Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 1 Oct 2002 19:32:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 1 Oct 2002 19:32:33 -0400 Received: from bitmover.com ([192.132.92.2]:63702 "EHLO mail.bitmover.com") by vger.kernel.org with ESMTP id ; Tue, 1 Oct 2002 19:32:33 -0400 Date: Tue, 1 Oct 2002 16:37:57 -0700 From: Larry McVoy To: "David S. Miller" Cc: mau@oscar.prima.de, linux-kernel@vger.kernel.org Subject: Re: LMbench results for 2.5.40 Message-ID: <20021001163757.J13270@work.bitmover.com> Mail-Followup-To: Larry McVoy , "David S. Miller" , mau@oscar.prima.de, linux-kernel@vger.kernel.org References: <20021001220853.GA20022@oscar.dorf.de> <20021001.161554.66190770.davem@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <20021001.161554.66190770.davem@redhat.com>; from davem@redhat.com on Tue, Oct 01, 2002 at 04:15:54PM -0700 X-MailScanner: Found to be clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 998 Lines: 22 > From: Patrick Mau > Date: Wed, 2 Oct 2002 00:08:54 +0200 > > Could someone explain the results I marked with '???' ? > The ones under 'Local Communication Bandwidth'. By the way, the place you will probably see variance in LMbench is in the context switch benchmarks, it's almost certainly due to randomness in cache layout and there isn't a thing we can do about it. You can run a zillion runs to get an average but please realize that is an *average*. The context switch number are accurate, the low ones represent no cache collisions and the high ones represent lots of cache collisions. FYI. I don't like it either. -- --- Larry McVoy lm at bitmover.com http://www.bitmover.com/lm - 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/