On Sun, Aug 09, 2009 at 04:01:30PM -0700, Arjan van de Ven wrote: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.
Ah right... I always forget the offline report case.
But you can at least reuse this existing helper to resolve
the id to name.