Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757627AbbLBSmI (ORCPT ); Wed, 2 Dec 2015 13:42:08 -0500 Received: from g1t6214.austin.hp.com ([15.73.96.122]:47014 "EHLO g1t6214.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756452AbbLBSmG (ORCPT ); Wed, 2 Dec 2015 13:42:06 -0500 From: Waiman Long To: Ingo Molnar , Peter Zijlstra Cc: linux-kernel@vger.kernel.org, Yuyang Du , Paul Turner , Ben Segall , Morten Rasmussen , Scott J Norton , Douglas Hatch , Waiman Long Subject: [PATCH v2 0/3] sched/fair: Reduce contention on tg's load_avg Date: Wed, 2 Dec 2015 13:41:47 -0500 Message-Id: <1449081710-20185-1-git-send-email-Waiman.Long@hpe.com> X-Mailer: git-send-email 1.7.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1111 Lines: 26 v1->v2: - Make a memcache for task_group to make sure that the allocated task_group object will always be on cacheline boundary even if debugging is turned on. - Scrap the original patch 3 and replace it with another one to disable load_avg update for root_task_group. This patch series tries to reduce contention on task_group's load_avg to improve system performance. It also tries to optimize the use of idle_cpu() call in update_sg_lb_stats(). Waiman Long (3): sched/fair: Avoid redundant idle_cpu() call in update_sg_lb_stats() sched/fair: Move hot load_avg into its own cacheline sched/fair: Disable tg load_avg update for root_task_group kernel/sched/core.c | 36 ++++++++++++++++++++++++++++++++++-- kernel/sched/fair.c | 16 +++++++++++++--- kernel/sched/sched.h | 7 ++++++- 3 files changed, 53 insertions(+), 6 deletions(-) -- 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/