| /* |
| * |
| * Copyright 2017 gRPC 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. |
| * |
| */ |
| |
| /* Test out pollset latencies */ |
| |
| #include <grpc/grpc.h> |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/useful.h> |
| |
| #include "src/core/lib/iomgr/ev_posix.h" |
| #include "src/core/lib/iomgr/pollset.h" |
| #include "src/core/lib/iomgr/port.h" |
| #include "src/core/lib/iomgr/wakeup_fd_posix.h" |
| |
| #include "test/cpp/microbenchmarks/helpers.h" |
| #include "third_party/benchmark/include/benchmark/benchmark.h" |
| |
| #include <string.h> |
| |
| #ifdef GRPC_LINUX_MULTIPOLL_WITH_EPOLL |
| #include <sys/epoll.h> |
| #include <sys/eventfd.h> |
| #include <unistd.h> |
| #endif |
| |
| auto& force_library_initialization = Library::get(); |
| |
| static void shutdown_ps(grpc_exec_ctx* exec_ctx, void* ps, grpc_error* error) { |
| grpc_pollset_destroy(exec_ctx, static_cast<grpc_pollset*>(ps)); |
| } |
| |
| static void BM_CreateDestroyPollset(benchmark::State& state) { |
| TrackCounters track_counters; |
| size_t ps_sz = grpc_pollset_size(); |
| grpc_pollset* ps = static_cast<grpc_pollset*>(gpr_malloc(ps_sz)); |
| gpr_mu* mu; |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| grpc_closure shutdown_ps_closure; |
| GRPC_CLOSURE_INIT(&shutdown_ps_closure, shutdown_ps, ps, |
| grpc_schedule_on_exec_ctx); |
| while (state.KeepRunning()) { |
| memset(ps, 0, ps_sz); |
| grpc_pollset_init(ps, &mu); |
| gpr_mu_lock(mu); |
| grpc_pollset_shutdown(&exec_ctx, ps, &shutdown_ps_closure); |
| gpr_mu_unlock(mu); |
| grpc_exec_ctx_flush(&exec_ctx); |
| } |
| grpc_exec_ctx_finish(&exec_ctx); |
| gpr_free(ps); |
| track_counters.Finish(state); |
| } |
| BENCHMARK(BM_CreateDestroyPollset); |
| |
| #ifdef GRPC_LINUX_MULTIPOLL_WITH_EPOLL |
| static void BM_PollEmptyPollset_SpeedOfLight(benchmark::State& state) { |
| // equivalent to BM_PollEmptyPollset, but just use the OS primitives to guage |
| // what the speed of light would be if we abstracted perfectly |
| TrackCounters track_counters; |
| int epfd = epoll_create1(0); |
| GPR_ASSERT(epfd != -1); |
| size_t nev = state.range(0); |
| size_t nfd = state.range(1); |
| epoll_event* ev = new epoll_event[nev]; |
| std::vector<int> fds; |
| for (size_t i = 0; i < nfd; i++) { |
| fds.push_back(eventfd(0, 0)); |
| epoll_event ev; |
| ev.events = EPOLLIN; |
| epoll_ctl(epfd, EPOLL_CTL_ADD, fds.back(), &ev); |
| } |
| while (state.KeepRunning()) { |
| epoll_wait(epfd, ev, nev, 0); |
| } |
| for (auto fd : fds) { |
| close(fd); |
| } |
| close(epfd); |
| delete[] ev; |
| track_counters.Finish(state); |
| } |
| BENCHMARK(BM_PollEmptyPollset_SpeedOfLight) |
| ->Args({1, 0}) |
| ->Args({1, 1}) |
| ->Args({1, 10}) |
| ->Args({1, 100}) |
| ->Args({1, 1000}) |
| ->Args({1, 10000}) |
| ->Args({1, 100000}) |
| ->Args({10, 1}) |
| ->Args({100, 1}) |
| ->Args({1000, 1}); |
| #endif |
| |
| static void BM_PollEmptyPollset(benchmark::State& state) { |
| TrackCounters track_counters; |
| size_t ps_sz = grpc_pollset_size(); |
| grpc_pollset* ps = static_cast<grpc_pollset*>(gpr_zalloc(ps_sz)); |
| gpr_mu* mu; |
| grpc_pollset_init(ps, &mu); |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| gpr_mu_lock(mu); |
| while (state.KeepRunning()) { |
| GRPC_ERROR_UNREF(grpc_pollset_work(&exec_ctx, ps, nullptr, 0)); |
| } |
| grpc_closure shutdown_ps_closure; |
| GRPC_CLOSURE_INIT(&shutdown_ps_closure, shutdown_ps, ps, |
| grpc_schedule_on_exec_ctx); |
| grpc_pollset_shutdown(&exec_ctx, ps, &shutdown_ps_closure); |
| gpr_mu_unlock(mu); |
| grpc_exec_ctx_finish(&exec_ctx); |
| gpr_free(ps); |
| track_counters.Finish(state); |
| } |
| BENCHMARK(BM_PollEmptyPollset); |
| |
| static void BM_PollAddFd(benchmark::State& state) { |
| TrackCounters track_counters; |
| size_t ps_sz = grpc_pollset_size(); |
| grpc_pollset* ps = static_cast<grpc_pollset*>(gpr_zalloc(ps_sz)); |
| gpr_mu* mu; |
| grpc_pollset_init(ps, &mu); |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| grpc_wakeup_fd wakeup_fd; |
| GPR_ASSERT( |
