File 0026-tools-kvm_stat-fix-child-trace-events-acco... of Package kvm_stat

Overview Repositories Revisions Requests Users Attributes Meta

File 0026-tools-kvm_stat-fix-child-trace-events-accounting.patch of Package kvm_stat (Revision fdf839a27d55e1fe60e71043ca9060f3)

Currently displaying revision fdf839a27d55e1fe60e71043ca9060f3 , Show latest

From 3c5eabd99472e3c753e7660e9bde38be61c376bc Mon Sep 17 00:00:00 2001
From: Stefan Raspl <stefan.raspl@de.ibm.com>
Date: Mon, 11 Dec 2017 12:25:23 +0100
Subject: [PATCH 26/43] tools/kvm_stat: fix child trace events accounting

Child trace events were included in calculation of the overall total,
which is used for calculation of the percentages of the '%Total' column.
However, the parent trace envents' stats summarize the child trace
events, hence we'd incorrectly account for them twice, leading to
slightly wrong stats.
With this fix, we use the correct total. Consequently, the sum of the
child trace events' '%Total' column values is identical to the
respective value of the respective parent event. However, this also
means that the sum of the '%Total' column values will aggregate to more
than 100 percent.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit fff8c9eb48aa58259071b5df0e6d4c1c0bc1ba51)
[FL: FATE#325017]
Signed-off-by: Fei Li <fli@suse.com>
---
 tools/kvm/kvm_stat/kvm_stat     | 6 +++---
 tools/kvm/kvm_stat/kvm_stat.txt | 2 ++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/kvm/kvm_stat/kvm_stat b/tools/kvm/kvm_stat/kvm_stat
index 639f9a40a9e4..f2711b0a04f5 100755
--- a/tools/kvm/kvm_stat/kvm_stat
+++ b/tools/kvm/kvm_stat/kvm_stat
@@ -1095,14 +1095,14 @@ class Tui(object):
             # sort by totals
             return (0, -stats[x][0])
         total = 0.
-        for val in stats.values():
-            total += val[0]
+        for key in stats.keys():
+            if key.find('(') is -1:
+                total += stats[key][0]
         if self._sorting == SORT_DEFAULT:
             sortkey = sortCurAvg
         else:
             sortkey = sortTotal
         for key in sorted(stats.keys(), key=sortkey):
-
             if row >= self.screen.getmaxyx()[0]:
                 break
             values = stats[key]
diff --git a/tools/kvm/kvm_stat/kvm_stat.txt b/tools/kvm/kvm_stat/kvm_stat.txt
index e9e8e6b8a1be..b5b3810c9e94 100644
--- a/tools/kvm/kvm_stat/kvm_stat.txt
+++ b/tools/kvm/kvm_stat/kvm_stat.txt
@@ -50,6 +50,8 @@ INTERACTIVE COMMANDS
 *s*::   set update interval
 
 *x*::	toggle reporting of stats for child trace events
+ ::     *Note*: The stats for the parents summarize the respective child trace
+                events
 
 Press any other key to refresh statistics immediately.
 
-- 
2.12.3

Places

File 0026-tools-kvm_stat-fix-child-trace-events-accounting.patch of Package kvm_stat (Revision fdf839a27d55e1fe60e71043ca9060f3)

Places