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224 lines
8.2 KiB
224 lines
8.2 KiB
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "test/fake_producer.h"
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#include <mutex>
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#include <thread>
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#include "perfetto/base/logging.h"
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#include "perfetto/base/time.h"
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#include "perfetto/ext/base/utils.h"
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#include "perfetto/ext/tracing/core/commit_data_request.h"
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#include "perfetto/ext/tracing/core/shared_memory_arbiter.h"
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#include "perfetto/ext/tracing/core/trace_packet.h"
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#include "perfetto/ext/tracing/core/trace_writer.h"
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#include "perfetto/tracing/core/data_source_config.h"
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#include "src/ipc/client_impl.h"
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#include "src/tracing/ipc/producer/producer_ipc_client_impl.h"
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#include "protos/perfetto/config/test_config.gen.h"
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#include "protos/perfetto/trace/test_event.pbzero.h"
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#include "protos/perfetto/trace/trace_packet.pbzero.h"
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namespace perfetto {
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namespace {
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const MaybeUnboundBufferID kStartupTargetBufferReservationId = 1;
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} // namespace
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FakeProducer::FakeProducer(const std::string& name,
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base::TaskRunner* task_runner)
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: name_(name), task_runner_(task_runner) {}
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FakeProducer::~FakeProducer() = default;
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void FakeProducer::Connect(const char* socket_name,
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std::function<void()> on_connect,
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std::function<void()> on_setup_data_source_instance,
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std::function<void()> on_create_data_source_instance,
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std::unique_ptr<SharedMemory> shm,
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std::unique_ptr<SharedMemoryArbiter> shm_arbiter) {
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PERFETTO_DCHECK_THREAD(thread_checker_);
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endpoint_ = ProducerIPCClient::Connect(
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socket_name, this, "android.perfetto.FakeProducer", task_runner_,
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TracingService::ProducerSMBScrapingMode::kDefault,
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/*shared_memory_size_hint_bytes=*/0,
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/*shared_memory_page_size_hint_bytes=*/4096, std::move(shm),
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std::move(shm_arbiter));
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on_connect_ = std::move(on_connect);
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on_setup_data_source_instance_ = std::move(on_setup_data_source_instance);
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on_create_data_source_instance_ = std::move(on_create_data_source_instance);
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}
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void FakeProducer::OnConnect() {
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PERFETTO_DCHECK_THREAD(thread_checker_);
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DataSourceDescriptor descriptor;
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descriptor.set_name(name_);
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endpoint_->RegisterDataSource(descriptor);
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auto on_connect_callback = std::move(on_connect_);
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auto task_runner = task_runner_;
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endpoint_->Sync([task_runner, on_connect_callback] {
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task_runner->PostTask(on_connect_callback);
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});
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}
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void FakeProducer::OnDisconnect() {
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PERFETTO_DCHECK_THREAD(thread_checker_);
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PERFETTO_FATAL("Producer unexpectedly disconnected from the service");
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}
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void FakeProducer::SetupDataSource(DataSourceInstanceID,
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const DataSourceConfig&) {
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task_runner_->PostTask(on_setup_data_source_instance_);
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}
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void FakeProducer::StartDataSource(DataSourceInstanceID,
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const DataSourceConfig& source_config) {
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PERFETTO_DCHECK_THREAD(thread_checker_);
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if (trace_writer_) {
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// Startup tracing was already active, just bind the target buffer.
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endpoint_->MaybeSharedMemoryArbiter()->BindStartupTargetBuffer(
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kStartupTargetBufferReservationId,
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static_cast<BufferID>(source_config.target_buffer()));
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} else {
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// Common case: Start tracing now.
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trace_writer_ = endpoint_->CreateTraceWriter(
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static_cast<BufferID>(source_config.target_buffer()));
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SetupFromConfig(source_config.for_testing());
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}
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if (source_config.for_testing().send_batch_on_register()) {
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ProduceEventBatch(on_create_data_source_instance_);
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} else {
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task_runner_->PostTask(on_create_data_source_instance_);
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}
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}
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void FakeProducer::StopDataSource(DataSourceInstanceID) {
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PERFETTO_DCHECK_THREAD(thread_checker_);
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trace_writer_.reset();
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}
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// Note: this can be called on a different thread.
