You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
69 lines
2.3 KiB
69 lines
2.3 KiB
// Copyright (c) 2018 PaddlePaddle 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.
|
|
|
|
#pragma once
|
|
#include <condition_variable> // NOLINT
|
|
#include <deque>
|
|
#include <map>
|
|
#include <memory>
|
|
#include <mutex> // NOLINT
|
|
#include "paddle/fluid/memory/allocation/allocator.h"
|
|
#include "paddle/fluid/platform/lock_guard_ptr.h"
|
|
namespace paddle {
|
|
namespace platform {
|
|
|
|
/*! \brief the TemporaryAllocator is used to alloc the temporary allocation
|
|
* which used by CUDA's async operation.
|
|
*
|
|
* The TemporaryAllocator contains a temp_allocation_queue which
|
|
* is used to store the temporary allocations. The allocation, which is
|
|
* allocated by TemporaryAllocator, is a unique_ptr, and when it is not held
|
|
* by any variable, it will be pushed into the temp_allocation_queue.
|
|
*
|
|
* There is one opportunity to free the allocations of temp_allocation_queue:
|
|
* - when the allocation size of opportunities exceeds a certain threshold
|
|
* (defined by FLAGS_limit_of_tmp_allocation).
|
|
*
|
|
* */
|
|
class TemporaryAllocator : public memory::allocation::Allocator {
|
|
public:
|
|
explicit TemporaryAllocator(platform::Place place);
|
|
|
|
void Release(const std::function<void()> &callback);
|
|
|
|
size_t TemporaryAllocationQueueSize();
|
|
|
|
bool IsAllocThreadSafe() const override;
|
|
|
|
void SetCallback(const std::function<void()> &callback);
|
|
|
|
protected:
|
|
void FreeImpl(memory::allocation::Allocation *allocation) override;
|
|
|
|
memory::allocation::Allocation *AllocateImpl(size_t size) override;
|
|
|
|
private:
|
|
platform::Place place_;
|
|
// When the allocation is not held by any variable, it should be placed
|
|
// to temp_mem_map immediately.
|
|
std::unique_ptr<std::multimap<size_t, memory::allocation::Allocation *>>
|
|
temp_mem_map_{nullptr};
|
|
std::mutex mtx_;
|
|
size_t wait_delete_mem_{0};
|
|
std::function<void()> callback_;
|
|
};
|
|
|
|
} // namespace platform
|
|
} // namespace paddle
|