Date: Tue, 10 Sep 2013 11:28:53 -0400 From: Julien Desfossez <[email protected]>
> > -----Message d'origine----- > > The live trace reading mechanism offers guarantees that the viewer can > > never be in a position where it has to assume that it can read the trace > > safely. > > ------------------------------ > > There are two risks when reading an active trace : reading a trace without > the complete metadata, and assuming a stream is inactive. > > If the viewer tries to read a trace for which it does not have the full > metadata (which is not known during normal tracing), it risks to crash > reading the trace. The live trace reading > feature prevents the viewer from getting trace packets if there is new > metadata appended between two packets read. > > Also, if a stream is inactive, usually the viewer would have to wait until it > is active again to continue processing the trace. The live trace reading > feature informs the viewer that it can > safely consider a stream inactive up to a certain point in time. That way, it > can continue to process the trace without waiting indefinitely for an > inactive stream. The live-timer > parameter, configured during the session creation by the user, defines the > sending rate of these inactivity beacons. > > I hope it clarifies the situation. > > Julien Then maybe what should have been said is: The live trace reading mechanism offers guarantees that the viewer can never be in a position where it cannot read the trace safely. Right? Daniel U. Thibault Protection des systèmes et contremesures (PSC) | Systems Protection & Countermeasures (SPC) Cyber sécurité pour les missions essentielles (CME) | Mission Critical Cyber Security (MCCS) R & D pour la défense Canada - Valcartier (RDDC Valcartier) | Defence R&D Canada - Valcartier (DRDC Valcartier) 2459 route de la Bravoure Québec QC G3J 1X5 CANADA Vox : (418) 844-4000 x4245 Fax : (418) 844-4538 NAC : 918V QSDJ <http://www.travelgis.com/map.asp?addr=918V%20QSDJ> Gouvernement du Canada | Government of Canada <http://www.valcartier.drdc-rddc.gc.ca/> _______________________________________________ lttng-dev mailing list [email protected] http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
