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Re: pcscd, sun java, 100% CPU usage



On Jan 2, 2008 6:31 AM, Jeff Krebs <jkrebs tconl com> wrote:
> * Tod Merley (todbot88 gmail com) wrote:
>
> > On Jan 1, 2008 9:51 PM, Jeff Krebs <jkrebs tconl com> wrote:
> > > Oddest issue with pcsc. I'm getting 100% CPU usage while running pcscd.
> > >
> > > Now to story...
> > >
> > > Finally got my CAC Card setup running and working.  I'm able to do what
> > > I need to do with PKI certificates and such.  Athena reader, Athena
> > > driver.  Started with java-1.7.0-icedtea.  Joy and happiness abounding
> > > except...
> > >
> > > IcedTea just wasn't doing it. CNN video wasn't working.  Odds and ends
> > > borked or not functioning.
> > >
> > > Managed to get all SunJava 1.6.0r3 packages built and installed under
> > > Fedora 8.  Even the jdbc and fonts.  My machine passed the Java.com test
> > > and even updated the java applets (hadn't seen that before).  Java works
> > > wonderful, everything seems to function  very well.  Except...
> > >
> > > Now, after removing IcedTea and installing Sun-Java, my CPU is at 100%.
> > > Top shows pcscd as #1, burning over 91% of the CPU.  This is a P4 1.6
> > > Ghz, and I have 1.2 G of RAM. I can stop pcscd through the "Services"
> > > configuration interface (via /usr/sbin/system-config-services).  The
> > > system CPU usage immediately drops to around 7%.  Much weeping and
> > > gnashing of teeth...
> > >
> > > Now, the question.  What's going on?  Why does Java appear to cause a
> > > race condition in pcscd?  I can certainly disable pcscd when I don't
> > > need it, but when I do need it, will I have to face high CPU usage?
> > >
> > >
> > > Jeff Krebs
> > >
> > > --
> > > fedora-list mailing list
> > > fedora-list redhat com
> > > To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
> > >
> >
> > Hi Jeff Krebs!
> >
> > I too do not understand what would make the smart card reader manager
> > go bonkers.  Perhaps Sun's java makes it look for the CAC verification
> > module which perhaps it cannot find?
> >
> > The question your e-mail made me ponder is "how can one find out"
> > "what's going on?". I have found some possible answers. Some I have
> > heard mentioned in this forum.
> >
> > strace - ltrace - lsof ... :
> >
> > http://en.wikipedia.org/wiki/Strace     (also man strace)
> >
> > http://en.wikipedia.org/wiki/Ltrace      (also man ltrace)
> >
> > http://en.wikipedia.org/wiki/Lsof_%28Unix%29  (also man lsof)
> >
> > http://en.wikipedia.org/wiki/Gdb   (also man gdb)
> >
> > Looking from the Java end:
> >
> > http://jamonapi.sourceforge.net/
> >
> > Probably for the developer - The Linux Test Project:
> >
> > http://ltp.sourceforge.net/
> >
> > I have never gone so far into finding the actual problem as these
> > tools can take us.  Hopefully someone who has will chime in.
> >
> > I would love to hear what you do find and how you found it!
> >
> > Good Hunting!
> >
> > Tod
> >
> > --
> > fedora-list mailing list
> > fedora-list redhat com
> > To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
>
> Thank you for the interesting insight and the list of all of the
> development tools.
>
> I rebuilt the rawhide pcsc .src.rpm (version 1.4.4, vice the 1.3.3
> distro provide) and installed.  Seems to do the trick.  Bugzilla
> indicated that others were having this issue as well. Hopefully we'll
> see the update in FC7/F8 soon.
>
>
> Jeff Krebs
>
> --
> fedora-list mailing list
> fedora-list redhat com
> To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
>

Hi Jeff Krebs!

I am very glad to hear that you found your fix and implemented it!
Google Rocks!

I have been wanting to find out about those tools since I heard that
they existed.  Thanks for moving me to find them!

Have a lot of fun!

Tod


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