linux-kernel - Re: [PATCH v3 4/6] scripts: python: Add trace end processing and JSON output

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Date:   Wed, 12 Jul 2023 10:28:42 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Anup Sharma <anupnewsmail@...il.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 4/6] scripts: python: Add trace end processing and JSON output

On Mon, Jul 10, 2023 at 4:13 PM Anup Sharma <anupnewsmail@...il.com> wrote:
>
> Inside the trace end function the final output will be dumped
> to standard output in JSON gecko format. Additionally, constants
> such as USER_CATEGORY_INDEX, KERNEL_CATEGORY_INDEX, CATEGORIES, and
> PRODUCT are defined to provide contextual information.
>
> Signed-off-by: Anup Sharma <anupnewsmail@...il.com>

Acked-by: Ian Rogers <irogers@...gle.com>

> ---
>  .../scripts/python/firefox-gecko-converter.py | 34 ++++++++++++++++++-
>  1 file changed, 33 insertions(+), 1 deletion(-)
>
> diff --git a/tools/perf/scripts/python/firefox-gecko-converter.py b/tools/perf/scripts/python/firefox-gecko-converter.py
> index 0b8a86bdcab1..39818a603265 100644
> --- a/tools/perf/scripts/python/firefox-gecko-converter.py
> +++ b/tools/perf/scripts/python/firefox-gecko-converter.py
> @@ -24,8 +24,40 @@ from Core import *
>  thread_map = {}
>  start_time = None
>
> +# Follow Brendan Gregg's Flamegraph convention: orange for kernel and yellow for user
> +CATEGORIES = [
> +    {'name': 'User', 'color': 'yellow', 'subcategories': ['Other']},
> +    {'name': 'Kernel', 'color': 'orange', 'subcategories': ['Other']}
> +]

A follow up could be to make these command line options, defaulting to
orange and yellow.

Thanks,
Ian

> +
> +# The product name is used by the profiler UI to show the Operating system and Processor.
> +PRODUCT = os.popen('uname -op').read().strip()
> +
>  def trace_end():
> -       pass
> +    thread_array = thread_map.values()))
> +
> +    result = {
> +        'meta': {
> +            'interval': 1,
> +            'processType': 0,
> +            'product': PRODUCT,
> +            'stackwalk': 1,
> +            'debug': 0,
> +            'gcpoison': 0,
> +            'asyncstack': 1,
> +            'startTime': start_time,
> +            'shutdownTime': None,
> +            'version': 24,
> +            'presymbolicated': True,
> +            'categories': CATEGORIES,
> +            'markerSchema': []
> +            },
> +        'libs': [],
> +        'threads': thread_array,
> +        'processes': [],
> +        'pausedRanges': []
> +    }
> +    json.dump(result, sys.stdout, indent=2)
>
>  def process_event(param_dict):
>         global start_time
> --
> 2.34.1
>