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/*
* Copyright (C) 2021 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 <BnBinderRpcBenchmark.h>
#include <android-base/logging.h>
#include <benchmark/benchmark.h>
#include <binder/Binder.h>
#include <binder/RpcServer.h>
#include <binder/RpcSession.h>
#include <thread>
#include <sys/types.h>
#include <unistd.h>
using android::BBinder;
using android::IBinder;
using android::interface_cast;
using android::OK;
using android::RpcServer;
using android::RpcSession;
using android::sp;
using android::binder::Status;
class MyBinderRpcBenchmark : public BnBinderRpcBenchmark {
Status repeatString(const std::string& str, std::string* out) override {
*out = str;
return Status::ok();
}
Status repeatBinder(const sp<IBinder>& str, sp<IBinder>* out) override {
*out = str;
return Status::ok();
}
};
static sp<RpcSession> gSession = RpcSession::make();
void BM_getRootObject(benchmark::State& state) {
while (state.KeepRunning()) {
CHECK(gSession->getRootObject() != nullptr);
}
}
BENCHMARK(BM_getRootObject);
void BM_pingTransaction(benchmark::State& state) {
sp<IBinder> binder = gSession->getRootObject();
CHECK(binder != nullptr);
while (state.KeepRunning()) {
CHECK_EQ(OK, binder->pingBinder());
}
}
BENCHMARK(BM_pingTransaction);
void BM_repeatString(benchmark::State& state) {
sp<IBinder> binder = gSession->getRootObject();
CHECK(binder != nullptr);
sp<IBinderRpcBenchmark> iface = interface_cast<IBinderRpcBenchmark>(binder);
CHECK(iface != nullptr);
// Googlers might see go/another-look-at-aidl-hidl-perf
//
// When I checked in July 2019, 99.5% of AIDL transactions and 99.99% of HIDL
// transactions were less than one page in size (system wide during a test
// involving media and camera). This is why this diverges from
// binderThroughputTest and hwbinderThroughputTest. Future consideration - get
// this data on continuous integration. Here we are testing sending a
// transaction of twice this size. In other cases, we should focus on
// benchmarks of particular usecases. If individual binder transactions like
// the ones tested here are fast, then Android performance will be dominated
// by how many binder calls work together (and by factors like the scheduler,
// thermal throttling, core choice, etc..).
std::string str = std::string(getpagesize() * 2, 'a');
CHECK_EQ(str.size(), getpagesize() * 2);
while (state.KeepRunning()) {
std::string out;
Status ret = iface->repeatString(str, &out);
CHECK(ret.isOk()) << ret;
}
}
BENCHMARK(BM_repeatString);
void BM_repeatBinder(benchmark::State& state) {
sp<IBinder> binder = gSession->getRootObject();
CHECK(binder != nullptr);
sp<IBinderRpcBenchmark> iface = interface_cast<IBinderRpcBenchmark>(binder);
CHECK(iface != nullptr);
while (state.KeepRunning()) {
// force creation of a new address
sp<IBinder> binder = sp<BBinder>::make();
sp<IBinder> out;
Status ret = iface->repeatBinder(binder, &out);
CHECK(ret.isOk()) << ret;
}
}
BENCHMARK(BM_repeatBinder);
int main(int argc, char** argv) {
::benchmark::Initialize(&argc, argv);
if (::benchmark::ReportUnrecognizedArguments(argc, argv)) return 1;
std::string addr = std::string(getenv("TMPDIR") ?: "/tmp") + "/binderRpcBenchmark";
(void)unlink(addr.c_str());
std::thread([addr]() {
sp<RpcServer> server = RpcServer::make();
server->setRootObject(sp<MyBinderRpcBenchmark>::make());
server->iUnderstandThisCodeIsExperimentalAndIWillNotUseItInProduction();
CHECK(server->setupUnixDomainServer(addr.c_str()));
server->join();
}).detach();
for (size_t tries = 0; tries < 5; tries++) {
usleep(10000);
if (gSession->setupUnixDomainClient(addr.c_str())) goto success;
}
LOG(FATAL) << "Could not connect.";
success:
::benchmark::RunSpecifiedBenchmarks();
return 0;
}
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