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Bug 172256

Summary:	AWT thread blocked for few minutes while searching GC root in heapdump
Product:	profiler	Reporter:	Jindrich Sedek <jsedek>
Component:	Base	Assignee:	Jiri Sedlacek <jis>
Status:	VERIFIED FIXED
Severity:	blocker	Keywords:	VISUALVM
Priority:	P2
Version:	6.x
Hardware:	All
OS:	All
URL:	http://beetle.czech.sun.com/data/transfer/jsedek/heapdump.hprof.zip
Issue Type:	DEFECT	Exception Reporter:
Attachments:	full threaddump of profiler walking probably through a long linked list

Description Jindrich Sedek 2009-09-15 08:48:20 UTC

Download and Open heapdump (URL is at URL bug field)
Select to show instances of StackTraceElement
choose some of instances ( somewhere in the middle of the instances list )
invoke fing nearest GC root
progress dialog appears, search takes about 10s

dialog disappears and AWT gets blocked beacuse of profile heapwalk:

"AWT-EventQueue-1" prio=10 tid=0x00000000415af800 nid=0x7d16 runnable [0x00007f9ebe9a5000]
   java.lang.Thread.State: RUNNABLE
	at org.netbeans.modules.profiler.heapwalk.model.BrowserUtils.getFullNodeName(BrowserUtils.java:103)
	at org.netbeans.modules.profiler.heapwalk.model.BrowserUtils.getFullNodeName(BrowserUtils.java:103)
	at org.netbeans.modules.profiler.heapwalk.model.BrowserUtils.getFullNodeName(BrowserUtils.java:103)
	at org.netbeans.modules.profiler.heapwalk.model.BrowserUtils.getFullNodeName(BrowserUtils.java:103)
	at org.netbeans.modules.profiler.heapwalk.model.BrowserUtils.getFullNodeName(BrowserUtils.java:103)
	at org.netbeans.modules.profiler.heapwalk.model.BrowserUtils.getFullNodeName(BrowserUtils.java:103)
	at org.netbeans.modules.profiler.heapwalk.model.BrowserUtils.getFullNodeName(BrowserUtils.java:103)
	at org.netbeans.modules.profiler.heapwalk.model.BrowserUtils.getFullNodeName(BrowserUtils.java:103)

Comment 1 Jindrich Sedek 2009-09-15 08:49:49 UTC

Created attachment 87663 [details]
full threaddump of profiler walking probably through a long linked list

Comment 2 Jiri Sedlacek 2009-09-22 10:22:28 UTC

Fixed in profiler-main:

 - optimized BrowserUtils.getFullNodeName: http://hg.netbeans.org/profiler-main/rev/ecda83c2704b
 - improved TreeTable performance: http://hg.netbeans.org/profiler-main/rev/f0b5ca6c2608
 - collapsing of LinkedList$Entry chain into a single node: http://hg.netbeans.org/profiler-main/rev/30d46f744589

Comment 3 Quality Engineering 2009-09-24 12:34:11 UTC

Integrated into 'main-golden', will be available in build *200909230201* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
Changeset: http://hg.netbeans.org/main-golden/rev/f0b5ca6c2608
User: Jiri Sedlacek <jis@netbeans.org>
Log: Partial Bugfix #172256 - improved JTreeTable performance

Comment 4 Jindrich Sedek 2009-12-04 03:53:28 UTC

great progress :)
verified.
NetBeans IDE 6.8 RC2 (Build 200912022200)