Code bug degrades Intel GPU ray tracing performance

The Intel Linux GPU driver developers have submitted a fix that improves ray tracing performance on Intel GPUs by a factor of 100. The update was merged into Mesa 22.2 and is expected to be available to end users by the end of August. The problem with Intel’s older drivers was that the temporary memory used for ray tracing work was not using the faster GPU memory, but was using the slower system memory, and constantly moving data to memory and back again definitely degraded performance. Ensuring ray tracing uses video memory improves performance by a hundredfold.

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