mirror of
https://github.com/netbirdio/gvisor.git
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Ghanan Gowripalan
07b9077bfd
This benchmark performs similar measurements as epoll_benchmark. PiperOrigin-RevId: 571414062
81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
// Copyright 2023 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 <sys/poll.h>
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#include <cstdint>
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#include <utility>
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#include <vector>
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include "benchmark/benchmark.h"
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#include "test/util/eventfd_util.h"
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#include "test/util/file_descriptor.h"
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#include "test/util/posix_error.h"
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#include "test/util/test_util.h"
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namespace gvisor {
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namespace testing {
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namespace {
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void Setup(int count, std::vector<FileDescriptor>& event_fds,
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std::vector<pollfd>& poll_fds) {
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for (int i = 0; i < count; ++i) {
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FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(NewEventFD());
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poll_fds.push_back(pollfd{.fd = fd.get(), .events = POLLIN});
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event_fds.push_back(std::move(fd));
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}
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}
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void BM_PollTimeout(benchmark::State& state) {
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constexpr int kFDsPerPoll = 3;
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std::vector<FileDescriptor> event_fds;
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std::vector<pollfd> poll_fds;
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ASSERT_NO_FATAL_FAILURE(Setup(kFDsPerPoll, event_fds, poll_fds));
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const int timeout_ms = state.range(0);
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for (auto _ : state) {
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EXPECT_EQ(poll(poll_fds.data(), poll_fds.size(), timeout_ms), 0);
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}
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}
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BENCHMARK(BM_PollTimeout)->Range(/*start=*/0, /*limit=*/8);
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void BM_PollAllEvents(benchmark::State& state) {
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const int fds_per_poll = state.range(0);
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std::vector<FileDescriptor> event_fds;
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std::vector<pollfd> poll_fds;
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ASSERT_NO_FATAL_FAILURE(Setup(fds_per_poll, event_fds, poll_fds));
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constexpr uint64_t kEventVal = 5;
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for (const auto& eventfd : event_fds) {
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ASSERT_THAT(WriteFd(eventfd.get(), &kEventVal, sizeof(kEventVal)),
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SyscallSucceedsWithValue(sizeof(kEventVal)));
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}
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constexpr int kTimeoutMs = 0;
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for (auto _ : state) {
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EXPECT_EQ(poll(poll_fds.data(), poll_fds.size(), kTimeoutMs), fds_per_poll);
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}
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}
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BENCHMARK(BM_PollAllEvents)->Range(/*start=*/2, /*limit=*/1024);
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} // namespace
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} // namespace testing
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} // namespace gvisor
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