| What: /sys/firmware/opal/psr |
| Date: August 2017 |
| Contact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> |
| Description: Power-Shift-Ratio directory for Powernv P9 servers |
| |
| Power-Shift-Ratio allows to provide hints the firmware |
| to shift/throttle power between different entities in |
| the system. Each attribute in this directory indicates |
| a settable PSR. |
| |
| What: /sys/firmware/opal/psr/cpu_to_gpu_X |
| Date: August 2017 |
| Contact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> |
| Description: PSR sysfs attributes for Powernv P9 servers |
| |
| Power-Shift-Ratio between CPU and GPU for a given chip |
| with chip-id X. This file gives the ratio (0-100) |
| which is used by OCC for power-capping. |
