Messages in this thread | | | Date | Mon, 11 Sep 2023 13:23:35 -0700 | Subject | Re: [PATCH v5 0/8] Add support for Sub-NUMA cluster (SNC) systems | From | Reinette Chatre <> |
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Hi Tony,
On 8/29/2023 4:44 PM, Tony Luck wrote: > 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.
Same typo as in V4.
> > 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.
I have the same question as with V4 that was not answered in that email thread nor in this new version. https://lore.kernel.org/lkml/e350514e-76ed-14ea-3e74-c0852658182f@intel.com/
I stop my review of this series here.
Reinette
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