1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "benchmark.h" 18 19 #include <stdio.h> 20 21 #define KB 1024 22 #define MB 1024*KB 23 24 #define AT_COMMON_SIZES \ 25 Arg(1)->Arg(2)->Arg(3)->Arg(4)->Arg(8)->Arg(16)->Arg(32)->Arg(64)->Arg(512)-> \ 26 Arg(1*KB)->Arg(4*KB)->Arg(8*KB)->Arg(16*KB)->Arg(64*KB) 27 28 static void BM_stdio_fread(int iters, int chunk_size) { 29 StopBenchmarkTiming(); 30 FILE* fp = fopen("/dev/zero", "rw"); 31 char* buf = new char[chunk_size]; 32 StartBenchmarkTiming(); 33 34 for (int i = 0; i < iters; ++i) { 35 fread(buf, chunk_size, 1, fp); 36 } 37 38 StopBenchmarkTiming(); 39 SetBenchmarkBytesProcessed(int64_t(iters) * int64_t(chunk_size)); 40 delete[] buf; 41 fclose(fp); 42 } 43 BENCHMARK(BM_stdio_fread)->AT_COMMON_SIZES; 44 45 46 static void BM_stdio_fwrite(int iters, int chunk_size) { 47 StopBenchmarkTiming(); 48 FILE* fp = fopen("/dev/zero", "rw"); 49 char* buf = new char[chunk_size]; 50 StartBenchmarkTiming(); 51 52 for (int i = 0; i < iters; ++i) { 53 fwrite(buf, chunk_size, 1, fp); 54 } 55 56 StopBenchmarkTiming(); 57 SetBenchmarkBytesProcessed(int64_t(iters) * int64_t(chunk_size)); 58 delete[] buf; 59 fclose(fp); 60 } 61 BENCHMARK(BM_stdio_fwrite)->AT_COMMON_SIZES; 62
