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Re: pcscd, sun java, 100% CPU usage



* 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

I did find something after a bit of searching on-line:

https://bugzilla.redhat.com/show_bug.cgi?id=374291

I'm not sure that the issue is related to SunJava.  The Fedora pcsc-lite 
is currently at 1.3.3, and there have been five releases since then, 
culminating in release 1.4.4.

On bugzilla, someone mentioned that 1.4.4 took care of the issue; I'll 
roll my own pcsc-lite RPMs and see if that helps the issue.

Jeff Krebs


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