[mvapich-discuss] Questions in OSU OpenSHMEM Microbenchmarks

Hashmi, Jahanzeb hashmi.29 at buckeyemail.osu.edu
Tue Dec 19 15:36:03 EST 2017


Hi Naveen,

The OpenSHMEM (1.3) specification document (page 58) states that:
"The pWrk argument must have the same data type as dest. In C/C++, this contains
max(nreduce/2 + 1, SHMEM_REDUCE_MIN_WRKDATA_SIZE) elements."

http://www.openshmem.org/site/sites/default/site_files/OpenSHMEM-1.3.pdf

The osu_oshm_reduce benchmark in OMB is following the OpenSHMEM standard. Further, the collective benchmarks in OpenSHMEM report number of elements instead of bytes as max_msg_size is 4M that corresponds to 1M float elements.

Please let us know if there is any other issue.

Thanks

Jahanzeb
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