linux-kernel - Re: [RFC] Static/Runtime CPU/IO bound scheduling polices based on CPU(s) to support complete spectrum of tasks

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Message-Id: <1239278579.11859.3.camel@ht.satnam>
Date:	Thu, 09 Apr 2009 17:32:59 +0530
From:	Jaswinder Singh Rajput <jaswinder@...nel.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Woodhouse <dwmw2@...radead.org>,
	David Miller <davem@...emloft.net>,
	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...nel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [RFC] Static/Runtime CPU/IO bound scheduling polices based on
 CPU(s) to support complete spectrum of tasks

On Thu, 2009-04-09 at 13:38 +0200, Peter Zijlstra wrote:
> On Thu, 2009-04-09 at 15:56 +0530, Jaswinder Singh Rajput wrote:
> > On Tue, 2009-04-07 at 17:02 +0530, Jaswinder Singh Rajput wrote:
> > > On Tue, 2009-04-07 at 12:58 +0200, Andi Kleen wrote:
> > > > On Tue, Apr 07, 2009 at 03:55:31PM +0530, Jaswinder Singh Rajput wrote:
> > > > > I am planning to prepare the followings:
> > > > 
> > > > This seems all quite vague. Perhaps it would be good if you started
> > > > with a clear definition what problem you're trying to solve.
> > > > 
> > > 
> > 
> > I do not surprise, if this approach seems vague to many developers
> > because this is many years ahead of time.
> 
> Yes, or not.
> 
> For partitioning we have cpusets, for scheduler policies we have
> sched_setscheduler().
> 
> The only thing we do not have are deadline schedulers, but people are
> working on that -- its a rather complex piece of work.
> 
> The rest of you babbling is hand-waving about heuristics.

I do not know what you read and what you understand.

Can we change the schedulers at runtime ?

Can we specify:
 Task 1-100: Scheduler1
 Task 101-200: Scheduler2

--
JSR

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