Re: using Smack API with GNU Classpath

[Jan Pannecoeck <jpa@xxxxxxxxxxxx>]

Hello,

I didn't know I was talking to the builder of JamVM!!! Now I was reading 
the version details and saw your name behind the copyright!! Nice work 
with the JamVM!!! I've been testing different vm's and still my favorite 
one is JamVM! Especially for embedded devices!

But to go back on-topic, I've compiled the JamVM 1.5.2 with GNU 
Classpath 0.98 on my desktop, since the problem also occurred on my 
desktop I thought it would be easier to compile, since the 
cross-compilation isn't always that easy... And as you said, that my 
problems could be solved...Well they are solved! The program that was 
running at 100% CPU is now running at 0-1% CPU so that's nice!

Thanks for your advice about the latest version of JamVM!
Kind regards and keep up the great work with JamVM!!
Jan

Robert Lougher wrote:
> P.S.  Unfortunately, to upgrade to 1.5.2, you'll also need to upgrade
> GNU Classpath to 0.98...
>
> Rob.
>
> 2009/2/16 Robert Lougher <rob.lougher@xxxxxxxxx>:
>   
> > Hi Jan,
> >
> > 2009/2/16 Jan Pannecoeck <jpa@xxxxxxxxxxxx>:
> >     
> > > Hello Robert,
> > >
> > > I'm using JamVM 1.5.0 at the ARM and JamVM 1.4.5 at my desktop pc. Is the
> > > problem you described also in those versions, or only in the 1.5.1 version?
> > >
> > >       
> > Yes, the problem is in both 1.4.5 and 1.5.0 (JSR 166 support was added
> > in 1.4.5, with an inefficient park/unpark implementation -- this has
> > finally been replaced in 1.5.2).
> >
> > Rob.
> >
> >     
> > > Thanks for your reply!
> > > Jan
> > >
> > > Robert Lougher wrote:
> > >       
> > > > Hi Jan,
> > > >
> > > > 2009/2/16 Jan Pannecoeck <jpa@xxxxxxxxxxxx>:
> > > >
> > > >         
> > > > > Hello everyone,
> > > > >
> > > > > I'm a Java Developer and I'm working mainly with embedded devices. Now
> > > > > I'm
> > > > > running JamVM with GNU Classpath on an ARM processor. This is all working
> > > > > fine, and I didn't had any big problems until now... I'll try to explain
> > > > > my
> > > > > problem as good as possible, but if someone needs some more information,
> > > > > you
> > > > > can contact me ofcourse!
> > > > >
> > > > > So, I'm using the Smack API to get an XMPPConnection with my XMPPServer.
> > > > > This is working, but my CPU is running at 100%! I do have the same
> > > > > problem
> > > > > (CPU at 100%) when I try to run this java program on my desktop computer
> > > > > with JamVM and GNU Classpath. When I run it using Sun's JVM, the CPU load
> > > > > is
> > > > > around 0-1 %.
> > > > >
> > > > > I don't have any clue what this problem could be causing, I'm trying to
> > > > > find
> > > > > out what part of the Smack API is causing the problems, but at the moment
> > > > > I
> > > > > log-in to the server, the CPU jumps to 100%... Could this be caused by
> > > > > some
> > > > > encryption that's been used by Smack? Since the Smack API needs a
> > > > > KeyStoreType, I'm using the gkr type since that's the one supported by
> > > > > GNU
> > > > > Classpath...
> > > > >
> > > > > If anyone had this kind of problems before with GNU Classpath, or could
> > > > > solve my problem, this would be great!! Any help would be welcome since
> > > > > I'm
> > > > > quite stuck with this...
> > > > >
> > > > >
> > > > >           
> > > > What version of JamVM are you using?  It's possible some code you're
> > > > running is using the new concurrency API (JSR 166).  In JamVM 1.5.1,
> > > > park/unpark was incomplete and could use 100% CPU.  This is fixed in
> > > > 1.5.2.
> > > >
> > > > Rob.
> > > >
> > > >
> > > >         
> > > > > Kind regards,
> > > > > Jan
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >           
> > > >         
>
>