CUDA Pro Tip: Profiling MPI Applications – NVIDIA Technical Blog News and tutorials for developers, data scientists, and IT admins 2025-03-21T20:30:26Z http://www.open-lab.net/blog/feed/ Jiri Kraus <![CDATA[CUDA Pro Tip: Profiling MPI Applications]]> http://www.open-lab.net/blog/parallelforall/?p=3313 2022-08-21T23:37:06Z 2014-06-19T19:05:55Z When I profile MPI+CUDA applications, sometimes performance issues only occur for certain MPI ranks. To fix these, it's necessary to identify the MPI rank where...]]> When I profile MPI+CUDA applications, sometimes performance issues only occur for certain MPI ranks. To fix these, it's necessary to identify the MPI rank where...GPU Pro Tip

When I profile MPI+CUDA applications, sometimes performance issues only occur for certain MPI ranks. To fix these, it��s necessary to identify the MPI rank where the performance issue occurs. Before CUDA 6.5 it was hard to do this because the CUDA profiler only shows the PID of the processes and leaves the developer to figure out the mapping from PIDs to MPI ranks. Although the mapping can be done��

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