| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | What: /sys/firmware/opal/psr |
| 2 | Date: August 2017 |
| 3 | Contact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> |
| 4 | Description: Power-Shift-Ratio directory for Powernv P9 servers |
| 5 | |
| 6 | Power-Shift-Ratio allows to provide hints the firmware |
| 7 | to shift/throttle power between different entities in |
| 8 | the system. Each attribute in this directory indicates |
| 9 | a settable PSR. |
| 10 | |
| 11 | What: /sys/firmware/opal/psr/cpu_to_gpu_X |
| 12 | Date: August 2017 |
| 13 | Contact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> |
| 14 | Description: PSR sysfs attributes for Powernv P9 servers |
| 15 | |
| 16 | Power-Shift-Ratio between CPU and GPU for a given chip |
| 17 | with chip-id X. This file gives the ratio (0-100) |
| 18 | which is used by OCC for power-capping. |