Re: [PATCH] Nick's scheduler policy v12

[Nick Piggin <piggin@cyberone.com.au>]

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.