linux-kernel - Re: [patch v4 07/18] sched: set initial load avg of new forked task

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Message-ID: <1360664784.4485.17.camel@laptop>
Date:	Tue, 12 Feb 2013 11:26:24 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Alex Shi <alex.shi@...el.com>
Cc:	torvalds@...ux-foundation.org, mingo@...hat.com,
	tglx@...utronix.de, akpm@...ux-foundation.org,
	arjan@...ux.intel.com, bp@...en8.de, pjt@...gle.com,
	namhyung@...nel.org, efault@....de, 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 07/18] sched: set initial load avg of new forked task

On Thu, 2013-01-24 at 11:06 +0800, Alex Shi wrote:
> +       /*
> +        * set the initial load avg of new task same as its load
> +        * in order to avoid brust fork make few cpu too heavier
> +        */
> +       if (flags & ENQUEUE_NEWTASK)
> +               se->avg.load_avg_contrib = se->load.weight; 

I seem to have vague recollections of a discussion with pjt where we
talk about the initial behaviour of tasks; from this haze I had the
impression that new tasks should behave like full weight..

PJT is something more fundamental screwy?

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