From: Arjan van de Ven <arjan-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
To: Colin Cross <ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-pm-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
Len Brown <len.brown-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Kevin Hilman <khilman-l0cyMroinI0@public.gmane.org>,
Santosh Shilimkar
<santosh.shilimkar-l0cyMroinI0@public.gmane.org>,
Amit Kucheria
<amit.kucheria-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Trinabh Gupta <g.trinabh-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Deepthi Dharwar
<deepthi-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>,
linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 0/3] coupled cpuidle state support
Date: Wed, 21 Dec 2011 20:36:12 +0100 [thread overview]
Message-ID: <4EF2352C.3060102@linux.intel.com> (raw)
In-Reply-To: <CAMbhsRRnKoR3YPWrZzVynVe+dcuU5v0siYvmp2vbBcS1hquC7Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
>>
>> .. or it enters WFI, and a physical device sends it an interrupt,
>> at which point it exits.
>
> None of the cpus will return to the idle loop until all cpus have
> decremented the ready counter back to 0, so they can't wrap around
> again.
yikes, so you IPI all the cpus on the first exit.
that must burn power ;-(
next prev parent reply other threads:[~2011-12-21 19:36 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-21 0:09 [PATCH 0/3] coupled cpuidle state support Colin Cross
2011-12-21 0:09 ` [PATCH 1/3] cpuidle: refactor out cpuidle_enter_state Colin Cross
2012-01-04 14:08 ` Jean Pihet
[not found] ` <1324426147-16735-1-git-send-email-ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>
2011-12-21 0:09 ` [PATCH 2/3] cpuidle: fix error handling in __cpuidle_register_device Colin Cross
2011-12-21 0:09 ` [PATCH 3/3] cpuidle: add support for states that affect multiple cpus Colin Cross
2011-12-21 9:02 ` [PATCH 0/3] coupled cpuidle state support Arjan van de Ven
[not found] ` <4EF1A0B4.5080307-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2011-12-21 9:40 ` Colin Cross
2011-12-21 9:44 ` Arjan van de Ven
[not found] ` <4EF1AA8A.8060304-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2011-12-21 9:55 ` Colin Cross
2011-12-21 12:12 ` Arjan van de Ven
2011-12-21 19:05 ` Colin Cross
[not found] ` <CAMbhsRRnKoR3YPWrZzVynVe+dcuU5v0siYvmp2vbBcS1hquC7Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-12-21 19:36 ` Arjan van de Ven [this message]
2011-12-21 19:42 ` Colin Cross
[not found] ` <CAMbhsRSPCo9MSGp57Fv0sRdYUFcdwx8jEz1-CfX8LdKf8X4MVg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-12-22 8:35 ` [linux-pm] " Shilimkar, Santosh
2011-12-22 8:53 ` Arjan van de Ven
2011-12-22 9:30 ` [linux-pm] " Shilimkar, Santosh
[not found] ` <4EF2F01E.8060307-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2011-12-22 21:20 ` Colin Cross
[not found] ` <4EF1CD49.9020800-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2012-03-14 0:39 ` Colin Cross
2012-01-04 0:41 ` Kevin Hilman
2012-01-04 17:27 ` Shilimkar, Santosh
2012-01-20 8:46 ` Daniel Lezcano
2012-01-20 20:40 ` Colin Cross
2012-01-25 14:04 ` Daniel Lezcano
2012-01-31 14:13 ` Daniel Lezcano
[not found] ` <CAMbhsRTbVqV6p0py9NGZrpFPf2yvp-B0dr+o-m7qbdja_-Lfzw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-01-27 8:54 ` [linux-pm] " Vincent Guittot
2012-01-27 17:32 ` Colin Cross
[not found] ` <CAMbhsRQYVXTZ2pX4mBrM6=SyGTqn_GY8xsW4rt_e21zerEzctA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-02-01 12:13 ` Vincent Guittot
2012-02-01 14:59 ` Lorenzo Pieralisi
2012-02-01 17:30 ` [linux-pm] " Colin Cross
2012-02-01 18:07 ` Lorenzo Pieralisi
2012-02-03 1:19 ` Colin Cross
2012-03-13 23:52 ` Kevin Hilman
[not found] ` <8762e8kqi6.fsf-l0cyMroinI0@public.gmane.org>
2012-03-14 0:28 ` Colin Cross
2012-03-14 0:47 ` Colin Cross
[not found] ` <CAMbhsRRD2bdkcUZvScb-cF05e=R3h69bNVaTPFX4jBKBBOjuMg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-03-14 14:23 ` [linux-pm] " Kevin Hilman
2012-03-14 2:04 ` Arjan van de Ven
2012-03-14 2:21 ` Colin Cross
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