Re: [PATCH] Nick's scheduler policy v7

From: Mike Galbraith
Date: Wed Aug 27 2003 - 04:24:58 EST


At 08:41 PM 8/25/2003 +1000, Nick Piggin wrote:
Hi,

Greetings,

I didn't miss 5 revisions, I'll just stick to using my internal
numbering for releases.

This one has a few changes. Children now get a priority boost
on fork, and parents retain more priority after forking a child,
however exiting CPU hogs will now penalise parents a bit.

Timeslice scaling was tweaked a bit. Oh and remember raising X's
priority should _help_ interactivity with this patch, and IMO is
not an unreasonable thing to be doing.

Please test. I'm not getting enough feedback!

Heavy parallel make throughput is still down a little over 10%, but X choppiness is markedly improved. Test-starve is now working. One thing that I noticed is that irman takes quite a bit longer to complete than with stock. I've attached the results of that, plus some contest numbers. My local variant of contest has a couple of differences to stock: dbench doesn't run so many instances, and list_load is just a small tree being md5summed. There are two additional loads as well. ab_load is an ancient apache bench jabbering with an also ancient apache (boring static page via localhost)... you can guess what irman2_load is :)

-Mike

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