From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753203Ab2DBQe5 (ORCPT ); Mon, 2 Apr 2012 12:34:57 -0400 Received: from mail-yw0-f46.google.com ([209.85.213.46]:52624 "EHLO mail-yw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752361Ab2DBQe4 (ORCPT ); Mon, 2 Apr 2012 12:34:56 -0400 MIME-Version: 1.0 In-Reply-To: <4F69022D.3080300@redhat.com> References: <20120316144028.036474157@chello.nl> <4F670325.7080700@redhat.com> <1332155527.18960.292.camel@twins> <20120319130401.GI24602@redhat.com> <1332163591.18960.334.camel@twins> <20120319135745.GL24602@redhat.com> <4F673D73.90106@redhat.com> <20120319143002.GQ24602@redhat.com> <1332182523.18960.372.camel@twins> <4F69022D.3080300@redhat.com> Date: Mon, 2 Apr 2012 19:34:54 +0300 X-Google-Sender-Auth: zjawQxUioVN8e9wGKA3KF2yd0ls Message-ID: Subject: Re: [RFC][PATCH 00/26] sched/numa From: Pekka Enberg To: Rik van Riel Cc: Peter Zijlstra , Andrea Arcangeli , Avi Kivity , Linus Torvalds , Andrew Morton , Thomas Gleixner , Ingo Molnar , Paul Turner , Suresh Siddha , Mike Galbraith , "Paul E. McKenney" , Lai Jiangshan , Dan Smith , Bharata B Rao , Lee Schermerhorn , Johannes Weiner , linux-kernel@vger.kernel.org, linux-mm@kvack.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 21, 2012 at 12:18 AM, Rik van Riel wrote: > I suspect Java and other runtimes may have issues where > they simply do not know which thread will end up using > which objects from the heap heavily. What kind of JVM workloads are you thinking of? Modern GCs use thread-local allocation for performance reasons so I'd assume that most of accesses are on local node. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx207.postini.com [74.125.245.207]) by kanga.kvack.org (Postfix) with SMTP id 1256D6B0044 for ; Mon, 2 Apr 2012 12:34:56 -0400 (EDT) Received: by iajr24 with SMTP id r24so5821448iaj.14 for ; Mon, 02 Apr 2012 09:34:55 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <4F69022D.3080300@redhat.com> References: <20120316144028.036474157@chello.nl> <4F670325.7080700@redhat.com> <1332155527.18960.292.camel@twins> <20120319130401.GI24602@redhat.com> <1332163591.18960.334.camel@twins> <20120319135745.GL24602@redhat.com> <4F673D73.90106@redhat.com> <20120319143002.GQ24602@redhat.com> <1332182523.18960.372.camel@twins> <4F69022D.3080300@redhat.com> Date: Mon, 2 Apr 2012 19:34:54 +0300 Message-ID: Subject: Re: [RFC][PATCH 00/26] sched/numa From: Pekka Enberg Content-Type: text/plain; charset=ISO-8859-1 Sender: owner-linux-mm@kvack.org List-ID: To: Rik van Riel Cc: Peter Zijlstra , Andrea Arcangeli , Avi Kivity , Linus Torvalds , Andrew Morton , Thomas Gleixner , Ingo Molnar , Paul Turner , Suresh Siddha , Mike Galbraith , "Paul E. McKenney" , Lai Jiangshan , Dan Smith , Bharata B Rao , Lee Schermerhorn , Johannes Weiner , linux-kernel@vger.kernel.org, linux-mm@kvack.org On Wed, Mar 21, 2012 at 12:18 AM, Rik van Riel wrote: > I suspect Java and other runtimes may have issues where > they simply do not know which thread will end up using > which objects from the heap heavily. What kind of JVM workloads are you thinking of? Modern GCs use thread-local allocation for performance reasons so I'd assume that most of accesses are on local node. -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org