duggasco/bc250-40cu-unlock
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Corrected disable_cu options to reference WGP instead of CU

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Apostolos Grammatopoulos
2026-05-20 00:30:43 +01:00
parent 11093c6226
commit 24882a4a57
1 changed files with 7 additions and 3 deletions
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README.md
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@@ -131,20 +131,24 @@ WGP 1 = CU 2,3 (stock active)
WGP 2 = CU 4,5 (stock active)
WGP 3 = CU 6,7 (unlocked — test these)
WGP 4 = CU 8,9 (unlocked — test these)
WGP CU Map Preview Example:
0 1 2 3 4
■■■■■■□□□□
```
Disabling works at **WGP granularity** — disabling CU 6 also disables CU 7 (same WGP).
Format: `amdgpu.disable_cu=SE.SH.CU` (comma-separated, added to modprobe config)
Format: `amdgpu.disable_cu=SE.SH.WGP` (comma-separated, added to modprobe config)
### Examples
```bash
# Enable all 40, but mask WGP 3 in SE1/SH0 (CUs 6-7) — gives 38 CUs
options amdgpu bc250_cc_write_mode=3 disable_cu=1.0.6,1.0.7
options amdgpu bc250_cc_write_mode=3 disable_cu=1.0.3
# Mask WGP 4 across all shader arrays — gives 32 CUs
options amdgpu bc250_cc_write_mode=3 disable_cu=0.0.8,0.0.9,0.1.8,0.1.9,1.0.8,1.0.9,1.1.8,1.1.9
options amdgpu bc250_cc_write_mode=3 disable_cu=0.0.4,0.1.4,1.0.4,1.1.4
```
### Automated Health Testing