| /* Copyright 2015 The TensorFlow Authors. All Rights Reserved. |
| |
| 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. |
| ==============================================================================*/ |
| |
| // See docs in ../ops/data_flow_ops.cc. |
| |
| #include <algorithm> |
| #include <deque> |
| #include <vector> |
| |
| #include "tensorflow/core/framework/node_def.pb.h" |
| #include "tensorflow/core/framework/tensor.h" |
| #include "tensorflow/core/framework/tensor_shape.h" |
| #include "tensorflow/core/framework/types.h" |
| #include "tensorflow/core/kernels/fifo_queue.h" |
| #include "tensorflow/core/kernels/queue_base.h" |
| #include "tensorflow/core/lib/core/errors.h" |
| #include "tensorflow/core/platform/logging.h" |
| #include "tensorflow/core/platform/mutex.h" |
| #include "tensorflow/core/platform/types.h" |
| #include "tensorflow/core/util/batch_util.h" |
| |
| namespace tensorflow { |
| |
| FIFOQueue::FIFOQueue(int capacity, const DataTypeVector& component_dtypes, |
| const std::vector<TensorShape>& component_shapes, |
| const string& name) |
| : TypedQueue(capacity, component_dtypes, component_shapes, name) {} |
| |
| void FIFOQueue::DequeueLocked(OpKernelContext* ctx, Tuple* tuple) { |
| DCHECK_GT(queues_[0].size(), size_t{0}); |
| (*tuple).reserve(num_components()); |
| for (int i = 0; i < num_components(); ++i) { |
| (*tuple).push_back(*queues_[i][0].AccessTensor(ctx)); |
| queues_[i].pop_front(); |
| } |
| } |
| |
| void FIFOQueue::TryEnqueue(const Tuple& tuple, OpKernelContext* ctx, |
| DoneCallback callback) { |
| CancellationManager* cm = ctx->cancellation_manager(); |
| CancellationToken token = cm->get_cancellation_token(); |
| bool already_cancelled; |
| { |
| mutex_lock l(mu_); |
| already_cancelled = !cm->RegisterCallback( |
| token, [this, cm, token]() { Cancel(kEnqueue, cm, token); }); |
| if (!already_cancelled) { |
| enqueue_attempts_.emplace_back( |
| 1, callback, ctx, cm, token, |
| [tuple, this](Attempt* attempt) EXCLUSIVE_LOCKS_REQUIRED(mu_) { |
| if (closed_) { |
| attempt->context->SetStatus( |
| errors::Cancelled("FIFOQueue '", name_, "' is closed.")); |
| return kComplete; |
| } |
| if (queues_[0].size() < static_cast<size_t>(capacity_)) { |
| for (int i = 0; i < num_components(); ++i) { |
| queues_[i].push_back(PersistentTensor(tuple[i])); |
| } |
| return kComplete; |
| } else { |
| return kNoProgress; |
| } |
| }); |
| } |
| } |
| if (!already_cancelled) { |
| FlushUnlocked(); |
| } else { |
| ctx->SetStatus(errors::Cancelled("Enqueue operation was cancelled")); |
| callback(); |
| } |
| } |
| |
| /* static */ |
| Status FIFOQueue::GetElementComponentFromBatch(const FIFOQueue::Tuple& tuple, |
| int64 index, int component, |
| OpKernelContext* ctx, |
| PersistentTensor* out_tensor) { |
| TensorShape element_shape(tuple[component].shape()); |
| element_shape.RemoveDim(0); |
| Tensor* element_access = nullptr; |
| TF_RETURN_IF_ERROR(ctx->allocate_persistent( |
| tuple[component].dtype(), element_shape, out_tensor, &element_access)); |
| TF_RETURN_IF_ERROR( |
| batch_util::CopySliceToElement(tuple[component], element_access, index)); |
| return Status::OK(); |
| } |
| |
| void FIFOQueue::TryEnqueueMany(const Tuple& tuple, OpKernelContext* ctx, |
| DoneCallback callback) { |
| const int64 batch_size = tuple[0].dim_size(0); |
