linux-kernel - Re: [patch v4 0/18] sched: simplified fork, release load avg and power awareness scheduling

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Date:	Mon, 28 Jan 2013 16:55:58 +0100
From:	Mike Galbraith <efault@....de>
To:	Borislav Petkov <bp@...en8.de>
Cc:	Alex Shi <alex.shi@...el.com>, torvalds@...ux-foundation.org,
	mingo@...hat.com, peterz@...radead.org, tglx@...utronix.de,
	akpm@...ux-foundation.org, arjan@...ux.intel.com, pjt@...gle.com,
	namhyung@...nel.org, vincent.guittot@...aro.org,
	gregkh@...uxfoundation.org, preeti@...ux.vnet.ibm.com,
	viresh.kumar@...aro.org, linux-kernel@...r.kernel.org
Subject: Re: [patch v4 0/18] sched: simplified fork, release load avg and
 power awareness scheduling

On Mon, 2013-01-28 at 16:22 +0100, Borislav Petkov wrote: 
> On Mon, Jan 28, 2013 at 12:40:46PM +0100, Mike Galbraith wrote:
> > > No no, that's not restricted to one node.  It's just overloaded because
> > > I turned balancing off at the NODE domain level.
> > 
> > Which shows only that I was multitasking, and in a rush.  Boy was that
> > dumb.  Hohum.
> 
> Ok, let's take a step back and slow it down a bit so that people like me
> can understand it: you want to try it with disabled load balancing on
> the node level, AFAICT. But with that many tasks, perf will suck anyway,
> no? Unless you want to benchmark the numa-aware aspect and see whether
> load balancing on the node level feels differently, perf-wise?

The broken thought was, since it's not wakeup path, stop node balance..
but killing all of it killed FORK/EXEC balance, oops.

I think I'm done with this thing though.  See mail I just sent.   There
are better things to do than letting box jerk my chain endlessly ;-)

-Mike

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