[RFC] Add a reference OpenCL layer implementation #1190
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This adds a proof-of-concept of an OpenCL layer [0], a feature provided by OpenCL-ICD-Loader, that adds the capability to trace OpenCL calls without direct modifications to application code. The current version only wraps around the - clEnqueueNDRangeKernel - clFinish functions and is limited to 32 combinations of cl_context and cl_device_id for getting their appropriate TracyCLCtx. [0] https://github.com/KhronosGroup/OpenCL-ICD-Loader#about-layers
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This is an RFC where I'd like to learn whether there's an interest in a Tracy-owned implementation of a OpenCL layer (https://github.com/KhronosGroup/OpenCL-ICD-Loader#about-layers) allowing to wrap around OpenCL calls to provide tracing functionality without direct modifications of application code.
This is an early PoC that works in my limited personal testing. Some considerations for further development would be
Name, location, build system, name conventions are all up for discussion.
To test this, one needs to compile and launch their profiled application together with
OPENCL_LAYERSpointed to the appropriate shared object orOPENCL_LAYER_PATHpointed at a directory where to scan for the shared object.If the layer is loaded correctly, you should see a message at the top of the message log.