On Wed, 11 Jun 2014 15:53:42 +0100
Punit Agrawal <[email protected]> wrote:
> >
> > /sys/kernel/debug/thermal/thermal_zone_trip/format
>
> I don't have this file but found the following which seems to contain
> the format.
Yeah, that was typed manually, forgot "tracing". I mount the debugfs
system at /debug for easier typing. I hate the /sys/kernel/debug path.
Too much typing.
>
> # pwd /sys/kernel/debug/tracing/events/thermal/thermal_zone_trip
> # cat format
> name: thermal_zone_trip
> ID: 463
> format:
> field:unsigned short common_type; offset:0; size:2;
> signed:0;
> field:unsigned char common_flags; offset:2; size:1;
> signed:0;
> field:unsigned char common_preempt_count; offset:3;
> size:1; signed:0;
> field:int common_pid; offset:4; size:4; signed:1;
>
> field:__data_loc char[] thermal_zone; offset:8; size:4;
> signed:0;
> field:int id; offset:12; size:4; signed:1;
> field:int trip; offset:16; size:4; signed:1;
> field:enum thermal_trip_type trip_type; offset:20; size:4;
> signed:0;
>
> print fmt: "thermal_zone=%s id=%d trip=%d trip_type=%s",
> __get_str(thermal_zone), REC->id, REC->trip, __print_symbolic(REC->trip_type,
> { THERMAL_TRIP_ACTIVE, "active" }, { THERMAL_TRIP_PASSIVE, "passive" }, {
> THERMAL_TRIP_HOT, "hot" }, { THERMAL_TRIP_CRITICAL, "critical" })
>
For it to work with trace-cmd (and perf) you'll need to add a plugin to
define what those enums are. This is the file that trace-cmd uses to
foramat. But it has no idea how to convert something like
THERMAL_TRIP_PASSIVE into a number.
-- Steve
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