With Sub-NUMA Cluster mode enabled the scope of monitoring resources is per-NODE instead of per-L3 cache. Suffices of directories with "L3" in their name refer to Sun-NUMA nodes instead of L3 cache ids. Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx> --- Documentation/x86/resctrl.rst | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/Documentation/x86/resctrl.rst b/Documentation/x86/resctrl.rst index 71a531061e4e..9043a2d2f2d3 100644 --- a/Documentation/x86/resctrl.rst +++ b/Documentation/x86/resctrl.rst @@ -167,6 +167,11 @@ with the following files: bytes) at which a previously used LLC_occupancy counter can be considered for re-use. +"snc_ways": + A value of "1" marks that SNC mode is disabled. + Values of "2" or "4" indicate how many NUMA + nodes share an L3 cache. + Finally, in the top level of the "info" directory there is a file named "last_cmd_status". This is reset with every "command" issued via the file system (making new directories or writing to any of the @@ -254,9 +259,13 @@ When control is enabled all CTRL_MON groups will also contain: When monitoring is enabled all MON groups will also contain: "mon_data": - This contains a set of files organized by L3 domain and by - RDT event. E.g. on a system with two L3 domains there will - be subdirectories "mon_L3_00" and "mon_L3_01". Each of these + This contains a set of files organized by L3 domain or by NUMA + node (depending on whether SNC mode is disabled or enabled + respectively) and by RDT event. E.g. on a system with SNC + mode disabled with two L3 domains there will be subdirectories + "mon_L3_00" and "mon_L3_01" the numerical suffix refers to the + L3 cache id. With SNC enabled the directory names are the same, + but the numerical suffix refers to the node id. Each of these directories have one file per event (e.g. "llc_occupancy", "mbm_total_bytes", and "mbm_local_bytes"). In a MON group these files provide a read out of the current value of the event for -- 2.39.1
