From: Arjan van de Ven <arjan@infradead.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Gregory Haskins <ghaskins@novell.com>,
Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@elte.hu>,
LKML <linux-kernel@vger.kernel.org>,
Jon Masters <jonathan@jonmasters.org>
Subject: Re: sched: deep power-saving states
Date: Wed, 22 Oct 2008 12:55:08 -0700 [thread overview]
Message-ID: <20081022125508.2ccea6e1@infradead.org> (raw)
In-Reply-To: <1224704992.20069.71.camel@twins>
On Wed, 22 Oct 2008 21:49:52 +0200
Peter Zijlstra <peterz@infradead.org> wrote:
>
> This still leaves us with the worst case IRQ response as given by the
> deepest C state. Which might be un-desirable.
that's a different problem in a different problem space.
>
> jcm was, once upon a time, working on dynamically changing the idle
> routine, so that people who care about wakeup latency can run
> idle=poll while their application runs, and the acpi C state stuff
> when nobody cares.
>
> This could of course then be tied into the PM QoS stuff Mark has been
> doing.
in fact you already have this *exactly* today; this isn't future
technology.
--
Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,
visit http://www.lesswatts.org
next prev parent reply other threads:[~2008-10-22 19:55 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-22 13:42 Gregory Haskins
2008-10-22 13:47 ` Arjan van de Ven
2008-10-22 14:05 ` Gregory Haskins
2008-10-22 14:07 ` Arjan van de Ven
2008-10-22 14:26 ` Gregory Haskins
2008-10-22 14:36 ` Arjan van de Ven
2008-10-22 19:49 ` Peter Zijlstra
2008-10-22 19:55 ` Arjan van de Ven [this message]
2008-10-22 20:05 ` Peter Zijlstra
2008-10-22 20:12 ` Arjan van de Ven
2008-10-22 13:44 Gregory Haskins
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