| GRPC_LOG_IF_ERROR("wakeup_fd_init", grpc_wakeup_fd_init(&wakeup_fd))); |
| grpc_fd* fd = grpc_fd_create(wakeup_fd.read_fd, "xxx"); |
| while (state.KeepRunning()) { |
| grpc_pollset_add_fd(&exec_ctx, ps, fd); |
| grpc_exec_ctx_flush(&exec_ctx); |
| } |
| grpc_fd_orphan(&exec_ctx, fd, nullptr, nullptr, false /* already_closed */, |
| "xxx"); |
| grpc_closure shutdown_ps_closure; |
| GRPC_CLOSURE_INIT(&shutdown_ps_closure, shutdown_ps, ps, |
| grpc_schedule_on_exec_ctx); |
| gpr_mu_lock(mu); |
| grpc_pollset_shutdown(&exec_ctx, ps, &shutdown_ps_closure); |
| gpr_mu_unlock(mu); |
| grpc_exec_ctx_finish(&exec_ctx); |
| gpr_free(ps); |
| track_counters.Finish(state); |
| } |
| BENCHMARK(BM_PollAddFd); |
| |
| class Closure : public grpc_closure { |
| public: |
| virtual ~Closure() {} |
| }; |
| |
| template <class F> |
| Closure* MakeClosure(F f, grpc_closure_scheduler* scheduler) { |
| struct C : public Closure { |
| C(F f, grpc_closure_scheduler* scheduler) : f_(f) { |
| GRPC_CLOSURE_INIT(this, C::cbfn, this, scheduler); |
| } |
| static void cbfn(grpc_exec_ctx* exec_ctx, void* arg, grpc_error* error) { |
| C* p = static_cast<C*>(arg); |
| p->f_(); |
| } |
| F f_; |
| }; |
| return new C(f, scheduler); |
| } |
| |
| #ifdef GRPC_LINUX_MULTIPOLL_WITH_EPOLL |
| static void BM_SingleThreadPollOneFd_SpeedOfLight(benchmark::State& state) { |
| // equivalent to BM_PollEmptyPollset, but just use the OS primitives to guage |
| // what the speed of light would be if we abstracted perfectly |
| TrackCounters track_counters; |
| int epfd = epoll_create1(0); |
| GPR_ASSERT(epfd != -1); |
| epoll_event ev[100]; |
| int fd = eventfd(0, EFD_NONBLOCK); |
| ev[0].events = EPOLLIN; |
| epoll_ctl(epfd, EPOLL_CTL_ADD, fd, &ev[0]); |
| while (state.KeepRunning()) { |
| int err; |
| do { |
| err = eventfd_write(fd, 1); |
| } while (err < 0 && errno == EINTR); |
| GPR_ASSERT(err == 0); |
| do { |
| err = epoll_wait(epfd, ev, GPR_ARRAY_SIZE(ev), 0); |
| } while (err < 0 && errno == EINTR); |
| GPR_ASSERT(err == 1); |
| eventfd_t value; |
| do { |
| err = eventfd_read(fd, &value); |
| } while (err < 0 && errno == EINTR); |
| GPR_ASSERT(err == 0); |
| } |
| close(fd); |
| close(epfd); |
| track_counters.Finish(state); |
| } |
| BENCHMARK(BM_SingleThreadPollOneFd_SpeedOfLight); |
| #endif |
| |
| static void BM_SingleThreadPollOneFd(benchmark::State& state) { |
| TrackCounters track_counters; |
| size_t ps_sz = grpc_pollset_size(); |
| grpc_pollset* ps = static_cast<grpc_pollset*>(gpr_zalloc(ps_sz)); |
| gpr_mu* mu; |
| grpc_pollset_init(ps, &mu); |
| grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
| grpc_wakeup_fd wakeup_fd; |
| GRPC_ERROR_UNREF(grpc_wakeup_fd_init(&wakeup_fd)); |
| grpc_fd* wakeup = grpc_fd_create(wakeup_fd.read_fd, "wakeup_read"); |
| grpc_pollset_add_fd(&exec_ctx, ps, wakeup); |
| bool done = false; |
| Closure* continue_closure = MakeClosure( |
| [&]() { |
| GRPC_ERROR_UNREF(grpc_wakeup_fd_consume_wakeup(&wakeup_fd)); |
| if (!state.KeepRunning()) { |
| done = true; |
| return; |
| } |
| GRPC_ERROR_UNREF(grpc_wakeup_fd_wakeup(&wakeup_fd)); |
| grpc_fd_notify_on_read(&exec_ctx, wakeup, continue_closure); |
| }, |
| grpc_schedule_on_exec_ctx); |
| GRPC_ERROR_UNREF(grpc_wakeup_fd_wakeup(&wakeup_fd)); |
| grpc_fd_notify_on_read(&exec_ctx, wakeup, continue_closure); |
| gpr_mu_lock(mu); |
| while (!done) { |
| GRPC_ERROR_UNREF( |
| grpc_pollset_work(&exec_ctx, ps, nullptr, GRPC_MILLIS_INF_FUTURE)); |
| } |
| grpc_fd_orphan(&exec_ctx, wakeup, nullptr, nullptr, |
| false /* already_closed */, "done"); |
| wakeup_fd.read_fd = 0; |
| grpc_closure shutdown_ps_closure; |
| GRPC_CLOSURE_INIT(&shutdown_ps_closure, shutdown_ps, ps, |
| grpc_schedule_on_exec_ctx); |
| grpc_pollset_shutdown(&exec_ctx, ps, &shutdown_ps_closure); |
| gpr_mu_unlock(mu); |
| grpc_exec_ctx_finish(&exec_ctx); |
| grpc_wakeup_fd_destroy(&wakeup_fd); |
| gpr_free(ps); |
| track_counters.Finish(state); |
| delete continue_closure; |
| } |
| BENCHMARK(BM_SingleThreadPollOneFd); |
| |
| BENCHMARK_MAIN(); |