Received: by 2002:a25:ad19:0:0:0:0:0 with SMTP id y25csp637692ybi; Fri, 12 Jul 2019 02:12:09 -0700 (PDT) X-Google-Smtp-Source: APXvYqwxRY7nsPIwPMCyBrpjSmvce0NPeft1ChO0xeYC541VQePaU0TdxWuCZx6NOq4jHl44Zp3y X-Received: by 2002:a17:90b:8d8:: with SMTP id ds24mr10234767pjb.135.1562922729238; Fri, 12 Jul 2019 02:12:09 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1562922729; cv=none; d=google.com; s=arc-20160816; b=qLJwmklWYUVohK/GvjgmRVuY0eAXCpF2101yLAJpLgsSYLbCFbqQAluIOIMpQVGI4h JMCwHW9J1Uir/J/rB4EvEqU6sD+66uJEmaHxdpjqDVEGhlhcrfTe56cE6Z45/PiAblNO 2jZ/Z6Dc5nwoNZYiLVbp/lw18wrEoMcXLizwwTS6gTsZGDLY9+EFmz26iIv5yqEmz10k xPHQIrtwtOz7dhssnR9n66MtBvHwtwzAqhpagd8ywbdWR9qtVRyOj7K2S33VYpSTlztL 3Ixj8ZoMYvbikR7qYOQb7b7VZ6JhYVvVExfkLCJx+83Mn5n3ItTd4XgdXxJbIXJJST+2 h6Vw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:from:references:cc:to:subject; bh=jcceaML/n0gsbJdlAi/GRuCQT0aw8Kc8cBnjHGwhfgQ=; b=dRqxLfmlpX54WwIpOxvcapQ3BESeQ14ScF68Lrhmhs6Ew/eJNz3sPhMuM0cLCNl/w9 eBdOmqETv9u491pFMP1z1N/eWbauC8Ob9i2P2RnVEOO5DGdQRaaORICGvoej8aG0yufp H41KJQ+BW2yTqCZwW39diNJn/6AvAg+ww75rb7+eqgu35u7zQhjIUEtnM1EUixsWrtM6 X5O7KO+tvQD+sL1giDf4T9A7cHJhJyMviZtXdLib59XLqKvk6PS8LnhPqLoxLvH5Qbha erhg1UN/9ds17qLbFnqCqjE0DzWneUEJbugIriTASLblxaM40PsAUQ3eQ1JPmSPGf1i4 nmZQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=alibaba.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id l71si7921292pgd.314.2019.07.12.02.11.53; Fri, 12 Jul 2019 02:12:09 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=alibaba.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726435AbfGLJLb (ORCPT + 99 others); Fri, 12 Jul 2019 05:11:31 -0400 Received: from out30-44.freemail.mail.aliyun.com ([115.124.30.44]:58282 "EHLO out30-44.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725989AbfGLJLa (ORCPT ); Fri, 12 Jul 2019 05:11:30 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R621e4;CH=green;DM=||false|;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e07417;MF=yun.wang@linux.alibaba.com;NM=1;PH=DS;RN=13;SR=0;TI=SMTPD_---0TWh00oy_1562922685; Received: from testdeMacBook-Pro.local(mailfrom:yun.wang@linux.alibaba.com fp:SMTPD_---0TWh00oy_1562922685) by smtp.aliyun-inc.com(127.0.0.1); Fri, 12 Jul 2019 17:11:25 +0800 Subject: Re: [PATCH 1/4] numa: introduce per-cgroup numa balancing locality, statistic To: Peter Zijlstra Cc: hannes@cmpxchg.org, mhocko@kernel.org, vdavydov.dev@gmail.com, Ingo Molnar , linux-kernel@vger.kernel.org, linux-mm@kvack.org, mcgrof@kernel.org, keescook@chromium.org, linux-fsdevel@vger.kernel.org, cgroups@vger.kernel.org, Mel Gorman , riel@surriel.com References: <209d247e-c1b2-3235-2722-dd7c1f896483@linux.alibaba.com> <60b59306-5e36-e587-9145-e90657daec41@linux.alibaba.com> <3ac9b43a-cc80-01be-0079-df008a71ce4b@linux.alibaba.com> <20190711134754.GD3402@hirez.programming.kicks-ass.net> <20190712075815.GN3402@hirez.programming.kicks-ass.net> From: =?UTF-8?B?546L6LSH?= Message-ID: <37474414-1a54-8e3a-60df-eb7e5e1cc1ed@linux.alibaba.com> Date: Fri, 12 Jul 2019 17:11:25 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: <20190712075815.GN3402@hirez.programming.kicks-ass.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2019/7/12 下午3:58, Peter Zijlstra wrote: [snip] >>> >>> Then our task t1 should be accounted to B (as you do), but also to A and >>> R. >> >> I get the point but not quite sure about this... >> >> Not like pages there are no hierarchical limitation on locality, also tasks > > You can use cpusets to affect that. Could you please give more detail on this? > >> running in a particular group have no influence to others, not to mention the >> extra overhead, does it really meaningful to account the stuff hierarchically? > > AFAIU it's a requirement of cgroups to be hierarchical. All our other > cgroup accounting is like that. Ok, should respect the convention :-) Regards, Michael Wang >