On Wed, Oct 09, 2024 at 12:39:32PM -0500, Babu Moger wrote: > +"mbm_assign_mode": > + Reports the list of monitoring modes supported. The enclosed brackets > + indicate which mode is enabled. > + :: > + > + cat /sys/fs/resctrl/info/L3_MON/mbm_assign_mode > + [mbm_cntr_assign] > + default > + > + "mbm_cntr_assign": > + > + In mbm_cntr_assign mode user-space is able to specify which control > + or monitor groups in resctrl should have a counter assigned using the > + 'mbm_assign_control' file. The number of counters available is described > + in the 'num_mbm_cntrs' file. Changing the mode may cause all counters on > + a resource to reset. > + > + The mode is useful on platforms which support more control and monitor > + groups than hardware counters, meaning 'unassigned' control or monitor > + groups will report 'Unavailable' or count the traffic in an unpredictable > + way. > + > + AMD Platforms with ABMC (Assignable Bandwidth Monitoring Counters) feature > + enable this mode by default so that counters remain assigned even when the > + corresponding RMID is not in use by any processor. > + > + "default": > + > + By default resctrl assumes each control and monitor group has a hardware > + counter. Hardware that does not support 'mbm_cntr_assign' mode will still > + allow more control or monitor groups than 'num_rmids' to be created. In Should that be s/num_rmids/num_mbm_cntrs/ ? -Tony
