[PATCH v3 26/26] x86/resctrl: Update Documentation for package events

[Tony Luck]

Each "mon_data" directory is now divided between L3 events and package
events.

The "info/PERF_PKG_MON" directory contains parameters for perf events.

Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
---
 Documentation/filesystems/resctrl.rst | 38 ++++++++++++++++++++-------
 1 file changed, 28 insertions(+), 10 deletions(-)

diff --git a/Documentation/filesystems/resctrl.rst b/Documentation/filesystems/resctrl.rst
index 6768fc1fad16..b89a188b0321 100644
--- a/Documentation/filesystems/resctrl.rst
+++ b/Documentation/filesystems/resctrl.rst
@@ -167,7 +167,7 @@ with respect to allocation:
 			bandwidth percentages are directly applied to
 			the threads running on the core
 
-If RDT monitoring is available there will be an "L3_MON" directory
+If RDT L3 monitoring is available there will be an "L3_MON" directory
 with the following files:
 
 "num_rmids":
@@ -261,6 +261,17 @@ with the following files:
 		bytes) at which a previously used LLC_occupancy
 		counter can be considered for re-use.
 
+If RDT PERF monitoring is available there will be an "L3_PERF_PKG" directory
+with the following files:
+
+"num_rmids":
+		The guaranteed number of hardware countes supporting RMIDs.
+		If more "CTRL_MON" + "MON" groups than this number are created,
+		the system may report that counters are "unavailable" when read.
+
+"mon_features":
+		Lists the perf monitoring events that are enabled on this system.
+
 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
@@ -366,15 +377,22 @@ 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
-	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
-	all tasks in the group. In CTRL_MON groups these files provide
-	the sum for all tasks in the CTRL_MON group and all tasks in
-	MON groups. Please see example section for more details on usage.
+	This contains a set of directories, one for each instance
+	of an L3 cache, or of a processor package. The L3 cache
+	directories are named "mon_L3_00", "mon_L3_01" etc. The
+	package directories "mon_PERF_PKG_00", "mon_PERF_PKG_01" etc.
+
+	Within each directory there is one file per event. In
+	the L3 directories: "llc_occupancy", "mbm_total_bytes",
+	and "mbm_local_bytes".	In the PERF_PKG directories: "core_energy",
+	"activity", etc.
+
+	In a MON group these files provide a read out of the current
+	value of the event for all tasks in the group. In CTRL_MON groups
+	these files provide the sum for all tasks in the CTRL_MON group
+	and all tasks in MON groups. Please see example section for more
+	details on usage.
+
 	On systems with Sub-NUMA Cluster (SNC) enabled there are extra
 	directories for each node (located within the "mon_L3_XX" directory
 	for the L3 cache they occupy). These are named "mon_sub_L3_YY"
-- 
2.48.1