From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kevin Hilman Subject: Re: [PATCH 0/3] coupled cpuidle state support Date: Tue, 03 Jan 2012 16:41:27 -0800 Message-ID: <87sjjw70zs.fsf@ti.com> References: <1324426147-16735-1-git-send-email-ccross@android.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1324426147-16735-1-git-send-email-ccross@android.com> (Colin Cross's message of "Tue, 20 Dec 2011 16:09:04 -0800") List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Colin Cross Cc: Len Brown , Trinabh Gupta , Deepthi Dharwar , linux-kernel@vger.kernel.org, Amit Kucheria , Santosh Shilimkar , linux-tegra@vger.kernel.org, linux-pm@lists.linux-foundation.org, linux-omap@vger.kernel.org, Arjan van de Ven , linux-arm-kernel@lists.infradead.org List-Id: linux-omap@vger.kernel.org Colin Cross writes: > This patch series implements an alternative solution, where each > cpu will wait in the WFI state until all cpus are ready to enter > a coupled state, at which point the coupled state function will > be called on all cpus at approximately the same time. This looks great, and is certainly preferred to hotplug IMO. [...] > None of the platforms I work with have an SMP idle implementation > upstream, so I can't easily show a patch that converts a platform > from hotplug governor to coupled cpuidle states. Basic OMAP4 CPUidle support is in now queued for v3.3 (see omap4 branch Tony's tree[1].) Can you (or Santosh) send a patch that adds coupled support to that driver so it can see some broader testing on OMAP4? Thanks, Kevin [1] git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap.git From mboxrd@z Thu Jan 1 00:00:00 1970 From: khilman@ti.com (Kevin Hilman) Date: Tue, 03 Jan 2012 16:41:27 -0800 Subject: [PATCH 0/3] coupled cpuidle state support In-Reply-To: <1324426147-16735-1-git-send-email-ccross@android.com> (Colin Cross's message of "Tue, 20 Dec 2011 16:09:04 -0800") References: <1324426147-16735-1-git-send-email-ccross@android.com> Message-ID: <87sjjw70zs.fsf@ti.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Colin Cross writes: > This patch series implements an alternative solution, where each > cpu will wait in the WFI state until all cpus are ready to enter > a coupled state, at which point the coupled state function will > be called on all cpus at approximately the same time. This looks great, and is certainly preferred to hotplug IMO. [...] > None of the platforms I work with have an SMP idle implementation > upstream, so I can't easily show a patch that converts a platform > from hotplug governor to coupled cpuidle states. Basic OMAP4 CPUidle support is in now queued for v3.3 (see omap4 branch Tony's tree[1].) Can you (or Santosh) send a patch that adds coupled support to that driver so it can see some broader testing on OMAP4? Thanks, Kevin [1] git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap.git From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755257Ab2ADAle (ORCPT ); Tue, 3 Jan 2012 19:41:34 -0500 Received: from na3sys009aog107.obsmtp.com ([74.125.149.197]:48120 "EHLO na3sys009aog107.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754643Ab2ADAlc (ORCPT ); Tue, 3 Jan 2012 19:41:32 -0500 From: Kevin Hilman To: Colin Cross Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@lists.linux-foundation.org, Len Brown , Santosh Shilimkar , Amit Kucheria , Arjan van de Ven , Trinabh Gupta , Deepthi Dharwar , linux-omap@vger.kernel.org, linux-tegra@vger.kernel.org Subject: Re: [PATCH 0/3] coupled cpuidle state support Organization: Texas Instruments, Inc. References: <1324426147-16735-1-git-send-email-ccross@android.com> Date: Tue, 03 Jan 2012 16:41:27 -0800 In-Reply-To: <1324426147-16735-1-git-send-email-ccross@android.com> (Colin Cross's message of "Tue, 20 Dec 2011 16:09:04 -0800") Message-ID: <87sjjw70zs.fsf@ti.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Colin Cross writes: > This patch series implements an alternative solution, where each > cpu will wait in the WFI state until all cpus are ready to enter > a coupled state, at which point the coupled state function will > be called on all cpus at approximately the same time. This looks great, and is certainly preferred to hotplug IMO. [...] > None of the platforms I work with have an SMP idle implementation > upstream, so I can't easily show a patch that converts a platform > from hotplug governor to coupled cpuidle states. Basic OMAP4 CPUidle support is in now queued for v3.3 (see omap4 branch Tony's tree[1].) Can you (or Santosh) send a patch that adds coupled support to that driver so it can see some broader testing on OMAP4? Thanks, Kevin [1] git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap.git