[lttng-dev] Is LTTng self-conscious?

[Thibault, Daniel]

   Specifically, if LTTng is tracing all system calls on a machine and saving the trace locally, does it capture its own system calls (like disc access)? If it does, wouldn't this lead to unending echoes? Example: a disc access occurs, and the system call event is captured to the circular event buffer. After a short while, the consumer daemon writes the buffer contents to disc, which causes a system call event to be captured to the circular event buffer, and so on ad infinitam?

   If LTTng is self-conscious and avoids tracing itself, exactly what does it omit?

Daniel U. Thibault, M.Sc.²

Informaticien scientifique, CME-PSC, Centre de recherches de Valcartier
Recherche et développement pour la défense Canada / Gouvernement du Canada
daniel.thibault at drdc-rddc.gc.ca / Tél: 418-844-4000x4245 Téléc: 418-844-4538
daniel.thibault at forces.gc.ca / Tél: 418-844-4000x4245 Téléc: 418-844-4538

Computer Scientist, MCCS-SPC, Valcartier Research Centre 
Defence Research and Development Canada / Government of Canada
daniel.thibault at drdc-rddc.gc.ca / Tel: 418-844-4000x4245 Fax: 418-844-4538
daniel.thibault at forces.gc.ca / Tel: 418-844-4000x4245 Fax: 418-844-4538

DRDC is an agency of the Department of National Defence / RDDC est une agence du ministère de la Défense nationale