[LAU] /dev/cpu_dma_latency or setting '*.max_cstate=0 idle=poll' and power management

[Jeremy Jongepier]

On 04-05-2022 10:49, Jeremy Jongepier wrote:
> Hello,
> 
> How does opening /dev/cpu_dma_latency and disabling CPU sleep states or 
> disabling CPU sleep states with kernel parameters relate to CPU 
> frequency scaling? Does disabling sleep states also disable frequency 
> scaling? Asking this because I'm attempting to rewrite the 
> system_configuration wiki page. Thanks in advance!

Or you could just fire up Ardour yourself with CPU sleep states 
disabled. Doing so doesn't affect CPU frequency scaling when the scaling 
governor has been set to ondemand. Still wondering how these two 
mechanisms, power management and CPU sleep states, relate to each other.

Best,

Jeremy

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