linux-kernel - Re: [RFC 5/8] Track the "total rq utilisation" too

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Message-ID: <20160115075049.1e24bde8@luca-1225C>
Date:	Fri, 15 Jan 2016 07:50:49 +0100
From:	Luca Abeni <luca.abeni@...tn.it>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	Juri Lelli <juri.lelli@....com>
Subject: Re: [RFC 5/8] Track the "total rq utilisation" too

On Thu, 14 Jan 2016 20:48:37 +0100
Peter Zijlstra <peterz@...radead.org> wrote:

> On Thu, Jan 14, 2016 at 04:24:50PM +0100, Luca Abeni wrote:
> > This is the sum of the utilisations of tasks that are assigned to
> > a runqueue, independently from their state (TASK_RUNNING or blocked)
> 
> Is it actually used?
Not in this patchset...
It is a possible "cheap" (but less accurate) alternative to the
tracking introduced in patch 4. Or can be used in more advanced
implementations of multi-processor GRUB, but not in this patchset.

So, it can be removed from the patchset; I added it so that people can
see all the possible alternative utilization tracking strategies.


		Thanks,
			Luca