| if (batch_size == 0) { |
| callback(); |
| return; |
| } |
| |
| CancellationManager* cm = ctx->cancellation_manager(); |
| CancellationToken token = cm->get_cancellation_token(); |
| bool already_cancelled; |
| { |
| mutex_lock l(mu_); |
| already_cancelled = !cm->RegisterCallback( |
| token, [this, cm, token]() { Cancel(kEnqueue, cm, token); }); |
| if (!already_cancelled) { |
| enqueue_attempts_.emplace_back( |
| batch_size, callback, ctx, cm, token, |
| [tuple, this](Attempt* attempt) EXCLUSIVE_LOCKS_REQUIRED(mu_) { |
| if (closed_) { |
| attempt->context->SetStatus( |
| errors::Cancelled("FIFOQueue '", name_, "' is closed.")); |
| return kComplete; |
| } |
| RunResult result = kNoProgress; |
| while (queues_[0].size() < static_cast<size_t>(capacity_)) { |
| result = kProgress; |
| const int64 index = |
| tuple[0].dim_size(0) - attempt->elements_requested; |
| for (int i = 0; i < num_components(); ++i) { |
| PersistentTensor element; |
| attempt->context->SetStatus(GetElementComponentFromBatch( |
| tuple, index, i, attempt->context, &element)); |
| if (!attempt->context->status().ok()) return kComplete; |
| queues_[i].push_back(element); |
| } |
| --attempt->elements_requested; |
| if (attempt->elements_requested == 0) { |
| return kComplete; |
| } |
| } |
| return result; |
| }); |
| } |
| } |
| if (!already_cancelled) { |
| FlushUnlocked(); |
| } else { |
| ctx->SetStatus(errors::Cancelled("Enqueue operation was cancelled")); |
| callback(); |
| } |
| } |
| |
| void FIFOQueue::TryDequeue(OpKernelContext* ctx, CallbackWithTuple callback) { |
| CancellationManager* cm = ctx->cancellation_manager(); |
| CancellationToken token = cm->get_cancellation_token(); |
| bool already_cancelled; |
| { |
| mutex_lock l(mu_); |
| already_cancelled = !cm->RegisterCallback( |
| token, [this, cm, token]() { Cancel(kDequeue, cm, token); }); |
| if (!already_cancelled) { |
| // TODO(josh11b): This makes two copies of callback, avoid this if possible. |
| dequeue_attempts_.emplace_back( |
| 1, [callback]() { callback(Tuple()); }, ctx, cm, token, |
| [callback, this](Attempt* attempt) EXCLUSIVE_LOCKS_REQUIRED(mu_) { |
| const int64 queue_size = queues_[0].size(); |
| if (closed_ && queue_size == 0) { |
| attempt->context->SetStatus(errors::OutOfRange( |
| "FIFOQueue '", name_, "' is closed and has ", |
| "insufficient elements (requested ", 1, ", current size ", |
| queue_size, ")")); |
| return kComplete; |
| } |
| if (queue_size > 0) { |
| Tuple tuple; |
| DequeueLocked(attempt->context, &tuple); |
| attempt->done_callback = [callback, tuple]() { callback(tuple); }; |
| return kComplete; |
| } else { |
| return kNoProgress; |
| } |
| }); |
| } |
| } |
| if (!already_cancelled) { |
| FlushUnlocked(); |
| } else { |
| ctx->SetStatus(errors::Cancelled("Dequeue operation was cancelled")); |
| callback(Tuple()); |
| } |
| } |
| |
| void FIFOQueue::TryDequeueMany(int num_elements, OpKernelContext* ctx, |
| bool allow_small_batch, |
| CallbackWithTuple callback) { |
| if (!specified_shapes()) { |
| ctx->SetStatus(errors::InvalidArgument( |
| "FIFOQueue's DequeueMany and DequeueUpTo require the " |
| "components to have specified shapes.")); |
| callback(Tuple()); |
| return; |
| } |
| if (num_elements == 0) { |
| Tuple tuple; |
| tuple.reserve(num_components()); |
| for (int i = 0; i < num_components(); ++i) { |
