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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/chrono_utils.h>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <cutils/iosched_policy.h>
#include <private/android_filesystem_config.h>
#include <wakelock/wakelock.h>
#include <thread>
#include <sys/resource.h>
#include <sys/time.h>
#include <unistd.h>
using android::base::ReadFileToString;
using android::base::WriteStringToFile;
namespace android {
namespace vold {
// Benchmark currently uses chdir(), which means we can only
// safely run one at a time.
static std::mutex kBenchmarkLock;
static const char* kWakeLock = "Benchmark";
// Reasonable cards are able to complete the create/run stages
// in under 20 seconds.
constexpr auto kTimeout = 20s;
// RAII class for boosting device performance during benchmarks.
class PerformanceBoost {
private:
int orig_prio;
int orig_ioprio;
IoSchedClass orig_clazz;
public:
PerformanceBoost() {
errno = 0;
orig_prio = getpriority(PRIO_PROCESS, 0);
if (errno != 0) {
PLOG(WARNING) << "Failed to getpriority";
orig_prio = 0;
}
if (setpriority(PRIO_PROCESS, 0, -10) != 0) {
PLOG(WARNING) << "Failed to setpriority";
}
if (android_get_ioprio(0, &orig_clazz, &orig_ioprio)) {
PLOG(WARNING) << "Failed to android_get_ioprio";
orig_ioprio = 0;
orig_clazz = IoSchedClass_NONE;
}
if (android_set_ioprio(0, IoSchedClass_RT, 0)) {
PLOG(WARNING) << "Failed to android_set_ioprio";
}
}
~PerformanceBoost() {
if (android_set_ioprio(0, orig_clazz, orig_ioprio)) {
PLOG(WARNING) << "Failed to android_set_ioprio";
}
if (setpriority(PRIO_PROCESS, 0, orig_prio) != 0) {
PLOG(WARNING) << "Failed to setpriority";
}
}
};
static status_t benchmarkInternal(const std::string& rootPath,
const android::sp<android::os::IVoldTaskListener>& listener,
android::os::PersistableBundle* extras) {
status_t res = 0;
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;
}
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();
extras->putString(String16("path"), String16(path.c_str()));
extras->putString(String16("ident"), String16(BenchmarkIdent().c_str()));
// Always create
{
android::base::Timer timer;
LOG(INFO) << "Creating " << path;
res |= BenchmarkCreate([&](int progress) -> bool {
if (listener) {
listener->onStatus(progress, *extras);
}
return (timer.duration() < kTimeout);
});
sync();
if (res == OK) extras->putLong(String16("create"), timer.duration().count());
}
// Only drop when we haven't aborted
if (res == OK) {
android::base::Timer timer;
LOG(DEBUG) << "Before drop_caches";
if (!WriteStringToFile("3", "/proc/sys/vm/drop_caches")) {
PLOG(ERROR) << "Failed to drop_caches";
res = -1;
}
LOG(DEBUG) << "After drop_caches";
sync();
if (res == OK) extras->putLong(String16("drop"), timer.duration().count());
}
// Only run when we haven't aborted
if (res == OK) {
android::base::Timer timer;
LOG(INFO) << "Running " << path;
res |= BenchmarkRun([&](int progress) -> bool {
if (listener) {
listener->onStatus(progress, *extras);
}
return (timer.duration() < kTimeout);
});
sync();
if (res == OK) extras->putLong(String16("run"), timer.duration().count());
}
// Always destroy
{
android::base::Timer timer;
LOG(INFO) << "Destroying " << path;
res |= BenchmarkDestroy();
sync();
if (res == OK) extras->putLong(String16("destroy"), timer.duration().count());
}
if (chdir(orig_cwd) != 0) {
PLOG(ERROR) << "Failed to chdir";
return -1;
}
return res;
}
void Benchmark(const std::string& path,
const android::sp<android::os::IVoldTaskListener>& listener) {
std::lock_guard<std::mutex> lock(kBenchmarkLock);
auto wl = android::wakelock::WakeLock::tryGet(kWakeLock);
if (!wl.has_value()) {
return;
}
PerformanceBoost boost;
android::os::PersistableBundle extras;
status_t res = benchmarkInternal(path, listener, &extras);
if (listener) {
listener->onFinished(res, extras);
}
}
} // namespace vold
} // namespace android
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