259756 2023-08-02 17:53:45 -0700 GPUP WebGL in MiniBrowser still continuously allocates IOSurfaces 2024-01-04 03:50:33 -0800 1 1 1 Unclassified WebKit WebGL WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 255860 267054 1 kbr webkit-unassigned dino kbr kkinnunen webkit-bug-importer oldest_to_newest 1969357 0 467185 kbr 2023-08-02 17:53:45 -0700 Created attachment 467185 Test case When MiniBrowser is run in WebKit2 mode with GPUP WebGL enabled, the attached test case causes IOSurfaces to be continuously allocated because they're in use too long. Increasing maxReusedDrawingBuffers in Source/WebCore/platform/graphics/cocoa/GraphicsContextGLCocoa.h causes the drawing buffers to be recycled. (Locally, I increased them to 6, but a smaller number would probably work.) To reproduce: 1) Serve up the attached test case on localhost 2) Add an fprintf to stderr in this code which calls EGL_CreatePbufferFromClientBuffer: https://github.com/WebKit/WebKit/blob/main/Source/WebCore/platform/graphics/cocoa/GraphicsContextGLCocoa.mm#L625 3) Tools/WebKit/build-webkit 4) Tools/WebKit/run-minibrowser Note that there's a continuous stream of output. 1969358 1 kbr 2023-08-02 17:54:52 -0700 Note: discovered while investigating ANGLE/Metal issue in Chromium: crbug.com/1468346 . 1970403 2 webkit-bug-importer 2023-08-09 17:54:11 -0700 <rdar://problem/113659847> 467185 2023-08-02 17:53:45 -0700 2023-08-02 17:53:45 -0700 Test case clouds_high_perf_gpu_with_fps.html text/html 17335 kbr PGh0bWw+CjxzdHlsZT4KICBodG1sLCBib2R5IHsKICBtYXJnaW46IDA7CiAgaGVpZ2h0OiAxMDAl Owp9Ci5vdXRlciB7CiAgZGlzcGxheTogZmxleDsKICB3aWR0aDogMTAwJTsKICBoZWlnaHQ6IDEw MCU7Cn0KLm91dGVyPiogewogIGZsZXg6IDAgMCA1MCU7CiAgcG9zaXRpb246IHJlbGF0aXZlOwp9 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