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/*
* Copyright (C) 2023-2024 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#pragma once
#include "shared/source/helpers/constants.h"
#include "shared/source/helpers/non_copyable_or_moveable.h"
#include "shared/source/utilities/stackvec.h"
#include <functional>
#include <iterator>
#include <memory>
#include <mutex>
#include <vector>
namespace NEO {
class GraphicsAllocation;
class HeapAllocator;
class MemoryManager;
template <typename PoolT>
struct SmallBuffersParams {
protected:
static constexpr auto aggregatedSmallBuffersPoolSize = 2 * MemoryConstants::megaByte;
static constexpr auto smallBufferThreshold = 1 * MemoryConstants::megaByte;
static constexpr auto chunkAlignment = MemoryConstants::pageSize64k;
static constexpr auto startingOffset = chunkAlignment;
};
template <typename PoolT, typename BufferType, typename BufferParentType = BufferType>
struct AbstractBuffersPool : public SmallBuffersParams<PoolT>, public NonCopyableClass {
// The prototype of a function allocating the `mainStorage` is not specified.
// That would be an unnecessary limitation here - it is completely up to derived class implementation.
// Perhaps the allocating function needs to leverage `HeapAllocator::allocate()` and also
// a BufferType-dependent function reserving chunks within `mainStorage`.
// Example: see `NEO::Context::BufferPool::allocate()`
using Params = SmallBuffersParams<PoolT>;
using Params::aggregatedSmallBuffersPoolSize;
using Params::chunkAlignment;
using Params::smallBufferThreshold;
using Params::startingOffset;
using AllocsVecCRef = const StackVec<NEO::GraphicsAllocation *, 1> &;
using OnChunkFreeCallback = void (PoolT::*)(uint64_t offset, size_t size);
AbstractBuffersPool(MemoryManager *memoryManager, OnChunkFreeCallback onChunkFreeCallback);
AbstractBuffersPool(AbstractBuffersPool<PoolT, BufferType, BufferParentType> &&bufferPool);
AbstractBuffersPool &operator=(AbstractBuffersPool &&) = delete;
virtual ~AbstractBuffersPool() = default;
void tryFreeFromPoolBuffer(BufferParentType *possiblePoolBuffer, size_t offset, size_t size);
bool isPoolBuffer(const BufferParentType *buffer) const;
void drain();
// Derived class needs to provide its own implementation of getAllocationsVector().
// This is a CRTP-replacement for virtual functions.
AllocsVecCRef getAllocationsVector() {
return static_cast<PoolT *>(this)->getAllocationsVector();
}
MemoryManager *memoryManager{nullptr};
std::unique_ptr<BufferType> mainStorage;
std::unique_ptr<HeapAllocator> chunkAllocator;
std::vector<std::pair<uint64_t, size_t>> chunksToFree;
OnChunkFreeCallback onChunkFreeCallback = nullptr;
};
template <typename BuffersPoolType, typename BufferType, typename BufferParentType = BufferType>
class AbstractBuffersAllocator : public SmallBuffersParams<BuffersPoolType> {
// The prototype of a function allocating buffers from the pool is not specified (see similar comment in `AbstractBufersPool`).
// By common sense, in order to allocate buffers from the pool the function should leverage a call provided by `BuffersPoolType`.
// Example: see `NEO::Context::BufferPoolAllocator::allocateBufferFromPool()`.
public:
using Params = SmallBuffersParams<BuffersPoolType>;
using Params::aggregatedSmallBuffersPoolSize;
using Params::chunkAlignment;
using Params::smallBufferThreshold;
using Params::startingOffset;
static_assert(aggregatedSmallBuffersPoolSize > smallBufferThreshold, "Largest allowed buffer needs to fit in pool");
void releasePools() { this->bufferPools.clear(); }
bool isPoolBuffer(const BufferParentType *buffer) const;
void tryFreeFromPoolBuffer(BufferParentType *possiblePoolBuffer, size_t offset, size_t size);
protected:
inline bool isSizeWithinThreshold(size_t size) const { return smallBufferThreshold >= size; }
void tryFreeFromPoolBuffer(BufferParentType *possiblePoolBuffer, size_t offset, size_t size, std::vector<BuffersPoolType> &bufferPoolsVec);
void drain();
void drain(std::vector<BuffersPoolType> &bufferPoolsVec);
void addNewBufferPool(BuffersPoolType &&bufferPool);
void addNewBufferPool(BuffersPoolType &&bufferPool, std::vector<BuffersPoolType> &bufferPoolsVec);
std::mutex mutex;
std::vector<BuffersPoolType> bufferPools;
};
} // namespace NEO
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