Hi Babu, On 8/14/25 7:25 PM, Babu Moger wrote: > The BMEC (Bandwidth Monitoring Event Configuration) feature enables > per-domain event configuration. With BMEC the MBM events are configured > using the mbm_total_bytes_config or mbm_local_bytes_config files in > /sys/fs/resctrl/info/L3_MON/ and the per-domain event configuration affects > all monitor resource groups. > > The mbm_event counter assignment mode enables counters to be assigned to > RMID (i.e a monitor resource group), event pairs, with potentially unique > event configurations associated with every counter. > > There may be systems that support both BMEC and mbm_event counter > assignment mode, but resctrl supporting both concurrently will present a > conflicting interface to the user with both per-domain and per RMID, event > configurations active at the same time. > > The mbm_event counter assignment provides most flexibility to user space > and aligns with Arm's counter support. On systems that support both, > disable BMEC event configuration when mbm_event mode is enabled by hiding > the mbm_total_bytes_config or mbm_local_bytes_config files when mbm_event > mode is enabled. Ensure mon_features always displays accurate information > about monitor features. > > Suggested-by: Reinette Chatre <reinette.chatre@xxxxxxxxx> > Signed-off-by: Babu Moger <babu.moger@xxxxxxx> > --- Reviewed-by: Reinette Chatre <reinette.chatre@xxxxxxxxx> Reinette
