[v3,0/3] trace-cruncher: Add support for event probes

Message

Tzvetomir Stoyanov (VMware) Jan. 27, 2022, 7:01 a.m. UTC

Event probe (eprobe) is a new type of ftrace dynamic events, introduced
in the Linux kernel 5.15 version. It is useful to have support for them
in trace-cruncher, as it allows more flexibility when printing event's
data.

v3 changes:
 - Added eporbe example.
v2 changes:
 - Rebase.
 - Moved unit test in a separate patch.
 - Added a check in the unit test if the kernel supports eprobes.
 - Renamed the API from PyFtrace_register_eprobe() to PyFtrace_eprobe(), for
   consistency with the other dynamic events APIs.

Tzvetomir Stoyanov (VMware) (3):
  trace-cruncher: Add support for event probes
  trace-cruncher: Unit test for event probes API
  trace-cruncher: Example for event probes API

 examples/eprobe.py                            | 29 +++++++++++
 src/ftracepy-utils.c                          | 32 ++++++++++++
 src/ftracepy-utils.h                          |  2 +
 src/ftracepy.c                                |  5 ++
 .../tests/1_unit/test_01_ftracepy_unit.py     | 50 +++++++++++++++++++
 5 files changed, 118 insertions(+)
 create mode 100755 examples/eprobe.py

Comments

Yordan Karadzhov Jan. 27, 2022, 10:45 a.m. UTC | #1

Hi Ceco,

I am applying this patch-set. Thanks a lot!

However, there is more work to do. Now, when we have the low-level API for eprobes, it is time to think for adding also 
some high-level APIs. You can have a look in:
tracecruncher/ft_utils.py

and get some ideas from the classes 'kprobe' and 'kretval_probe'

cheers,
Yordan


On 27.01.22 г. 9:01 ч., Tzvetomir Stoyanov (VMware) wrote:
> Event probe (eprobe) is a new type of ftrace dynamic events, introduced
> in the Linux kernel 5.15 version. It is useful to have support for them
> in trace-cruncher, as it allows more flexibility when printing event's
> data.
> 
> v3 changes:
>   - Added eporbe example.
> v2 changes:
>   - Rebase.
>   - Moved unit test in a separate patch.
>   - Added a check in the unit test if the kernel supports eprobes.
>   - Renamed the API from PyFtrace_register_eprobe() to PyFtrace_eprobe(), for
>     consistency with the other dynamic events APIs.
> 
> Tzvetomir Stoyanov (VMware) (3):
>    trace-cruncher: Add support for event probes
>    trace-cruncher: Unit test for event probes API
>    trace-cruncher: Example for event probes API
> 
>   examples/eprobe.py                            | 29 +++++++++++
>   src/ftracepy-utils.c                          | 32 ++++++++++++
>   src/ftracepy-utils.h                          |  2 +
>   src/ftracepy.c                                |  5 ++
>   .../tests/1_unit/test_01_ftracepy_unit.py     | 50 +++++++++++++++++++
>   5 files changed, 118 insertions(+)
>   create mode 100755 examples/eprobe.py
>