From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B46A3C4338F for ; Wed, 4 Aug 2021 11:59:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8F46660F41 for ; Wed, 4 Aug 2021 11:59:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236943AbhHDL7Z (ORCPT ); Wed, 4 Aug 2021 07:59:25 -0400 Received: from outbound-smtp20.blacknight.com ([46.22.139.247]:44079 "EHLO outbound-smtp20.blacknight.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234555AbhHDL7W (ORCPT ); Wed, 4 Aug 2021 07:59:22 -0400 Received: from mail.blacknight.com (pemlinmail02.blacknight.ie [81.17.254.11]) by outbound-smtp20.blacknight.com (Postfix) with ESMTPS id B43761C3CC2 for ; Wed, 4 Aug 2021 12:59:08 +0100 (IST) Received: (qmail 29371 invoked from network); 4 Aug 2021 11:59:08 -0000 Received: from unknown (HELO stampy.112glenside.lan) (mgorman@techsingularity.net@[84.203.17.255]) by 81.17.254.9 with ESMTPA; 4 Aug 2021 11:59:08 -0000 From: Mel Gorman To: Ingo Molnar Cc: Peter Zijlstra , Vincent Guittot , Valentin Schneider , Song Bao Hua , LKML , Mel Gorman Subject: [PATCH 0/2] Reduce SIS scanning Date: Wed, 4 Aug 2021 12:58:55 +0100 Message-Id: <20210804115857.6253-1-mgorman@techsingularity.net> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is the first two patches from "Modify and/or delete SIS_PROP" and focues on improving the hit rate for recent_used_cpu and avoids rescanning the target CPU when it's known to be busy. These are relatively simply patches in comparison to the full series which could be a regression magnet and that series had at least one mistake in it. In general, the usual suspects showed mostly small gains with a few exceptions. Usual suspects were NAS, hackbench, schbench (Facebook latency-sensitive workload), perf pipe, kernel building, git test suite, dbench and redis. >From here, the next obvious candidates are either improving has_idle_cores or continuing to try remove/improve SIS_PROP. kernel/sched/fair.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) -- 2.31.1