| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * 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 <string.h> |
| #include <sys/syscall.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| #include <unistd.h> |
| |
| #include <string> |
| |
| #include <android-base/stringprintf.h> |
| #include <benchmark/benchmark.h> |
| #include "util.h" |
| |
| BIONIC_TRIVIAL_BENCHMARK(BM_unistd_getpid, getpid()); |
| BIONIC_TRIVIAL_BENCHMARK(BM_unistd_getpid_syscall, syscall(__NR_getpid)); |
| |
| // TODO: glibc 2.30 added gettid() too. |
| #if defined(__BIONIC__) |
| BIONIC_TRIVIAL_BENCHMARK(BM_unistd_gettid, gettid()); |
| #endif |
| BIONIC_TRIVIAL_BENCHMARK(BM_unistd_gettid_syscall, syscall(__NR_gettid)); |
| |
| // Many native allocators have custom prefork and postfork functions. |
| // Measure the fork call to make sure nothing takes too long. |
| void BM_unistd_fork_call(benchmark::State& state) { |
| for (auto _ : state) { |
| pid_t pid; |
| if ((pid = fork()) == 0) { |
| // Sleep for a little while so that the parent is not interrupted |
| // right away when the process exits. |
| usleep(100); |
| _exit(1); |
| } |
| state.PauseTiming(); |
| if (pid == -1) { |
| std::string err = android::base::StringPrintf("Fork failed: %s", strerror(errno)); |
| state.SkipWithError(err.c_str()); |
| } |
| pid_t wait_pid = waitpid(pid, 0, 0); |
| if (wait_pid != pid) { |
| if (wait_pid == -1) { |
| std::string err = android::base::StringPrintf("waitpid call failed: %s", strerror(errno)); |
| state.SkipWithError(err.c_str()); |
| } else { |
| std::string err = android::base::StringPrintf( |
| "waitpid return an unknown pid, expected %d, actual %d", pid, wait_pid); |
| state.SkipWithError(err.c_str()); |
| } |
| } |
| state.ResumeTiming(); |
| } |
| } |
| BIONIC_BENCHMARK(BM_unistd_fork_call); |