[Webkit-unassigned] [Bug 187696] [GTK] Epiphany causes high, and perhaps excessive GPU load with amdgpu graphics

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=187696

Michael Catanzaro <mcatanzaro at igalia.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mcatanzaro at igalia.com
            Summary|[GTK] Epiphany causes high, |[GTK] Epiphany causes high,
                   |and perhaps excessive GPU   |and perhaps excessive GPU
                   |load                        |load with amdgpu graphics

--- Comment #1 from Michael Catanzaro <mcatanzaro at igalia.com> ---
Carlos Garcia and I have both noticed excessive CPU usage under Wayland sessions, but we don't know what's causing it. You're the first to report an issue with GPU usage, though.

It doesn't help that amdgpu graphics are new and not quite popular yet. :(

(In reply to Kristoffer from comment #0)
> In this specific test case I had one tab open with a YouTube-video playing,
> but pretty much any website shows similar result.

It actually shouldn't... YouTube triggers GPU use because it requires either 3D transforms or animations. Other websites should not use the GPU at all. You can verify by playing with the environment variable WEBKIT_DISABLE_COMPOSITING_MODE=1 (should disable GPU use regardless of website) or WEBKIT_FORCE_COMPOSITING_MODE=1 (should force it regardless of website).

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