From 4b74b9fdcc6b394f69acd6248202b7887711af2a Mon Sep 17 00:00:00 2001
From: Nils Loodin <nloodin@openjdk.org>
Date: Mon, 3 Jun 2013 16:13:44 +0200
Subject: [PATCH] 6526682: JConsole shows negative CPU Usage

Reviewed-by: alanb, mchung
---
 jdk/src/share/classes/sun/tools/jconsole/SummaryTab.java | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/jdk/src/share/classes/sun/tools/jconsole/SummaryTab.java b/jdk/src/share/classes/sun/tools/jconsole/SummaryTab.java
index 13ee1dd7262..2c199b5f042 100644
--- a/jdk/src/share/classes/sun/tools/jconsole/SummaryTab.java
+++ b/jdk/src/share/classes/sun/tools/jconsole/SummaryTab.java
@@ -360,6 +360,8 @@ class SummaryTab extends Tab {
                     Math.min(99F,
                              elapsedCpu / (elapsedTime * 10000F * result.nCPUs));
 
+                cpuUsage = Math.max(0F, cpuUsage);
+
                 getPlotter().addValues(result.timeStamp,
                                 Math.round(cpuUsage * Math.pow(10.0, CPU_DECIMALS)));
                 getInfoLabel().setText(Resources.format(Messages.CPU_USAGE_FORMAT,