From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932911AbbLROn6 (ORCPT ); Fri, 18 Dec 2015 09:43:58 -0500 Received: from mail-wm0-f52.google.com ([74.125.82.52]:35115 "EHLO mail-wm0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932689AbbLROSe (ORCPT ); Fri, 18 Dec 2015 09:18:34 -0500 From: Daniel Lezcano To: tglx@linutronix.de Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, mingo@kernel.org, Lucas Stach , Stephen Warren , Thierry Reding , Alexandre Courbot , linux-tegra@vger.kernel.org (open list:TEGRA ARCHITECTUR...) Subject: [PATCH 04/69] clocksource/drivers/tegra: Allow timer irq affinity change Date: Fri, 18 Dec 2015 15:17:17 +0100 Message-Id: <1450448302-27429-4-git-send-email-daniel.lezcano@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1450448302-27429-1-git-send-email-daniel.lezcano@linaro.org> References: <5672CB9E.7090707@linaro.org> <1450448302-27429-1-git-send-email-daniel.lezcano@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lucas Stach 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. Signed-off-by: Lucas Stach Signed-off-by: Daniel Lezcano --- drivers/clocksource/tegra20_timer.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/clocksource/tegra20_timer.c b/drivers/clocksource/tegra20_timer.c index 6ebda11..38333ab 100644 --- a/drivers/clocksource/tegra20_timer.c +++ b/drivers/clocksource/tegra20_timer.c @@ -96,7 +96,8 @@ static struct clock_event_device tegra_clockevent = { .name = "timer0", .rating = 300, .features = CLOCK_EVT_FEAT_ONESHOT | - CLOCK_EVT_FEAT_PERIODIC, + CLOCK_EVT_FEAT_PERIODIC | + CLOCK_EVT_FEAT_DYNIRQ, .set_next_event = tegra_timer_set_next_event, .set_state_shutdown = tegra_timer_shutdown, .set_state_periodic = tegra_timer_set_periodic, -- 1.9.1