| # Intel architectural perfmon unit masks | |
| # | |
| name:zero type:mandatory default:0x0 | |
| 0x0 No unit mask | |
| name:one type:mandatory default:0x1 | |
| 0x1 No unit mask | |
| name:x41 type:mandatory default:0x41 | |
| 0x41 No unit mask | |
| name:x4f type:mandatory default:0x4f | |
| 0x4f No unit mask | |
| # |