# CPU
## CPU Attributes
Attributes specific to a cpu instance.
| Attribute | Type | Description | Examples | Stability |
|---|---|---|---|---|
| `cpu.logical_number` | int | The logical CPU number [0..n-1] | `1` |  |
| `cpu.mode` | string | The mode of the CPU | `user`; `system` |  |
---
`cpu.mode` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.
| Value | Description | Stability |
|---|---|---|
| `idle` | Idle |  |
| `interrupt` | Interrupt |  |
| `iowait` | IO Wait |  |
| `kernel` | Kernel |  |
| `nice` | Nice |  |
| `steal` | Steal |  |
| `system` | System |  |
| `user` | User |  |