From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752041AbWFWUm1 (ORCPT ); Fri, 23 Jun 2006 16:42:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752042AbWFWUm1 (ORCPT ); Fri, 23 Jun 2006 16:42:27 -0400 Received: from web33315.mail.mud.yahoo.com ([68.142.206.130]:25708 "HELO web33315.mail.mud.yahoo.com") by vger.kernel.org with SMTP id S1752041AbWFWUm0 (ORCPT ); Fri, 23 Jun 2006 16:42:26 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:Received:Date:From:Reply-To:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding; b=VuOvInhXm/cLMn+Kin/id5eOwapkimPYneNaniRmgLNcNKF50+7Xl4AzZJK0Rvcwkw0nsyCIrbfr+vlmLLR6MfKg5xkDoKsPxWzM7sNKFxKvmdd+bpWueWqA7CkINCwVZ+Sy+5GTxLjto6Ty0cl7J6JXNVESnv/dIO7F7kmSvMM= ; Message-ID: <20060623204226.91945.qmail@web33315.mail.mud.yahoo.com> Date: Fri, 23 Jun 2006 13:42:26 -0700 (PDT) From: Danial Thom Reply-To: danial_thom@yahoo.com Subject: Re: Measuring tools - top and interrupts To: Erik Mouw Cc: linux-kernel@vger.kernel.org In-Reply-To: <20060622173128.GD14682@harddisk-recovery.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > Network traffic is usually IO bound, not CPU > bound. The load figures > top shows tell something about the amount of > work the CPU has to do, > not about how busy your PCI bus (or whatever > bus the NIC lives on) is. > > IIRC the networking layer in 2.6 differs quite > a lot from 2.4, so the > load average figures can be quite misleading. > For the record, *most* of the work are I/O calls (ie reading and writing registers), which are not in the "background". I/O calls become more and more expensive as the bus becomes saturated as it takes longer to get the bus to do the operation. DT __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com