1*4882a593SmuzhiyunWhat: /sys/firmware/opal/psr 2*4882a593SmuzhiyunDate: August 2017 3*4882a593SmuzhiyunContact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> 4*4882a593SmuzhiyunDescription: Power-Shift-Ratio directory for Powernv P9 servers 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun Power-Shift-Ratio allows to provide hints the firmware 7*4882a593Smuzhiyun to shift/throttle power between different entities in 8*4882a593Smuzhiyun the system. Each attribute in this directory indicates 9*4882a593Smuzhiyun a settable PSR. 10*4882a593Smuzhiyun 11*4882a593SmuzhiyunWhat: /sys/firmware/opal/psr/cpu_to_gpu_X 12*4882a593SmuzhiyunDate: August 2017 13*4882a593SmuzhiyunContact: Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org> 14*4882a593SmuzhiyunDescription: PSR sysfs attributes for Powernv P9 servers 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun Power-Shift-Ratio between CPU and GPU for a given chip 17*4882a593Smuzhiyun with chip-id X. This file gives the ratio (0-100) 18*4882a593Smuzhiyun which is used by OCC for power-capping. 19