[None][fix] Allow multi-threaded copy for GDRCopy wrapper #8535
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📝 WalkthroughWalkthroughRemoved concurrent locking mechanism (GDRLOCKCALL wrapper) from two mapping copy operations in gdrwrap.cpp, changing Changes
Estimated code review effort🎯 2 (Simple) | ⏱️ ~10 minutes Pre-merge checks and finishing touches❌ Failed checks (2 warnings)
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cpp/tensorrt_llm/runtime/moeLoadBalancer/gdrwrap.cpp (1)
138-145: Document the synchronization strategy and thread-safety assumptions.The codebase now has inconsistent use of the
GDRLOCKCALLwrapper:
- Still locked:
pin_buffer,unpin_buffer,get_info,map,unmap- No longer locked:
copy_to_mapping,copy_from_mapping- Never locked:
open,close,runtime_get_version,driver_get_versionConsider adding comments (at the file or macro level) that explain:
- Which GDRCopy library functions are thread-safe and which require external synchronization
- Why copy operations can safely execute without the lock
- The rationale for the overall locking strategy
This documentation will help future maintainers understand the concurrency design.
Also applies to: 162-163, 168-169, 174-175, 180-181, 186-187, 204-204, 210-210
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🔇 Additional comments (1)
cpp/tensorrt_llm/runtime/moeLoadBalancer/gdrwrap.cpp (1)
207-211: ****The review comment is incorrect. The removal of the lock wrapper from
copy_from_mappingwas an intentional design decision, as evidenced by the commit message "Allow multi-threaded copy for GDRCopy wrapper." The code explicitly documents in the header file (gdrwrap.h) that these functions are thread-safe. Unlike other GDRCopy operations that remain under lock protection, the copy operations intentionally permit concurrent access to enable multi-threaded usage—this is a feature, not a defect.Likely an incorrect or invalid review comment.
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Signed-off-by: Dongxu Yang <78518666+dongxuy04@users.noreply.github.com>
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Signed-off-by: Dongxu Yang <78518666+dongxuy04@users.noreply.github.com> Signed-off-by: yufeiwu-nv <230315618+yufeiwu-nv@users.noreply.github.com>
Signed-off-by: Dongxu Yang <78518666+dongxuy04@users.noreply.github.com> (cherry picked from commit a7c2c8c)
Signed-off-by: Dongxu Yang <78518666+dongxuy04@users.noreply.github.com>
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