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CentOS 7 and Frequency Scaling
Hello,
Need lil help here.
I got a new server with CentOS 7. But having issue setting the frequency to max.
I can see its using "powersave" profile via cpupower frequency-info but even when I change it to "performance" and adjust min frequency, its somehow still using the default settings. (1.2Ghz to 2.6Ghz)
So, how do you guys set your servers??
Any recommended way ?? Or you think I should let it run on default values??
PS. I be setting few KVM VPS on this server so want to have max speed to guest.
Thanks
Comments
You shouldn't normally touch those unless you run into problems in production.
I would have gone for default if its a single server setup. Since I am going to setup KVM, wanted to run CPU at its default frequency.
You keep this to default (i.e. powersave) for all servers ?
Yeah, you normally keep the default governor unless you have issues.
Why would you increase power consumption and make it worse for the environment if you have no need to ?
If the OS will need more power it will scale the CPU up as needed. There's no need for it to be scaled up while idling.
Power/Performance options are available in BIOS, good to check this once and choose a right power profile depends on your requirements.
Any other opinions on this ??
Are you guys keeping "powersave" default option or "performance" or simply disabling intel_pstate ? Or anything else.
CentOS 7 has a nice utility tuned-adm. For more info see
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Performance_Tuning_Guide/sect-Red_Hat_Enterprise_Linux-Performance_Tuning_Guide-Tool_Reference-tuned_adm.html