| // TODO(josh11b,misard): Switch to allocate_output(). Problem is |
| // this breaks the abstraction boundary since we don't *really* |
| // know if and how the Tensors in the tuple we pass to callback |
| // correspond to the outputs of *ctx. For example, the |
| // ReaderRead Op uses TryDequeue() to get a filename out of a |
| // queue that is used internally by the reader and is not |
| // associated with any output of the ReaderRead. |
| // mrry@ adds: |
| // Maybe we need to pass a std::function<Tensor*(...)> (or |
| // better signature) that calls the appropriate allocator |
| // function in addition to ctx? (Or support a shim Allocator |
| // that has an internal OpKernelContext*, and dispatches to the |
| // appropriate method?) |
| // misard@ adds: |
| // I don't see that a std::function would help. The problem is |
| // that at this point (allocation time) the system doesn't know |
| // what is going to happen to the element read out of the |
| // queue. As long as we keep the generality that TensorFlow Ops |
| // do their own dynamic allocation in arbitrary C++ code, we |
| // need to preserve robustness to allocating output Tensors with |
| // the 'wrong' attributes, and fixing up with a copy. The only |
| // improvement I can see here in the future would be to support |
| // an optimized case where the queue 'knows' what attributes to |
| // use, and plumbs them through here. |
| Tensor element; |
| Status status = ctx->allocate_temp(component_dtypes_[i], |
| ManyOutShape(i, 0), &element); |
| if (!status.ok()) { |
| ctx->SetStatus(status); |
| callback(Tuple()); |
| return; |
| } |
| tuple.emplace_back(element); |
| } |
| callback(tuple); |
| return; |
| } |
| |
| CancellationManager* cm = ctx->cancellation_manager(); |
| CancellationToken token = cm->get_cancellation_token(); |
| bool already_cancelled; |
| { |
| mutex_lock l(mu_); |
| already_cancelled = !cm->RegisterCallback( |
| token, [this, cm, token]() { Cancel(kDequeue, cm, token); }); |
| if (!already_cancelled) { |
| // TODO(josh11b): This makes two copies of callback, avoid this if possible. |
| dequeue_attempts_.emplace_back( |
| num_elements, [callback]() { callback(Tuple()); }, ctx, cm, token, |
| [callback, allow_small_batch, |
| this](Attempt* attempt) EXCLUSIVE_LOCKS_REQUIRED(mu_) { |
| int64 queue_size = queues_[0].size(); |
| |
| if (closed_ && queue_size < attempt->elements_requested) { |
| // If we don't have enough for a full dequeue, we have |
| // to reset the attempt tuple. |
| if (!attempt->tuple.empty()) { |
| // Restore already-dequeued elements to the front of the |
| // queue. |
| for (int64 i = attempt->tuple[0].dim_size(0) - |
| attempt->elements_requested - 1; |
| i >= 0; --i) { |
| for (int j = 0; j < num_components(); ++j) { |
| PersistentTensor element; |
| Status s = GetElementComponentFromBatch( |
| attempt->tuple, i, j, attempt->context, &element); |
| if (!s.ok()) { |
| attempt->context->SetStatus( |
| errors::DataLoss("Failed to restore element from " |
| "partially-dequeued batch " |
| "to FIFOQueue: ", |
| s.error_message())); |
| } |
| queues_[j].push_front(element); |
| } |
| } |
| } |
| if (allow_small_batch && !queues_[0].empty()) { |
| // Request all remaining elements in the queue. |
| queue_size = queues_[0].size(); |
| attempt->tuple.clear(); |
