[mpich-discuss] osu_latency test: why 8KB takes less time than 4KB and 2KB takes less time than 1KB?

Abu Naser an16e at my.fsu.edu
Wed Jun 20 08:53:49 CDT 2018


Good day to all,


I had run point to point osu_latency test in two nodes for 200 times.  Followings are the average time in microsecond for various size of the messages -

1KB    84.8514 us
2KB    73.52535 us
4KB    272.55275 us
8KB    234.86385 us
16KB    288.88 us
32KB    523.3725 us
64KB    910.4025 us



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