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/*
* Copyright (C) 2019 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 <chrono>
#include <thread>
// This source file is built in two ways:
// 1. As part of the regular GN build, against standard includes.
// 2. To test that the amalgmated SDK works, against the perfetto.h source.
#ifdef PERFETTO_AMALGAMATED_SDK_TEST
#include "perfetto.h"
#else
#include "perfetto/tracing.h"
#include "protos/perfetto/config/gpu/gpu_counter_config.pbzero.h"
#include "protos/perfetto/trace/gpu/gpu_counter_event.pbzero.h"
#include "protos/perfetto/trace/test_event.pbzero.h"
#include "protos/perfetto/trace/trace_packet.pbzero.h"
#endif
// Deliberately not pulling any non-public perfetto header to spot accidental
// header public -> non-public dependency while building this file.
namespace {
class MyDataSource : public perfetto::DataSource<MyDataSource> {
public:
void OnSetup(const SetupArgs& args) override {
// This can be used to access the domain-specific DataSourceConfig, via
// args.config->xxx_config_raw().
const std::string& config_raw = args.config->gpu_counter_config_raw();
perfetto::protos::pbzero::GpuCounterConfig::Decoder config(config_raw);
int sample_period = 0;
if (config.has_counter_period_ns())
sample_period = static_cast<int>(config.counter_period_ns());
std::vector<uint32_t> counter_ids;
for (auto it = config.counter_ids(); it; ++it) {
uint32_t counter_id = it->as_uint32();
if (counter_id > 0) {
counter_ids.push_back(counter_id);
}
}
PERFETTO_ILOG(
"OnSetup called, name: %s,"
"counter_period_ms: %d, tracing_session_id: %" PRIu64
" num counters: %zu",
args.config->name().c_str(), int(sample_period / 1000000),
args.config->tracing_session_id(), counter_ids.size());
}
void OnStart(const StartArgs&) override { PERFETTO_ILOG("OnStart called"); }
void OnStop(const StopArgs& stop_args) override {
PERFETTO_ILOG("OnStop called");
auto stop_closure = stop_args.HandleStopAsynchronously();
// It is possible to trace on stop as well, but doing so requires manually
// calling Flush() at the end.
MyDataSource::Trace([](MyDataSource::TraceContext ctx) {
PERFETTO_LOG("Tracing lambda called while stopping");
// This block here is to auto-finalize the packet before calling Flush.
{
auto packet = ctx.NewTracePacket();
packet->set_timestamp(999);
}
ctx.Flush();
});
stop_closure();
}
};
} // namespace
PERFETTO_DECLARE_DATA_SOURCE_STATIC_MEMBERS(MyDataSource);
PERFETTO_DEFINE_DATA_SOURCE_STATIC_MEMBERS(MyDataSource);
int main() {
perfetto::TracingInitArgs args;
args.backends = perfetto::kSystemBackend;
perfetto::Tracing::Initialize(args);
// DataSourceDescriptor can be used to advertise domain-specific features.
perfetto::DataSourceDescriptor dsd;
dsd.set_name("com.example.mytrace");
MyDataSource::Register(dsd);
for (;;) {
MyDataSource::Trace([](MyDataSource::TraceContext ctx) {
PERFETTO_LOG("Tracing lambda called");
auto packet = ctx.NewTracePacket();
packet->set_timestamp(42);
auto* gpu_packet = packet->set_gpu_counter_event();
auto* cnt = gpu_packet->add_counters();
cnt->set_counter_id(1);
});
std::this_thread::sleep_for(std::chrono::seconds(1));
}
}