linux-kernel - Re: [PATCH] timers: Introduce the concept of timer slack for legacy timers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Thu, 14 Jan 2010 01:53:29 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, tglx@...x.de, mingo@...e.hu,
	Cyrill Gorcunov <gorcunov@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] timers: Introduce the concept of timer slack for legacy
 timers

On Wed, 13 Jan 2010 22:07:55 -0800
Andrew Morton <akpm@...ux-foundation.org> wrote:
> hm.
> 
> Have you any feeling for how much power this sort of thing saves?  I
> guess "change in interrupts per minute" would be easy to measure.

depends on what kind of system obviously. For a laptop, it's not all
that much, but for a cellphone it can be easily 30% to 40% extra
standby power.... a few wakeups per second already is a huge power
delta for those.



-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/