Re: [PATCH v2 1/7] scripts: python: Extact necessary information from process event

[Anup Sharma]

On Wed, Jul 05, 2023 at 10:35:02PM -0700, Namhyung Kim wrote:
> Hi Anup,
> 
> On Wed, Jul 5, 2023 at 12:42 PM Anup Sharma <anupnewsmail@xxxxxxxxx> wrote:
> >
> > The script takes in a sample event dictionary(param_dict) and retrieves
> > relevant data such as time stamp, PID, TID, thread name, and call stack
> > information. If available, the call stack is parsed to include function
> > names and the associated DSO, which are requires for creating json schema.
> > Also few libaries has been included which will be used in later commit.
> >
> > Signed-off-by: Anup Sharma <anupnewsmail@xxxxxxxxx>
> > ---
> >  .../scripts/python/firefox-gecko-converter.py | 37 +++++++++++++++++++
> >  1 file changed, 37 insertions(+)
> >  create mode 100644 tools/perf/scripts/python/firefox-gecko-converter.py
> >
> > diff --git a/tools/perf/scripts/python/firefox-gecko-converter.py b/tools/perf/scripts/python/firefox-gecko-converter.py
> > new file mode 100644
> > index 000000000000..ce663840d212
> > --- /dev/null
> > +++ b/tools/perf/scripts/python/firefox-gecko-converter.py
> > @@ -0,0 +1,37 @@
> > +#!/usr/bin/env python3

I believe this is not needed as we are using perf-script-python interface.

> > +# SPDX-License-Identifier: GPL-2.0
> > +#
> > +# Usage:
> > +#
> > +#     perf record -a -g -F 99 sleep 1
> > +#     perf script firefox-gecko-converter.py
> > +
> > +from __future__ import print_function
> 
> Is this needed for python3?

No, it is not needed. I will remove it.

>
> > +import os
> > +import sys
> > +import json
> > +from functools import reduce
> > +
> > +sys.path.append(os.environ['PERF_EXEC_PATH'] + \
> > +       '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
> > +
> > +from perf_trace_context import *
> > +from Core import *
> > +
> > +def process_event(param_dict):
> > +       time_stamp = (param_dict['sample']['time'] // 1000) / 1000
> > +       pid = param_dict['sample']['pid']
> > +       tid = param_dict['sample']['tid']
> > +       thread_name = param_dict['comm']
> > +       start_time = time_stamp if not start_time else start_time
> > +       if param_dict['callchain']:
> > +               stack = []
> > +               for call in param_dict['callchain']:
> > +                       if 'sym' not in call:
> > +                               continue
> > +                       stack.append(call['sym']['name'] + f' (in {call["dso"]})')
> > +               if len(stack) != 0:
> > +                       stack = stack[::-1]
> > +       else:
> > +               mod = param_dict['symbol'] if 'symbol' in param_dict else '[unknown]'
> 
> Why is it 'mod' instead of 'sym' or 'func'?

I will change it to 'func'. It will be more meaningful.

> 
> Thanks,
> Namhyung
> 
> 
> > +               dso = param_dict['dso'] if 'dso' in param_dict else '[unknown]'
> > --
> > 2.34.1
> >