oneapi-src
Inconsistent Core Configuration Reporting on Arc A380
Intel’s official specification [1] for the Arc A380 reports the following:
- Xe-Cores: 8
- Render Slices: 2
- XVE: 128
Which implies 16 XVE * 4 Xe-Cores * 2 Render Slices = Total 128 Xe-Cores * SIMD8 = 1024 “shader cores”. This means that there are 16 XVE per Xe-Cores which is consistent with oneAPIs GPU Optimization Guide “An Xe-core of the Xe-HPG GPU contains 16 vector and 16 matrix engines” [2] But when using Level Zero to query the GPU configuration we get the following result:
- physicalEUSimdWidth = 8
- numEUsPerSubslice = 8
- numSubslicesPerSlice = 8
- numSlices = 2
Which reports that each Xe-Core (Subslice) has 8 XVE (EUs) and that each Render Slice has 8 Xe-Cores. Is it possible that there are two different ways of counting XVEs and Xe-Cores?
As an aside it seems that GPU-Z reports something completely different with 2048 shader cores which would result in 256 XVEs.
[1] https://www.intel.com/content/www/us/en/products/sku/227959/intel-arc-a380-graphics/specifications.html [2] https://www.intel.com/content/www/us/en/docs/oneapi/optimization-guide-gpu/2025-0/intel-xe-gpu-architecture.html
