From 9db6c7628c2374cf3fd628521c5ac8efdb9bf3af Mon Sep 17 00:00:00 2001 From: liutiexing <74819124+liutiexing@users.noreply.github.com> Date: Thu, 21 Apr 2022 18:20:05 +0800 Subject: [PATCH] WorkQueue supports always_spinning option (#42029) * WorkQueue supports always_spinning option * update * update --- .../new_executor/interpretercore_util.h | 3 +++ .../workqueue/nonblocking_threadpool.h | 15 +++++++++++--- .../new_executor/workqueue/workqueue.cc | 12 ++++++++--- .../new_executor/workqueue/workqueue.h | 9 +++++++-- .../new_executor/workqueue/workqueue_test.cc | 20 +++++++++++++++++++ 5 files changed, 51 insertions(+), 8 deletions(-) diff --git a/paddle/fluid/framework/new_executor/interpretercore_util.h b/paddle/fluid/framework/new_executor/interpretercore_util.h index 56683330ee..60ac3702f4 100644 --- a/paddle/fluid/framework/new_executor/interpretercore_util.h +++ b/paddle/fluid/framework/new_executor/interpretercore_util.h @@ -63,6 +63,7 @@ class AsyncWorkQueue { group_options.emplace_back(/*name*/ "HostTasks", /*num_threads*/ host_num_threads, /*allow_spinning*/ true, + /*always_spinning*/ false, /*track_task*/ false, /*detached*/ true, /*events_waiter*/ waiter); @@ -70,6 +71,7 @@ class AsyncWorkQueue { group_options.emplace_back(/*name*/ "DeviceKernelLaunch", /*num_threads*/ deivce_num_threads, /*allow_spinning*/ true, + /*always_spinning*/ true, /*track_task*/ false, /*detached*/ true, /*events_waiter*/ waiter); @@ -77,6 +79,7 @@ class AsyncWorkQueue { group_options.emplace_back(/*name*/ "Prepare", /*num_threads*/ 1, /*allow_spinning*/ true, + /*always_spinning*/ false, /*track_task*/ false, /*detached*/ true, /*events_waiter*/ waiter); diff --git a/paddle/fluid/framework/new_executor/workqueue/nonblocking_threadpool.h b/paddle/fluid/framework/new_executor/workqueue/nonblocking_threadpool.h index a599bc41f6..559eb6a749 100644 --- a/paddle/fluid/framework/new_executor/workqueue/nonblocking_threadpool.h +++ b/paddle/fluid/framework/new_executor/workqueue/nonblocking_threadpool.h @@ -29,13 +29,13 @@ class ThreadPoolTempl { typedef RunQueue Queue; ThreadPoolTempl(const std::string& name, int num_threads, bool allow_spinning, - Environment env = Environment()) + bool always_spinning, Environment env = Environment()) : env_(env), allow_spinning_(allow_spinning), + always_spinning_(always_spinning), global_steal_partition_(EncodePartition(0, num_threads_)), blocked_(0), num_tasks_(0), - spinning_(0), done_(false), cancelled_(false), ec_(num_threads), @@ -236,11 +236,11 @@ class ThreadPoolTempl { Environment env_; const bool allow_spinning_; + const bool always_spinning_; std::vector> all_coprimes_; unsigned global_steal_partition_; std::atomic blocked_; std::atomic num_tasks_; - std::atomic spinning_; std::atomic done_; std::atomic cancelled_; EventCount ec_; @@ -417,6 +417,15 @@ class ThreadPoolTempl { ec_.Notify(true); return false; } + + // Cancel wait if always_spinning_ + if (always_spinning_) { + ec_.CancelWait(); + blocked_--; + return true; + } + + // Wait for work platform::RecordEvent record("WaitForWork", platform::TracerEventType::UserDefined, 10); ec_.CommitWait(waiter); diff --git a/paddle/fluid/framework/new_executor/workqueue/workqueue.cc b/paddle/fluid/framework/new_executor/workqueue/workqueue.cc index b8dfcad187..0f0de8ef9b 100644 --- a/paddle/fluid/framework/new_executor/workqueue/workqueue.cc +++ b/paddle/fluid/framework/new_executor/workqueue/workqueue.cc @@ -21,6 +21,10 @@ void WorkQueueOptions::Validate() const { name.find('_'), std::string::npos, platform::errors::InvalidArgument( "WorkQueueOptions.name shouldn't contain an underline")); + PADDLE_ENFORCE_EQ( + allow_spinning == false && always_spinning == true, false, + platform::errors::InvalidArgument("WorkQueueOptions.allow_spinning must " + "be true when always_spinning is set")); } namespace { @@ -40,7 +44,8 @@ class WorkQueueImpl : public WorkQueue { options.events_waiter->RegisterEvent(kQueueDestructEvent); } queue_ = new NonblockingThreadPool(options_.name, options_.num_threads, - options_.allow_spinning); + options_.allow_spinning, + options_.always_spinning); } virtual ~WorkQueueImpl() { @@ -127,8 +132,9 @@ WorkQueueGroupImpl::WorkQueueGroupImpl( destruct_notifier_ = options.events_waiter->RegisterEvent(kQueueDestructEvent); } - queues_[idx] = new (&queues_storage_[idx]) NonblockingThreadPool( - options.name, options.num_threads, options.allow_spinning); + queues_[idx] = new (&queues_storage_[idx]) + NonblockingThreadPool(options.name, options.num_threads, + options.allow_spinning, options.always_spinning); } } diff --git a/paddle/fluid/framework/new_executor/workqueue/workqueue.h b/paddle/fluid/framework/new_executor/workqueue/workqueue.h index 0101461658..e9c658e3b9 100644 --- a/paddle/fluid/framework/new_executor/workqueue/workqueue.h +++ b/paddle/fluid/framework/new_executor/workqueue/workqueue.h @@ -64,11 +64,12 @@ struct WorkQueueOptions { } WorkQueueOptions(const std::string& name, size_t num_threads, - bool allow_spinning, bool track_task, bool detached, - EventsWaiter* waiter) + bool allow_spinning, bool always_spinning, bool track_task, + bool detached, EventsWaiter* waiter) : name(name), num_threads(num_threads), allow_spinning(allow_spinning), + always_spinning(always_spinning), track_task(track_task), detached(detached), events_waiter(waiter) { @@ -80,7 +81,11 @@ struct WorkQueueOptions { std::string name; size_t num_threads; + // Worker threads will spin for a while if this flag is set. bool allow_spinning; + // Worker threads will never sleep if this flag is set. + // Better performance vs. higher CPU utilization. + bool always_spinning{false}; // If you need to blocking the calling thread to wait "queue empty", set // track_task = true and set events_waiter. EventsWaiter::WaitEvent will // block the calling thread until any of events (including "queue empty") diff --git a/paddle/fluid/framework/new_executor/workqueue/workqueue_test.cc b/paddle/fluid/framework/new_executor/workqueue/workqueue_test.cc index d8e09fb6ba..857eaead5b 100644 --- a/paddle/fluid/framework/new_executor/workqueue/workqueue_test.cc +++ b/paddle/fluid/framework/new_executor/workqueue/workqueue_test.cc @@ -48,6 +48,7 @@ TEST(WorkQueue, TestSingleThreadedWorkQueue) { EventsWaiter events_waiter; WorkQueueOptions options(/*name*/ "SingleThreadedWorkQueueForTesting", /*num_threads*/ 1, /*allow_spinning*/ true, + /*always_spinning*/ true, /*track_task*/ true, /*detached*/ true, &events_waiter); auto work_queue = CreateSingleThreadedWorkQueue(options); @@ -69,6 +70,15 @@ TEST(WorkQueue, TestSingleThreadedWorkQueue) { EXPECT_EQ(finished.load(), true); EXPECT_EQ(counter.load(), kLoopNum); EXPECT_EQ(handle.get(), 1234); + work_queue.reset(); + // Test default_options with no spinning + WorkQueueOptions default_options("SingleThreadedWorkQueueForTesting", + /*num_threads*/ 1, + /*allow_spinning*/ false, + /*track_task*/ false); + work_queue = CreateSingleThreadedWorkQueue(default_options); + handle = work_queue->AddAwaitableTask([]() { return 5678; }); + EXPECT_EQ(handle.get(), 5678); } TEST(WorkQueue, TestMultiThreadedWorkQueue) { @@ -85,6 +95,7 @@ TEST(WorkQueue, TestMultiThreadedWorkQueue) { EventsWaiter events_waiter; WorkQueueOptions options(/*name*/ "MultiThreadedWorkQueueForTesting", /*num_threads*/ 10, /*allow_spinning*/ true, + /*always_spinning*/ true, /*track_task*/ true, /*detached*/ false, &events_waiter); auto work_queue = CreateMultiThreadedWorkQueue(options); @@ -115,6 +126,13 @@ TEST(WorkQueue, TestMultiThreadedWorkQueue) { }); work_queue.reset(); waiter_thread.join(); + // Forever spin unittest + WorkQueueOptions default_options("MultiThreadedWorkQueueForTesting", + /*num_threads*/ 10, /*allow_spinning*/ false, + /*track_task*/ false); + work_queue = CreateMultiThreadedWorkQueue(default_options); + auto handle = work_queue->AddAwaitableTask([]() { return 5678; }); + EXPECT_EQ(handle.get(), 5678); } TEST(WorkQueue, TestWorkQueueGroup) { @@ -130,10 +148,12 @@ TEST(WorkQueue, TestWorkQueueGroup) { EventsWaiter events_waiter; WorkQueueOptions sq_options(/*name*/ "SingleThreadedWorkQueueForTesting", /*num_threads*/ 1, /*allow_spinning*/ true, + /*always_spinning*/ true, /*track_task*/ true, /*detached*/ false, &events_waiter); WorkQueueOptions mq_options(/*name*/ "MultiThreadedWorkQueueForTesting", /*num_threads*/ 10, /*allow_spinning*/ true, + /*always_spinning*/ true, /*track_task*/ true, /*detached*/ false, &events_waiter); auto queue_group = CreateWorkQueueGroup({sq_options, mq_options}); -- GitLab