41f19708c8
The benchmark creates a set of DSOs that mimic the work involved in loading the current version of libandroid_servers.so. The synthetic benchmark has roughly the same number of libraries with roughly the same relocations. Currently, on a local aosp_walleye build that includes recent performance improvements (including the Neon-based CL I3983bca1dddc9241bb70290ad3651d895f046660), using the "performance" governor, the benchmark reports these scores: $ adb shell taskset 10 \ /data/benchmarktest64/linker-reloc-bench/linker-reloc-bench \ --benchmark_repetitions=20 --benchmark_display_aggregates_only=true ... -------------------------------------------------------------------------------- Benchmark Time CPU Iterations -------------------------------------------------------------------------------- BM_linker_relocation/real_time_mean 70048 us 465 us 20 BM_linker_relocation/real_time_median 70091 us 466 us 20 BM_linker_relocation/real_time_stddev 329 us 8.29 us 20 $ adb shell taskset 10 \ /data/benchmarktest/linker-reloc-bench/linker-reloc-bench \ --benchmark_repetitions=20 --benchmark_display_aggregates_only=true ... -------------------------------------------------------------------------------- Benchmark Time CPU Iterations -------------------------------------------------------------------------------- BM_linker_relocation/real_time_mean 83051 us 462 us 20 BM_linker_relocation/real_time_median 83069 us 464 us 20 BM_linker_relocation/real_time_stddev 184 us 8.91 us 20 Test: manual Bug: none Change-Id: I6dac66978f8666f95c76387093bda6be0151bfce
64 lines
2.5 KiB
C++
64 lines
2.5 KiB
C++
/*
|
|
* Copyright (C) 2019 The Android Open Source Project
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "spawn_benchmark.h"
|
|
|
|
#include <errno.h>
|
|
#include <spawn.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include <android-base/stringprintf.h>
|
|
|
|
extern char** environ;
|
|
|
|
void BM_spawn_test(benchmark::State& state, const char* const* argv) {
|
|
for (auto _ : state) {
|
|
pid_t child = 0;
|
|
if (int spawn_err = posix_spawn(&child, argv[0], nullptr, nullptr, const_cast<char**>(argv),
|
|
environ)) {
|
|
state.SkipWithError(android::base::StringPrintf(
|
|
"posix_spawn of %s failed: %s", argv[0], strerror(spawn_err)).c_str());
|
|
break;
|
|
}
|
|
|
|
int wstatus = 0;
|
|
const pid_t wait_result = TEMP_FAILURE_RETRY(waitpid(child, &wstatus, 0));
|
|
if (wait_result != child) {
|
|
state.SkipWithError(android::base::StringPrintf(
|
|
"waitpid on pid %d for %s failed: %s",
|
|
static_cast<int>(child), argv[0], strerror(errno)).c_str());
|
|
break;
|
|
}
|
|
if (WIFEXITED(wstatus) && WEXITSTATUS(wstatus) == 127) {
|
|
state.SkipWithError(android::base::StringPrintf("could not exec %s", argv[0]).c_str());
|
|
break;
|
|
}
|
|
}
|
|
}
|