cudaGetLastError Pitfall: Clearing the Error Flag Doesn't Fix the Bug
cfregly · x · 2026-11-11
The series covers a classic CUDA error-handling pitfall: Jensen calls cudaGetLastError() to read and clear the error recorded on that host thread; Lori then checks the same thread and sees a cleared flag, while Alice reruns the kernel and finds the issue still there — reading an error is not fixing it.
Related event: Illustrated Guide to LLM Inference Phases and CUDA Error Pitfalls(2 posts)→
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