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Fri, 3 Jul 2020 11:27:33 +0000 (UTC) Date: Fri, 3 Jul 2020 12:27:30 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Christophe de Dinechin Subject: Re: [PATCH v2 0/3] trace: Add a trace backend for the recorder library Message-ID: <20200703112730.GD2213227@redhat.com> References: <20200626162706.3304357-1-dinechin@redhat.com> <20200630125916.GG91444@stefanha-x1.localdomain> MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/1.14.3 (2020-06-14) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=berrange@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Received-SPF: pass client-ip=205.139.110.61; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/03 03:17:33 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Cc: qemu-devel@nongnu.org, Michael Tokarev , Markus Armbruster , "Dr. David Alan Gilbert" , Stefan Hajnoczi , Laurent Vivier Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Fri, Jul 03, 2020 at 12:37:02PM +0200, Christophe de Dinechin wrote: > > On 2020-06-30 at 14:59 CEST, Stefan Hajnoczi wrote... > > On Fri, Jun 26, 2020 at 06:27:03PM +0200, Christophe de Dinechin wrote: > >> The recorder library implements low-cost always-on tracing, with three > >> usage models: > >> > >> 1. Flight recorder: Dump information on recent events in case of crash > >> 2. Tracing: Individual traces can be enabled using environment variables > >> 3. Real-time graphing / control, using the recorder_scope application > >> > >> This short series introduces a new "recorder" back-end which connects > >> to the recorder. Traces using the recorder are intentionally "always on". > >> An example is given of how the recorder can also be used separately > >> from generated traces. This can be useful if you want to enable > >> multiple related traces for a particular topic. > >> > >> This series requires a small makefile fix submitted earlier, included > >> here for convenience. > >> > >> Christophe de Dinechin (3): > >> Makefile: Compute libraries for libqemuutil.a and libvhost-user.a > >> trace: Add support for recorder back-end > >> trace: Example of "centralized" recorder tracing > > > > Please add a build to .travis.yml that enables recorder. That way we'll > > catch build failures. > > There is no recorder package in Xenial. Our .gitlab-ci.yml is going to start using the containers built from tests/docker/dockerfiles. So if you add the package to the dockerfiles that support it we can get coverage that way. I presume it'll need the .gitlab-ci.yml modified to add the extra configure arg too. Regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|