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Date:      Sat, 21 Aug 2010 12:25:17 -0700
From:      Doug Barton <dougb@FreeBSD.org>
To:        Andriy Gapon <avg@icyb.net.ua>
Cc:        freebsd-current@FreeBSD.org
Subject:   Re: Latest intr problems
Message-ID:  <4C70281D.9030907@FreeBSD.org>
In-Reply-To: <4C6F9DD4.3050205@icyb.net.ua>
References:  <alpine.BSF.2.00.1008201701001.19740@qbhto.arg> <4C6F772A.5020703@icyb.net.ua> <4C6F7BD1.4030009@icyb.net.ua> <alpine.BSF.2.00.1008210028530.1718@qbhto.arg> <4C6F9DD4.3050205@icyb.net.ua>

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On 08/21/2010 02:35, Andriy Gapon wrote:
> BTW, if you run procstat -k 11 a few times during the condition, does TID 100006
> typically have or not have "lock_mtx softclock" substring in its stack?

Not. I ran 'procstat -k 11 | grep 100006' about 20 times, and all but 
one looked like this:

11 100006 intr             swi4: clock      mi_switch ithread_loop 
fork_exit  fork_trampoline

The one that didn't looked like this:

11 100006 intr             swi4: clock      mi_switch turnstile_wait 
_mtx_lock_sleep _mtx_lock_flags lock_mtx softclock 
intr_event_execute_handlers ithread_loop fork_exit fork_trampoline

It just ran away again with the only change being cx_lowest=C1. I'll try 
changing the event timer next.


Doug

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