[molpro-user] infiniband latency
Mintz, Benjamin J.
bm0037 at gmail.com
Tue Jan 4 15:09:55 GMT 2011
I recently built a mpp version of molpro 2010.1, and I had a question about the result from mpptune.com. Our cluster is set up with dual quad-core intel nehalem processors, and we have an infiniband interconnect using openmpi, openib, and SGE. I ran the mpptune.com, which put the following lines in lib/tuning.rc
I believe this means that molpro determined that our network has a latency of 35 microseconds and a broadcast speed of 249 MB/sec. My question is wether or not this is a good latency and broadcast speed for an infiniband interconnect running molpro. I thought that the latency of an infiniband interconnect was closer to 1-3 microseconds with a bandwidth in the GB/sec. I was just wondering if there is a problem with our network settings, or if there might be an issue with the molpro build, or if this is just as good as it gets. I attached my CONFIG file for reference. I would appreciate any information.
Benjamin J. Mintz
Research Associate, Postdoctoral
Oak Ridge Leadership Computing Facility (OLCF)
Oak Ridge National Laboratory
Phone: (865) 574-6639
Email: mintzbj at ornl.gov
Gmail: bm0037 at gmail.com
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