Re: RE: [PATCH 1/2] x86/resctrl, Documentation: Keep mbm_assign_mode "default" on boot

From: Babu Moger

Date: Thu Jul 30 2026 - 17:06:35 EST


Hi Tony,

On 7/30/26 15:40, Luck, Tony wrote:
In either case, creating more monitoring groups than available counters can
lead to innacuracies during measurement.

Is that magic "64" enumerated anywhere? Or are users expected to just know it somehow (or find out
the hard way when they get odd results when using more than 64 RMIDs).

This number is not visible to the user. That has been a problem with this mode.

Thanks
Babu