Re: [PATCH v8 07/25] x86/resctrl: Introduce the interface to display monitor mode

[Tony Luck]

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