Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932955Ab3FQNCq (ORCPT ); Mon, 17 Jun 2013 09:02:46 -0400 Received: from na3sys009aog117.obsmtp.com ([74.125.149.242]:45119 "EHLO na3sys009aog117.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932731Ab3FQNCo (ORCPT ); Mon, 17 Jun 2013 09:02:44 -0400 From: Lei Wen To: Peter Zijlstra , Ingo Molnar , , , Subject: [PATCH 1/3] sched: reduce calculation effort in fix_small_imbalance Date: Mon, 17 Jun 2013 21:00:22 +0800 Message-ID: <1371474024-19787-2-git-send-email-leiwen@marvell.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1371474024-19787-1-git-send-email-leiwen@marvell.com> References: <1371474024-19787-1-git-send-email-leiwen@marvell.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1770 Lines: 50 Actually all below item could be repalced by scaled_busy_load_per_task (sds->busiest_load_per_task * SCHED_POWER_SCALE) /sds->busiest->sgp->power; Signed-off-by: Lei Wen --- kernel/sched/fair.c | 19 ++++++++----------- 1 file changed, 8 insertions(+), 11 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index c61a614..28052fa 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4727,20 +4727,17 @@ void fix_small_imbalance(struct lb_env *env, struct sd_lb_stats *sds) pwr_now /= SCHED_POWER_SCALE; /* Amount of load we'd subtract */ - tmp = (sds->busiest_load_per_task * SCHED_POWER_SCALE) / - sds->busiest->sgp->power; - if (sds->max_load > tmp) + if (sds->max_load > scaled_busy_load_per_task) { pwr_move += sds->busiest->sgp->power * - min(sds->busiest_load_per_task, sds->max_load - tmp); - - /* Amount of load we'd add */ - if (sds->max_load * sds->busiest->sgp->power < - sds->busiest_load_per_task * SCHED_POWER_SCALE) - tmp = (sds->max_load * sds->busiest->sgp->power) / - sds->this->sgp->power; - else + min(sds->busiest_load_per_task, + sds->max_load - scaled_busy_load_per_task); tmp = (sds->busiest_load_per_task * SCHED_POWER_SCALE) / sds->this->sgp->power; + } else + tmp = (sds->max_load * sds->busiest->sgp->power) / + sds->this->sgp->power; + + /* Amount of load we'd add */ pwr_move += sds->this->sgp->power * min(sds->this_load_per_task, sds->this_load + tmp); pwr_move /= SCHED_POWER_SCALE; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/