/* * 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 "benchmark.h" #include #include #define KB 1024 #define MB 1024*KB #define AT_COMMON_SIZES \ Arg(1)->Arg(2)->Arg(3)->Arg(4)->Arg(8)->Arg(16)->Arg(32)->Arg(64)->Arg(512)-> \ Arg(1*KB)->Arg(4*KB)->Arg(8*KB)->Arg(16*KB)->Arg(64*KB) template static void ReadWriteTest(int iters, int chunk_size, Fn f, bool buffered) { StopBenchmarkTiming(); FILE* fp = fopen("/dev/zero", "rw"); __fsetlocking(fp, FSETLOCKING_BYCALLER); char* buf = new char[chunk_size]; StartBenchmarkTiming(); if (!buffered) { setvbuf(fp, 0, _IONBF, 0); } for (int i = 0; i < iters; ++i) { f(buf, chunk_size, 1, fp); } StopBenchmarkTiming(); SetBenchmarkBytesProcessed(int64_t(iters) * int64_t(chunk_size)); delete[] buf; fclose(fp); } static void BM_stdio_fread(int iters, int chunk_size) { ReadWriteTest(iters, chunk_size, fread, true); } BENCHMARK(BM_stdio_fread)->AT_COMMON_SIZES; static void BM_stdio_fwrite(int iters, int chunk_size) { ReadWriteTest(iters, chunk_size, fwrite, true); } BENCHMARK(BM_stdio_fwrite)->AT_COMMON_SIZES; static void BM_stdio_fread_unbuffered(int iters, int chunk_size) { ReadWriteTest(iters, chunk_size, fread, false); } BENCHMARK(BM_stdio_fread_unbuffered)->AT_COMMON_SIZES; static void BM_stdio_fwrite_unbuffered(int iters, int chunk_size) { ReadWriteTest(iters, chunk_size, fwrite, false); } BENCHMARK(BM_stdio_fwrite_unbuffered)->AT_COMMON_SIZES; static void FopenFgetsFclose(int iters, bool no_locking) { char buf[1024]; for (int i = 0; i < iters; ++i) { FILE* fp = fopen("/proc/version", "re"); if (no_locking) __fsetlocking(fp, FSETLOCKING_BYCALLER); fgets(buf, sizeof(buf), fp); fclose(fp); } } static void BM_stdio_fopen_fgets_fclose_locking(int iters) { FopenFgetsFclose(iters, false); } BENCHMARK(BM_stdio_fopen_fgets_fclose_locking); static void BM_stdio_fopen_fgets_fclose_no_locking(int iters) { FopenFgetsFclose(iters, true); } BENCHMARK(BM_stdio_fopen_fgets_fclose_no_locking);