From owner-freebsd-current@FreeBSD.ORG Wed Feb 23 13:22:37 2005 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9388B16A4CE for ; Wed, 23 Feb 2005 13:22:37 +0000 (GMT) Received: from cyrus.watson.org (cyrus.watson.org [204.156.12.53]) by mx1.FreeBSD.org (Postfix) with ESMTP id 394E343D46 for ; Wed, 23 Feb 2005 13:22:37 +0000 (GMT) (envelope-from robert@fledge.watson.org) Received: from fledge.watson.org (fledge.watson.org [204.156.12.50]) by cyrus.watson.org (Postfix) with SMTP id 8C2DA46B8F for ; Wed, 23 Feb 2005 08:22:36 -0500 (EST) Date: Wed, 23 Feb 2005 13:20:55 +0000 (GMT) From: Robert Watson X-Sender: robert@fledge.watson.org To: current@FreeBSD.org Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Subject: Kernel profiling on a dual xeon with HTT leads to wedge? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 23 Feb 2005 13:22:37 -0000 I tried to turn on high precision kernel profiling on a dual Xeon box with HTT (so four logical processors) at work today. Unfortunately, whenever I do so, it seems to wedge hard within a few seconds. I can typically hit enter on the serial console maybe 4-6 times before it hangs pretty solidly (serial break doesn't work). I don't remember having this problem before, but when I backed the kernel out fo Feb 7, Jan 1, Dec 1, and Nov 1 the problem remained. I'm wondering if maybe I had HTT off on the box previously, but can't turn it off remotely currently so can't try that now. Does anyone else have kernel profilng working with >2 physical/logical processors? Robert N M Watson