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diff --git a/testing/talos/perfdocs/index.rst b/testing/talos/perfdocs/index.rst new file mode 100644 index 0000000000..3561f250c2 --- /dev/null +++ b/testing/talos/perfdocs/index.rst @@ -0,0 +1,122 @@ +===== +Talos +===== + +Talos is a cross-platform Python performance testing framework that is specifically for +Firefox on desktop. New performance tests should be added to the newer framework +`mozperftest </testing/perfdocs/mozperftest.html>`_ unless there are limitations +there (highly unlikely) that make it absolutely necessary to add them to Talos. Talos is +named after the `bronze automaton from Greek myth <https://en.wikipedia.org/wiki/Talos>`_. + +Talos tests are run in a similar manner to xpcshell and mochitests. They are started via +the command :code:`mach talos-test`. A `python script <https://searchfox.org/mozilla-central/source/testing/talos>`_ +then launches Firefox, which runs the tests via JavaScript special powers. The test timing +information is recorded in a text log file, e.g. :code:`browser_output.txt`, and then processed +into the `JSON format supported by Perfherder <https://searchfox.org/mozilla-central/source/testing/mozharness/external_tools/performance-artifact-schema.json>`_. + +Talos bugs can be filed in `Testing::Talos <https://bugzilla.mozilla.org/enter_bug.cgi?product=Testing&component=Talos>`_. + +Talos infrastructure is still mostly documented `on the Mozilla Wiki <https://wiki.mozilla.org/TestEngineering/Performance/Talos>`_. +In addition, there are plans to surface all of the individual tests using PerfDocs. +This work is tracked in `Bug 1674220 <https://bugzilla.mozilla.org/show_bug.cgi?id=1674220>`_. + +Examples of current Talos runs can be `found in Treeherder by searching for "Talos" <https://treeherder.mozilla.org/jobs?repo=autoland&searchStr=Talos>`_. +If none are immediately available, then scroll to the bottom of the page and load more test +runs. The tests all share a group symbol starting with a :code:`T`, for example +:code:`T(c d damp g1)` or :code:`T-gli(webgl)`. + +Running Talos Locally +********************* + +Running tests locally is most likely only useful for debugging what is going on in a test, +as the test output is only reported as raw JSON. The CLI is documented via: + +.. code-block:: bash + + ./mach talos-test --help + +To quickly try out the :code:`./mach talos-test` command, the following can be run to do a +single run of the DevTools' simple netmonitor test. + +.. code-block:: bash + + # Run the "simple.netmonitor" test very quickly with 1 cycle, and 1 page cycle. + ./mach talos-test --activeTests damp --subtests simple.netmonitor --cycles 1 --tppagecycles 1 + + +The :code:`--print-suites` and :code:`--print-tests` are two helpful command flags to +figure out what suites and tests are available to run. + +.. code-block:: bash + + # Print out the suites: + ./mach talos-test --print-suites + + # Available suites: + # bcv (basic_compositor_video) + # chromez (about_preferences_basic:tresize:about_newtab_with_snippets) + # dromaeojs (dromaeo_css:kraken) + # flex (tart_flex:ts_paint_flex) + # ... + + # Run all of the tests in the "bcv" test suite: + ./mach talos-test --suite bcv + + # Print out the tests: + ./mach talos-test --print-tests + + # Available tests: + # ================ + # + # a11yr + # ----- + # This test ensures basic a11y tables and permutations do not cause + # performance regressions. + # + # about_newtab_with_snippets + # -------------------------- + # Load about ActivityStream (about:home and about:newtab) with snippets enabled + # + # ... + + # Run the tests in "a11yr" listed above + ./mach talos-test --activeTests a11yr + +Running Talos on Try +******************** + +Talos runs can be generated through the mach try fuzzy finder: + +.. code-block:: bash + + ./mach try fuzzy + +The following is an example output at the time of this writing. Refine the query for the +platform and test suites of your choosing. + +.. code-block:: + + | test-windows10-64-qr/opt-talos-bcv-swr-e10s + | test-linux64-shippable/opt-talos-webgl-e10s + | test-linux64-shippable/opt-talos-other-e10s + | test-linux64-shippable-qr/opt-talos-g5-e10s + | test-linux64-shippable-qr/opt-talos-g4-e10s + | test-linux64-shippable-qr/opt-talos-g3-e10s + | test-linux64-shippable-qr/opt-talos-g1-e10s + | test-windows10-64/opt-talos-webgl-gli-e10s + | test-linux64-shippable/opt-talos-tp5o-e10s + | test-linux64-shippable/opt-talos-svgr-e10s + | test-linux64-shippable/opt-talos-flex-e10s + | test-linux64-shippable/opt-talos-damp-e10s + > test-windows7-32/opt-talos-webgl-gli-e10s + | test-linux64-shippable/opt-talos-bcv-e10s + | test-linux64-shippable/opt-talos-g5-e10s + | test-linux64-shippable/opt-talos-g4-e10s + | test-linux64-shippable/opt-talos-g3-e10s + | test-linux64-shippable/opt-talos-g1-e10s + | test-linux64-qr/opt-talos-bcv-swr-e10s + + For more shortcuts, see mach help try fuzzy and man fzf + select: <tab>, accept: <enter>, cancel: <ctrl-c>, select-all: <ctrl-a>, cursor-up: <up>, cursor-down: <down> + 1379/2967 + > talos |