| Bug ID | 97461 |
|---|---|
| Summary | FS-UAE waits forever with glClientWaitSync() when using glFenceSync() on amdgpu/radeonsi |
| Product | Mesa |
| Version | git |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | Drivers/Gallium/radeonsi |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | lem.jjr@gmail.com |
| QA Contact | dri-devel@lists.freedesktop.org |
Created attachment 125993 [details] apitrace of fs-uae waiting forever after using glFenceSync() Hi, In recent mesa-git (during August 2016), there was a change to amdgpu/radeonsi that has caused FS-UAE (Amiga emulator) to wait forever with glClientWaitSync() after using glFenceSync(). While it is waiting, it uses 24% CPU but does not cause the CPU to clock to higher pstates. Using an alternative OpenGL rendering mode that does not include fences allows FS-UAE to start as expected. This problem is not present on nVidia, AMDGPU-PRO, nor open source amdgpu as shipped with Ubuntu 16.04, and has only been a problem during this month (August 2016). Hardware: AMD FX-8350 AMD Radeon 380X 4Gb Asus MG279 27" 2560x1440 144Hz IPS, connected via DisplayPort Software: Ubuntu 16.04 AMD64 Padoka PPA FS-UAE 2.7.14dev2 from https://launchpad.net/~fengestad/+archive/ubuntu/devel Notable apitrace output on frame number 3 of a waiting instance of fs-uae (from the attached apitrace file): 1490 @0 glFenceSync(condition = GL_SYNC_GPU_COMMANDS_COMPLETE, flags = 0) = 0x8aba220 1491 @0 glFlush() 1492 @0 glClientWaitSync(sync = 0x8aba220, flags = GL_SYNC_FLUSH_COMMANDS_BIT, timeout = 0) = GL_TIMEOUT_EXPIRED 1493 @0 glClientWaitSync(sync = 0x8aba220, flags = 0x0, timeout = 0) = GL_TIMEOUT_EXPIRED ..... 15561 @0 glClientWaitSync(sync = 0x8aba220, flags = 0x0, timeout = 0) = GL_TIMEOUT_EXPIRED I suspect this will be related to the fences work that has been committed recently? Happy to do more testing. I have also reported the bug in the FS-UAE development thread here: http://eab.abime.net/showpost.php?p=1107609&postcount=1146 In case it's helpful at this point: OpenGL vendor string: X.Org OpenGL renderer string: Gallium 0.4 on AMD TONGA (DRM 3.1.0 / 4.4.0-34-lowlatency, LLVM 4.0.0) OpenGL core profile version string: 4.3 (Core Profile) Mesa 12.1.0-devel - padoka PPA OpenGL core profile shading language version string: 4.30 OpenGL core profile context flags: (none) OpenGL core profile profile mask: core profile OpenGL core profile extensions: OpenGL version string: 3.0 Mesa 12.1.0-devel - padoka PPA OpenGL shading language version string: 1.30 OpenGL context flags: (none) OpenGL ES profile version string: OpenGL ES 3.1 Mesa 12.1.0-devel - padoka PPA OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.10 Cheers
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