[Webkit-unassigned] [Bug 133517] New: [GTK] 4 of the css3/viewport-percentage-lengths/viewport-percentage-lengths-.*.html tests time out

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=133517

           Summary: [GTK] 4 of the
                    css3/viewport-percentage-lengths/viewport-percentage-l
                    engths-.*.html tests time out
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: clopez at igalia.com
                CC: bjonesbe at adobe.com


The following tests ( added on http://trac.webkit.org/changeset/169407 ) time out on GTK:

css3/viewport-percentage-lengths/viewport-percentage-lengths-anonymous-block.html
css3/viewport-percentage-lengths/viewport-percentage-lengths-percent-size-child.html
css3/viewport-percentage-lengths/viewport-percentage-lengths-relative-font-size.html
css3/viewport-percentage-lengths/viewport-percentage-lengths-resize.html


The tests timeout always when the tests are run inside Xvfb (this is the default, and what the GTK bots do).

But when you run them on a real X server (this is done by exporting the environment variable USE_NATIVE_XDISPLAY) some of them pass:

$ USE_NATIVE_XDISPLAY=1 Tools/Scripts/run-webkit-tests --release --webkit-test-runner --gtk css3/viewport-percentage-lengths/viewport-percentage-lengths-anonymous-block.html css3/viewport-percentage-lengths/viewport-percentage-lengths-percent-size-child.html css3/viewport-percentage-lengths/viewport-percentage-lengths-relative-font-size.html css3/viewport-percentage-lengths/viewport-percentage-lengths-resize.html
Using port 'gtk-wk2'
Test configuration: <, x86, release>
Placing test results in /home/clopez/webkit/webkit/WebKitBuild/Release/layout-test-results
Baseline search path: gtk-wk2 -> wk2 -> gtk -> generic
Using Release build
Pixel tests disabled
Regular timeout: 6000, slow test timeout: 30000
Command line: /home/clopez/webkit/webkit/WebKitBuild/Release/bin/WebKitTestRunner -

Found 4 tests; running 4, skipping 0.
Running 1 WebKitTestRunner.     

[1/4] css3/viewport-percentage-lengths/viewport-percentage-lengths-anonymous-block.html failed unexpectedly (test timed out)
[3/4] css3/viewport-percentage-lengths/viewport-percentage-lengths-relative-font-size.html failed unexpectedly (test timed out)

Retrying 2 unexpected failure(s) ...

Running 1 WebKitTestRunner.

[2/2] css3/viewport-percentage-lengths/viewport-percentage-lengths-relative-font-size.html failed unexpectedly (test timed out)

2 tests ran as expected, 2 didn't:


Unexpected flakiness: timeouts (1)
  css3/viewport-percentage-lengths/viewport-percentage-lengths-anonymous-block.html [ Timeout Pass ]


Regressions: Unexpected timeouts (1)
  css3/viewport-percentage-lengths/viewport-percentage-lengths-relative-font-size.html [ Timeout ]


Maybe this information can be useful.

I tried to run the tests with --no-timeout and also with --time-out-ms=30000 (30 secs), but the behaviour is the same. They timeout always with Xvfb.

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