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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "Benchmark.h"
#include "BenchmarkGen.h"
#include "VolumeManager.h"
#include <android-base/file.h>
#include <android-base/logging.h>
#include <cutils/iosched_policy.h>
#include <hardware_legacy/power.h>
#include <private/android_filesystem_config.h>
#include <thread>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#define ENABLE_DROP_CACHES 1
using android::base::ReadFileToString;
using android::base::WriteStringToFile;
namespace android {
namespace vold {
static const char* kWakeLock = "Benchmark";
static status_t benchmarkInternal(const std::string& rootPath,
android::os::PersistableBundle* extras) {
auto path = rootPath;
path += "/misc";
if (android::vold::PrepareDir(path, 01771, AID_SYSTEM, AID_MISC)) {
return -1;
}
path += "/vold";
if (android::vold::PrepareDir(path, 0700, AID_ROOT, AID_ROOT)) {
return -1;
}
path += "/bench";
if (android::vold::PrepareDir(path, 0700, AID_ROOT, AID_ROOT)) {
return -1;
}
errno = 0;
int orig_prio = getpriority(PRIO_PROCESS, 0);
if (errno != 0) {
PLOG(ERROR) << "Failed to getpriority";
return -1;
}
if (setpriority(PRIO_PROCESS, 0, -10) != 0) {
PLOG(ERROR) << "Failed to setpriority";
return -1;
}
IoSchedClass orig_clazz = IoSchedClass_NONE;
int orig_ioprio = 0;
if (android_get_ioprio(0, &orig_clazz, &orig_ioprio)) {
PLOG(ERROR) << "Failed to android_get_ioprio";
return -1;
}
if (android_set_ioprio(0, IoSchedClass_RT, 0)) {
PLOG(ERROR) << "Failed to android_set_ioprio";
return -1;
}
char orig_cwd[PATH_MAX];
if (getcwd(orig_cwd, PATH_MAX) == NULL) {
PLOG(ERROR) << "Failed getcwd";
return -1;
}
if (chdir(path.c_str()) != 0) {
PLOG(ERROR) << "Failed chdir";
return -1;
}
sync();
LOG(INFO) << "Benchmarking " << path;
nsecs_t start = systemTime(SYSTEM_TIME_BOOTTIME);
BenchmarkCreate();
sync();
nsecs_t create = systemTime(SYSTEM_TIME_BOOTTIME);
#if ENABLE_DROP_CACHES
LOG(VERBOSE) << "Before drop_caches";
if (!WriteStringToFile("3", "/proc/sys/vm/drop_caches")) {
PLOG(ERROR) << "Failed to drop_caches";
}
LOG(VERBOSE) << "After drop_caches";
#endif
nsecs_t drop = systemTime(SYSTEM_TIME_BOOTTIME);
BenchmarkRun();
sync();
nsecs_t run = systemTime(SYSTEM_TIME_BOOTTIME);
BenchmarkDestroy();
sync();
nsecs_t destroy = systemTime(SYSTEM_TIME_BOOTTIME);
if (chdir(orig_cwd) != 0) {
PLOG(ERROR) << "Failed to chdir";
}
if (android_set_ioprio(0, orig_clazz, orig_ioprio)) {
PLOG(ERROR) << "Failed to android_set_ioprio";
}
if (setpriority(PRIO_PROCESS, 0, orig_prio) != 0) {
PLOG(ERROR) << "Failed to setpriority";
}
nsecs_t create_d = create - start;
nsecs_t drop_d = drop - create;
nsecs_t run_d = run - drop;
nsecs_t destroy_d = destroy - run;
LOG(INFO) << "create took " << nanoseconds_to_milliseconds(create_d) << "ms";
LOG(INFO) << "drop took " << nanoseconds_to_milliseconds(drop_d) << "ms";
LOG(INFO) << "run took " << nanoseconds_to_milliseconds(run_d) << "ms";
LOG(INFO) << "destroy took " << nanoseconds_to_milliseconds(destroy_d) << "ms";
extras->putString(String16("path"), String16(path.c_str()));
extras->putString(String16("ident"), String16(BenchmarkIdent().c_str()));
extras->putLong(String16("create"), create_d);
extras->putLong(String16("drop"), drop_d);
extras->putLong(String16("run"), run_d);
extras->putLong(String16("destroy"), destroy_d);
return 0;
}
void Benchmark(const std::string& path,
const android::sp<android::os::IVoldTaskListener>& listener) {
acquire_wake_lock(PARTIAL_WAKE_LOCK, kWakeLock);
android::os::PersistableBundle extras;
status_t res = benchmarkInternal(path, &extras);
if (listener) {
listener->onFinished(res, extras);
}
release_wake_lock(kWakeLock);
}
} // namespace vold
} // namespace android
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