From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx109.postini.com [74.125.245.109]) by kanga.kvack.org (Postfix) with SMTP id 1C6A16B0073 for ; Fri, 6 Jul 2012 11:10:34 -0400 (EDT) Received: from /spool/local by e33.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 6 Jul 2012 09:10:31 -0600 Received: from d03relay05.boulder.ibm.com (d03relay05.boulder.ibm.com [9.17.195.107]) by d03dlp02.boulder.ibm.com (Postfix) with ESMTP id 22BB83E40049 for ; Fri, 6 Jul 2012 15:09:10 +0000 (WET) Received: from d03av06.boulder.ibm.com (d03av06.boulder.ibm.com [9.17.195.245]) by d03relay05.boulder.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q66F8oir101204 for ; Fri, 6 Jul 2012 09:08:53 -0600 Received: from d03av06.boulder.ibm.com (loopback [127.0.0.1]) by d03av06.boulder.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q66F8fD0024488 for ; Fri, 6 Jul 2012 09:08:41 -0600 Message-ID: <4FF6FF1F.5090701@linux.vnet.ibm.com> Date: Fri, 06 Jul 2012 10:07:11 -0500 From: Seth Jennings MIME-Version: 1.0 Subject: Re: [PATCH 0/4] zsmalloc improvements References: <1341263752-10210-1-git-send-email-sjenning@linux.vnet.ibm.com> <20120704204325.GB2924@localhost.localdomain> In-Reply-To: <20120704204325.GB2924@localhost.localdomain> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Konrad Rzeszutek Wilk Cc: Greg Kroah-Hartman , Andrew Morton , Dan Magenheimer , Konrad Rzeszutek Wilk , Nitin Gupta , Minchan Kim , Robert Jennings , linux-mm@kvack.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org On 07/04/2012 03:43 PM, Konrad Rzeszutek Wilk wrote: > On Mon, Jul 02, 2012 at 04:15:48PM -0500, Seth Jennings wrote: >> This exposed an interesting and unexpected result: in all >> cases that I tried, copying the objects that span pages instead >> of using the page table to map them, was _always_ faster. I could >> not find a case in which the page table mapping method was faster. > > Which architecture was this under? It sounds x86-ish? Is this on > Westmere and more modern machines? What about Core2 architecture? > > Oh how did it work on AMD Phenom boxes? I don't have a Phenom box but I have an Athlon X2 I can try out. I'll get this information next Monday. -- Seth -- 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 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757299Ab2GFPMc (ORCPT ); Fri, 6 Jul 2012 11:12:32 -0400 Received: from e34.co.us.ibm.com ([32.97.110.152]:60215 "EHLO e34.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750906Ab2GFPMa (ORCPT ); Fri, 6 Jul 2012 11:12:30 -0400 Message-ID: <4FF6FF1F.5090701@linux.vnet.ibm.com> Date: Fri, 06 Jul 2012 10:07:11 -0500 From: Seth Jennings User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120615 Thunderbird/13.0.1 MIME-Version: 1.0 To: Konrad Rzeszutek Wilk CC: Greg Kroah-Hartman , Andrew Morton , Dan Magenheimer , Konrad Rzeszutek Wilk , Nitin Gupta , Minchan Kim , Robert Jennings , linux-mm@kvack.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/4] zsmalloc improvements References: <1341263752-10210-1-git-send-email-sjenning@linux.vnet.ibm.com> <20120704204325.GB2924@localhost.localdomain> In-Reply-To: <20120704204325.GB2924@localhost.localdomain> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12070615-1780-0000-0000-0000072980D7 X-IBM-ISS-SpamDetectors: X-IBM-ISS-DetailInfo: BY=3.00000284; HX=3.00000191; KW=3.00000007; PH=3.00000001; SC=3.00000004; SDB=6.00154288; UDB=6.00034809; UTC=2012-07-06 15:12:28 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/04/2012 03:43 PM, Konrad Rzeszutek Wilk wrote: > On Mon, Jul 02, 2012 at 04:15:48PM -0500, Seth Jennings wrote: >> This exposed an interesting and unexpected result: in all >> cases that I tried, copying the objects that span pages instead >> of using the page table to map them, was _always_ faster. I could >> not find a case in which the page table mapping method was faster. > > Which architecture was this under? It sounds x86-ish? Is this on > Westmere and more modern machines? What about Core2 architecture? > > Oh how did it work on AMD Phenom boxes? I don't have a Phenom box but I have an Athlon X2 I can try out. I'll get this information next Monday. -- Seth