From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754793AbcHSIZp (ORCPT ); Fri, 19 Aug 2016 04:25:45 -0400 Received: from mail-pa0-f41.google.com ([209.85.220.41]:35861 "EHLO mail-pa0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754479AbcHSIZb (ORCPT ); Fri, 19 Aug 2016 04:25:31 -0400 From: Alex Shi Cc: Daniel Lezcano , Rasmus Villemoes , Arjan van de Ven , Rik van Riel , "Rafael J. Wysocki" , linux-kernel@vger.kernel.org (open list) Subject: [PATCH 3/4] cpuidle/menu: stop seeking deeper idle if current state is too deep Date: Fri, 19 Aug 2016 16:25:13 +0800 Message-Id: <1471595114-1688-3-git-send-email-alex.shi@linaro.org> X-Mailer: git-send-email 2.8.1.101.g72d917a In-Reply-To: <1471595114-1688-1-git-send-email-alex.shi@linaro.org> References: <1471595114-1688-1-git-send-email-alex.shi@linaro.org> To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The obsolete commit 71abbbf85 want to introduce a dynamic cstates, but it was removed for long time. Just left the nonsense deeper cstate checking. Since all target_residency and exit_latency are going longer in deeper idle state, no needs to waste some cpu cycle on useless seeking. Signed-off-by: Alex Shi To: linux-kernel@vger.kernel.org Cc: Daniel Lezcano Cc: Rasmus Villemoes Cc: Alex Shi Cc: Arjan van de Ven Cc: Rik van Riel Cc: "Rafael J. Wysocki" --- drivers/cpuidle/governors/menu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c index 03d38c2..bb58e2a 100644 --- a/drivers/cpuidle/governors/menu.c +++ b/drivers/cpuidle/governors/menu.c @@ -358,9 +358,9 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev) if (s->disabled || su->disable) continue; if (s->target_residency > data->predicted_us) - continue; + break; if (s->exit_latency > latency_req) - continue; + break; data->last_state_idx = i; } -- 2.8.1.101.g72d917a