On Wed, Jun 14, 2023 at 10:58:20PM +0800, Chen Yu wrote: > On 2023-06-14 at 10:17:57 +0200, Peter Zijlstra wrote: > > On Tue, Jun 13, 2023 at 04:00:39PM +0530, K Prateek Nayak wrote: > > > > > >> - SIS_NODE_TOPOEXT - tip:sched/core + this patch > > > >> + new sched domain (Multi-Multi-Core or MMC) > > > >> (https://lore.kernel.org/all/20230601153522.GB559993@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/) > > > >> MMC domain groups 2 nearby CCX. > > > > > > > > OK, so you managed to get the NPS4 topology in NPS1 mode? > > > > > > Yup! But it is a hack. I'll leave the patch at the end. > > > > Chen Yu, could we do the reverse? Instead of building a bigger LLC > > domain, can we split our LLC based on SNC (sub-numa-cluster) topologies? > > > Hi Peter, > Do you mean with SNC enabled, if the LLC domain gets smaller? > According to the test, the answer seems to be yes. No, I mean to build smaller LLC domains even with SNC disabled, as-if SNC were active.
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