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void FakeProducer::ProduceStartupEventBatch(
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const protos::gen::TestConfig& config,
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SharedMemoryArbiter* arbiter,
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std::function<void()> callback) {
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task_runner_->PostTask([this, config, arbiter, callback] {
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SetupFromConfig(config);
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PERFETTO_CHECK(!trace_writer_);
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trace_writer_ =
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arbiter->CreateStartupTraceWriter(kStartupTargetBufferReservationId);
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EmitEventBatchOnTaskRunner({});
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// Issue callback right after writing - cannot wait for flush yet because
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// we're not connected yet.
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callback();
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});
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}
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// Note: this can be called on a different thread.
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void FakeProducer::ProduceEventBatch(std::function<void()> callback) {
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task_runner_->PostTask(
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[this, callback] { EmitEventBatchOnTaskRunner(callback); });
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}
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void FakeProducer::RegisterDataSource(const DataSourceDescriptor& desc) {
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task_runner_->PostTask([this, desc] { endpoint_->RegisterDataSource(desc); });
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}
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void FakeProducer::CommitData(const CommitDataRequest& req,
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std::function<void()> callback) {
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task_runner_->PostTask(
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[this, req, callback] { endpoint_->CommitData(req, callback); });
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}
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void FakeProducer::Sync(std::function<void()> callback) {
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task_runner_->PostTask([this, callback] { endpoint_->Sync(callback); });
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}
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void FakeProducer::OnTracingSetup() {}
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void FakeProducer::Flush(FlushRequestID flush_request_id,
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const DataSourceInstanceID*,
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size_t num_data_sources) {
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PERFETTO_DCHECK(num_data_sources > 0);
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if (trace_writer_)
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trace_writer_->Flush();
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endpoint_->NotifyFlushComplete(flush_request_id);
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}
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base::SocketHandle FakeProducer::unix_socket_fd() {
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// Since FakeProducer is only used in tests we can include and assume the
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// implementation.
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auto* producer = static_cast<ProducerIPCClientImpl*>(endpoint_.get());
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auto* ipc_client =
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static_cast<ipc::ClientImpl*>(producer->GetClientForTesting());
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return ipc_client->GetUnixSocketForTesting()->fd();
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}
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void FakeProducer::SetupFromConfig(const protos::gen::TestConfig& config) {
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rnd_engine_ = std::minstd_rand0(config.seed());
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message_count_ = config.message_count();
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message_size_ = config.message_size();
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max_messages_per_second_ = config.max_messages_per_second();
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}
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void FakeProducer::EmitEventBatchOnTaskRunner(std::function<void()> callback) {
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PERFETTO_CHECK(trace_writer_);
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PERFETTO_CHECK(message_size_ > 1);
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std::unique_ptr<char, base::FreeDeleter> payload(
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static_cast<char*>(malloc(message_size_)));
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memset(payload.get(), '.', message_size_);
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payload.get()[message_size_ - 1] = 0;
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base::TimeMillis start = base::GetWallTimeMs();
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int64_t iterations = 0;
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uint32_t messages_to_emit = message_count_;
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while (messages_to_emit > 0) {
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uint32_t messages_in_minibatch =
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max_messages_per_second_ == 0
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? messages_to_emit
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: std::min(max_messages_per_second_, messages_to_emit);
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PERFETTO_DCHECK(messages_to_emit >= messages_in_minibatch);
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for (uint32_t i = 0; i < messages_in_minibatch; i++) {
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auto handle = trace_writer_->NewTracePacket();
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handle->set_for_testing()->set_seq_value(
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static_cast<uint32_t>(rnd_engine_()));
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handle->set_for_testing()->set_str(payload.get(), message_size_);
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}
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messages_to_emit -= messages_in_minibatch;
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iterations++;
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// Pause until the second boundary to make sure that we are adhering to
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// the speed limitation.
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if (max_messages_per_second_ > 0) {
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int64_t expected_time_taken = iterations * 1000;
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base::TimeMillis time_taken = base::GetWallTimeMs() - start;
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while (time_taken.count() < expected_time_taken) {
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std::this_thread::sleep_for(
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base::TimeMillis(expected_time_taken - time_taken.count()));
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time_taken = base::GetWallTimeMs() - start;
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}
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}
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trace_writer_->Flush(messages_to_emit > 0 ? [] {} : callback);
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}
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}
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} // namespace perfetto
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