linux-kernel - Re: [PATCH] perf script: add flamegraph.py script

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Date:   Tue, 24 Mar 2020 11:16:41 -0500
From:   Kim Phillips <kim.phillips@....com>
To:     Andreas Gerstmayr <agerstmayr@...hat.com>,
        linux-perf-users@...r.kernel.org
Cc:     Martin Spier <mspier@...flix.com>,
        Brendan Gregg <bgregg@...flix.com>,
        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@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf script: add flamegraph.py script

On 3/20/20 10:13 AM, Andreas Gerstmayr wrote:
> This script works in tandem with d3-flame-graph to generate flame graphs
> from perf. It supports two output formats: JSON and HTML (the default).
> The HTML format will look for a standalone d3-flame-graph template file in
> /usr/share/d3-flame-graph/d3-flamegraph-base.html and fill in the collected
> stacks.
> 
> Usage:
> 
>     perf record -a -g -F 99 sleep 60
>     perf script report flamegraph

On Ubuntu 19.10, where python 2.7 is still the default, I get:

$ perf script report flamegraph
  File "/usr/libexec/perf-core/scripts/python/flamegraph.py", line 46
    print(f"Flame Graph template {self.args.template} does not " +
                                                               ^
SyntaxError: invalid syntax
Error running python script /usr/libexec/perf-core/scripts/python/flamegraph.py

Installing libpython3-dev doesn't help.

$ perf script -s lang

Scripting language extensions (used in perf script -s [spec:]script.[spec]):

  Perl                                       [Perl]
  pl                                         [Perl]
  Python                                     [Python]
  py                                         [Python]

Should there be a python3 in that list?

Thanks,

Kim