From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Lezcano Subject: Re: [PATCH] clocksource/drivers/tegra: allow timer irq affinity change Date: Tue, 27 Oct 2015 11:14:59 +0100 Message-ID: <562F4EA3.7000202@linaro.org> References: <1445787630-13251-1-git-send-email-dev@lynxeye.de> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <1445787630-13251-1-git-send-email-dev-8ppwABl0HbeELgA04lAiVw@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Lucas Stach , Thomas Gleixner Cc: Stephen Warren , Thierry Reding , Alexandre Courbot , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-tegra@vger.kernel.org On 10/25/2015 04:40 PM, Lucas Stach wrote: > Allow the timer core to change the smp affinity of the broadcast time= r > irq by setting CLOCK_EVT_FEAT_DYNIRQ flag. > > This reduces interrupt pressure and wakeups on CPU0 as well as vastly > reducing the number of timer broadcast IPIs. Did you test this patch on a tegra2 ? --=20 Linaro.org =E2=94=82 Open source software fo= r ARM SoCs =46ollow Linaro: Facebook | Twitter | Blog From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753034AbbJ0KPG (ORCPT ); Tue, 27 Oct 2015 06:15:06 -0400 Received: from mail-wi0-f179.google.com ([209.85.212.179]:38862 "EHLO mail-wi0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751132AbbJ0KPD (ORCPT ); Tue, 27 Oct 2015 06:15:03 -0400 Subject: Re: [PATCH] clocksource/drivers/tegra: allow timer irq affinity change To: Lucas Stach , Thomas Gleixner References: <1445787630-13251-1-git-send-email-dev@lynxeye.de> Cc: Stephen Warren , Thierry Reding , Alexandre Courbot , linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org From: Daniel Lezcano Message-ID: <562F4EA3.7000202@linaro.org> Date: Tue, 27 Oct 2015 11:14:59 +0100 User-Agent: Mozilla/5.0 (X11; Linux i686; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <1445787630-13251-1-git-send-email-dev@lynxeye.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/25/2015 04:40 PM, Lucas Stach wrote: > Allow the timer core to change the smp affinity of the broadcast timer > irq by setting CLOCK_EVT_FEAT_DYNIRQ flag. > > This reduces interrupt pressure and wakeups on CPU0 as well as vastly > reducing the number of timer broadcast IPIs. Did you test this patch on a tegra2 ? -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog