| Bug ID | 99488 |
|---|---|
| Summary | [r600g]OpenCL driver causes process to hang in ImageMagick's Gaussian Blur kernel |
| Product | Mesa |
| Version | git |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | Drivers/Gallium/r600 |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | nixscripter@gmail.com |
| QA Contact | dri-devel@lists.freedesktop.org |
(Bug number three. I can almost taste victory...) If I compile ImageMagick with OpenCL support, the current version will hang when I invoke the Gaussian blur operation. More specifically, the CPU will run at 100%, and memory consumed by the process will increase indefinitely at 19 MB per second, but nothing will happen. The blur operation is done internally for many other operations, so this issue is more crippling than it first appears. To reproduce: 1. Get the current tree of ImageMagick from GitHub: https://github.com/ImageMagick/ImageMagick 2. Compile it with OpenCL and HDRI support (--enable-opencl --enable-hdri flags). 3. Get an image, and try to perform a simple Gaussian blur: convert input.png -blur 0x20 output.png 4. The hang will occur... at least, on my system. I mentioned this in another bug, and was told that on different hardware than mine (I have a Radeon HD 5700, which is an Evergreen chipset) all of the ImageMagick self-tests pass. The source code for all OpenCL kernels is in MagickCore/accelerate-kernels-private.h. Several functions are involved with blurring, and unfortunately it's difficult to identify the source of the hang. I would be happy to provide debugging information if I could be advised on how to collect it. LLVM version: r292714 Mesa version: commit bb5db5564 ImageMagick version: commit 43a09ba75 (Note: the next git revision was broken by upstream)
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