100 lines
2.8 KiB
C++
100 lines
2.8 KiB
C++
// 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 <sys/epoll.h>
|
|
#include <sys/eventfd.h>
|
|
|
|
#include <atomic>
|
|
#include <cerrno>
|
|
#include <cstdint>
|
|
#include <cstdlib>
|
|
#include <ctime>
|
|
#include <memory>
|
|
|
|
#include "gtest/gtest.h"
|
|
#include "absl/time/time.h"
|
|
#include "benchmark/benchmark.h"
|
|
#include "test/util/epoll_util.h"
|
|
#include "test/util/file_descriptor.h"
|
|
#include "test/util/test_util.h"
|
|
#include "test/util/thread_util.h"
|
|
|
|
namespace gvisor {
|
|
namespace testing {
|
|
|
|
namespace {
|
|
|
|
// Returns a new eventfd.
|
|
PosixErrorOr<FileDescriptor> NewEventFD() {
|
|
int fd = eventfd(0, /* flags = */ 0);
|
|
MaybeSave();
|
|
if (fd < 0) {
|
|
return PosixError(errno, "eventfd");
|
|
}
|
|
return FileDescriptor(fd);
|
|
}
|
|
|
|
// Also stolen from epoll.cc unit tests.
|
|
void BM_EpollTimeout(benchmark::State& state) {
|
|
constexpr int kFDsPerEpoll = 3;
|
|
auto epollfd = ASSERT_NO_ERRNO_AND_VALUE(NewEpollFD());
|
|
|
|
std::vector<FileDescriptor> eventfds;
|
|
for (int i = 0; i < kFDsPerEpoll; i++) {
|
|
eventfds.push_back(ASSERT_NO_ERRNO_AND_VALUE(NewEventFD()));
|
|
ASSERT_NO_ERRNO(
|
|
RegisterEpollFD(epollfd.get(), eventfds[i].get(), EPOLLIN, 0));
|
|
}
|
|
|
|
struct epoll_event result[kFDsPerEpoll];
|
|
int timeout_ms = state.range(0);
|
|
|
|
for (auto _ : state) {
|
|
EXPECT_EQ(0, epoll_wait(epollfd.get(), result, kFDsPerEpoll, timeout_ms));
|
|
}
|
|
}
|
|
|
|
BENCHMARK(BM_EpollTimeout)->Range(0, 8);
|
|
|
|
// Also stolen from epoll.cc unit tests.
|
|
void BM_EpollAllEvents(benchmark::State& state) {
|
|
auto epollfd = ASSERT_NO_ERRNO_AND_VALUE(NewEpollFD());
|
|
const int fds_per_epoll = state.range(0);
|
|
constexpr uint64_t kEventVal = 5;
|
|
|
|
std::vector<FileDescriptor> eventfds;
|
|
for (int i = 0; i < fds_per_epoll; i++) {
|
|
eventfds.push_back(ASSERT_NO_ERRNO_AND_VALUE(NewEventFD()));
|
|
ASSERT_NO_ERRNO(
|
|
RegisterEpollFD(epollfd.get(), eventfds[i].get(), EPOLLIN, 0));
|
|
|
|
ASSERT_THAT(WriteFd(eventfds[i].get(), &kEventVal, sizeof(kEventVal)),
|
|
SyscallSucceedsWithValue(sizeof(kEventVal)));
|
|
}
|
|
|
|
std::vector<struct epoll_event> result(fds_per_epoll);
|
|
|
|
for (auto _ : state) {
|
|
EXPECT_EQ(fds_per_epoll,
|
|
epoll_wait(epollfd.get(), result.data(), fds_per_epoll, 0));
|
|
}
|
|
}
|
|
|
|
BENCHMARK(BM_EpollAllEvents)->Range(2, 1024);
|
|
|
|
} // namespace
|
|
|
|
} // namespace testing
|
|
} // namespace gvisor
|