Hi Babu, On 8/14/25 7:25 PM, Babu Moger wrote: > Resctrl subsystem can support two monitoring modes, "mbm_event" or > "default". In mbm_event mode, monitoring event can only accumulate data > while it is backed by a hardware counter. In "default" mode, resctrl > assumes there is a hardware counter for each event within every CTRL_MON > and MON group. > > Introduce mbm_assign_mode resctrl file to switch between mbm_event and > default modes. > > Example: > To list the MBM monitor modes supported: > $ cat /sys/fs/resctrl/info/L3_MON/mbm_assign_mode > [mbm_event] > default > > To enable the "mbm_event" counter assignment mode: > $ echo "mbm_event" > /sys/fs/resctrl/info/L3_MON/mbm_assign_mode > > To enable the "default" monitoring mode: > $ echo "default" > /sys/fs/resctrl/info/L3_MON/mbm_assign_mode > > MBM event counters are automatically reset as part of changing the mode. Needs imperative, eg.: "Reset MBM event counters automatically ..." > Clear both architectural and non-architectural event states to prevent > overflow conditions during the next event read. Clear assignable counter > configuration on all the domains. Also, enable auto assignment when > switching to "mbm_event" mode. > > Signed-off-by: Babu Moger <babu.moger@xxxxxxx> > --- | Reviewed-by: Reinette Chatre <reinette.chatre@xxxxxxxxx> Reinette
