From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 17 Sep 2002 17:27:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 17 Sep 2002 17:27:18 -0400 Received: from packet.digeo.com ([12.110.80.53]:38870 "EHLO packet.digeo.com") by vger.kernel.org with ESMTP id ; Tue, 17 Sep 2002 17:27:17 -0400 Message-ID: <3D879F59.6BDF9443@digeo.com> Date: Tue, 17 Sep 2002 14:32:09 -0700 From: Andrew Morton X-Mailer: Mozilla 4.79 [en] (X11; U; Linux 2.4.19-pre4 i686) X-Accept-Language: en MIME-Version: 1.0 To: "David S. Miller" CC: manfred@colorfullife.com, linux-netdev@oss.sgi.com, linux-kernel@vger.kernel.org Subject: Re: Info: NAPI performance at "low" loads References: <3D87881F.4070808@colorfullife.com> <20020917.135939.52477700.davem@redhat.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 17 Sep 2002 21:32:09.0195 (UTC) FILETIME=[AD6213B0:01C25E91] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org "David S. Miller" wrote: > > From: Manfred Spraul > Date: Tue, 17 Sep 2002 21:53:03 +0200 > > Receiver: > $ loadtest > > This appears to be x86 only, sorry I can't test this out for you as > all my boxes are sparc64. > > I was actually eager to try your tests out here. > > Do you really need to use x86 instructions to do what you > are doing? There are portable pthread mutexes available. There is a similar background loadtester at http://www.zip.com.au/~akpm/linux/#zc . It's fairly fancy - I wrote it for measuring networking efficiency. It doesn't seem to have any PCisms.... (I measured similar regression using an ancient NAPIfied 3c59x a long time ago).