Hi Sebastien, A simple Python script using the Babeltrace bindings would probably do the job here. See [1] for an example using the bindings.
Thanks, Christian [1] - https://lttng.org/docs/#doc-viewing-and-analyzing-your-traces On Fri, Oct 17, 2014 at 6:23 PM, Boisvert, Sebastien <[email protected]> wrote: > Bonjour, > > First, thank you for LTTng-UST. This is very useful and convenient. > > I just got started today using LTTng (LTTng-UST) for tracing a HPC application > that I am working on (I am a postdoc). I am impressed by how easy LTTng is to > use it. > > In my system, an actor message is represented by a pair > <message_actor_source, message_number>. > > I want to list all messages that have a high delivery time > (message:actor_receive - message:actor_send). > > I am doing this to get the messages of one actor (actor 1000019): > > [boisvert@bigmem biosal]$ babeltrace ~/lttng-traces/auto-20141017-181240|grep > "message_source_actor = 1000019" > actor_1000019 > > Then, I can look at one message with (message <1000019, 14>): > > [boisvert@bigmem biosal]$ grep "message_number = 14," actor_1000019 > [18:12:43.647017211] (+0.000005110) bigmem.knoxville.kbase.us > message:actor_send: { cpu_id = 30 }, { message_number = 14, message_action = > 31592, message_count = 8, message_source_actor = 1000019, > message_destination_actor = 1000059, message_source_node = -1, > message_destination_node = -1 } > [18:12:43.647025249] (+0.000002860) bigmem.knoxville.kbase.us > message:actor_receive: { cpu_id = 49 }, { message_number = 14, message_action > = 31592, message_count = 8, message_source_actor = 1000019, > message_destination_actor = 1000059, message_source_node = 3, > message_destination_node = 3 } > > If I substract the times: > > irb(main):003:0> (43.647025249-43.647017211)*10**9 > => 8038.00000426236 > > This message (<1000019, 14>) required 8038 ns for the delivery. This one is > fine. > > > So basically my question is: > > Is there an easy way to analyze these tracepoint files ? > _______________________________________________ > lttng-dev mailing list > [email protected] > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev _______________________________________________ lttng-dev mailing list [email protected] http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