| attempt->elements_requested = queue_size; |
| } else { |
| if (allow_small_batch) { |
| // There may be some other attempts containing |
| // values. If so, we'll yield and wait for them |
| // to add elements to the queue. |
| if (!enqueue_attempts_.empty()) return kProgress; |
| } |
| if (attempt->context->status().ok()) { |
| attempt->context->SetStatus(errors::OutOfRange( |
| "FIFOQueue '", name_, "' is closed and has ", |
| "insufficient elements (requested ", |
| attempt->elements_requested, ", current size ", |
| queue_size, ")")); |
| } |
| return kComplete; |
| } |
| } |
| |
| RunResult result = kNoProgress; |
| for (; queue_size > 0; --queue_size) { |
| if (attempt->tuple.empty()) { |
| // Only allocate tuple when we have something to dequeue |
| // so we don't use excessive memory when there are many |
| // blocked dequeue attempts waiting. |
| attempt->tuple.reserve(num_components()); |
| for (int i = 0; i < num_components(); ++i) { |
| const TensorShape shape = |
| ManyOutShape(i, attempt->elements_requested); |
| Tensor element; |
| attempt->context->SetStatus(attempt->context->allocate_temp( |
| component_dtypes_[i], shape, &element)); |
| if (!attempt->context->status().ok()) return kComplete; |
| attempt->tuple.emplace_back(element); |
| } |
| } |
| result = kProgress; |
| Tuple tuple; |
| DequeueLocked(attempt->context, &tuple); |
| const int64 index = |
| attempt->tuple[0].dim_size(0) - attempt->elements_requested; |
| for (int i = 0; i < num_components(); ++i) { |
| attempt->context->SetStatus(batch_util::CopyElementToSlice( |
| std::move(tuple[i]), &attempt->tuple[i], index)); |
| if (!attempt->context->status().ok()) return kComplete; |
| } |
| tuple.clear(); |
| --attempt->elements_requested; |
| if (attempt->elements_requested == 0) { |
| tuple = attempt->tuple; |
| attempt->done_callback = [callback, tuple]() { |
| callback(tuple); |
| }; |
| return kComplete; |
| } |
| } |
| return result; |
| }); |
| } |
| } |
| if (!already_cancelled) { |
| FlushUnlocked(); |
| } else { |
| ctx->SetStatus(errors::Cancelled("Dequeue operation was cancelled")); |
| callback(Tuple()); |
| } |
| } |
| |
| Status FIFOQueue::MatchesNodeDef(const NodeDef& node_def) { |
| if (!MatchesNodeDefOp(node_def, "FIFOQueue").ok() && |
| !MatchesNodeDefOp(node_def, "FIFOQueueV2").ok()) { |
| return errors::InvalidArgument("Expected FIFOQueue, found ", node_def.op()); |
| } |
| TF_RETURN_IF_ERROR(MatchesNodeDefCapacity(node_def, capacity_)); |
| TF_RETURN_IF_ERROR(MatchesNodeDefTypes(node_def)); |
| TF_RETURN_IF_ERROR(MatchesNodeDefShapes(node_def)); |
| return Status::OK(); |
| } |
| |
| // Defines a FIFOQueueOp, which produces a Queue (specifically, one |
| // backed by FIFOQueue) that persists across different graph |
| // executions, and sessions. Running this op produces a single-element |
| // tensor of handles to Queues in the corresponding device. |
| FIFOQueueOp::FIFOQueueOp(OpKernelConstruction* context) |
| : TypedQueueOp(context) { |
| OP_REQUIRES_OK(context, context->GetAttr("shapes", &component_shapes_)); |
| } |
| |
| Status FIFOQueueOp::CreateResource(QueueInterface** ret) { |
| FIFOQueue* queue = new FIFOQueue(capacity_, component_types_, |
| component_shapes_, cinfo_.name()); |
| return CreateTypedQueue(queue, ret); |
| } |
| |
| } // namespace tensorflow |
