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Fix performance issues with CUDA-aware MPI #1803

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merged 3 commits into from Dec 11, 2019
Merged

Fix performance issues with CUDA-aware MPI #1803

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1b9214c
Fix issues with CUDA-aware MPI
stanmoore1 Dec 9, 2019
fba97b9
Don't change comm flags when there is only 1 MPI rank
stanmoore1 Dec 10, 2019
e0a771d
Remove outdated package.txt
rbberger Dec 10, 2019
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8 changes: 4 additions & 4 deletions doc/src/package.rst
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Expand Up @@ -547,10 +547,10 @@ the *cuda/aware* keyword is automatically set to *off* by default. When
the *cuda/aware* keyword is set to *off* while any of the *comm*
keywords are set to *device*\ , the value for these *comm* keywords will
be automatically changed to *host*\ . This setting has no effect if not
running on GPUs. CUDA-aware MPI is available for OpenMPI 1.8 (or later
versions), Mvapich2 1.9 (or later) when the "MV2\_USE\_CUDA" environment
variable is set to "1", CrayMPI, and IBM Spectrum MPI when the "-gpu"
flag is used.
running on GPUs or if using only one MPI rank. CUDA-aware MPI is available
for OpenMPI 1.8 (or later versions), Mvapich2 1.9 (or later) when the
"MV2\_USE\_CUDA" environment variable is set to "1", CrayMPI, and IBM
Spectrum MPI when the "-gpu" flag is used.


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