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Date:      Thu, 19 Aug 2010 10:30:36 -0700
From:      Doug Barton <dougb@FreeBSD.org>
To:        Andriy Gapon <avg@icyb.net.ua>
Cc:        freebsd-current@FreeBSD.org
Subject:   Re: Runaway intr, not flash related
Message-ID:  <4C6D6A3C.9020507@FreeBSD.org>
In-Reply-To: <4C6D4CB4.20601@icyb.net.ua>
References:  <alpine.BSF.2.00.1008121349230.1721@qbhto.arg> <4C6D4CB4.20601@icyb.net.ua>

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On 08/19/2010 08:24, Andriy Gapon wrote:
> I am sorry, but I don't see anything dramatically wrong here. So
> "swi4: clock" uses 5.76% of WCPU, is that such a big deal to be
> called "runaway intr"?

That's the symptom.

> A lot of CPU time is idle and a lot is used by userland processes
> (e.g. Xorg). Can you provide data that better illustrate your
> problem?

The problem is that when this happens, the system becomes unusable. 
Videos stop playing, switching between windows takes more and more time, 
mail client is painfully slow, etc. If I leave the system alone when 
this starts happening the clock eventually consumes all CPU, the system 
freezes, or it crashes. Since the last 2 require a full fsck to recover 
from I tend to power down first. :)

BTW, something interesting happened the other day. I was having this 
problem over and over with the same hulu video, so I finally switched to 
windows in order to just finish watching it. After about 5 minutes 
watching the same show in windows the video started to stall just like 
it had in freebsd, but after about 5 seconds of that it "caught up" with 
itself, and I was able to watch the last 20 or so minutes without any 
problems.


Doug

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