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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 F1CCBC4338F for ; Wed, 4 Aug 2021 13:11:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D198C60F41 for ; Wed, 4 Aug 2021 13:11:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237188AbhHDNLy (ORCPT ); Wed, 4 Aug 2021 09:11:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36856 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233389AbhHDNLw (ORCPT ); Wed, 4 Aug 2021 09:11:52 -0400 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BA59EC0613D5 for ; Wed, 4 Aug 2021 06:11:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=P4X735DYiIfygJN7+etEPu5hzo8NS8lKB4wnq177LMk=; b=TQs+i5fFfikvR+hLPNq/z7XyKq INKTZTlUvHnGuHRZduJYHWmZpZXaK9L2hQMInbbQcEVUAULfLU3KVlgCBC/e+4dSj9c2KgcSUPScB boWpVRktuT0N8Q5ZuPgy28rs2lEUbi3eTIyDO/U1GxkB9ywuKn8mCg4kqD4K+sbtvEvBQtu12gZc4 qhrWWe5eNprqFTo+t1hQvcPQ9dD4rrmtQyj5oABDJR8UWSEYms0V9OrYDk60w3WheCbHEnubXyqSP q0BG+gU34QmY4fheCobDs3p61EUY0y5Q20KsuuqhWKpqIcJRghWzkvDGeITyqz5uJyGpBGStOmTWR ML6FDPjw==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=worktop.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mBGgE-005kTn-PQ; Wed, 04 Aug 2021 13:11:31 +0000 Received: by worktop.programming.kicks-ass.net (Postfix, from userid 1000) id 0BAE09862B0; Wed, 4 Aug 2021 15:11:30 +0200 (CEST) Date: Wed, 4 Aug 2021 15:11:29 +0200 From: Peter Zijlstra To: Mel Gorman Cc: Ingo Molnar , Vincent Guittot , Valentin Schneider , Song Bao Hua , LKML Subject: Re: [PATCH 0/2] Reduce SIS scanning Message-ID: <20210804131129.GF8057@worktop.programming.kicks-ass.net> References: <20210804115857.6253-1-mgorman@techsingularity.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210804115857.6253-1-mgorman@techsingularity.net> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Aug 04, 2021 at 12:58:55PM +0100, Mel Gorman wrote: > 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. Thanks!