Arch Linux

tuule_

Member

Registered: 2015-06-22

Posts: 5

AMD A10 Turbo Core feature

Hello guys, I do need some help from you.
I'm new to archlinux, but i've used gentoo for a long time.
Trouble is: I can't get Turbo Core working.
cpupower frequency-info

analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 4.0 us.
  hardware limits: 1.10 GHz - 2.10 GHz
  available frequency steps: 2.10 GHz, 1.80 GHz, 1.50 GHz, 1.10 GHz
  available cpufreq governors: ondemand, performance
  current policy: frequency should be within 1.10 GHz and 2.10 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 1.10 GHz (asserted by call to hardware).                                                                                                                                    
  boost state support:                                                                                                                                                                                 
    Supported: yes                                                                                                                                                                                     
    Active: no                                                                                                                                                                                         
    Boost States: 0                                                                                                                                                                                    
    Total States: 5                                                                                                                                                                                    
    Pstate-P0:  2900MHz                                                                                                                                                                                
    Pstate-P1:  2600MHz                                                                                                                                                                                
    Pstate-P2:  2400MHz                                                                                                                                                                                
    Pstate-P3:  2100MHz                                                                                                                                                                                
    Pstate-P4:  1800MHz             

uname -a

Linux betelgeuse 4.0.5-1-ARCH #1 SMP PREEMPT Sat Jun 6 18:37:49 CEST 2015 x86_64 GNU/Linux 

The datasheet of this CPU tells me it can be boosted up to 2900 (as cpupower told), but i'm embarrassed with  Active: no and hardware limits: 1.10 GHz - 2.10 GHz
Google could not help me with this, btw.
BIOS does not have features like "Turbo Core", "CnQ" etc.
Any help would be appreciated!

randomguy

Member

Registered: 2007-06-19

Posts: 101

Re: AMD A10 Turbo Core feature

Sadly I don't have a solution for you but I do remember this thread with two people having similar or same issues. It got binned because one of them didn't use arch, but the issue sounded valid and got confirmed by a second person (which seemed to be using archlinux).
However, I do have a A10-6700T in my possession I haven't got the the time to play with yet. I will try it out soon though and get back to this thread, if I hit the same issue.

Which exact model do you posses?

tuule_

Member

Registered: 2015-06-22

Posts: 5

Re: AMD A10 Turbo Core feature

Sadly I don't have a solution for you but I do remember this thread with two people having similar or same issues. It got binned because one of them didn't use arch, but the issue sounded valid and got confirmed by a second person (which seemed to be using archlinux).
However, I do have a A10-6700T in my possession I haven't got the the time to play with yet. I will try it out soon though and get back to this thread, if I hit the same issue.

Which exact model do you posses?

Thanks for the reply! I'll wait for your tests
I've got the AMD A10-5745M

randomguy

Member

Registered: 2007-06-19

Posts: 101

Re: AMD A10 Turbo Core feature

Out of curiosity I did a quick search and those seem related:

1) http://askubuntu.com/questions/459788/h … untu-14-04
2) http://unix.stackexchange.com/questions … 918#148918

Do you also experience differences when using fglrx in comparison to radeon driver regarding boost frequency?

tuule_

Member

Registered: 2015-06-22

Posts: 5

Re: AMD A10 Turbo Core feature

Out of curiosity I did a quick search and those seem related:

1) http://askubuntu.com/questions/459788/h … untu-14-04
2) http://unix.stackexchange.com/questions … 918#148918

Do you also experience differences when using fglrx in comparison to radeon driver regarding boost frequency?

Thanks for suggestions, but I've already tried links above
I do use fglrx all the time. I've tried radeon driver on gentoo, but it did not help. So, no differences: it does not work

straby187

Member

Registered: 2015-11-06

Posts: 1

Re: AMD A10 Turbo Core feature

If you are using fglrx, then boost is for sure being used but it is really hard to tell. You have to modprobe msr and frequency check while a core is above 3.2Ghz. If you are using Open-source drivers you have to add radeon.bapm=1 to your boot line. I have a a10-5750m and the reason this parameter doesn't come up more often is beacause it is enabled by default, but my chip and I assume other richland APU do not boost unless you set it to...