Have you tried isolcpu for the real-time?

RTAI will reduce system responsiveness, but not by much if no real-time
software is running.  You should try booting into a generic kernel and
seeing if the kmail problem persists.  If you don't have a generic kernel,
it's rather easy to build one with the help of google.  Linux will tolerate
many kernel builds on the same system, I think my desktop probably has a
couple dozen by now.  I think I scanned your message well enough to tell
that you didn't do this yet.  I think this is a necessary first step before
you try to open a bug report.  It may be helpful to d/l the kernel package
for the r/t kernel from linuxcnc and look at the config.
Eric


On Wed, Aug 1, 2012 at 12:14 PM, Gene Heskett <[email protected]> wrote:

> On Wednesday 01 August 2012 11:59:45 Dave Caroline did opine:
>
> > open a terminal type top
>
> I keep htop running full time
>
> > look what processes are up to
> > do you have a large %wa (waiting on io)
>
> ran top, see 0.2%wa occasionally, usually 0.0%wa, string of incoming mail
> ran it up to 5.4%wa once.
>
> > is a process pinned at 100% fix/remove/diagnose/stop using
>
> no, cpu (any of them) is 3% even when kmail is frozen.
>
> > also fix dns/web connections, any dns and reverse dns check will try
> > for 30secs before timeout
> > look in logs for clues
>
> It isn't a consistent delay time, and gkrellm shows no network activity
> before the 1 pops up in the outbox.  I thought about that, even installed
> dnsmasq, made no diff.  The lag time is random with a max of about 45
> seconds.  But it could just as easily be 2 seconds per step too.
>
> No clues or even hints in the logs.
>
> > Dave Caroline
> >
> Thanks Dave.
>
> Cheers, Gene
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> My web page: <http://coyoteden.dyndns-free.com:85/gene> is up!
> Your ignorance cramps my conversation.
>
>
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