On Fri, 16 Nov 2012, Ingo Molnar wrote: > > The interleaving of memory areas that have an equal amount of > > shared accesses from multiple nodes is essential to limit the > > traffic on the interconnect and get top performance. > > That is true only if the load is symmetric. Which is usually true of an HPC workload. > > I guess through that in a non HPC environment where you are > > not interested in one specific load running at top speed > > varying contention on the interconnect and memory busses are > > acceptable. But this means that HPC loads cannot be auto > > tuned. > > I'm not against improving these workloads (at all) - I just > pointed out that interleaving isn't necessarily the best > placement strategy for 'large' workloads. Depends on what you mean by "large" workloads. If it is a typically large HPC workload with data structures distributed over nodes then the placement of those data structure spread over all nodes is the best placement startegy. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>