Re: [equinox-dev] performance problems with Eclipse startup due to long

[Simon Kaegi <Simon_Kaegi@xxxxxxxxxx>]

Looking at the stack this might be https://bugs.eclipse.org/bugs/show_bug.cgi?id=244628
Each delete of an artifactdescriptor currently causes us to rewrite the repo

Pascal Rapicault---01/08/2009 10:52:10 PM---Some bug fixes got made in 3.4.2, but the main problem is that p2 has to generate metadata on the fly which is a non trivial op

From:	Pascal Rapicault/Ottawa/IBM@IBMCA
To:	Equinox development mailing list <equinox-dev@xxxxxxxxxxx>
Cc:	equinox-dev@xxxxxxxxxxx, equinox-dev-bounces@xxxxxxxxxxx
Date:	01/08/2009 10:52 PM
Subject:	Re: [equinox-dev] performance problems with Eclipse startup due to long DirectoryWatcher.poll() (25 minutes!)

---

Some bug fixes got made in 3.4.2, but the main problem is that p2 has to generate metadata on the fly which is a non trivial operation IO-wise.
I would recommend you to generate p2 metadata for all of those 3000 bundles and install them properly using the p2 director.
One bug report about performance of the reconciler is https://bugs.eclipse.org/bugs/show_bug.cgi?id=251561

Jacek Pospychała ---01/08/2009 11:19:42 AM---Hi I have an Eclipse 3.4.1 install (of ~3000 plug-ins), that's starting for

From:	Jacek Pospychała <Jacek.Pospychala@xxxxxxxxxxxxxxxx>
To:	equinox-dev@xxxxxxxxxxx
Date:	01/08/2009 11:19 AM
Subject:	[equinox-dev] performance problems with Eclipse startup due to long DirectoryWatcher.poll() (25 minutes!)

---

Hi
I have an Eclipse 3.4.1 install (of ~3000 plug-ins), that's starting for 
about 25minutes. Most of this time is spent in 
org.eclipse.equinox.internal.p2.reconciler.dropins.Activator.start() 
calling (indirectly) DirectoryWatcher.poll().

Looking at several coredumps collected during this startup time it seems 
that all threads wait() or sleep() and only "Start Level Event Dispatcher"
is working. All the time this thread is writing some XML. (See it's 
stacktrace below)

Is this expected behaviour? What XML is actually written?
I also notice that p2 directory has about 600mb.

I was looking for bugs with similar stack traces, but with no luck so 
far - should I open new?
thanks

Jacek


stacktrace:

