linux-kernel - Re: [linux-pm] [RFC] Asynchronous suspend/resume

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Date:	Sat, 26 Dec 2009 07:57:17 +1100
From:	Nigel Cunningham <ncunningham@...a.org.au>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Jiri Slaby <jslaby@...e.cz>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [linux-pm] [RFC] Asynchronous suspend/resume - test results

Rafael J. Wysocki wrote:
> On Thursday 24 December 2009, Nigel Cunningham wrote:
>> Hi.
> 
> Hi, 
> 
>> I built the async branch of your tree and tested it, also running
>> 2.6.33-rc1 + TuxOnIce for comparison. Dmesg for both are attached. Is
>> there anything I can/should be doing for you on top of this?
> 
> No, thanks a lot.
> 
>> I'll try Dmitry's patch on top of this a little later - other things to do first.
> 
> No need for that, the patchset contains an equivalent of the Dmitry's patch.
> 
>> I noticed that you were doing standard deviations in your stats - how
>> many runs were you basing them on?
> 
> I usually run 10 iterations of suspend-resume for each configuration.
> The raw data are at http://www.sisk.pl/kernel/data/async-suspend-updated.pdf
> if you're interested.
> 
>> Not sure that I can be bothered to do too many - too much else to do!
> 
> Sure, thanks a lot anyway.  Your data confirn that there's a measurable gain
> from suspending and resuming devices asynchronously.

It did? I thought it showed no difference at all!

I'll see if I can find the time to do the other computers, then. We're
going away for a couple of weeks on Monday, though, so I'm not sure that
I'll get the time beforehand.

Nigel
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