From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with ESMTP id 33EE160021B for ; Sun, 27 Dec 2009 07:47:45 -0500 (EST) Received: from d23relay05.au.ibm.com (d23relay05.au.ibm.com [202.81.31.247]) by e23smtp04.au.ibm.com (8.14.3/8.13.1) with ESMTP id nBRCiHDC026744 for ; Sun, 27 Dec 2009 23:44:17 +1100 Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay05.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id nBRChRth1118412 for ; Sun, 27 Dec 2009 23:43:27 +1100 Received: from d23av01.au.ibm.com (loopback [127.0.0.1]) by d23av01.au.ibm.com (8.14.3/8.13.1/NCO v10.0 AVout) with ESMTP id nBRClcIb006869 for ; Sun, 27 Dec 2009 23:47:38 +1100 Date: Sun, 27 Dec 2009 18:17:32 +0530 From: Balbir Singh Subject: Re: [PATCH v4 0/4] cgroup notifications API and memory thresholds Message-ID: <20091227124732.GA3601@balbir.in.ibm.com> Reply-To: balbir@linux.vnet.ibm.com References: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org To: "Kirill A. Shutemov" Cc: containers@lists.linux-foundation.org, linux-mm@kvack.org, Paul Menage , Li Zefan , Andrew Morton , KAMEZAWA Hiroyuki , Pavel Emelyanov , Dan Malek , Vladislav Buzov , Daisuke Nishimura , Alexander Shishkin , linux-kernel@vger.kernel.org List-ID: * Kirill A. Shutemov [2009-12-27 04:08:58]: > This patchset introduces eventfd-based API for notifications in cgroups and > implements memory notifications on top of it. > > It uses statistics in memory controler to track memory usage. > > Output of time(1) on building kernel on tmpfs: > > Root cgroup before changes: > make -j2 506.37 user 60.93s system 193% cpu 4:52.77 total > Non-root cgroup before changes: > make -j2 507.14 user 62.66s system 193% cpu 4:54.74 total > Root cgroup after changes (0 thresholds): > make -j2 507.13 user 62.20s system 193% cpu 4:53.55 total > Non-root cgroup after changes (0 thresholds): > make -j2 507.70 user 64.20s system 193% cpu 4:55.70 total > Root cgroup after changes (1 thresholds, never crossed): > make -j2 506.97 user 62.20s system 193% cpu 4:53.90 total > Non-root cgroup after changes (1 thresholds, never crossed): > make -j2 507.55 user 64.08s system 193% cpu 4:55.63 total > > Any comments? Thanks for adding the documentation, now on to more critical questions 1. Any reasons for not using cgroupstats? 2. Is there a user space test application to test this code. IIUC, I need to write a program that uses eventfd(2) and then passes the eventfd descriptor and thresold to cgroup.*event* file and then the program will get notified when the threshold is reached? -- Balbir -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org