9 ms·
HPL is not especially sensitive to network latency. There are many data centers that could run HPL and get on the list, but don't care to pull that (relatively
by jedbrown 8y ago
HPL is not especially sensitive to network latency. There are many data centers that could run HPL and get on the list, but don't care to pull that (relatively expensive) stunt. Among scientific applications, a significant fraction really depend on the high-end networks while others would be fine without.
- bbgm 8y agoIn the past EC2-based clusters have made the Top500. Somewhat unique then because they were the only virtualized systems, but those were just 10 gig ethernet and HPL runs really well on those. In all cases we did it on relatively small number of machines before they had been publicly launched (essentially we used HPL as a stress test). (Work at AWS)
- greglindahl 8y agoLook at the % of peak for ethernet systems vs various Infiniband speeds, or Intel Omni-Path, and you'll see that there's a significant different in the % of peak for Ethernet vs Infiniband vs Omni-Path.