Message-ID: <3F59390F.8070902@cyberone.com.au>
Date: Sat, 06 Sep 2003 11:31:59 +1000
From: Nick Piggin <piggin@cyberone.com.au>
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To: Robert Love <rml@tech9.net>
CC: Mike Fedyk <mfedyk@matchmail.com>, "Martin J. Bligh" <mbligh@aracnet.com>,
       linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Nick's scheduler policy v12
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Robert Love wrote:

>On Fri, 2003-09-05 at 16:39, Mike Fedyk wrote:
>
>
>>Exactly.  Because the larger time slices for lower nice values came from
>>O(1), not Con.
>>
>
>The larger timeslices may not help, but one reason why renicing X hurts
>multimedia is that it gives a preference to the GUI over the multimedia
>thread(s).
>
>Look at it this way.  Assume renicing X does not _help_ whatever the
>problem is (simply because the problem, in this case, is not stemming
>from X).  Then giving X the higher priority and larger timeslice only
>adversely affects the problem.
>
>So, since the multimedia thread in (say) xmms is really unrelated to X
>(its a separate thread and not doing any Xlib calls), it just hurts it.
>

Hi Robert,
Yeah you are right. Backboost is sort of an implicit renice though,
except it doesn't always go where you want it or when you want :(

I have found that is enough to have good scheduling latency to ensure
xmms skips are difficult to produce.


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