Gentoo And Turbo Boost (SOLVED)

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paulb787 · Post by **paulb787** » Tue Oct 18, 2011 4:35 am

I have a bios overclock with my i7 2600k set to 4.8ghz. i have noticed that cat /proc/cpuinfo shows my freq 2100mhz even when at load?
I can also tell by my core temps that it seems like this overclock is not in effect? What is going on here?

Post by **Chiitoo** » Tue Oct 18, 2011 5:15 am

Greetings!

You might want to try

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cpufreq-aperf

which is a part of sys-power/cpufrequtils and should give you rather accurate readings at a 1 second interval by default.
I might be completely wrong, but I think /proc/cpuinfo does only show the 'supposed' speeds.

I hope this helps!

paulb787 · Post by **paulb787** » Tue Oct 18, 2011 8:51 pm

I actually emerged i7z which confirmed my suspicions. i am only getting 3400mhz? I dont even get to 3800 my stock turbo let alone 4800mhz? Works in WIndows!
PLEASE HELP?
?

whiteghost · Post by **whiteghost** » Wed Oct 19, 2011 4:24 am

i have a thuban cpu and it overclocks. and cat /proc/cpuinfo shows every time i adjust it.

i want full performance (run f@h) so frequency adjust, power saving, hibernation, etc are disabled.

take a look at pappy's http://kernel-seeds.org/settings-01.html up to page 4 for kernel/cpu settings.

dE_logics · Post by **dE_logics** » Wed Oct 19, 2011 4:31 am

Linux employees dynamic frequency scaling which will scale down the frequency when there's no load, also I head there's a kernel feature by which the kernel allows you to use your full CPUs thermal budget by automatically overclocking it if temperature is low.

See content of /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq

paulb787 · Post by **paulb787** » Wed Oct 19, 2011 9:38 am

Just to clarify i am running a stress test on the cpu to make sure the cores are at load. i installed ubuntu and my overclock works

perfect i get 4.8. On gentoo im only getting 3.4. I cant stand ubuntu as gentoo believe it or not was my first distro. I have read the acpi

options could be the problem but i have dissabled them and and i seem to lose HT (hyperthtreading) and am still stuck at 3400mhz.

Please any suggestions it is so frustrating to know how much i am loosing here?

paulb787 · Post by **paulb787** » Wed Oct 19, 2011 2:14 pm

FIGURED IT OUT AFTER COMPARING KERNELS! Trying to narrow down what i did.
this should be a wiki im sure there are many people with i7's that are not getting turbo boost.

DaggyStyle · Post by **DaggyStyle** » Wed Oct 19, 2011 3:44 pm

paulb787 wrote:FIGURED IT OUT AFTER COMPARING KERNELS! Trying to narrow down what i did.
this should be a wiki im sure there are many people with i7's that are not getting turbo boost.

if you've solved it, please mark the thread as solved in the title and be kind and share with us the solution.

thanks.

paulb787 · Post by **paulb787** » Fri Oct 21, 2011 12:35 am

Sorry it took me soo long to post a solution i had to narrow it down to figure out what i did.

Solution:
1. Emerge i7z
2. In terminal type i7z and run
3. Look at your cpu frequency i have an intel i7 2600k. It runs at 3400mhz and turbos up to 3800mhz. If its not working you will only be able to see 3400mhz as it fluxuates.
4. In kernel config make sure under acpi/scaleing/ that your default govener is performance. and under x86 cpu frquency scaling make sure acpi frequency P-states driver is compiled in.
5. make, reboot and re-run i7z

DirtyHairy · Post by **DirtyHairy** » Fri Oct 21, 2011 7:57 am

I agree with the P-states, but not with the governor --- I am using ondemand and turbo works fine

dE_logics · Post by **dE_logics** » Fri Oct 21, 2011 1:16 pm

Using performance governor is not a good idea.

tnt · Post by **tnt** » Fri Oct 21, 2011 8:37 pm

DirtyHairy wrote:I agree with the P-states, but not with the governor --- I am using ondemand and turbo works fine

+1

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Cpu speed from cpuinfo 3299.00Mhz                                                                          
cpuinfo might be wrong if cpufreq is enabled. To guess correctly try estimating via tsc                    
Linux's inbuilt cpu_khz code emulated now                                                                  
True Frequency (without accounting Turbo) 3299 MHz                                                         
  CPU Multiplier 33x || Bus clock frequency (BCLK) 99.97 MHz                                               
                                                                                                           
Socket [0] - [physical cores=4, logical cores=4, max online cores ever=4]                                  
  TURBO ENABLED on 4 Cores, Hyper Threading OFF                                                            
  True Frequency 3398.97 MHz (99.97 x [34])                                                                
  Max TURBO Multiplier (if Enabled) with 1/2/3/4 Cores is  45x/45x/45x/45x                                 
  Current Frequency 4498.66 MHz [99.97 x 45.00] (Max of below)                                             
        Core [core-id]  :Actual Freq (Mult.)      C0%   Halt(C1)%  C3 %   C6 %   C7 %  Temp                
        Core 1 [0]:       4498.64 (45.00x)       100       0       0       0       0    70                 
        Core 2 [1]:       4498.65 (45.00x)       100       0       0       0       0    75                 
        Core 3 [2]:       4498.66 (45.00x)       100       0       0       0       0    74                 
        Core 4 [3]:       4498.64 (45.00x)       100       0       0       0       0    73

Gentoo And Turbo Boost (SOLVED)

Gentoo And Turbo Boost (SOLVED)

Hello and