From c2f061c86142cfb1210c02feadb691131b647372 Mon Sep 17 00:00:00 2001
From: Qiaowei Ren <qiaowei.ren@intel.com>
Date: Tue, 2 Aug 2016 14:43:35 -0400
Subject: [PATCH] util: Add some comment details for virPerfEventType

Add to some details for the existing enum
---
 src/util/virperf.h | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/util/virperf.h b/src/util/virperf.h
index 716341019b..bdafe03bd5 100644
--- a/src/util/virperf.h
+++ b/src/util/virperf.h
@@ -24,10 +24,13 @@
 
 # include "virutil.h"
 
+/* Some Intel processor families introduced some RDT (Resource Director
+ * Technology) features to monitor or control shared resource based on
+ * the perf framework in the linux kernel. */
 typedef enum {
-    VIR_PERF_EVENT_CMT,
-    VIR_PERF_EVENT_MBMT,
-    VIR_PERF_EVENT_MBML,
+    VIR_PERF_EVENT_CMT,    /* Cache Monitoring Technology */
+    VIR_PERF_EVENT_MBMT,   /* Memory Bandwidth Monitoring Total */
+    VIR_PERF_EVENT_MBML,   /* Memory Bandwidth Monitor Limit for controller */
 
     VIR_PERF_EVENT_LAST
 } virPerfEventType;