From owner-freebsd-current@FreeBSD.ORG Tue Jul 20 03:31:56 2010 Return-Path: Delivered-To: freebsd-current@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 51584106566B for ; Tue, 20 Jul 2010 03:31:56 +0000 (UTC) (envelope-from dan@dan.emsphone.com) Received: from email1.allantgroup.com (email1.emsphone.com [199.67.51.115]) by mx1.freebsd.org (Postfix) with ESMTP id 0D6A48FC15 for ; Tue, 20 Jul 2010 03:31:55 +0000 (UTC) Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101]) by email1.allantgroup.com (8.14.0/8.14.0) with ESMTP id o6K3VtqI078945 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 19 Jul 2010 22:31:55 -0500 (CDT) (envelope-from dan@dan.emsphone.com) Received: from dan.emsphone.com (smmsp@localhost [127.0.0.1]) by dan.emsphone.com (8.14.4/8.14.4) with ESMTP id o6K3Vs41094292 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 19 Jul 2010 22:31:55 -0500 (CDT) (envelope-from dan@dan.emsphone.com) Received: (from dan@localhost) by dan.emsphone.com (8.14.4/8.14.3/Submit) id o6K3Pjcr078879; Mon, 19 Jul 2010 22:25:45 -0500 (CDT) (envelope-from dan) Date: Mon, 19 Jul 2010 22:25:45 -0500 From: Dan Nelson To: Doug Barton Message-ID: <20100720032545.GM5485@dan.emsphone.com> References: <20100717192128.GM2381@deviant.kiev.zoral.com.ua> <20100718103003.GO2381@deviant.kiev.zoral.com.ua> <4C43541C.3060101@FreeBSD.org> <20100718194109.GU2381@deviant.kiev.zoral.com.ua> <4C435CBE.50500@FreeBSD.org> <20100718202338.GI5485@dan.emsphone.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-OS: FreeBSD 8.1-PRERELEASE User-Agent: Mutt/1.5.20 (2009-06-14) X-Virus-Scanned: clamav-milter 0.96 at email1.allantgroup.com X-Virus-Status: Clean X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-2.0.2 (email1.allantgroup.com [199.67.51.78]); Mon, 19 Jul 2010 22:31:55 -0500 (CDT) X-Scanned-By: MIMEDefang 2.45 Cc: Kostik Belousov , freebsd-current@FreeBSD.org, Rui Paulo Subject: Re: Why is intr taking up so much cpu? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 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: Tue, 20 Jul 2010 03:31:56 -0000 In the last episode (Jul 19), Doug Barton said: > I added options KDTRACE_HOOKS to my kernel config, built a new kernel, and > rebooted. I decided to try your script before things went sideways so I'd > have an idea of what to expect, and it didn't work: > > dtrace: failed to initialize dtrace: DTrace device not available on system > > Is there something else I need to do to enable it? I think you also need WITH_CTF=yes , either in your kernel config or directly on the make commandline. The kernel config option should work, but if it doesn't, it's guaranteed to work on the commandline. http://wiki.freebsd.org/DTrace http://lists.freebsd.org/pipermail/freebsd-current/2010-April/016620.html -- Dan Nelson dnelson@allantgroup.com