error, ToDisk.Error);
EXPECT_EQ(FromDisk.Info, ToDisk.Info);
}
{
// Vector version.
const auto FromDiskVector =
ExitOnErr(Benchmark::readYamls(State, *Buffer));
ASSERT_EQ(FromDiskVector.size(), size_t{1});
const auto &FromDisk = FromDiskVector[0];
EXPECT_THAT(FromDisk.Key.Instructions,
Pointwise(EqMCInst(), ToDisk.Key.Instructions));
EXPECT_EQ(FromDisk.Key.Config, ToDisk.Key.Config);
EXPECT_THAT(FromDisk.Key.RegisterInitialValues,
Pointwise(EqRegValue(), ToDisk.Key.RegisterInitialValues));
EXPECT_EQ(FromDisk.Mode, ToDisk.Mode);
EXPECT_EQ(FromDisk.CpuName, ToDisk.CpuName);
EXPECT_EQ(FromDisk.LLVMTriple, ToDisk.LLVMTriple);
EXPECT_EQ(FromDisk.MinInstructions, ToDisk.MinInstructions);
EXPECT_THAT(FromDisk.Measurements, ToDisk.Measurements);
EXPECT_THAT(FromDisk.Error, ToDisk.Error);
EXPECT_EQ(FromDisk.Info, ToDisk.Info);
}
}
TEST(BenchmarkResultTest, PerInstructionStats) {
PerInstructionStats Stats;
Stats.push(BenchmarkMeasure::Create("a", 0.5, {}));
Stats.push(BenchmarkMeasure::Create("a", 1.5, {}));
Stats.push(BenchmarkMeasure::Create("a", -1.0, {}));
Stats.push(BenchmarkMeasure::Create("a", 0.0, {}));
EXPECT_EQ(Stats.min(), -1.0);
EXPECT_EQ(Stats.max(), 1.5);
EXPECT_EQ(Stats.avg(), 0.25); // (0.5+1.5-1.0+0.0) / 4
}
} // namespace
} // namespace exegesis
} // namespace llvm
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