diff options
| author | Babu Moger <babu.moger@amd.com> | 2025-09-05 16:34:25 -0500 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2025-09-15 12:42:02 +0200 |
| commit | ac1df9bb0ba3ae94137fb494cd9efc598f65d826 (patch) | |
| tree | 2e87d8ada4b96cac0abb9b4d0c91c7363000e4b0 /Documentation/filesystems | |
| parent | f9ae5913d47cda67481a4f54cc3273d3d1d00a01 (diff) | |
fs/resctrl: Introduce mbm_assign_on_mkdir to enable assignments on mkdir
The "mbm_event" counter assignment mode allows users to assign a hardware
counter to an RMID, event pair and monitor the bandwidth as long as it is
assigned.
Introduce a user-configurable option that determines if a counter will
automatically be assigned to an RMID, event pair when its associated
monitor group is created via mkdir. Accessible when "mbm_event" counter
assignment mode is enabled.
Suggested-by: Peter Newman <peternewman@google.com>
Signed-off-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/cover.1757108044.git.babu.moger@amd.com
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/resctrl.rst | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/filesystems/resctrl.rst b/Documentation/filesystems/resctrl.rst index 2e840ef26f68..1de815b3a07b 100644 --- a/Documentation/filesystems/resctrl.rst +++ b/Documentation/filesystems/resctrl.rst @@ -355,6 +355,26 @@ with the following files: # cat /sys/fs/resctrl/info/L3_MON/event_configs/mbm_total_bytes/event_filter local_reads,local_non_temporal_writes +"mbm_assign_on_mkdir": + Exists when "mbm_event" counter assignment mode is supported. Accessible + only when "mbm_event" counter assignment mode is enabled. + + Determines if a counter will automatically be assigned to an RMID, MBM event + pair when its associated monitor group is created via mkdir. Enabled by default + on boot, also when switched from "default" mode to "mbm_event" counter assignment + mode. Users can disable this capability by writing to the interface. + + "0": + Auto assignment is disabled. + "1": + Auto assignment is enabled. + + Example:: + + # echo 0 > /sys/fs/resctrl/info/L3_MON/mbm_assign_on_mkdir + # cat /sys/fs/resctrl/info/L3_MON/mbm_assign_on_mkdir + 0 + "max_threshold_occupancy": Read/write file provides the largest value (in bytes) at which a previously used LLC_occupancy |