> The Sub-NUMA cluster feature on some Intel processors partitions > the CPUs that share an L3 cache into two or more sets. This plays > havoc with the Resource Director Technology (RDT) monitoring features. > Prior to this patch Intel has advised that SNC and RDT are incompatible. > > Some of these CPU support an MSR that can partition the RMID > counters in the same way. This allows for monitoring features > to be used (with the caveat that memory accesses between different > SNC NUMA nodes may still not be counted accuratlely. > > Note that this patch series improves resctrl reporting considerably > on systems with SNC enabled, but there will still be some anomalies > for processes accessing memory from other sub-NUMA nodes. Bother .. forgot to add the changes since last version summary to the cover letter. I fixed all the issues called out by Peter Newman in his review of v6 series. Specific details are included in each patch (except for patch 0005 which is unchanged). I added Peter's "Reviewed-by" to patches where he offered it AND where I didn't make substantive changes (parts 4, 5, 6, 7) -Tony
