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Date:      Tue, 13 Dec 2011 20:37:42 -0500
From:      George Mitchell <george+freebsd@m5p.com>
To:        freebsd-stable@freebsd.org
Subject:   Re: SCHED_ULE should not be the default
Message-ID:  <4EE7FDE6.2010006@m5p.com>
In-Reply-To: <20111213230215.GA83159@blazingdot.com>
References:  <4EE1EAFE.3070408@m5p.com> <4EE22421.9060707@gmail.com> <4EE6060D.5060201@mail.zedat.fu-berlin.de> <4EE69C5A.3090005@FreeBSD.org> <20111213230215.GA83159@blazingdot.com>

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On 12/13/11 18:02, Marcus Reid wrote:
> [...]
> The issues that I've seen with ULE on the desktop seem to be caused by X
> taking up a steady amount of CPU, and being demoted from being an
> "interactive" process.  X then becomes the bottleneck for other
> processes that would otherwise be "interactive".  Try 'renice -20
> <pid_of_X>' and see if that makes your problems go away.
>
> Marcus
> [...]

renice on X has no effect.  Stopping my compute-bound dnetc process
immediately speeds everything up; restarting it slows it back down.


On 12/13/11 19:01, mdf@freebsd.org wrote:
 > [...]
 > Has anyone experiencing problems tried to set sysctl 
kern.sched.steal_thresh=1 ?
 > [...]

1 appears to be the default value for kern.sched.steal_thresh.

-- George Mitchell



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