linux-kernel - Re: [linux-pm] [PATCH] pm: Add runtime PM statistics to sysfs

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Message-ID: <20100710092942.1fa1d80c@infradead.org>
Date:	Sat, 10 Jul 2010 09:29:42 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	linux-pm@...ts.linux-foundation.org, <linux-kernel@...r.kernel.org>
Subject: Re: [linux-pm] [PATCH] pm: Add runtime PM statistics to sysfs

On Fri, 9 Jul 2010 11:11:06 -0400 (EDT)
Alan Stern <stern@...land.harvard.edu> wrote:
> 
> This is because update_pm_runtime_accounting() doesn't take into 
> account the existence of the RPM_RESUMING and RPM_SUSPENDING states;
> it treats them all the same as RPM_ACTIVE.

this is by design fwiw; I'm considering the time spent going in and out
of suspend as "active", it's a little on the conservative side, but the
underlying assumption is that you're still burning power until you're
really suspended. Better to be conservative and not count it as really
suspended....


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
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