[mvapich-discuss] osu_mbw_mr does not recognize option -d

[Subramoni, Hari]

Hello, Marius.

The multi-pair bandwidth/message rate benchmark does not support transfer from/to device buffers. This is a known limitation. We have plans to add this support in the future.

Could you please take a look at the numbers reported with '--accelerator cuda' and compare it with numbers seen for host to host? It's likely that it is just running host to host and not throwing the error message correctly.

Regards,
Hari.

Sent from my phone


On Jun 27, 2018 12:34 PM, Marius Brehler <marius.brehler at tu-dortmund.de> wrote:
Hi,

testing mvapich2-gdr on our machine, I noticed that passing '-d cuda' to
the osu_mbw_mr benchmark (shipped with the RPM) fails:


[brehler at fermi tests]$ mpirun -np 2
/opt/mvapich2/gdr/2.3a/libexec/osu-micro-benchmarks/get_local_rank
/opt/mvapich2/gdr/2.3a/libexec/osu-micro-benchmarks/mpi/pt2pt/osu_mbw_mr
-d cuda
/opt/mvapich2/gdr/2.3a/libexec/osu-micro-benchmarks/mpi/pt2pt/osu_mbw_mr:
invalid option -- 'd'
Invalid Option [-d]

/opt/mvapich2/gdr/2.3a/libexec/osu-micro-benchmarks/mpi/pt2pt/osu_mbw_mr:
invalid option -- 'd'
Usage: (null) [options]


Passing the option '--accelerator cuda' works as expected.
Regards

Marius
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