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how to change max cpu frequencies tinkerboard

constantius

By constantius
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constantius

constantius

Posted
Posted

i have upgraded armbian on tinkerboard asus form 5.35 to 5.38. 

And this changed cpu governor to conservative. I have changed it to performance. BUT previous max cpu speed was 1.80GHZ and now i have only 1.61.GHZ

I have cooler with fan on my tinkerboard and iam not scared high cpu temperature.

Hov to get back to the maximum 1.80 GHZ frequency ????

I cant add 180000MHZ via sudo nano /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies to each core permission denied.

please help 
 

TonyMac32

TonyMac32

Posted
Posted

... 

 

Please tell me which image that is, also, perform an apt update and apt upgrade.  I'm unaware of any image missing those op points, but to be fair I don't install every single generated image.

TonyMac32

TonyMac32

Posted
Posted

If you apt upgrade let me know what kernel you wind up with, and double check the available frequencies.  The op points are defined in the device tree, they shouldn't have changed.  I will verify later

JMCC

JMCC

Posted
Posted
7 hours ago, constantius said:

now i have only 1.61.GHZ

Are you sure it is not thermal throttling? Please check the SoC temperature (sudo armbianmonitor -m), and if it is above 70º C, it is probably throttling down the CPU frequency to cool down the SoC (Note: I'm not sure about the exact temperature that starts thermal throttling in kernel 4.14.14, that was just a guess. Maybe @TonyMac32 knows the exact number).

constantius

constantius

Posted
  • Author
Posted

yes i have been done apt-get update and upgrade, nothing is to upgrade because cpu governor and maximum frequency has changed before the last upgrade one day ago..... in sys/devices/system/cpu/cpu0/cpufreq/cpu_freqency_scaling there is only 1600 Mhz max speed. on xfce4-cpu-frequency plugin i can see only 1.61 GHZ max speed. Was 1800 before upgrade... i removed cpufrequtils but it did not help.

constantius

constantius

Posted
  • Author
Posted

i have tried this from miqi board - but it does not work either

overclocking to 2.2Ghz is possible with (patched) mainline kernel. Enable with:

echo 1 > /sys/devices/system/cpu/cpufreq/boost # enable turbo - permission disabled even i do it as root

nano /etc/default/cpufrequtils # adjust new limit-  no such file

/etc/init.d/cpufrequtils restart # restart cpufrequtils

 

well and how can i changed it?

chwe

chwe

Posted
Posted

comes from this here:

 

https://github.com/TinkerBoard/debian_kernel/blob/12e65902b4fdcd5211e498ad72543891aebdf596/arch/arm/boot/dts/rk3288.dtsi#L212

vs. 

https://github.com/rockchip-linux/kernel/blob/2b3fe0f3500bd62ea6ba3a2da177edda27a8d6ea/arch/arm/boot/dts/rk3288.dtsi#L233

 

the RK kernel hasn't defined opp>1.6GHz....

You might adjust it, test if it runs stable and then use it.. This needs at least recompilation of the devicetree.. 

1
TonyMac32

TonyMac32

Posted
Posted

Right, however I have that patched in the build system to add those speeds.  Like I said I'll have to download and verify what's going on there.

Rfreire

Rfreire

Posted
Posted (edited)
15 minutes ago, TonyMac32 said:

Right, however I have that patched in the build system to add those speeds.  Like I said I'll have to download and verify what's going on there.

 

Word. I can confirm that it is defined in 4.4-120 build:

  

[rfreire@rf tools-rf]$ grep -A7 opp-1800000000 ./cache-build-armbian/sources/linux-rockchip/release-4.4/arch/arm/boot/dts/rk3288.dtsi
		opp-1800000000 {
			opp-hz = /bits/ 64 <1800000000>;
			opp-microvolt = <1350000>;
			opp-microvolt-L0 = <1400000>;
			opp-microvolt-L1 = <1350000>;
			opp-microvolt-L2 = <1300000>;
			clock-latency-ns = <40000>;
};
[rfreire@rf tools-rf]$ 
  
// In the Tinkerboard:
  
