From owner-freebsd-net@FreeBSD.ORG Sun May 11 08:57:27 2003 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7362637B401 for ; Sun, 11 May 2003 08:57:27 -0700 (PDT) Received: from server2.stileproject.com (server2-a.dragondata.com [64.202.112.25]) by mx1.FreeBSD.org (Postfix) with ESMTP id ABC7043FAF for ; Sun, 11 May 2003 08:57:26 -0700 (PDT) (envelope-from toasty@dragondata.com) Received: from KEVIN-AW.dragondata.com (localhost [127.0.0.1]) h4BFvwUE002501; Sun, 11 May 2003 10:57:58 -0500 (CDT) (envelope-from toasty@dragondata.com) Message-Id: <5.2.0.9.2.20030511105600.037dfec8@127.0.0.1> X-Sender: toasty@127.0.0.1 X-Mailer: QUALCOMM Windows Eudora Version 5.2.0.9 Date: Sun, 11 May 2003 10:57:25 -0500 To: Don Bowman From: Kevin Day In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed X-Virus-Scanned: by amavisd-new cc: freebsd-net@freebsd.org Subject: RE: polling(4) and idle time/cpu usage percentages X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 11 May 2003 15:57:27 -0000 At 10:44 AM 5/11/2003, you wrote: >I tried the hack, as below. The other thing that makes idle >wildly inaccurate is the symmetric multi-threading on the xeon >(aka hyperthreading). Smack me if I'm wrong, but you can't compile the kernel with DEVICE_POLLING active at the same time as SMP. Without SMP you don't get any of the advantages/effects of HTT. (or has polling been made to play nice with SMP in -current?) -- Kevin