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 <[email protected]>
> Signed-off-by: Tony Luck <[email protected]>
> ---
(note ordering of commit tags)
Reviewed-by: Reinette Chatre <[email protected]>
Reinette