All of lore.kernel.org
 help / color / mirror / Atom feed
From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: Git Mailing List <git@vger.kernel.org>
Cc: Derrick Stolee <stolee@gmail.com>,
	Jeff Hostetler <git@jeffhostetler.com>, Jeff King <peff@peff.net>,
	Junio C Hamano <gitster@pobox.com>,
	Josh Steadmon <steadmon@google.com>,
	Johannes Schindelin <Johannes.Schindelin@gmx.de>
Subject: I made a flame graph renderer for git's trace2 output
Date: Fri, 10 May 2019 17:09:58 +0200	[thread overview]
Message-ID: <87zhnuwdkp.fsf@evledraar.gmail.com> (raw)

Here's a flamegraph of where git's test suite spends its time on my box:
https://vm.nix.is/~avar/noindex/git-tests.svg

I hacked up a script for this today to plot trace2 production data, as
noted there it's at:
https://github.com/avar/FlameGraph/tree/stackcollapse-git-tr2-event

What are flamegraphs? See http://www.brendangregg.com/flamegraphs.html

As noted in TODOs in the script there's various stuff I'd like to do
better, and this also shows how we need a lot more trace regions to get
granular data.

But it's already quite cool, and I'll keep improving it. I'll submit a
PR to Brendan's parent repo once I'm happy enough with it, I figure it
makes more sense there than in git.git, but maybe we'd eventually want
to teach the test suite to optionally use something like this.

             reply	other threads:[~2019-05-10 15:10 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-10 15:09 Ævar Arnfjörð Bjarmason [this message]
2019-05-10 16:38 ` I made a flame graph renderer for git's trace2 output Derrick Stolee
2019-05-10 17:00   ` SZEDER Gábor
2019-05-20 18:49     ` Jeff Hostetler
2019-05-10 21:03 ` Jeff King
2019-05-10 21:57   ` Ævar Arnfjörð Bjarmason
2019-05-20 18:22     ` Jeff Hostetler
2019-05-21 14:19       ` Ævar Arnfjörð Bjarmason
2019-05-21 20:46         ` Jeff Hostetler

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=87zhnuwdkp.fsf@evledraar.gmail.com \
    --to=avarab@gmail.com \
    --cc=Johannes.Schindelin@gmx.de \
    --cc=git@jeffhostetler.com \
    --cc=git@vger.kernel.org \
    --cc=gitster@pobox.com \
    --cc=peff@peff.net \
    --cc=steadmon@google.com \
    --cc=stolee@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.