3XMTHREADINFO      "Start Level Event Dispatcher" TID:0x4274C100, 
j9thread_t:0x0001BA70, state:CW, prio=5
3XMTHREADINFO1            (native thread ID:0x890, native priority:0x5, 
native policy:UNKNOWN)
4XESTACKTRACE          at java/io/OutputStreamWriter.write(Bytecode 
PC:71(Compiled Code))
4XESTACKTRACE          at java/io/PrintWriter.write(Bytecode 
PC:71(Compiled Code))
4XESTACKTRACE          at java/io/PrintWriter.write(Bytecode 
PC:71(Compiled Code))
4XESTACKTRACE          at java/io/PrintWriter.print(Bytecode 
PC:71(Compiled Code))
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/persistence/XMLWriter.print(Bytecode 
PC:71(Compiled Code))
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/persistence/XMLWriter.start(Bytecode 
PC:71(Compiled Code))
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/persistence/XMLWriter.writeProperty(Bytecode 
PC:71(Compiled Code))
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/persistence/XMLWriter.writeProperties(Bytecode 
PC:70(Compiled Code))
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/persistence/XMLWriter.writeProperties(Bytecode 
PC:4(Compiled Code))
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/artifact/repository/simple/SimpleArtifactRepositoryIO$Writer.writeArtifacts(Bytecode 
PC:102(Compiled Code))
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/artifact/repository/simple/SimpleArtifactRepositoryIO$Writer.write(Bytecode 
PC:77(Compiled Code))
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/artifact/repository/simple/SimpleArtifactRepositoryIO.write(Bytecode 
PC:25)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/artifact/repository/simple/SimpleArtifactRepository.save(Bytecode 
PC:214(Compiled Code))
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/artifact/repository/simple/SimpleArtifactRepository.save(Bytecode 
PC:24)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/artifact/repository/simple/SimpleArtifactRepository.removeDescriptor(Bytecode 
PC:9)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/provisional/p2/directorywatcher/RepositoryListener.synchronizeArtifactRepository(Bytecode 
PC:105)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/provisional/p2/directorywatcher/RepositoryListener.stopPoll(Bytecode 
PC:92)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/provisional/p2/directorywatcher/DirectoryWatcher.stopPoll(Bytecode 
PC:34)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/provisional/p2/directorywatcher/DirectoryWatcher.poll(Bytecode 
PC:9)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/extensionlocation/ExtensionLocationArtifactRepository.ensureInitialized(Bytecode 
PC:80)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/extensionlocation/ExtensionLocationArtifactRepository.getProperties(Bytecode 
PC:1)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/artifact/repository/ArtifactRepositoryManager.addRepository(Bytecode 
PC:108)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/artifact/repository/ArtifactRepositoryManager.loadRepository(Bytecode 
PC:106)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/artifact/repository/ArtifactRepositoryManager.loadRepository(Bytecode 
PC:5)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/reconciler/dropins/Activator.loadArtifactRepository(Bytecode 
PC:66)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/reconciler/dropins/PlatformXmlListener.synchronizeConfiguration(Bytecode 
PC:398)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/reconciler/dropins/PlatformXmlListener.stopPoll(Bytecode 
PC:31)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/provisional/p2/directorywatcher/DirectoryWatcher.stopPoll(Bytecode 
PC:34)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/provisional/p2/directorywatcher/DirectoryWatcher.poll(Bytecode 
PC:9)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/reconciler/dropins/Activator.watchConfiguration(Bytecode 
PC:224)
4XESTACKTRACE          at 
org/eclipse/equinox/internal/p2/reconciler/dropins/Activator.start(Bytecode 
PC:127)
4XESTACKTRACE          at 
org/eclipse/osgi/framework/internal/core/BundleContextImpl$2.run(Bytecode 
PC:58)
4XESTACKTRACE          at 
java/security/AccessController.doPrivileged(Bytecode PC:3(Compiled Code))
4XESTACKTRACE          at 
org/eclipse/osgi/framework/internal/core/BundleContextImpl.startActivator(Bytecode 
PC:22)
4XESTACKTRACE          at 
org/eclipse/osgi/framework/internal/core/BundleContextImpl.start(Bytecode 
PC:23)
4XESTACKTRACE          at 
org/eclipse/osgi/framework/internal/core/BundleHost.startWorker(Bytecode 
PC:381)
4XESTACKTRACE          at 
org/eclipse/osgi/framework/internal/core/AbstractBundle.resume(Bytecode 
PC:22(Compiled Code))
4XESTACKTRACE          at 
org/eclipse/osgi/framework/internal/core/Framework.resumeBundle(Bytecode 
PC:35(Compiled Code))
4XESTACKTRACE          at 
org/eclipse/osgi/framework/internal/core/StartLevelManager.resumeBundles(Bytecode 
PC:91)
4XESTACKTRACE          at 
org/eclipse/osgi/framework/internal/core/StartLevelManager.incFWSL(Bytecode 
PC:33)
4XESTACKTRACE          at 
org/eclipse/osgi/framework/internal/core/StartLevelManager.doSetStartLevel(Bytecode 
PC:236)
4XESTACKTRACE          at 
org/eclipse/osgi/framework/internal/core/StartLevelManager.dispatchEvent(Bytecode 
PC:45)
4XESTACKTRACE          at 
org/eclipse/osgi/framework/eventmgr/EventManager.dispatchEvent(Bytecode 
PC:39(Compiled Code))
4XESTACKTRACE          at 
org/eclipse/osgi/framework/eventmgr/EventManager$EventThread.run(Bytecode 
PC:26)


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