I have a C++ program with several threads that use CUDA. On one thread I am doing custom point cloud stitching. After a single cycle of stitch, if a correspondence vector has the x component as NaN then it is an invalid correspondence, which is ok. I then do a cudaStreamSynchronize(nullptr) and d…

So the slides at S4158-cuda-streams-best-practices-common-pitfalls.pdf 1911.04 KB Explain concurrency and also indicate the problem here. Error between keyboard and chair.

More Info: Interesting, I changed the code to ensure the the same C++ thread (on Windows10, Visual C++) that uses the memory in CUDA also allocates the memory and the bug goes away. CORRECTION: Does not go away. Is this a bug in CUDA? Is it supposed to work this way? Can the same CUDA block of memo…

cudaStreamSynchronize vs cudaDeviceSynchronize across threads

Accelerated Computing CUDA CUDA Programming and Performance

rmkeene November 18, 2021, 2:03am 3

So the slides at

Explain concurrency and also indicate the problem here. Error between keyboard and chair.

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cudaStreamSynchronize vs cudaDeviceSynchronize across threads

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