From: Bruno Ducrot <ducrot@poupinou.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: cpufreq@lists.linux.org.uk
Subject: Re: OnDemand governor vs. work queue
Date: Wed, 25 May 2005 11:59:29 +0200 [thread overview]
Message-ID: <20050525095929.GD32472@poupinou.org> (raw)
In-Reply-To: <1116991600.6395.71.camel@gaston>
On Wed, May 25, 2005 at 01:26:40PM +1000, Benjamin Herrenschmidt wrote:
> Hi !
>
> >From what I've seen, the OnDemand governor works using a timer/workqueue
> pair.
>
> That annoys me a bit as the setup I have on PowerMacs can take several
> ms to transition (due to voltage transition mostly). I don't like the
> idea of hogging keventd that long.
>
> Wouldn't it make sense, especially for setups where transition latency
> is high (by high, I mean significant compared to HZ for example), to
> actually spawn a kthread and do the sampling & switching from there ?
I'm wondering if in that case a userspace daemon will be more suited..
--
Bruno Ducrot
-- Which is worse: ignorance or apathy?
-- Don't know. Don't care.
next prev parent reply other threads:[~2005-05-25 9:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-25 3:26 OnDemand governor vs. work queue Benjamin Herrenschmidt
2005-05-25 9:59 ` Bruno Ducrot [this message]
2005-05-25 21:26 ` Benjamin Herrenschmidt
-- strict thread matches above, loose matches on Subject: below --
2005-05-25 21:34 Pallipadi, Venkatesh
2005-05-25 21:48 ` Benjamin Herrenschmidt
2005-05-25 22:04 ` Venkatesh Pallipadi
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