Bill Holler wrote: > Hi tesla-dev, > > We need to disable deep C-States when cpu_deep_idle is set > to disable in /etc/power.conf. This happens at run time when > pmconf runs. We also need to be able to re-enable deep C-States > at run time when cpu_deep_idle is set to enable or default > and pmconfig is run. > > cpudrv sets the per-cpu idle function pointer and global "wakeup" > pointer to functions that manage different C-States. Setting all > cpu's idle_cpu function pointer and disp_enq_thread back to their > non-deep c-state function will allow full performance by > bypassing all of the deep C-State code. At first it seems like > a simple matter of just doing idle_cpu = shadow_idle_cpu for > all cpus from the cpu_deep_idle callback function. > > However this does not work with _CST change notifications. > Does anyone have thoughts on this? > > Regards, > Bill >
We can simply ignore _CST change notification when cpu_deep_idle is set(deep cstate is disabled)? and re-evaluate _CST in the callback function when deep cstate is enabled again. What do you think? Thanks, -Aubrey
