68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
/*
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* Copyright (C) 2014 The Android Open Source Project
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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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*/
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#include "benchmark.h"
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#include <stdio.h>
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#define KB 1024
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#define MB 1024*KB
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#define AT_COMMON_SIZES \
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Arg(1)->Arg(2)->Arg(3)->Arg(4)->Arg(8)->Arg(16)->Arg(32)->Arg(64)->Arg(512)-> \
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Arg(1*KB)->Arg(4*KB)->Arg(8*KB)->Arg(16*KB)->Arg(64*KB)
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template <typename Fn>
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static void ReadWriteTest(int iters, int chunk_size, Fn f, bool buffered) {
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StopBenchmarkTiming();
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FILE* fp = fopen("/dev/zero", "rw");
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char* buf = new char[chunk_size];
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StartBenchmarkTiming();
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if (!buffered) {
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setvbuf(fp, 0, _IONBF, 0);
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}
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for (int i = 0; i < iters; ++i) {
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f(buf, chunk_size, 1, fp);
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}
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StopBenchmarkTiming();
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SetBenchmarkBytesProcessed(int64_t(iters) * int64_t(chunk_size));
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delete[] buf;
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fclose(fp);
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}
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static void BM_stdio_fread(int iters, int chunk_size) {
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ReadWriteTest(iters, chunk_size, fread, true);
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}
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BENCHMARK(BM_stdio_fread)->AT_COMMON_SIZES;
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static void BM_stdio_fwrite(int iters, int chunk_size) {
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ReadWriteTest(iters, chunk_size, fwrite, true);
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}
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BENCHMARK(BM_stdio_fwrite)->AT_COMMON_SIZES;
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static void BM_stdio_fread_unbuffered(int iters, int chunk_size) {
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ReadWriteTest(iters, chunk_size, fread, false);
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}
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BENCHMARK(BM_stdio_fread_unbuffered)->AT_COMMON_SIZES;
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static void BM_stdio_fwrite_unbuffered(int iters, int chunk_size) {
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ReadWriteTest(iters, chunk_size, fwrite, false);
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}
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BENCHMARK(BM_stdio_fwrite_unbuffered)->AT_COMMON_SIZES;
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