Hi Babu,
On 12/22/2022 3:31 PM, Babu Moger wrote:
> The event configuration can be viewed by the user by reading the
> configuration file /sys/fs/resctrl/info/L3_MON/mbm_total_bytes_config.
> The event configuration settings are domain specific and will affect all
> the CPUs in the domain.
>
> Following are the types of events supported:
> ==== ===========================================================
> Bits Description
> ==== ===========================================================
> 6 Dirty Victims from the QOS domain to all types of memory
> 5 Reads to slow memory in the non-local NUMA domain
> 4 Reads to slow memory in the local NUMA domain
> 3 Non-temporal writes to non-local NUMA domain
> 2 Non-temporal writes to local NUMA domain
> 1 Reads to memory in the non-local NUMA domain
> 0 Reads to memory in the local NUMA domain
> ==== ===========================================================
>
> By default, the mbm_total_bytes_config is set to 0x7f to count all the
> event types.
>
> For example:
> $cat /sys/fs/resctrl/info/L3_MON/mbm_total_bytes_config
> 0=0x7f;1=0x7f;2=0x7f;3=0x7f
>
> In this case, the event mbm_total_bytes is configured with 0x7f on
> domains 0 to 3.
>
> Signed-off-by: Babu Moger <babu.moger@xxxxxxx>
...
> --- a/arch/x86/kernel/cpu/resctrl/internal.h
> +++ b/arch/x86/kernel/cpu/resctrl/internal.h
> @@ -30,6 +30,29 @@
> */
> #define MBM_CNTR_WIDTH_OFFSET_MAX (62 - MBM_CNTR_WIDTH_BASE)
>
> +/* Reads to Local DRAM Memory */
> +#define READS_TO_LOCAL_MEM BIT(0)
> +
> +/* Reads to Remote DRAM Memory */
> +#define READS_TO_REMOTE_MEM BIT(1)
> +
> +/* Non-Temporal Writes to Local Memory */
> +#define NON_TEMP_WRITE_TO_LOCAL_MEM BIT(2)
> +
> +/* Non-Temporal Writes to Remote Memory */
> +#define NON_TEMP_WRITE_TO_REMOTE_MEM BIT(3)
> +
> +/* Reads to Local Memory the system identifies as "Slow Memory" */
> +#define READS_TO_LOCAL_S_MEM BIT(4)
> +
> +/* Reads to Remote Memory the system identifies as "Slow Memory" */
> +#define READS_TO_REMOTE_S_MEM BIT(5)
> +
> +/* Dirty Victims to All Types of Memory */
> +#define DIRTY_VICTIMS_TO_ALL_MEM BIT(6)
Some stray white space above.
> +
> +/* Max event bits supported */
> +#define MAX_EVT_CONFIG_BITS GENMASK(6, 0)
>
> struct rdt_fs_context {
> struct kernfs_fs_context kfc;
Please remove stray white space. With that:
Reviewed-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
Reinette
