v8/tools/turbolizer
Michael Starzinger 8d921ca7f3 [turbofan] Remove --turbo shorthand for --turbo-filter.
This removes the --turbo flag and solely relies on the filter pattern
provided via --turbo-filter when deciding whether to use TurboFan. Note
that disabling optimization wholesale can still be done with --no-opt,
which should be used in favor of --no-turbo everywhere.

Also note that this contains semantic changes to the TurboFan activation
criteria. We respect the filter pattern more stringently and no longer
activate TurboFan just because the source contains patterns forcing use
of Ignition via {AstNumberingVisitor::DisableFullCodegenAndCrankshaft}.

R=rmcilroy@chromium.org
BUG=v8:6408

Change-Id: I0c855f6a62350eb62283a3431c8cc1baa750950e
Reviewed-on: https://chromium-review.googlesource.com/528121
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46167}
2017-06-23 11:19:19 +00:00
..
code-view.js [turbolizer] Use textContent to set code view 2017-03-29 14:28:32 +00:00
constants.js [turbolizer] Improved display of perf profiling information. 2016-09-14 09:45:41 +00:00
disassembly-view.js [turbolizer] Match instruction offsets as a hexadecimal numbers 2017-05-15 17:43:26 +00:00
edge.js [turbolizer] Enlarge node labels and bubbles. Fix dead node display on old JSON. 2016-08-11 16:46:18 +00:00
empty-view.js
expand-all.jpg
graph-layout.js [turbolizer] Enlarge node labels and bubbles. Fix dead node display on old JSON. 2016-08-11 16:46:18 +00:00
graph-view.js [turbolizer] Enlarge node labels and bubbles. Fix dead node display on old JSON. 2016-08-11 16:46:18 +00:00
hide-selected.png
hide-unselected.png
index.html [turbolizer] Improved display of perf profiling information. 2016-09-14 09:45:41 +00:00
lang-disassembly.js
layout-icon.png
left-arrow.png
live.png [turbolizer] Visualize also the dead nodes. 2016-08-09 16:20:32 +00:00
monkey.js
node.js [turbolizer] Fix distinguishing simplified nodes 2016-11-24 15:32:42 +00:00
OWNERS
README.md [turbofan] Remove --turbo shorthand for --turbo-filter. 2017-06-23 11:19:19 +00:00
right-arrow.png
schedule-view.js [turbolizer] Recognize nested [] in json file 2016-11-07 01:51:19 +00:00
search2.png
search.png
selection-broker.js [turbolizer] Use locations rather than ranges everywhere 2016-08-10 14:46:11 +00:00
selection.js [turbolizer] Use locations rather than ranges everywhere 2016-08-10 14:46:11 +00:00
text-view.js [turbolizer] Improved display of perf profiling information. 2016-09-14 09:45:41 +00:00
turbo-visualizer.css [turbolizer] Improved display of perf profiling information. 2016-09-14 09:45:41 +00:00
turbo-visualizer.js [turbolizer] Improved display of perf profiling information. 2016-09-14 09:45:41 +00:00
types.png
upload-icon.png
util.js [turbolizer] Factor out some user actions into methods of GraphView. 2016-07-25 14:25:46 +00:00
view.js [turbolizer] Use locations rather than ranges everywhere 2016-08-10 14:46:11 +00:00

Turbolizer

Turbolizer is a HTML-based tool that visualizes optimized code along the various phases of Turbofan's optimization pipeline, allowing easy navigation between source code, Turbofan IR graphs, scheduled IR nodes and generated assembly code.

Turbolizer consumes .json files that are generated per-function by d8 by passing the '--trace-turbo' command-line flag.

Host the turbolizer locally by starting a web server that serves the contents of the turbolizer directory, e.g.:

cd src/tools/turbolizer
python -m SimpleHTTPServer 8000

Optionally, profiling data generated by the perf tools in linux can be merged with the .json files using the turbolizer-perf.py file included. The following command is an example of using the perf script:

perf script -i perf.data.jitted -s turbolizer-perf.py turbo-main.json

The output of the above command is a json object that can be piped to a file which, when uploaded to turbolizer, will display the event counts from perf next to each instruction in the disassembly. Further detail can be found in the bottom of this document under "Using Perf with Turbo."

Using the python interface in perf script requires python-dev to be installed and perf be recompiled with python support enabled. Once recompiled, the variable PERF_EXEC_PATH must be set to the location of the recompiled perf binaries.

Graph visualization and manipulation based on Mike Bostock's sample code for an interactive tool for creating directed graphs. Original source is at https://github.com/metacademy/directed-graph-creator and released under the MIT/X license.

Icons derived from the "White Olive Collection" created by Breezi released under the Creative Commons BY license.

Using Perf with Turbo

In order to generate perf data that matches exactly with the turbofan trace, you must use either a debug build of v8 or a release build with the flag 'disassembler=on'. This flag ensures that the '--trace-turbo' will output the necessary disassembly for linking with the perf profile.

The basic example of generating the required data is as follows:

perf record -k mono /path/to/d8 --trace-turbo --perf-prof main.js
perf inject -j -i perf.data -o perf.data.jitted
perf script -i perf.data.jitted -s turbolizer-perf.py turbo-main.json

These commands combined will run and profile d8, merge the output into a single 'perf.data.jitted' file, then take the event data from that and link them to the disassembly in the 'turbo-main.json'. Note that, as above, the output of the script command must be piped to a file for uploading to turbolizer.

There are many options that can be added to the first command, for example '-e' can be used to specify the counting of specific events (default: cycles), as well as '--cpu' to specify which CPU to sample.