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Huge DefaultOperationHistory [message #509048]

Thu, 21 January 2010 09:42

Aurélien Pupier

Messages: 637
Registered: July 2009
Location: Grenoble, FRANCE

Senior Member

Hi,

I have a DefaultOperationHistory which is full of EMFOperation :

http://img27.imageshack.us/img27/2728/stackundoredo.jpg

The contexts associated with them are WorkspaceCommandStackImpl$UndoContext.
Sometimes some of these EMFOperations have a huge retained set (keep a lot of memory).
Why all (almost all?) my command (EMF and GMF) are keep in this history with this context? and not only the context of my editor?
How can I remove them when the editor is closed?

I noticed that most of the memory took by EMFOperation is due to DiagramEventThreadSafe. is that normal? Is it needed? Can I remove the reference to the DiagramEventTreadSafe? (in order that it can be GC-ed)

thanks by advance for any hints

Regards,

Aurélien Pupier - Red Hat
Senior Software Engineer in Fuse Tooling team

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Re: Huge DefaultOperationHistory [message #509102 is a reply to message #509048]

Thu, 21 January 2010 07:04

Ed Merks

Messages: 33140
Registered: July 2009

Senior Member

Aurelien,

Given that DiagramEventBrokerThreadSafe is in, I'm wondering if this is
a GMF question rather than an EMF one? If your problem (a leak) is
reproducible in an unmodified generated GMF editor, you should open a
GMF bugzilla to describe how to reproduce it.

Aurelien Pupier wrote:
> Hi,
>
> I have a DefaultOperationHistory which is full of EMFOperation :
>
>
> The contexts associated with them are
> WorkspaceCommandStackImpl$UndoContext.
> Sometimes some of these EMFOperations have a huge retained set (keep a
> lot of memory).
> Why all (almost all?) my command (EMF and GMF) are keep in this
> history with this context? and not only the context of my editor?
> How can I remove them when the editor is closed?
>
> I noticed that most of the memory took by EMFOperation is due to
> DiagramEventThreadSafe. is that normal? Is it needed? Can I remove the
> reference to the DiagramEventTreadSafe? (in order that it can be GC-ed)
>
> thanks by advance for any hints
>
> Regards,
>
>

Ed Merks
Professional Support: https://www.macromodeling.com/

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Re: Huge DefaultOperationHistory [message #509164 is a reply to message #509048]

Thu, 21 January 2010 14:52

Aurélien Pupier

Messages: 637
Registered: July 2009
Location: Grenoble, FRANCE

Senior Member

Ed,

thanks again for your quick answer Smile

I will post on GMF forum about this subject, in order to know why the DiagramEventThreadSafe take all this place and is still referenced.

However it doesn't explain why all these EMFOperation are still there. Maybe I registered it by inadvertance, calling some command with the wrong context, ...
Or it is ordinary that all these EMFOperations are kept in DefaultOperationHistory and what is wrong is that it kept so much memory?

I don't know exactly in which direction I have to look at.

Aurélien Pupier - Red Hat
Senior Software Engineer in Fuse Tooling team

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Re: Huge DefaultOperationHistory [message #509178 is a reply to message #509164]

Thu, 21 January 2010 15:11

Ed Merks

Messages: 33140
Registered: July 2009

Senior Member

Aurelien,

Yes, it's not clear if you've done something wrong or there's something
wrong in the framework. Without a test case, I'm not sure that can be
made clear...

Aurelien Pupier wrote:
> Ed,
>
> thanks again for your quick answer :)
>
> I will post on GMF forum about this subject, in order to know why the
> DiagramEventThreadSafe take all this place and is still referenced.
>
> However it doesn't explain why all these EMFOperation are still there.
> Maybe I registered it by inadvertance, calling some command with the
> wrong context, ...
> Or it is ordinary that all these EMFOperations are kept in
> DefaultOperationHistory and what is wrong is that it kept so much memory?
>
> I don't know exactly in which direction I have to look at.

Ed Merks
Professional Support: https://www.macromodeling.com/

Report message to a moderator

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