Re: [PATCH v2] libtracefs: New API for getting synthetic event

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On Fri, Jan 14, 2022 at 4:58 PM Yordan Karadzhov <y.karadz@xxxxxxxxx> wrote:
>
>
>
> On 14.01.22 г. 12:12 ч., Tzvetomir Stoyanov wrote:
> > On Fri, Jan 14, 2022 at 10:17 AM Yordan Karadzhov (VMware)
> > <y.karadz@xxxxxxxxx> wrote:
> >>
> >> A new API is proposed, to get tep event descriptor for given synthetic
> >> event:
> >>
> >> tracefs_synth_get_event ()
> >>
> >> The API implementation gets derived from the implementation of the
> >> existing API  tracefs_dynevent_get_event(). It can detect any newly
> >> created or removed synthetic events.
> >>
> >> Signed-off-by: Yordan Karadzhov (VMware) <y.karadz@xxxxxxxxx>
> >> ---
> >>   Documentation/libtracefs-synth2.txt | 13 +++++++++++--
> >>   include/tracefs-local.h             |  2 ++
> >>   include/tracefs.h                   |  2 ++
> >>   src/tracefs-dynevents.c             | 17 +----------------
> >>   src/tracefs-events.c                | 21 +++++++++++++++++++++
> >>   src/tracefs-hist.c                  | 18 ++++++++++++++++++
> >>   6 files changed, 55 insertions(+), 18 deletions(-)
> >>
> >> diff --git a/Documentation/libtracefs-synth2.txt b/Documentation/libtracefs-synth2.txt
> >> index 8056ab8..444318c 100644
> >> --- a/Documentation/libtracefs-synth2.txt
> >> +++ b/Documentation/libtracefs-synth2.txt
> >> @@ -6,7 +6,8 @@ NAME
> >>   tracefs_synth_create, tracefs_synth_destroy, tracefs_synth_echo_cmd, tracefs_synth_complete,
> >>   tracefs_synth_get_start_hist, tracefs_synth_trace, tracefs_synth_snapshot,
> >>   tracefs_synth_get_name, tracefs_synth_raw_fmt, tracefs_synth_show_event,
> >> -tracefs_synth_show_start_hist, tracefs_synth_show_end_hist - Creation of synthetic events
> >> +tracefs_synth_show_start_hist, tracefs_synth_show_end_hist, tracefs_synth_get_event
> >
> > The new API should be added also in Documentation/libtracefs.txt, the
> > main man page with all APIs. Forgot to mention that in the previous
> > review.
> >
>
> Hmm, I see absolutely no tracefs_synth_*() APIs in Documentation/libtracefs.txt.
> Maybe this can be fixed in a separate patch.
>

Yes, the whole synth_* section is missing, so I submitted a patch to
update that list. We can add tracefs_synth_get_event() later, when it
is accepted.

> thanks,
> Yordan
>
>
>
> > [ ...  ]
> >
> >



-- 
Tzvetomir (Ceco) Stoyanov
VMware Open Source Technology Center




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