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