[icedtea-web-1.4] running sevrial plugins in parallel

[Adam Domurad]

Efrat Lefeber <ELefeber at ...> writes:

> 
> How do I disable the extended applet security?

You can do it through the itw-settings program. Although, this file locking
should only occur briefly on applet loading. You can try profiling with
visualvm or similar perhaps.

Happy hacking,
-Adam Domurad

> 
> -----Original Message-----
> From: Jiri Vanek [mailto:jvanek at ...]
> Sent: Monday, February 24, 2014 9:25 AM
> To: Efrat Lefeber; distro-pkg-dev at ...
> Subject: Re: [icedtea-web-1.4] running sevrial plugins in parallel
> 
> On 02/23/2014 01:56 PM, Efrat Lefeber wrote:
> > I see there are all kind of FileLocks in the java side to synchronize
between processes. For example in
net/sourceforge/jnlp/util/lockingfile/LockedFile.java.
> > Do you know why there is a need to synchronize between processes?
> 
> Yes. Those file should be accessed only by one process/thread per time.
> I it is used only  for Extended Applets security. And there is important
that only one  process write to it in
> time. And all others then pick up the fresh version. And act based on this
action.
> 
> If you suspect this, you may try to disable extended applets security in
itw-settings or in code , but i doubt
> a bit.
> 
> Thank you for digging into it!
> 
> J.
> >
> > -----Original Message-----
> > From: Jiri Vanek [mailto:jvanek at ...]
> > Sent: Tuesday, February 18, 2014 10:36 AM
> > To: Efrat Lefeber; distro-pkg-dev at ...
> > Subject: Re: [icedtea-web-1.4] running sevrial plugins in parallel
> >
> > On 02/18/2014 09:28 AM, Efrat Lefeber wrote:
> >> If you have several browsers running, each browser loads a different
plugin instance which loads a
> different jvm instance.
> >
> > Ah, yes. Sorry I did not realize, but it is obvious. I would probably
call it a bug:)
> >
> > TBH, this state was never examined nor profiled. Sorry:( but well it is
not common :) )
> >
> > I will look onto it, but it will take time. Just for curiosity - what is
an usecase?
> >
> > the workaround like "run just single browser" is probably unsuitable :)
> >
> > Sorry, funny morning here:)
> >     As I told, I will try to look whats hidden in this usecase.
> >      J.
> >>
> >> -----Original Message-----
> >> From: Jiri Vanek [mailto:jvanek at ...]
> >> Sent: Tuesday, February 18, 2014 9:35 AM
> >> To: Efrat Lefeber; distro-pkg-dev at ...
> >> Subject: Re: [icedtea-web-1.4] running sevrial plugins in parallel
> >>
> >> On 02/17/2014 11:05 AM, Efrat Lefeber wrote:
> >>> I am running several plugin processes in parallel (each runs its own
jvm). No more than 5-6 in parallel.
> >>
> >> Hi!
> >>
> >> How have you manged it? All applets are supposed to run in single JVM.
> >>>
> >>> What I see a degradation in performance when there are more plugin
processes running.
> >>>
> >>> Is there some kind of a lock between processes that could implement on
the performance?
> >>>
> >>> Or any other idea why the performance gets worse when more plugin
processes run in parallel?
> >>>
> >>>
> >>
> >> Regards,
> >>       J.
> >>
> >>
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> >
> >
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> This transmission may contain information that is privileged,
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> disclosure, copying, distribution, or use of the information contained
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