[None][fix] Add Lock to protect mReqeustToSession #8085
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Signed-off-by: Chuang Zhu <111838961+chuangz0@users.noreply.github.com>
📝 WalkthroughWalkthroughChanged Impl::getCounterpartsCount from const to non-const and added mutex locking around access to mRequestToSession to ensure thread-safe retrieval of counterpart counts. Changes
Estimated code review effort🎯 2 (Simple) | ⏱️ ~10 minutes Pre-merge checks and finishing touches❌ Failed checks (2 warnings)
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🧹 Nitpick comments (1)
cpp/tensorrt_llm/batch_manager/dataTransceiver.cpp (1)
296-296: Consider using consistent variable naming.Other methods in this class use
lkfor the lock variable name (lines 304, 355, 374), while this method useslock. Consider renaming for consistency.- std::unique_lock<std::mutex> lock(mMtxForMap); + std::unique_lock<std::mutex> lk(mMtxForMap);
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cpp/tensorrt_llm/batch_manager/dataTransceiver.cpp(1 hunks)
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🧠 Learnings (1)
📚 Learning: 2025-08-06T08:18:28.669Z
Learnt from: zhengd-nv
PR: NVIDIA/TensorRT-LLM#6633
File: cpp/tensorrt_llm/batch_manager/dataTransceiverImpl.cpp:145-155
Timestamp: 2025-08-06T08:18:28.669Z
Learning: In cpp/tensorrt_llm/batch_manager/dataTransceiverImpl.cpp, the existing `mMtxForMap` mutex in DataSenderImpl is sufficient to synchronize measurement file operations in the `release` method, as all file operations occur within the same critical section that protects the `mRequestToSession` map access.
Applied to files:
cpp/tensorrt_llm/batch_manager/dataTransceiver.cpp
🧬 Code graph analysis (1)
cpp/tensorrt_llm/batch_manager/dataTransceiver.cpp (2)
cpp/tensorrt_llm/batch_manager/dataTransceiver.h (2)
nodiscard(88-113)nodiscard(171-289)cpp/include/tensorrt_llm/batch_manager/llmRequest.h (8)
nodiscard(554-557)nodiscard(562-565)nodiscard(585-588)nodiscard(772-780)nodiscard(783-786)nodiscard(789-792)nodiscard(1028-1031)nodiscard(1193-1201)
🔇 Additional comments (1)
cpp/tensorrt_llm/batch_manager/dataTransceiver.cpp (1)
294-300: LGTM! Thread-safety improvement.The addition of
mMtxForMaplock correctly protects concurrent access tomRequestToSession. The signature change fromconstto non-const is appropriate since acquiring a lock modifies the mutex state. This follows the same synchronization pattern used inrelease,recvRequestInfo, andsendSyncmethods.Based on learnings
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