From owner-freebsd-stable@FreeBSD.ORG Mon Sep 17 20:53:55 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id A6513106564A for ; Mon, 17 Sep 2012 20:53:55 +0000 (UTC) (envelope-from mattblists@icritical.com) Received: from mail3.icritical.com (mail3.icritical.com [212.57.248.143]) by mx1.freebsd.org (Postfix) with SMTP id E42358FC15 for ; Mon, 17 Sep 2012 20:53:54 +0000 (UTC) Received: (qmail 15372 invoked from network); 17 Sep 2012 06:50:35 -0000 Received: from localhost (127.0.0.1) by mail3.icritical.com with SMTP; 17 Sep 2012 06:50:35 -0000 Received: (qmail 15363 invoked by uid 599); 17 Sep 2012 06:50:34 -0000 Received: from unknown (HELO PDC002.icritical.int) (212.57.254.146) by mail3.icritical.com (qpsmtpd/0.28) with ESMTP; Mon, 17 Sep 2012 07:50:34 +0100 Message-ID: <5056C838.6050005@icritical.com> Date: Mon, 17 Sep 2012 07:50:32 +0100 From: Matt Burke User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:15.0) Gecko/20120906 Thunderbird/15.0 MIME-Version: 1.0 To: References: <503E129B.7070607@icritical.com> <20120913170452.GF5302@isuckatdomains.isuckatdomains.net> In-Reply-To: <20120913170452.GF5302@isuckatdomains.isuckatdomains.net> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit X-TLS-Incoming: YES X-Virus-Scanned: by iCritical at mail3.icritical.com Subject: Re: Userland dtrace broken? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 Sep 2012 20:53:55 -0000 On 09/13/12 18:04, Chris Nehren wrote: > Relevant to my interests, too. I've followed the instructions on the > wiki / in the handbook (on 9.0/9.1-PRE) and only receive error messages. > Is DTrace supposed to be working properly on 9.x, or is it still > experimental? >From my experience, as long as you avoid using the pid provider, and don't bother trying to get fbt:::return arguments, then it works reliably. I haven't tried userland static probes though. Tracing userland works *occasionally* (I find maybe ~20% of the time when it's the first command run on a machine with <1m uptime), but you're more likely to get strange results, or just a panic. -- The information contained in this message is confidential and intended for the addressee only. If you have received this message in error, or there are any problems with its content, please contact the sender. iCritical is a trading name of Critical Software Ltd. Registered in England: 04909220. Registered Office: IC2, Keele Science Park, Keele, Staffordshire, ST5 5NH. This message has been scanned for security threats by iCritical. www.icritical.com