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SubjectRe: [PATCH] thermal: trace: migrating thermal traces to use TRACE_DEFINE_ENUM() macros
On Tue,  1 Mar 2016 17:38:54 +0000
Michele Di Giorgio <michele.digiorgio@arm.com> wrote:

> Userspace tools are not aware of how to convert the enums provided by
> the tracepoints to their corresponding strings.
>
> Adding TRACE_DEFINE_ENUM() macros allows to make the enums available
> to userspace to let the tools know what those enum values represent.
>
> In particular, for thermal zone trip types what we obtained before was
> something like:
>
> kworker/1:1-460 [001] 320.372732: thermal_zone_trip: thermal_zone=soc
> id=0 trip=1 trip_type=1
>
> Unfortunately, userspace tools do not know how to convert enum values to
> strings and as a consequence they can only forward the enum value to the
> output. By using TRACE_DEFINE_ENUM() macros for thermal traces we get the
> following trace line:
>
> kworker/1:1-460 [001] 320.372732: thermal_zone_trip: thermal_zone=soc
> id=0 trip=1 trip_type=PASSIVE
>
> Userspace tools are now able to better understand the meaning of the trip_type
> and provide the user with more readable information.
>

Acked-by: Steven Rostedt <rostedt@goodmis.org>

-- Steve

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