December Adventure 2024: Day 6
Cognitohazards and Side Quests: Shell Script Profiling: Part 2
Profiling the Entire MyCmd Execution
I wrote yesterday about profiling shell scripts and creating flamegraphs. I continued on that path today.
I realized yesterday I generated a trace from just the execution of
the mycmd project list-tasks command and not the entire
execution of MyCmd. I have some separate variables to start the trace at
the beginning of MyCmd execution, _MYCMD_EARLY_SHELL_TRACE
and _MYCMD_EARLY_TRACE_LOG_FILE. The leading underscores
are because these aren’t really for MyCmd users and more for internal
development. These do similar to what I linked yesterday, but at the
start of bin/mycmd
to trace the entire MyCmd execution.
Re-running with the change to the mycmd-devel task to use the new variables, the following flamegraph is produced:
You can also open the Flamegraph in a new tab and then click to focus on individual portions of the flamegraph.
I promise I will write a separate development log entry explaining the shell script profiling and flamegraph generation in detail so others can adapt it to their own code and not just in MyCmd. Once I do that, I will update this entry with a link to that post.
Querying Call Hierarchies
I pushed commit 4de5d55d8c337d0d612752fec74bcf6f0830d0e5 that included query-call-hierarchy.py and an associated task query-call-hierarchy to call it.
The text output of the above call to
mycmd project run query-call-hierarchy tmp/shell-log-trace mycmd:command_group.register_command_group
The following unique call stacks were found calling 'mycmd:command_group.register_command_group':
---------
mycmd.discover_command_groups_and_commands -> mycmd:pathname.walk_path -> mycmd:pathname.walk_path_for_directory -> mycmd:pathname.walk_path_for_directory -> mycmd.discover_command_groups_and_commands_callback -> mycmd:command_group.register_command_group
---------
mycmd.discover_command_groups_and_commands -> mycmd:pathname.walk_path -> mycmd:pathname.walk_path_for_directory -> mycmd.discover_command_groups_and_commands_callback -> mycmd:command_group.register_command_group
---------
mycmd.discover_command_groups_and_commands -> mycmd:pathname.walk_path -> mycmd:pathname.walk_path_for_directory -> mycmd:pathname.walk_path_for_directory -> mycmd:pathname.walk_path_for_directory -> mycmd.discover_command_groups_and_commands_callback -> mycmd:command_group.register_command_group
---------This is a good first start. I want to update this to output it in a format that Emacs Compilation Mode can understand so I can easily navigate between the different call sites, so this will include file names and line numbers.
Other
This was all I felt up to doing today. Hopefully tomorrow I will have energy to write the development log entry and start using the basic query interface to figure out the naming of things as I mentioned yesterday.
Music
Today was a great new music day.
Bloodywood Featuring BabyMetal - Bekhauf
Two of my favorite bands that I’ve discovered this year, Bloodywood and BabyMetal, released a collaboration, “Bekhauf”, which means “Fearless” in Hindi.
It features singing and rapping in English, Hindi, and Japanese. The music video is animated in a style reminiscent of anime.
An awesome track, as expected by these bands. I’ve loved almost every collaboration that BabyMetal has done.
rosie album by Rosé
Rosé from the K-Pop group BLACKPINK dropped a new album, “rosie” today:
She’s previously released the singles from the album “number one girl”, which is emotional and heart-felt, and “APT.”, a fun song about a Korean drinking game that’s a collaboration with Bruno Mars.
All of my December Adventure 2024 posts will be linked from here.