Hi Daniel, TRACEPOINT_EVENT_CLASS + TRACEPOINT_EVENT_INSTANCE work.
Thanks. The documentation is in include/lttng/ust-tracepoint-event.h (lttng-ust) and the last change was made in 2011: 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 63) /* 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 64) * TRACEPOINT_EVENT_CLASS declares a class of tracepoints receiving the 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 65) * same arguments and having the same field layout. 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 66) * 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 67) * TRACEPOINT_EVENT_INSTANCE declares an instance of a tracepoint, with 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 68) * its own provider and name. It refers to a class (template). 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 69) * 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 70) * TRACEPOINT_EVENT declared both a class and an instance and does a 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 71) * direct mapping from the instance to the class. 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 72) */ 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 73) 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 74) #undef TRACEPOINT_EVENT 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 75) #define TRACEPOINT_EVENT(_provider, _name, _args, _fields) \ 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 76) TRACEPOINT_EVENT_CLASS(_provider, _name, \ 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 77) _TP_PARAMS(_args), \ 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 78) _TP_PARAMS(_fields)) \ 1c324e59 (Mathieu Desnoyers 2011-11-18 12:36:52 -0500 79) TRACEPOINT_EVENT_INSTANCE(_provider, _name, _name, \ 68755429 (Mathieu Desnoyers 2012-03-01 14:39:02 -0500 80) _TP_PARAMS(_args)) Question: why is it required to give the the arguments to TRACEPOINT_EVENT_INSTANCE since all tracepoints from the same class use the same arguments and same field layout ? > ________________________________________ > From: Thibault, Daniel [daniel.thiba...@drdc-rddc.gc.ca] > Sent: Monday, October 20, 2014 8:29 AM > To: lttng-dev@lists.lttng.org > Cc: Boisvert, Sebastien > Subject: RE: [lttng-dev] Writing .tp files for lttng-gen-tp > ---------------------------------------------------------------------- > Date: Fri, 17 Oct 2014 21:39:21 +0000 > From: "Boisvert, Sebastien" <boisv...@anl.gov> > > I wrote a big .tp file to define numerous tracepoints that only differ in > > the event name. > > They all take the same arguments and they all dump the same fields. > > > > .tp file: > > https://github.com/sebhtml/biosal/blob/master/engine/thorium/tracepoints/lttng/message.tp > > > > Is there a more compact way of doing that ? > > > > Sébastien > ---------------------------------------------------------------------- > In the kernel domain, one can declare a "tracepoint class" with > DECLARE_EVENT_CLASS, and then use DEFINE_EVENT to instantiate the abstract > event class into individual trace events that share a single signature. > Surely the same can be done in user-space? > Looking at /usr/src/lttng-ust/include/lttng/tracepoint.h, we see there are > TRACEPOINT_EVENT_CLASS and TRACEPOINT_EVENT_INSTANCE macros right beside > TRACEPOINT_EVENT, so I suspect you could replace your message.tp with > something like: > [...] > TRACEPOINT_EVENT_CLASS( > thorium_message, > thorium_event_template, > TP_ARGS( > struct thorium_message *, message > ), > TP_FIELDS( > ctf_integer(int, message_number, message->number) > ctf_integer(int, message_action, message->action) > ctf_integer(int, message_count, message->count) > ctf_integer(int, message_source_actor, message->source_actor) > ctf_integer(int, message_destination_actor, message->destination_actor) > ctf_integer(int, message_source_node, message->source_node) > ctf_integer(int, message_destination_node, message->destination_node) > ) > ) > TRACEPOINT_EVENT_INSTANCE( > thorium_message, > thorium_event_template, > actor_send, > TP_ARGS( > struct thorium_message *, message > ) > ) > TRACEPOINT_EVENT_INSTANCE( > thorium_message, > thorium_event_template, > node_send, > TP_ARGS( > struct thorium_message *, message > ) > ) > [...] > Try it and let us know. This should be added to the lttng-gen-tp man > pages if it works. > 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) > RDDC - Centre de recherches de Valcartier | DRDC - Valcartier Research Centre > 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 lttng-dev@lists.lttng.org http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
