Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 23 Aug 2002 19:10:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 23 Aug 2002 19:10:27 -0400 Received: from e31.co.us.ibm.com ([32.97.110.129]:1997 "EHLO e31.co.us.ibm.com") by vger.kernel.org with ESMTP id ; Fri, 23 Aug 2002 19:10:27 -0400 Subject: Re: [Lse-tech] Re: (RFC): SKB Initialization To: nevdull@beaverton.ibm.com Cc: "Bill Hartner" , haveblue@us.ibm.com, linux-kernel@vger.kernel.org, lse-tech@lists.sourceforge.net X-Mailer: Lotus Notes Release 5.0.7 March 21, 2001 Message-ID: From: "Mala Anand" Date: Fri, 23 Aug 2002 18:14:26 -0500 X-MIMETrack: Serialize by Router on D03NM123/03/M/IBM(Release 5.0.10 |March 22, 2002) at 08/23/2002 05:14:26 PM MIME-Version: 1.0 Content-type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1496 Lines: 46 Rick wrote.. >Note that Mala said "I measured the cycles for only the >initialization code in alloc_skb and __kfree_skb" which could mean that >even other parts of alloc_skb() or __kfree_skb() may have gotten worse >and you would not have known. Please look at my reply to Ben LeHaise which has the cycles for alloc_skb() and __kfree_skb(). You don't have to guess that. > Later she admits, "As the scope of the >code measured widens the percentage improvement comes down" and finally >observes "We measured it in a web serving workload and found that we >get 0.7% improvement" which is practically in the noise. That was initial results which had more than the posted patch. We are still working on getting numbers. >Dave's >observation was that it was slightly worse (0.35%). Are you basing this 0.35% degradation on your profile. According to Dave's SPECweb99 results there is a 2.97% improvement in simultaneous connections with my patch. Is that right Dave? Regards, Mala Mala Anand IBM Linux Technology Center - Kernel Performance E-mail:manand@us.ibm.com http://www-124.ibm.com/developerworks/opensource/linuxperf http://www-124.ibm.com/developerworks/projects/linuxperf Phone:838-8088; Tie-line:678-8088 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/