From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=41487 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OsevD-0000Fj-Ii for qemu-devel@nongnu.org; Mon, 06 Sep 2010 12:51:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OsevC-0004Df-8Q for qemu-devel@nongnu.org; Mon, 06 Sep 2010 12:51:55 -0400 Received: from mx1.redhat.com ([209.132.183.28]:16441) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OsevC-0004DM-2G for qemu-devel@nongnu.org; Mon, 06 Sep 2010 12:51:54 -0400 Date: Mon, 6 Sep 2010 17:51:47 +0100 From: "Daniel P. Berrange" Subject: Re: [Qemu-devel] [PATCH v3 00/14] trace: Add static tracing to QEMU Message-ID: <20100906165147.GL4777@redhat.com> References: <1283786051-29530-1-git-send-email-stefanha@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1283786051-29530-1-git-send-email-stefanha@linux.vnet.ibm.com> Reply-To: "Daniel P. Berrange" List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Stefan Hajnoczi Cc: Blue Swirl , Anthony Liguori , Prerna Saxena , qemu-devel@nongnu.org, "Michael S. Tsirkin" On Mon, Sep 06, 2010 at 04:13:57PM +0100, Stefan Hajnoczi wrote: > This patch series adds static tracing to QEMU. It can be used to instrument > QEMU code by means of lightweight logging called trace events. > > Prerna and I are now posting the entire patch series with a serious eye towards > checking we meet users' and developers' tracing needs and with the goal of > getting this functionality merged into qemu.git. The main question would be why create a tracing framework and probe markup macros specific to QEMU ? It looks like quite a few major open source projects (PostgreSQL, Python, TCL, OpenJDK) are using DTrace static probe markers for code instrumentation. IIUC this is accessible on Solaris, (Free/Net?)-BSD, OS-X and also Linux via SystemTAP's DTrace compat layer. Is this QEMU specific probe markup flexible enough to make it possible to also support DTrace/SystemTAP without having to add a second set of source code markers to every probe point ? Regards, Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://deltacloud.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|