[Webkit-unassigned] [Bug 223767] New: [Metal ANGLE] fast/canvas/webgl/out-of-bounds-simulated-vertexAttrib0-drawArrays.html causes GPURestarts on some machines

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=223767

            Bug ID: 223767
           Summary: [Metal ANGLE]
                    fast/canvas/webgl/out-of-bounds-simulated-vertexAttrib
                    0-drawArrays.html causes GPURestarts on some machines
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: ANGLE
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: kpiddington at apple.com
                CC: dino at apple.com, kkinnunen at apple.com

When running fast/canvas/webgl/out-of-bounds-simulated-vertexAttrib0-drawArrays.html, some Intel machines experience GPURestarts. These restarts can cause waterfall effects, making other tests fail in parallel, and sometimes blacklisting the test running process from executing GPU work. this results in a cascade of unrelated failures.
The actual issue is unrelated to ANGLE, but rather the driver on the host systems. Submitting a large render workload (1 trillion+ points) causes the Intel GPUDriver to restart. 
To mitigate this issue, we can submit a smaller workload for this test, until the underlying driver bug is fixed.

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