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 486F4C48BE8 for ; Tue, 15 Jun 2021 20:43:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2ABB0613B1 for ; Tue, 15 Jun 2021 20:43:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231290AbhFOUqA (ORCPT ); Tue, 15 Jun 2021 16:46:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40008 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229931AbhFOUp4 (ORCPT ); Tue, 15 Jun 2021 16:45:56 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C2A51C061574 for ; Tue, 15 Jun 2021 13:43:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; 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=a904s9c4hVdONd2ZZ/pZ6JoSVL0uZx+id5frjGcZJtw=; b=UZ8KQonxSeKlYXD6/d1z3jy4nd uJDGzta3JHAtrZnsZi7EjJLIGmmEnAV52s79VMYp1EaCLkXPgg5xYagJ/4CrwdtEIEFnvr9auNznW TIwS/kapMt2r5Xjaekw/digYAkXhhWpX0d3rbYQJQNInM2lVgF0hBGU3uSMO4kqdepsNgAocvSXl+ ubU+cSlIeZkspPDGOkKTA7MyCRDbVzSWFrX1OH+xbs23xZPctQPZKfpLsBxe9sPnT+NVGS13xdggm sbLMyS+4RJqyS1Jr1/JgdOU9xk4tOHPMPHdQIsEJYmv8eeCDBow17fEETUPRhWCvAELkNa3OECSAw bK8zNDbA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=worktop.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1ltFtG-007Ea0-1a; Tue, 15 Jun 2021 20:42:43 +0000 Received: by worktop.programming.kicks-ass.net (Postfix, from userid 1000) id 917A79863C9; Tue, 15 Jun 2021 22:42:28 +0200 (CEST) Date: Tue, 15 Jun 2021 22:42:28 +0200 From: Peter Zijlstra To: Mel Gorman Cc: Ingo Molnar , Juri Lelli , Vincent Guittot , Valentin Schneider , LKML Subject: Re: [PATCH v2] sched/fair: Age the average idle time Message-ID: <20210615204228.GB4272@worktop.programming.kicks-ass.net> References: <20210615111611.GH30378@techsingularity.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210615111611.GH30378@techsingularity.net> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jun 15, 2021 at 12:16:11PM +0100, Mel Gorman wrote: > From: Peter Zijlstra (Intel) > > This is a partial forward-port of Peter Ziljstra's work first posted > at https://lore.kernel.org/lkml/20180530142236.667774973@infradead.org/. It's patches 2 and 3 together, right? > His Signed-off has been removed because it is modified but will be restored > if he says it's still ok. I suppose the SoB will auto-magically re-appear if I apply it :-) > The patch potentially matters when a socket was multiple LLCs as the > maximum search depth is lower. However, some of the test results were > suspiciously good (e.g. specjbb2005 gaining 50% on a Zen1 machine) and > other results were not dramatically different to other mcahines. > > Given the nature of the patch, Peter's full series is not being forward > ported as each part should stand on its own. Preferably they would be > merged at different times to reduce the risk of false bisections. I'm tempted to give it a go.. anyone object?