lebeg commented on a change in pull request #10911: Fix engine stop/start
URL: https://github.com/apache/incubator-mxnet/pull/10911#discussion_r195025583
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File path: src/engine/threaded_engine_pooled.cc
##########
@@ -42,14 +43,38 @@ namespace engine {
*/
class ThreadedEnginePooled : public ThreadedEngine {
public:
- ThreadedEnginePooled() :
- thread_pool_(kNumWorkingThreads, [this]() { ThreadWorker(&task_queue_);
}),
- io_thread_pool_(1, [this]() { ThreadWorker(&io_task_queue_); }) {}
+ ThreadedEnginePooled() {
+ this->Start();
+ }
~ThreadedEnginePooled() noexcept(false) {
- streams_.Finalize();
- task_queue_.SignalForKill();
- io_task_queue_.SignalForKill();
+ StopNoWait();
+ }
+
+ void StopNoWait() {
+ streams_->Finalize();
+ task_queue_->SignalForKill();
+ io_task_queue_->SignalForKill();
+ task_queue_ = nullptr;
+ io_task_queue_ = nullptr;
+ thread_pool_ = nullptr;
+ io_thread_pool_ = nullptr;
+ streams_ = nullptr;
+ }
+
+ void Stop() override {
+ WaitForAll();
+ StopNoWait();
+ }
+
+ void Start() override {
+ streams_.reset(new StreamManager<kMaxNumGpus, kNumStreamsPerGpu>());
+ task_queue_.reset(new dmlc::ConcurrentBlockingQueue<OprBlock*>());
+ io_task_queue_.reset(new dmlc::ConcurrentBlockingQueue<OprBlock*>());
+ thread_pool_.reset(new ThreadPool(kNumWorkingThreads, [this]() {
Review comment:
Shouldn't this contain change to [another constructor of
ThreadPool](https://github.com/apache/incubator-mxnet/blob/master/src/engine/thread_pool.h#L68-L70)?
Only the one accepting `std::shared_ptr<dmlc::ManualEvent> ready_event` will
wait until ready, which might be the issue fixed in
https://github.com/apache/incubator-mxnet/pull/8995.
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