1 /* 2 * Copyright (C) 2013 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 <sys/syscall.h> 18 #include <sys/time.h> 19 #include <time.h> 20 21 #include <benchmark/Benchmark.h> 22 23 BENCHMARK_NO_ARG(BM_time_clock_gettime); 24 void BM_time_clock_gettime::Run(int iters) { 25 StartBenchmarkTiming(); 26 27 timespec t; 28 for (int i = 0; i < iters; ++i) { 29 clock_gettime(CLOCK_MONOTONIC, &t); 30 } 31 32 StopBenchmarkTiming(); 33 } 34 35 BENCHMARK_NO_ARG(BM_time_clock_gettime_syscall); 36 void BM_time_clock_gettime_syscall::Run(int iters) { 37 StartBenchmarkTiming(); 38 39 timespec t; 40 for (int i = 0; i < iters; ++i) { 41 syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &t); 42 } 43 44 StopBenchmarkTiming(); 45 } 46 47 BENCHMARK_NO_ARG(BM_time_gettimeofday); 48 void BM_time_gettimeofday::Run(int iters) { 49 StartBenchmarkTiming(); 50 51 timeval tv; 52 for (int i = 0; i < iters; ++i) { 53 gettimeofday(&tv, NULL); 54 } 55 56 StopBenchmarkTiming(); 57 } 58 59 BENCHMARK_NO_ARG(BM_time_gettimeofday_syscall); 60 void BM_time_gettimeofday_syscall::Run(int iters) { 61 StartBenchmarkTiming(); 62 63 timeval tv; 64 for (int i = 0; i < iters; ++i) { 65 syscall(__NR_gettimeofday, &tv, NULL); 66 } 67 68 StopBenchmarkTiming(); 69 } 70 71 BENCHMARK_NO_ARG(BM_time_time); 72 void BM_time_time::Run(int iters) { 73 StartBenchmarkTiming(); 74 75 for (int i = 0; i < iters; ++i) { 76 time(NULL); 77 } 78 79 StopBenchmarkTiming(); 80 } 81
