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| author |   Tony Luck <tony.luck@intel.com> | 2024-12-06 08:31:48 -0800 |
|---|---|---|
| committer |   Borislav Petkov (AMD) <bp@alien8.de> | 2024-12-12 11:27:43 +0100 |
| commit | faf6ef673787956ec4d33ac8bf56f8ea929abf37 (patch) | |
| tree | 90fc358d7d6be79f7cdaf0bbab2f8dd7bfb1d695 | |
| parent | x86/resctrl: Add write option to "mba_MBps_event" file (diff) | |
| download | wireguard-linux-faf6ef673787956ec4d33ac8bf56f8ea929abf37.tar.xz wireguard-linux-faf6ef673787956ec4d33ac8bf56f8ea929abf37.zip | |
x86/resctrl: Document the new "mba_MBps_event" file
Add a section to document a new read/write file that shows/sets the memory
bandwidth event used to control bandwidth used by each CTRL_MON group.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lore.kernel.org/r/20241206163148.83828-9-tony.luck@intel.com
Diffstat (limited to '')
| -rw-r--r-- | Documentation/arch/x86/resctrl.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/arch/x86/resctrl.rst b/Documentation/arch/x86/resctrl.rst index a824affd741d..6768fc1fad16 100644 --- a/Documentation/arch/x86/resctrl.rst +++ b/Documentation/arch/x86/resctrl.rst @@ -384,6 +384,16 @@ When monitoring is enabled all MON groups will also contain: Available only with debug option. The identifier used by hardware for the monitor group. On x86 this is the RMID. +When the "mba_MBps" mount option is used all CTRL_MON groups will also contain: + +"mba_MBps_event": + Reading this file shows which memory bandwidth event is used + as input to the software feedback loop that keeps memory bandwidth + below the value specified in the schemata file. Writing the + name of one of the supported memory bandwidth events found in + /sys/fs/resctrl/info/L3_MON/mon_features changes the input + event. + Resource allocation rules ------------------------- |