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From: Jeffrey Hundstad <>
To: Artur Skawina <>
Cc: Con Kolivas <>,
	linux list <>,
	ck list <>, Ingo Molnar <>,
	Andrew Morton <>
Subject: Re: [PATCH] sched: rsdl improvements
Date: Wed, 21 Mar 2007 18:48:27 -0500	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Artur Skawina wrote:
> Con Kolivas wrote:
>> Note no interactive boost idea here.
>> Patch is for 2.6.21-rc4-mm1. I have not spent the time trying to bring other
>> bases in sync.
> I've tried RSDLv.31+this on as i'm not tracking -mm.
>> Further improve the deterministic nature of the RSDL cpu scheduler and make
>> the rr_interval tunable.
>> By only giving out priority slots to tasks at the current runqueue's
>> prio_level or below we can make the cpu allocation not altered by accounting
>> issues across major_rotation periods. This makes the cpu allocation and
>> latencies more deterministic, and decreases maximum latencies substantially.
>> This change removes the possibility that tasks can get bursts of cpu activity
>> which can favour towards interactive tasks but also favour towards cpu bound
>> tasks which happen to wait on other activity (such as I/O) and is a net
>> gain.
> I'm not sure this is going in the right direction... I'm writing
> this while compiling a kernel w/ "nice -20 make -j2" and X is almost
Did you mean "nice -20"?  If so, that should have slowed X quite a bit.  
Try "nice 19" instead.

       Run  COMMAND  with an adjusted niceness, which affects process 
scheduling.  With no COMMAND, print the current  niceness.   Nicenesses  
range from -20 (most favorable scheduling) to 19 (least favorable).

  reply	other threads:[~2007-03-21 23:48 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-03-21 17:29 Con Kolivas
2007-03-21 23:27 ` Artur Skawina
2007-03-21 23:48   ` Jeffrey Hundstad [this message]
2007-03-22  0:15     ` Artur Skawina
2007-03-22  0:24     ` Con Kolivas
2007-03-22  0:52       ` Con Kolivas
2007-03-22  2:04         ` [PATCH] sched: rsdl check for niced tasks lowering prio level Con Kolivas
2007-03-22 13:34           ` Artur Skawina
2007-03-21 23:36 ` [PATCH] sched: rsdl improvements Andrew Morton
2007-03-22  5:03   ` Con Kolivas
2007-03-22 14:46 ` Christian

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