Are there any Ammasso based clusters out there that someone has some experience with tuning the Ammasso communication parameters for the RDMA interfaces? We have a small cluster with Ammasso interconnects running NAMD 2.6b1. The defaults for Ammasso communication are what we use for each NAMD job. I'd like to know if changing those such as:
VIADEV_NUM_RDMA_BUFFERS VIADEV_MAX_RENDEZVOUS would be worth trying. I'm hoping someone might have already done some tuning and has some advice. The typical job now is using 16 CPUs thru 8 interconnects. Ramping up the number nodes tends to improve performance up to 20 CPUs but flattens after that til we get to 32 CPUs. Each node is a dual Opteron with a single Ammasso card. The rack has a non-blocking gig-e SMC 8624 switch. Thanks, Dow __________________________________ Dow P. Hurst, Research Scientist Department of Chemistry and Biochemistry University of North Carolina at Greensboro 435 New Science Bldg.Greensboro, NC 27402-6170 _______________________________________________ Beowulf mailing list, [email protected] To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
