71919f4f5d
Existing dummy benchmark converted to a single-pass benchmark.
Add support for ">[filename]" interpretation in liblogcat, helpful to
provide more consistent benchmark results when sending output to
/dev/null.
NB: results are not consistent as there is a roundtrip to logd
service, but they are indicative of better performance for
liblogcat.
Benchmark Time CPU Iterations
----------------------------------------------------------------------
BM_logcat_stat_popen_libc 35221677 ns 603314 ns 100
BM_logcat_stat_popen_liblogcat 15871805 ns 579398 ns 1287
BM_logcat_stat_system_libc 39037825 ns 319882 ns 100
BM_logcat_stat_system_liblogcat 9896755 ns 762610 ns 1310
BM_logcat_dump_popen_libc 776206254 ns 131448772 ns 5
BM_logcat_dump_popen_liblogcat 610674905 ns 118709624 ns 6
BM_logcat_dump_system_libc 512191254 ns 388724 ns 10
BM_logcat_dump_system_liblogcat 443897570 ns 377215696 ns 2
Test: logcat-benchmarks --benchmark_filter='BM_logcat_stat*|BM_logcat_dump*'
Bug: 35326290
Change-Id: Ie94900a3070487f45742f6c0789b5b3cf036df34
96 lines
3 KiB
C++
96 lines
3 KiB
C++
/*
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* Copyright (C) 2017 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 <stdio.h>
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#include <android-base/file.h>
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#include <benchmark/benchmark.h>
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#include <log/logcat.h>
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// Dump the statistics and report results
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static void logcat_popen_libc(benchmark::State& state, const char* cmd) {
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while (state.KeepRunning()) {
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FILE* fp = popen(cmd, "r");
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std::string ret;
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android::base::ReadFdToString(fileno(fp), &ret);
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pclose(fp);
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}
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}
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static void BM_logcat_stat_popen_libc(benchmark::State& state) {
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logcat_popen_libc(state, "logcat -b all -S");
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}
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BENCHMARK(BM_logcat_stat_popen_libc);
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static void logcat_popen_liblogcat(benchmark::State& state, const char* cmd) {
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while (state.KeepRunning()) {
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android_logcat_context ctx;
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FILE* fp = android_logcat_popen(&ctx, cmd);
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std::string ret;
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android::base::ReadFdToString(fileno(fp), &ret);
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android_logcat_pclose(&ctx, fp);
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}
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}
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static void BM_logcat_stat_popen_liblogcat(benchmark::State& state) {
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logcat_popen_liblogcat(state, "logcat -b all -S");
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}
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BENCHMARK(BM_logcat_stat_popen_liblogcat);
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static void logcat_system_libc(benchmark::State& state, const char* cmd) {
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while (state.KeepRunning()) {
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system(cmd);
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}
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}
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static void BM_logcat_stat_system_libc(benchmark::State& state) {
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logcat_system_libc(state, "logcat -b all -S >/dev/null 2>/dev/null");
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}
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BENCHMARK(BM_logcat_stat_system_libc);
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static void logcat_system_liblogcat(benchmark::State& state, const char* cmd) {
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while (state.KeepRunning()) {
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android_logcat_system(cmd);
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}
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}
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static void BM_logcat_stat_system_liblogcat(benchmark::State& state) {
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logcat_system_liblogcat(state, "logcat -b all -S >/dev/null 2>/dev/null");
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}
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BENCHMARK(BM_logcat_stat_system_liblogcat);
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// Dump the logs and report results
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static void BM_logcat_dump_popen_libc(benchmark::State& state) {
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logcat_popen_libc(state, "logcat -b all -d");
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}
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BENCHMARK(BM_logcat_dump_popen_libc);
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static void BM_logcat_dump_popen_liblogcat(benchmark::State& state) {
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logcat_popen_liblogcat(state, "logcat -b all -d");
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}
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BENCHMARK(BM_logcat_dump_popen_liblogcat);
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static void BM_logcat_dump_system_libc(benchmark::State& state) {
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logcat_system_libc(state, "logcat -b all -d >/dev/null 2>/dev/null");
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}
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BENCHMARK(BM_logcat_dump_system_libc);
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static void BM_logcat_dump_system_liblogcat(benchmark::State& state) {
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logcat_system_liblogcat(state, "logcat -b all -d >/dev/null 2>/dev/null");
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}
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BENCHMARK(BM_logcat_dump_system_liblogcat);
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