Forgot to add the config info about the tests in previous post. We have FDR IB, two nodes (HP DL 380 G8 sever) communicating through a Mellanox Switch, RDMA mode, hyperthreading enabled.
Thanks, Na Zhang On Tue, Jul 15, 2014 at 12:00 PM, Na Zhang <nkuzhan...@gmail.com> wrote: > Dear developers and users, > > I am trying to run OSU benchmark tests (like osu_latency, osu_bw, etc) > with Open MPI. While I was able to run the tests with both versions > (1.6.5, 1.8.1, same default build), I got disparate performance results. > Please see data below. I wonder what reason would cause the performance > difference. > > And also, I was trying to run the tests with latest release 1.8.2, got the > warning like below, and got the results similar to version 1.8.1. How can I > avoid this warning? > -------------------------------------------------------------------------- > WARNING: a request was made to bind a process. While the system > supports binding the process itself, at least one node does NOT > support binding memory to the process location. > > Node: hostname > > This is a warning only; your job will continue, though performance may > be degraded. > -------------------------------------------------------------------------- > > Thanks, > Na Zhang > > *Version 1.6.5* > # OSU MPI Latency Test v4.3 > # Size Latency (us) > 0 1.83 > 1 1.11 > 2 1.11 > 4 1.11 > 8 1.13 > 16 1.15 > 32 1.17 > 64 1.22 > 128 1.54 > 256 1.73 > 512 1.90 > 1024 2.24 > 2048 2.93 > 4096 3.59 > 8192 4.96 > 16384 7.81 > 32768 11.22 > 65536 18.18 > 131072 32.10 > 262144 59.91 > 524288 115.56 > 1048576 226.84 > 2097152 449.71 > 4194304 894.75 > > *Version 1.8.1* > # OSU MPI Latency Test v4.3 > # Size Latency (us) > 0 0.22 > 1 0.27 > 2 0.27 > 4 0.27 > 8 0.27 > 16 0.28 > 32 0.28 > 64 0.31 > 128 0.44 > 256 0.47 > 512 0.48 > 1024 0.60 > 2048 0.83 > 4096 1.30 > 8192 1.95 > 16384 3.45 > 32768 5.79 > 65536 8.88 > 131072 15.79 > 262144 28.78 > 524288 53.50 > 1048576 104.09 > 2097152 202.54 > 4194304 398.43 >
