From owner-freebsd-hackers@FreeBSD.ORG Sat Aug 13 17:39:16 2011 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 66D6B106564A for ; Sat, 13 Aug 2011 17:39:16 +0000 (UTC) (envelope-from joesuf4@gmail.com) Received: from mail-vw0-f54.google.com (mail-vw0-f54.google.com [209.85.212.54]) by mx1.freebsd.org (Postfix) with ESMTP id 2D4128FC0A for ; Sat, 13 Aug 2011 17:39:16 +0000 (UTC) Received: by vws18 with SMTP id 18so4196210vws.13 for ; Sat, 13 Aug 2011 10:39:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; bh=9jEmWLiGMkZwKSEvlwChzQaValVfYh1RV5z0Tc4y6Xg=; b=ksCukhptPzkWByYEsqNR+yOXFBHb2lRk0m1VWpQQwY5r3XYt+Sn7wK1nCpmqYxo7lj yCnpe1gdMw3cRSIti3RILd8hRI+aU7ubgtmbZtSgM0scduftQttWhmoaznRIXgZI9RKl 1l/f/xmF43+I6PpKxRjXXSisVUva4x0MEehLs= MIME-Version: 1.0 Received: by 10.52.28.79 with SMTP id z15mr2051397vdg.365.1313255764272; Sat, 13 Aug 2011 10:16:04 -0700 (PDT) Received: by 10.220.190.7 with HTTP; Sat, 13 Aug 2011 10:16:04 -0700 (PDT) Date: Sat, 13 Aug 2011 13:16:04 -0400 Message-ID: From: Joe Schaefer To: freebsd-hackers Content-Type: text/plain; charset=UTF-8 Subject: Clock stalls on Sabertooth 990FX X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 13 Aug 2011 17:39:16 -0000 Brand new machine with a Phenom II X6 1100T and under chronic load the clock will stop running periodically until the machine eventually completely freezes. Note: during these stalls the kernel is still running, the machine is still mostly responsive, it's just that the clock is frozen in time. I've disabled Turbo mode in the bios and toyed with just about every other setting but nothing seems to resolve this problem. Based on the behavior of the machine (just making buildworld will eventually kill it, upping the -j flag just kills it faster), I'm guessing it has something to do with the Digi+ VRM features but again nothing I've tried modifying in the bios seems to help. I've tried both 8.2-RELEASE and FreeBSD 9 (head). Running head now with a dtrace enabled kernel. Suggestions?