As many of you know, the Texas Advanced Computing Center is in the midst of installing “Stampede” — a large supercomputer using both Intel Xeon E5 (“Sandy Bridge”) and Intel Xeon Phi (aka “MIC”, aka “Knights Corner”) processors. In his blog “The Perils of Parallel”, Greg Pfister commented on the… read more
AMD Opteron “Shanghai” and “Istanbul” Local and Remote Memory Latencies
In an earlier post, I documented the local and remote memory latencies for the SunBlade X6420 compute nodes in the TACC Ranger supercomputer, using AMD Opteron “Barcelona” (model 8356) processors running at 2.3 GHz. Similar latency tests were run on other systems based on AMD Opteron processors in the TACC… read more
TACC Ranger Node Local and Remote Memory Latency Tables
In the previous post, I published my best set of numbers for local memory latency on a variety of AMD Opteron system configurations. Here I expand that to include remote memory latency on some of the systems that I have available for testing. Ranger is the oldest system still operational… read more