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/*
* Copyright (C) 2018 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 "test/fake_producer.h"
#include <mutex>
#include "perfetto/base/logging.h"
#include "perfetto/base/time.h"
#include "perfetto/ext/base/utils.h"
#include "perfetto/ext/tracing/core/commit_data_request.h"
#include "perfetto/ext/tracing/core/shared_memory_arbiter.h"
#include "perfetto/ext/tracing/core/trace_packet.h"
#include "perfetto/ext/tracing/core/trace_writer.h"
#include "perfetto/tracing/core/data_source_config.h"
#include "protos/perfetto/config/test_config.gen.h"
#include "protos/perfetto/trace/test_event.pbzero.h"
#include "protos/perfetto/trace/trace_packet.pbzero.h"
namespace perfetto {
namespace {
const MaybeUnboundBufferID kStartupTargetBufferReservationId = 1;
} // namespace
FakeProducer::FakeProducer(const std::string& name,
base::TaskRunner* task_runner)
: name_(name), task_runner_(task_runner) {}
FakeProducer::~FakeProducer() = default;
void FakeProducer::Connect(const char* socket_name,
std::function<void()> on_connect,
std::function<void()> on_setup_data_source_instance,
std::function<void()> on_create_data_source_instance,
std::unique_ptr<SharedMemory> shm,
std::unique_ptr<SharedMemoryArbiter> shm_arbiter) {
PERFETTO_DCHECK_THREAD(thread_checker_);
endpoint_ = ProducerIPCClient::Connect(
socket_name, this, "android.perfetto.FakeProducer", task_runner_,
TracingService::ProducerSMBScrapingMode::kDefault,
/*shared_memory_size_hint_bytes=*/0,
/*shared_memory_page_size_hint_bytes=*/4096, std::move(shm),
std::move(shm_arbiter));
on_connect_ = std::move(on_connect);
on_setup_data_source_instance_ = std::move(on_setup_data_source_instance);
on_create_data_source_instance_ = std::move(on_create_data_source_instance);
}
void FakeProducer::OnConnect() {
PERFETTO_DCHECK_THREAD(thread_checker_);
DataSourceDescriptor descriptor;
descriptor.set_name(name_);
endpoint_->RegisterDataSource(descriptor);
auto on_connect_callback = std::move(on_connect_);
auto task_runner = task_runner_;
endpoint_->Sync([task_runner, on_connect_callback] {
task_runner->PostTask(on_connect_callback);
});
}
void FakeProducer::OnDisconnect() {
PERFETTO_DCHECK_THREAD(thread_checker_);
PERFETTO_FATAL("Producer unexpectedly disconnected from the service");
}
void FakeProducer::SetupDataSource(DataSourceInstanceID,
const DataSourceConfig&) {
task_runner_->PostTask(on_setup_data_source_instance_);
}
void FakeProducer::StartDataSource(DataSourceInstanceID,
const DataSourceConfig& source_config) {
PERFETTO_DCHECK_THREAD(thread_checker_);
if (trace_writer_) {
// Startup tracing was already active, just bind the target buffer.
endpoint_->MaybeSharedMemoryArbiter()->BindStartupTargetBuffer(
kStartupTargetBufferReservationId,
static_cast<BufferID>(source_config.target_buffer()));
} else {
// Common case: Start tracing now.
trace_writer_ = endpoint_->CreateTraceWriter(
static_cast<BufferID>(source_config.target_buffer()));
SetupFromConfig(source_config.for_testing());
}
if (source_config.for_testing().send_batch_on_register()) {
ProduceEventBatch(on_create_data_source_instance_);
} else {
task_runner_->PostTask(on_create_data_source_instance_);
}
}
void FakeProducer::StopDataSource(DataSourceInstanceID) {
PERFETTO_DCHECK_THREAD(thread_checker_);
trace_writer_.reset();
}
// Note: this can be called on a different thread.
void FakeProducer::ProduceStartupEventBatch(
const protos::gen::TestConfig& config,
SharedMemoryArbiter* arbiter,
std::function<void()> callback) {
task_runner_->PostTask([this, config, arbiter, callback] {
SetupFromConfig(config);
PERFETTO_CHECK(!trace_writer_);
trace_writer_ =
arbiter->CreateStartupTraceWriter(kStartupTargetBufferReservationId);
EmitEventBatchOnTaskRunner({});
// Issue callback right after writing - cannot wait for flush yet because
// we're not connected yet.
callback();
});
}
// Note: this can be called on a different thread.
void FakeProducer::ProduceEventBatch(std::function<void()> callback) {
task_runner_->PostTask(
[this, callback] { EmitEventBatchOnTaskRunner(callback); });
}
void FakeProducer::RegisterDataSource(const DataSourceDescriptor& desc) {
task_runner_->PostTask([this, desc] { endpoint_->RegisterDataSource(desc); });
}
void FakeProducer::CommitData(const CommitDataRequest& req,
std::function<void()> callback) {
task_runner_->PostTask(
[this, req, callback] { endpoint_->CommitData(req, callback); });
}
void FakeProducer::Sync(std::function<void()> callback) {
task_runner_->PostTask([this, callback] { endpoint_->Sync(callback); });
}
void FakeProducer::OnTracingSetup() {}
void FakeProducer::Flush(FlushRequestID flush_request_id,
const DataSourceInstanceID*,
size_t num_data_sources) {
PERFETTO_DCHECK(num_data_sources > 0);
if (trace_writer_)
trace_writer_->Flush();
endpoint_->NotifyFlushComplete(flush_request_id);
}
void FakeProducer::SetupFromConfig(const protos::gen::TestConfig& config) {
rnd_engine_ = std::minstd_rand0(config.seed());
message_count_ = config.message_count();
message_size_ = config.message_size();
max_messages_per_second_ = config.max_messages_per_second();
}
void FakeProducer::EmitEventBatchOnTaskRunner(std::function<void()> callback) {
PERFETTO_CHECK(trace_writer_);
PERFETTO_CHECK(message_size_ > 1);
std::unique_ptr<char, base::FreeDeleter> payload(
static_cast<char*>(malloc(message_size_)));
memset(payload.get(), '.', message_size_);
payload.get()[message_size_ - 1] = 0;
base::TimeMillis start = base::GetWallTimeMs();
int64_t iterations = 0;
uint32_t messages_to_emit = message_count_;
while (messages_to_emit > 0) {
uint32_t messages_in_minibatch =
max_messages_per_second_ == 0
? messages_to_emit
: std::min(max_messages_per_second_, messages_to_emit);
PERFETTO_DCHECK(messages_to_emit >= messages_in_minibatch);
for (uint32_t i = 0; i < messages_in_minibatch; i++) {
auto handle = trace_writer_->NewTracePacket();
handle->set_for_testing()->set_seq_value(
static_cast<uint32_t>(rnd_engine_()));
handle->set_for_testing()->set_str(payload.get(), message_size_);
}
messages_to_emit -= messages_in_minibatch;
iterations++;
// Pause until the second boundary to make sure that we are adhering to
// the speed limitation.
if (max_messages_per_second_ > 0) {
int64_t expected_time_taken = iterations * 1000;
base::TimeMillis time_taken = base::GetWallTimeMs() - start;
while (time_taken.count() < expected_time_taken) {
usleep(static_cast<useconds_t>(
(expected_time_taken - time_taken.count()) * 1000));
time_taken = base::GetWallTimeMs() - start;
}
}
trace_writer_->Flush(messages_to_emit > 0 ? [] {} : callback);
}
}
} // namespace perfetto