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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 <errno.h>
#include <sys/syscall.h>
#include <time.h>
#include <unistd.h>
#include "gtest/gtest.h"
#include "benchmark/benchmark.h"
#include "test/util/logging.h"
namespace gvisor {
namespace testing {
namespace {
// Sleep for 'param' nanoseconds.
void BM_Sleep(benchmark::State& state) {
const int nanoseconds = state.range(0);
for (auto _ : state) {
struct timespec ts;
ts.tv_sec = 0;
ts.tv_nsec = nanoseconds;
int ret;
do {
ret = syscall(SYS_nanosleep, &ts, &ts);
if (ret < 0) {
TEST_CHECK(errno == EINTR);
}
} while (ret < 0);
}
}
BENCHMARK(BM_Sleep)
->Arg(0)
->Arg(1)
->Arg(1000) // 1us
->Arg(1000 * 1000) // 1ms
->Arg(10 * 1000 * 1000) // 10ms
->Arg(50 * 1000 * 1000) // 50ms
->UseRealTime();
} // namespace
} // namespace testing
} // namespace gvisor
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