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+-- Forum: ROCKPRO64 (https://forum.pine64.org/forumdisplay.php?fid=98)
+--- Forum: Linux on RockPro64 (https://forum.pine64.org/forumdisplay.php?fid=101)
+--- Thread: How to push up to maximum frequency. (/showthread.php?tid=6469)
How to push up to maximum frequency. - jzhang18 - 08-27-2018
Hostname: rockpro64
CPU Frequency:
Core0: 1416Mhz
Core1: 1416Mhz
Core2: 1416Mhz
Core3: 1416Mhz
Core4: 1800Mhz
Core5: 1800Mhz
CPU Governor: performance
Temperature: 40 C
I am wondering how I can push 4 LITTLE cores to 1.5Ghz and 2 big cores to 2.0Ghz.
For Banana PI M3, there is a file called sys_config.fex, has content like:
B_LV3_freq = 1608000000
B_LV3_volt = 920
B_LV4_freq = 1200000000
B_LV4_volt = 840
B_LV5_freq = 0
B_LV5_volt = 840
B_LV6_freq = 0
B_LV6_volt = 840
B_LV7_freq = 0
B_LV7_volt = 840
B_LV8_freq = 0
B_LV8_volt = 840
[vf_table1]
I am thinking if there is similar file in rockpro64, so I can tune it by myself to unlock 2.0Ghz/1.5Ghz
BTW - I have a good power supply 12V/6A, full height heat sink, and a good cooling fan running on top of the sink. want to unlock the potential of RK3399 CPU
RE: How to push up to maximum frequency. - dukla2000 - 08-27-2018
(08-27-2018, 01:43 PM)jzhang18 Wrote: I am wondering how I can push 4 LITTLE cores to 1.5Ghz and 2 big cores to 2.0GhzNo doubt will come at some stage but you could have quite a wait
- Ayufan stated 1st goal was stability for his stuff
- He has published recipe here for Rock64 - you need to understand the device tree it seems
- Reading the RK3399 spec, Rockchip only claim 1.8 & 1.4 (linked on wiki, page 63) (If playing with DT then spec max VDD for A72 is 1.25V, 1.20V for A53)
RE: How to push up to maximum frequency. - jzhang18 - 08-27-2018
That sounds good.
thanks.
RE: How to push up to maximum frequency. - dukla2000 - 09-14-2018
OK - think I have a fairly stable kernel running 2.0/1.5GHz.
My original sbc-bench results on 4.4.138 Ayufan kernel.
My latest sbc-bench results on 4.18-rc8 kernel I have hacked.
Which are pretty similar to those for a NanoPi M4. (Also RK3399, they have DDR3 mem AFAIK which seems a bit faster)
And for completeness (on the 4.18 kernel), my SM961:
Code:
iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2
[sudo] password for chris:
Iozone: Performance Test of File I/O
Version $Revision: 3.429 $
Compiled for 64 bit mode.
Build: linux
....
Run began: Fri Sep 14 20:04:25 2018
...
Command line used: iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2
...
random random bkwd record stride
kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread
102400 4 66040 113883 120757 122602 47917 112507
102400 16 218566 333375 344785 354516 121497 330740
102400 512 625190 598033 783060 952460 613227 624786
102400 1024 632915 585959 874944 979528 751608 624748
102400 16384 471660 624576 1313697 1468580 1451902 635818