(These are old notes for relatively old systems — I just found this in my “drafts” folder and decided to switch the status to “public” so I can find it again!) Some notes on how to determine the DRAM and Memory Controller configuration for a system using AMD Opteron/Phenom or… read more
Opteron
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