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aaacc9bd68
* Update TensorRT-LLM --------- Co-authored-by: Starrick Liu <73152103+StarrickLiu@users.noreply.github.com>
63 lines
2.4 KiB
C++
63 lines
2.4 KiB
C++
/*
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* Copyright (c) 2022-2024, NVIDIA CORPORATION. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "tensorrt_llm/batch_manager/kvCacheManager.h"
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#include "tensorrt_llm/runtime/bufferManager.h"
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#include "tensorrt_llm/runtime/cudaEvent.h"
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namespace tr = tensorrt_llm::runtime;
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#pragma once
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namespace tensorrt_llm::batch_manager::kv_cache_manager
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{
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// The TransferManager accelerates transfers to/from the GPU by overlapping HtoD and DtoH transfers, and tracks ongoing
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// transfers in order to avoid race conditions. It is functionally equivalent to the prior approach of putting all
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// transfers into the forward pass stream. This is only ever used as a component of a KVCacheManager.
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class KVCacheTransferManager
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{
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public:
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explicit KVCacheTransferManager(tr::BufferManager const& bufferManager);
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//! \brief Onboard a block to gpu memory.
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void onboard(BlockPtr const& offloadBlock, BlockPtr const& block, std::vector<KVCacheBlockPool> const& pools);
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//! \brief Offload a block to cpu memory.
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void offload(BlockPtr const& block, BlockPtr const& offloadBlock, std::vector<KVCacheBlockPool> const& pools);
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//! \brief Synchronize the offload/onboard streams with the bufferManager stream.
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void syncTransfers();
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private:
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//! \brief Get pointer to pool specified by cache block.
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static tr::ITensor::SharedPtr computeBlockPointer(
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BlockPtr const& block, std::vector<KVCacheBlockPool> const& pools, size_t poolIdx);
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//! \brief Copy content of src block to dst.
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void copyBlock(
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BlockPtr const& src, BlockPtr const& dst, std::vector<KVCacheBlockPool> const& pools, bool isOffload);
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runtime::BufferManager mBufferManager;
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runtime::BufferManager mOnboardManager;
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runtime::BufferManager mOffloadManager;
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// Track the block ids offloaded in this iteration.
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std::unordered_map<int32_t, tr::CudaEvent> mPendingOffloads;
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};
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} // namespace tensorrt_llm::batch_manager::kv_cache_manager
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