forked from OSchip/llvm-project
107 lines
3.2 KiB
C++
107 lines
3.2 KiB
C++
//===-- Benchmark Memory Test ---------------------------------------------===//
|
|
//
|
|
// 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 "LibcMemoryBenchmark.h"
|
|
#include "llvm/Support/Alignment.h"
|
|
#include "gmock/gmock.h"
|
|
#include "gtest/gtest.h"
|
|
|
|
using testing::AllOf;
|
|
using testing::AnyOf;
|
|
using testing::ElementsAre;
|
|
using testing::Ge;
|
|
using testing::Gt;
|
|
using testing::Le;
|
|
using testing::Lt;
|
|
|
|
namespace llvm {
|
|
namespace libc_benchmarks {
|
|
namespace {
|
|
|
|
TEST(AlignedBuffer, IsAligned) {
|
|
AlignedBuffer AB(0);
|
|
EXPECT_TRUE(isAddrAligned(Align(AlignedBuffer::Alignment), AB.begin()));
|
|
}
|
|
|
|
TEST(AlignedBuffer, Empty) {
|
|
AlignedBuffer AB(0);
|
|
EXPECT_EQ(std::distance(AB.begin(), AB.end()), 0U);
|
|
}
|
|
|
|
TEST(OffsetDistribution, AlignToBegin) {
|
|
const size_t BufferSize = 8192;
|
|
OffsetDistribution OD(BufferSize, 1024, None);
|
|
std::default_random_engine Gen;
|
|
for (size_t I = 0; I <= 10; ++I)
|
|
EXPECT_EQ(OD(Gen), 0U);
|
|
}
|
|
|
|
TEST(OffsetDistribution, NoAlignment) {
|
|
const size_t BufferSize = 8192;
|
|
OffsetDistribution OD(BufferSize, 1, Align(1));
|
|
std::default_random_engine Gen;
|
|
for (size_t I = 0; I <= 10; ++I)
|
|
EXPECT_THAT(OD(Gen), AllOf(Ge(0U), Lt(8192U)));
|
|
}
|
|
|
|
MATCHER_P(IsDivisibleBy, n, "") {
|
|
*result_listener << "where the remainder is " << (arg % n);
|
|
return (arg % n) == 0;
|
|
}
|
|
|
|
TEST(OffsetDistribution, Aligned) {
|
|
const size_t BufferSize = 8192;
|
|
OffsetDistribution OD(BufferSize, 1, Align(16));
|
|
std::default_random_engine Gen;
|
|
for (size_t I = 0; I <= 10; ++I)
|
|
EXPECT_THAT(OD(Gen), AllOf(Ge(0U), Lt(8192U), IsDivisibleBy(16U)));
|
|
}
|
|
|
|
TEST(MismatchOffsetDistribution, EqualBufferDisablesDistribution) {
|
|
const size_t BufferSize = 8192;
|
|
const uint32_t MismatchAt = 0; // buffer are equal.
|
|
|
|
MismatchOffsetDistribution MOD(BufferSize, 1024, MismatchAt);
|
|
EXPECT_FALSE(MOD);
|
|
}
|
|
|
|
TEST(MismatchOffsetDistribution, DifferentBufferDisablesDistribution) {
|
|
const size_t BufferSize = 8192;
|
|
const uint32_t MismatchAt = 1; // buffer are different.
|
|
|
|
MismatchOffsetDistribution MOD(BufferSize, 1024, MismatchAt);
|
|
EXPECT_FALSE(MOD);
|
|
}
|
|
|
|
TEST(MismatchOffsetDistribution, MismatchAt2) {
|
|
const size_t BufferSize = 16;
|
|
const uint32_t MismatchAt = 2; // buffer are different at position 2.
|
|
const uint32_t MaxSize = 4;
|
|
|
|
MismatchOffsetDistribution MOD(BufferSize, MaxSize, MismatchAt);
|
|
EXPECT_TRUE(MOD);
|
|
// We test equality up to MaxSize (=4) so we need spans of 4 equal bytes
|
|
// spaced by one mismatch.
|
|
EXPECT_THAT(MOD.getMismatchIndices(), ElementsAre(5, 9, 13));
|
|
std::default_random_engine Gen;
|
|
for (size_t Iterations = 0; Iterations <= 10; ++Iterations) {
|
|
for (size_t Size = 0; Size <= MaxSize; ++Size) {
|
|
if (Size >= MismatchAt)
|
|
EXPECT_THAT(MOD(Gen, Size),
|
|
AnyOf(5 - MismatchAt, 9 - MismatchAt, 13 - MismatchAt));
|
|
else
|
|
EXPECT_THAT(MOD(Gen, Size),
|
|
AnyOf(5 - Size - 1, 9 - Size - 1, 13 - Size - 1));
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace
|
|
} // namespace libc_benchmarks
|
|
} // namespace llvm
|