Messages in this thread |  | | | Date | Sun, 09 Aug 2009 16:01:30 -0700 | | From | Arjan van de Ven <> | | Subject | Re: perf: store and retrieve trace event names in the perf.data file |
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Frederic Weisbecker wrote: > On Sun, Aug 09, 2009 at 02:49:23PM -0700, Arjan van de Ven wrote: >> In order to be able to use trace events, a key aspect is the "type" field; >> this is the id of the event that you recorded, as stored in the /sys/kernel/debug/events/*/*/id file. >> What is currently missing is a way to map the id number (which is not abi stable) >> to the event that was recorded. > > > > We already have that. > See tools/perf/util/parse-events.c: char *tracepoint_id_to_name(u64 id)
sadly... we don't.
You do it *on the same boot and machine* as you created the perf.data file. You don't have it when you reboot into a new kernel, or move the perf.data file to a new machine........ Which is to be honest a very common usecase.
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