duggasco/bc250-40cu-unlock
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956cee126cd49103c8262ffdf9c658a4398b281e
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2 Commits

Author SHA1 Message Date
root
956cee126c Add reproducible A/B/A benchmark script 
Runs llama-bench pp512 at 24 CU, 40 CU, then 24 CU again with cooldown
between each state. Uses UMR to toggle SPI_PG_ENABLE_STATIC_WGP_MASK.
Auto-detects model, bench binary, and UMR paths.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-05-18 20:57:30 +00:00
root
f8fcde6129 BC-250 40 CU unlock: kernel patch, build script, and documentation 
Re-enable all 40 CUs on the AMD BC-250 (gfx1013 / Cyan Skillfish) via
two register writes during amdgpu driver init:

- CC_GC_SHADER_ARRAY_CONFIG: clears harvest enumeration mask
- SPI_PG_ENABLE_STATIC_WGP_MASK: enables hardware wave dispatch to all WGPs

Both required — neither alone is sufficient. Verified 1.61x compute
scaling at 1500MHz (pp512: 230 → 372 tok/s) via controlled A/B/A testing.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
 2026-05-18 20:29:56 +00:00