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// Copyright 2020 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <time.h>
#include "gtest/gtest.h"
#include "benchmark/benchmark.h"
namespace gvisor {
namespace testing {
namespace {
// clock_getres(1) is very nearly a no-op syscall, but it does require copying
// out to a userspace struct. It thus provides a nice small copy-out benchmark.
void BM_ClockGetRes(benchmark::State& state) {
struct timespec ts;
for (auto _ : state) {
clock_getres(CLOCK_MONOTONIC, &ts);
}
}
BENCHMARK(BM_ClockGetRes);
} // namespace
} // namespace testing
} // namespace gvisor
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