Merge pull request #13864 from jacquesqiao/py-reader-add-test-mode

reader block queue add test mode

paddle/fluid/operators/reader/blocking_queue.h

@@ -31,8 +31,8 @@ class BlockingQueue {
   // is a workaround and a simplified version of framework::Channel as it
   // doesn't support GPU and it implements on buffered blocking queue.
  public:
-  explicit BlockingQueue(size_t capacity)
-      : capacity_(capacity), closed_(false) {
+  explicit BlockingQueue(size_t capacity, bool speed_test_mode = false)
+      : capacity_(capacity), speed_test_mode_(speed_test_mode), closed_(false) {
     PADDLE_ENFORCE_GT(
         capacity_, 0,
         "The capacity of a reader::BlockingQueue must be greater than 0.");
@@ -72,7 +72,9 @@ class BlockingQueue {
     if (!queue_.empty()) {
       PADDLE_ENFORCE_NOT_NULL(elem);
       *elem = queue_.front();
-      queue_.pop_front();
+      if (LIKELY(!speed_test_mode_)) {
+        queue_.pop_front();
+      }
       send_cv_.notify_one();
       return true;
     } else {
@@ -114,6 +116,7 @@ class BlockingQueue {
 
  private:
   size_t capacity_;
+  bool speed_test_mode_;
   bool closed_;
   std::deque<T> queue_;
 

paddle/fluid/operators/reader/lod_tensor_blocking_queue.h

@@ -33,8 +33,9 @@ class LoDTensorBlockingQueue {
 
  private:
   LoDTensorBlockingQueue(size_t capacity,
-                         const std::vector<framework::DDim>& dims)
-      : queue_(capacity), dims_(dims) {}
+                         const std::vector<framework::DDim>& dims,
+                         bool speed_test_mode = false)
+      : queue_(capacity, speed_test_mode), dims_(dims) {}
 
  public:
   bool Push(const std::vector<framework::LoDTensor>& lod_tensor_vec) {
@@ -69,11 +70,12 @@ class LoDTensorBlockingQueue {
 
 class LoDTensorBlockingQueueHolder {
  public:
-  void InitOnce(size_t capacity, const std::vector<framework::DDim>& dims) {
+  void InitOnce(size_t capacity, const std::vector<framework::DDim>& dims,
+                bool speed_test_mode = false) {
     PADDLE_ENFORCE(
         queue_ == nullptr,
         "LoDTensorBlockingQueueHolder::InitOnce() can only be called once");
-    queue_.reset(new LoDTensorBlockingQueue(capacity, dims));
+    queue_.reset(new LoDTensorBlockingQueue(capacity, dims, speed_test_mode));
   }
 
   inline const std::shared_ptr<LoDTensorBlockingQueue>& GetQueue() const {

paddle/fluid/operators/reader/reader_blocking_queue_test.cc

@@ -217,3 +217,27 @@ TEST(BlockingQueue, MyClassTest) {
   q.Receive(&b);
   EXPECT_EQ(a.val_, b.val_);
 }
+
+TEST(BlockingQueue, speed_test_mode) {
+  size_t queue_size = 10;
+  BlockingQueue<size_t> q1(queue_size, false);
+  for (size_t i = 0; i < queue_size; ++i) {
+    q1.Send(i);
+  }
+  size_t b;
+  for (size_t i = 0; i < queue_size; ++i) {
+    q1.Receive(&b);
+    EXPECT_EQ(b, i);
+  }
+  EXPECT_EQ(q1.Size(), 0);
+
+  BlockingQueue<size_t> q2(queue_size, true);
+  for (size_t i = 0; i < queue_size; ++i) {
+    q2.Send(i);
+  }
+  for (size_t i = 0; i < queue_size; ++i) {
+    q2.Receive(&b);
+    EXPECT_EQ(b, 0);
+  }
+  EXPECT_EQ(q2.Size(), queue_size);
+}

paddle/fluid/platform/enforce.h

@@ -130,6 +130,13 @@ struct EOFException : public std::exception {
 #define UNLIKELY(condition) (condition == 0)
 #endif
 
+#if !defined(_WIN32)
+#define LIKELY(condition) __builtin_expect(static_cast<bool>(condition), 1)
+#else
+// there is no equivalent intrinsics in msvc.
+#define LIKELY(condition) (condition != 0)
+#endif
+
 template <typename... Args>
 inline typename std::enable_if<sizeof...(Args) != 0, void>::type throw_on_error(
     bool stat, const Args&... args) {

paddle/fluid/pybind/pybind.cc

@@ -57,6 +57,10 @@ limitations under the License. */
 
 #include "pybind11/stl.h"
 
+DEFINE_bool(reader_queue_speed_test_mode, false,
+            "If set true, the queue.pop will only get data from queue but not "
+            "remove the data from queue for speed testing");
+
 // disable auto conversion to list in Python
 PYBIND11_MAKE_OPAQUE(paddle::framework::LoDTensorArray);
 
@@ -380,7 +384,8 @@ All parameter, weight, gradient are variables in Paddle.
                                return make_ddim(shape);
                              });
               auto *holder = var.GetMutable<LoDTensorBlockingQueueHolder>();
-              holder->InitOnce(capacity, dims);
+              holder->InitOnce(capacity, dims,
+                               FLAGS_reader_queue_speed_test_mode);
               return holder->GetQueue();
             },
         py::return_value_policy::copy);

python/paddle/fluid/__init__.py

@@ -113,7 +113,8 @@ def __bootstrap__():
         'use_pinned_memory', 'check_nan_inf', 'benchmark', 'warpctc_dir',
         'eager_delete_scope', 'use_mkldnn', 'initial_cpu_memory_in_mb',
         'init_allocated_mem', 'free_idle_memory', 'paddle_num_threads',
-        "dist_threadpool_size", 'cpu_deterministic', 'eager_delete_tensor_gb'
+        'dist_threadpool_size', 'cpu_deterministic', 'eager_delete_tensor_gb',
+        'reader_queue_speed_test_mode'
     ]
     if core.is_compiled_with_dist():
         read_env_flags.append('rpc_deadline')