Hi Tony, On 11/9/2023 3:09 PM, Tony Luck wrote: > There isn't a simple hardware bit that indicates whether a CPU is > running in Sub NUMA Cluster (SNC) mode. Infer the state by comparing > the ratio of NUMA nodes to L3 cache instances. > > When SNC mode is detected, reconfigure the RMID counters by updating > the MSR_RMID_SNC_CONFIG MSR on each socket as CPUs are seen. > > Clearing bit zero of the MSR divides the RMIDs and renumbers the ones > on the second SNC node to start from zero. > > Reviewed-by: Peter Newman <peternewman@xxxxxxxxxx> > Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx> > --- (note ordering of commit tags) Reviewed-by: Reinette Chatre <reinette.chatre@xxxxxxxxx> Reinette
