Rendering Core Weekly Update for August 2nd, 2022

[Stephen Chenney]

Hi Folks,

We have a few things on the agenda that I suspect will generate much discussion. Meanwhile, there are no pre-meeting action items.

Stephen.

Aug 2, 2022

Agenda

• Pdr: Updating "Priority 1 Bugs older than 30 days" to "Priority 1 Bugs older than 20 days"?

• Finding Rendering Regressions by Suhwan Song (est: 15min)

• Work on a new “Developer Satisfaction based on Bugs” metric (schenney@, if time permits)

Upcoming Meetings

• Got an idea? Let’s discuss it!

Triage

Team	Untriaged	SLA Misses	Missing Owners
Layout	11	0	0
Style	17	0	0
Editing	7	1	0
Paint	2	0	2
Canvas	4	0	0
DOM	2	0	0

P1 Bugs Exceeding Web Platform SLO

Team	Priority 1 Bugs	Num Unassigned	Priority 1 Bugs older than 30 days
Layout	11	3	1
Style	2	1	1
Editing	6	3	0
Paint	5	0	2
Canvas	13	1	10
DOM	8	0	2

Open, Closed and Fixed

Team	Opened	Closed	Fixed
Layout	52	37	21
Style	13	18	6
Editing	11	11	9
Paint	17	23	10
Canvas	4	4	4
DOM	10	21	9

Total Open

Please take some time to look at your old inactive bugs and give them up for someone else. If you haven’t worked on it for a long time it can’t be super important.

Team	Total Open	Delta	Total Assigned	Delta	New WPT	Run Rate
Layout	1188	9	267	15	0	-3
Style	945	1	264	0	2	-1
Editing	1060	2	77	1	0	-1
Paint	1442	-13	450	3	0	-3
Canvas	362	0	197	4	0	1
DOM	1312	-6	535	0	0	2

 

Regression Bugs

Team	Priority 1 Regressions	Num Unassigned	Priority 1 Regressions older than 15 days	External Assignee	Expected Slow Fix
Layout	3	1	1	0	0
Style	1	0	0	0	0
Editing	0	0	0	0	0
Paint	2	0	1	0	0
Canvas	0	0	0	0	0
DOM	3	1	1	1	0

Web Test Fail/Skipped Counts

The table below is derived from the actual test expectations for recent try bot runs: linux-blink-rel 76632, mac-11-blink-rel 6821, win10.20h2-blink-rel 3382. Counts include virtual test suites owned by the team or testing stable functionality.

All test failures:

• Linux 3392 down 36

• Mac 3684 down 41

• Win 3382 down 44

For some reason, many internal web_tests have not been running, or being reported as running, for the last several weeks, but are back now. This might be related to a change that reduced the data in the results.json file, which was reverted last week if I recall correctly.

Delta in the table below is the rounded average of the platforms.

	Failing				Skipped
Team	Linux	Mac	Win	Delta	Linux	Mac	Win	Delta
Canvas	13	15	15	0	2	2	2	0
DOM	144	158	140	58	101	189	102	36
Editing	0	0	0	0	49	49	49	0
Layout	33	39	34	16	8	13	9	6
Paint	175	188	166	17	20	38	36	7
Style/All	1387	1465	1352	-32	1125	1126	1126	2

Web Test Regressions and Status Changes

When triaging newly added tests, be sure to add necessary information to crbug.com and update the metadata at wpt.fyi.

Test Status Changes, maybe incorrect due to Windows failed test shard:

• No new Web tests (including relevant virtual suites)

• None Internal (that can be detected)

• None Failing:

• None Skipped

• Existing tests - Table Fragmentation is on for test!

• 52 Newly passing

• external/wpt/css/css-break/table/ (41 tests)

• external/wpt/css/css-multicol/table/ (2 tests)

• external/wpt/css/css-forced-color-adjust/parsing/ (2 tests)

• fragmentation/ (6 tests)

• virtual/css-highlight-inheritance/external/wpt/css/css-pseudo/highlight-pseudos-currentcolor-visited-computed-001.html

• 18 new failures

• external/wpt/css/CSS2/floats-clear/clearance-containing-fragmented-float-crash.html

• external/wpt/css/css-break/iframe-in-repeated-table-header-crash.html

• external/wpt/css/css-multicol/table/balance-table-with-border-spacing.html

• external/wpt/css/css-sizing/aspect-ratio/block-aspect-ratio-040.html

• fragmentation/ (8 tests)

• virtual/layout_ng_printing/printing/ (6 tests)

Launch Test Status

Regressions are how many fail in the virtual suite while passing in the default.

Passing compares the virtual / default passing test counts.

Failing/Timeout compares virtual / default failing or timeout results

Skipped compares skipped count for virtual / default

• backface-visibility-interop: Regressions 3, Passing 2144 / 2143, Failing/Timeout 22 / 23, Skipped 4 / 4

• controls-refresh-hc: Regressions 0, Passing 55 / 55, Failing/Timeout 0 / 0, Skipped 0 / 0

• css-highlight-inheritance: Regressions 1, Passing 268 / 244, Failing/Timeout 34 / 58, Skipped 11 / 11

• css-modules: Regressions 0, Passing 14 / 14, Failing/Timeout 0 / 0, Skipped 0 / 0

• layout_ng_printing: Regressions 25, Passing 98 / 124, Failing/Timeout 27 / 2, Skipped 1 / 0

• Percentage of NG Blocks over time, Windows 50th percentile, Stable and Dev

• Stable steady at 99.27%

• Dev down then up to 99.26%

Metrics

Reminder to add any performance wins to go/wp-perfy.

• Nothing of interest.

EngProd (vivianz, weizhong, jonathanjlee)

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