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https://github.com/NVIDIA/TensorRT-LLM.git
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64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
/*
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* Copyright (c) 2023-2024, 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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#pragma once
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#include <chrono>
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#include <cstdint>
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#include <optional>
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#include <queue>
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#include <unordered_map>
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#include <vector>
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namespace tensorrt_llm::batch_manager
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{
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/// SequenceSlotManager
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///
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/// Helper class to manage sequence slots
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/// This class is not thread-safe
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class SequenceSlotManager
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{
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public:
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using SlotIdType = int32_t;
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using SequenceIdType = std::uint64_t;
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SequenceSlotManager(SlotIdType maxNumSlots, uint64_t maxSequenceIdleMicroseconds);
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/// Function that returns a slot for the provided sequenceId
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/// For a new sequence id, a new slot will be allocated
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/// In case no slot could be allocated or matched, optional will be empty
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std::optional<SlotIdType> getSequenceSlot(bool const& startFlag, SequenceIdType const& sequenceId);
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/// Function that frees the slot associated with the given sequence id
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void freeSequenceSlot(SequenceIdType sequenceId);
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/// Function that frees slots that have been idle for more than
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/// mMaxSequenceIdleMicroseconds
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void freeIdleSequenceSlots();
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private:
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SlotIdType mMaxNumSlots;
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std::chrono::microseconds mMaxSequenceIdleMicroseconds;
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std::unordered_map<SequenceIdType, SlotIdType> mSequenceIdToSlot;
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std::queue<SlotIdType> mAvailableSlots;
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std::vector<std::chrono::steady_clock::time_point> mLastTimepoint;
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};
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} // namespace tensorrt_llm::batch_manager
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