[root@rasp-rodhome ~]# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies 
126000 216000 408000 600000 696000 816000 1008000 1200000 1416000 1512000 1608000 1704000 1800000 
[root@rasp-rodhome ~]# 
[root@rasp-rodhome ~]# 
[root@rasp-rodhome ~]# cat /proc/version 
Linux version 4.4.120-beleza-10-rockchip (root@f1b58cf9c773) (gcc version 7.2.1 20171011 (Linaro GCC 7.2-2017.11) ) #25 SMP Mon Apr 9 03:59:22 UTC 2018

 

Edited by Rfreire
Added available freqs
chwe

chwe

Posted
Posted

Confirmed that at least on armbians development branch.. the Opps are there:

  

        opp-1512000000 {
            opp-hz = <0x00000000 0x00000287>;
            opp-microvolt = <0x0013d620>;
            opp-microvolt-L0 = <0x0013d620>;
            opp-microvolt-L1 = <0x001312d0>;
            opp-microvolt-L2 = <0x00124f80>;
            clock-latency-ns = <0x00009c40>;
        };
        opp-1608000000 {
            opp-hz = <0x00000000 0x00000287>;
            opp-microvolt = <0x00149970>;
            opp-microvolt-L0 = <0x00149970>;
            opp-microvolt-L1 = <0x0013d620>;
            opp-microvolt-L2 = <0x001312d0>;
            clock-latency-ns = <0x00009c40>;
        };
        opp-1704000000 {
            opp-hz = <0x00000000 0x00000287>;
            opp-microvolt = <0x00149970>;
            opp-microvolt-L0 = <0x00149970>;
            opp-microvolt-L1 = <0x0013d620>;
            opp-microvolt-L2 = <0x001312d0>;
            clock-latency-ns = <0x00009c40>;
        };
        opp-1800000000 {
            opp-hz = <0x00000000 0x00000287>;
            opp-microvolt = <0x00149970>;
            opp-microvolt-L0 = <0x00155cc0>;
            opp-microvolt-L1 = <0x00149970>;
            opp-microvolt-L2 = <0x0013d620>;
            clock-latency-ns = <0x00009c40>;
        };

@constantius

can you extract the dtb and show those parts? 

 

How to extract the corresponding dtb (somewhere in /boot):

http://beginlinux.blogspot.ch/2014/01/convert-back-dtb-to-dts-file.html

 

and report what's inside (at least the part with the opp table)?

constantius

constantius

Posted
  • Author
Posted

Ok. Im not developer. I will wait for patch from TonyMac32.  Please add 1.80 Ghz speed to device tree. Both for debian 9 next and ubuntu 16.04 based armbian's versions. There is a difference between 1.6 and 1.8GHZ. for example in web browsing and when you use GUI.  This speed decrease is strange because cpu is not getting fast hot like some allwinners cpus.  Thanks in advance.

TonyMac32

TonyMac32

Posted
Posted
1 hour ago, constantius said:

Ok. Im not developer

The instructions don't require you to be a developer, simply cut and paste some lines into a terminal, changing the "<>" entries to the proper file names.  However in this case it is not necessary.

 

1 hour ago, constantius said:

I will wait for patch from TonyMac32.

As for the patch, it is already there, the current version in the download page is Armbian 5.41 for ubuntu desktop.  Stretch is not officially supoported as yet, so it is lagging behind as it is not built as often, but all builds should have the newest kernel available, however, it is common across all distros.

 

1 hour ago, constantius said:

There is a difference between 1.6 and 1.8GHZ.

 

Approximately 200 MHz, or 11%

 

1 hour ago, constantius said:

This speed decrease is strange because cpu is not getting fast hot like some allwinners cpus.

 

It would seem you have a device tree that doesn't have the op points, it has nothing to do with temperature in this case.

 

@Igor, it looks like the repo is not up to date on the Rockchip kernels, showing the 5.38 kernel 4.14.14 as the latest, which is about a week or so too old to have the opp table repaired after we shuffled kernels. 

Igor

Igor

Posted
Posted
1 minute ago, TonyMac32 said:

it looks like the repo is not up to date on the Rockchip kernels, showing the 5.38 kernel 4.14.14 as the latest, which is about a week or so too old to have the opp table repaired after we shuffled kernels. 


Main repository? Recompile rockchip-next from development branch and push up?

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