In this slidecast, Jeff Squyres from Cisco presents: Ethernet Secrets of TCP.
TCP? Who cares about TCP in HPC? More and more people, actually. With the commoditization of HPC, lots of newbie HPC users are intimidated by special, one-off, traditional HPC types of networks and opt for the simplicity and universality of Ethernet. And it turns out that TCP doesn’t suck nearly as much as most (HPC) people think, particularly on modern servers, Ethernet fabrics, and powerful Ethernet NICs. I’ll cut to the chase: I surprised myself by being able to get ~10us half-round-trip ping-pong MPI latency over TCP (using NetPIPE).”