big.LITTLE cpu-pinning

ROCKPro64

• ROCKpro64 by PINE64
  • Rockchip RK3399
• big.LITTLE architecture:
  • Quad Cortex-A53 0xd03
  • Dual Cortex-A72 0xd08

NOTE: "CPU part" identifies the A53 and A72 CPUs respectively.

mbohun@rockpro64a:~$ cat /proc/cpuinfo | grep -E "processor|model name|CPU part"
processor       : 0
CPU part        : 0xd03
processor       : 1
CPU part        : 0xd03
processor       : 2
CPU part        : 0xd03
processor       : 3
CPU part        : 0xd03
processor       : 4
CPU part        : 0xd08
processor       : 5
CPU part        : 0xd08
mbohun@rockpro64a:~$

Quad Cortex-A53

mbohun@rockpro64a:~$ cpupower frequency-info
analyzing CPU 1:
driver: cpufreq-dt
CPUs which run at the same hardware frequency: 0 1 2 3
CPUs which need to have their frequency coordinated by software: 0 1 2 3
  maximum transition latency: 40.0 us
  hardware limits: 408 MHz - 1.42 GHz
  available frequency steps:  408 MHz, 600 MHz, 816 MHz, 1.01 GHz, 1.20 GHz, 1.42 GHz
  available cpufreq governors: performance schedutil
  current policy: frequency should be within 408 MHz and 1.42 GHz.
                  The governor "schedutil" may decide which speed to use
                  within this range.
  current CPU frequency: Unable to call hardware
  current CPU frequency: 1.01 GHz (asserted by call to kernel)
mbohun@rockpro64a:~$

Dual Cortex-A72

mbohun@rockpro64a:~$ cpupower --cpu 4 frequency-info
analyzing CPU 4:
driver: cpufreq-dt
  CPUs which run at the same hardware frequency: 4 5
  CPUs which need to have their frequency coordinated by software: 4 5
  maximum transition latency: 465 us
  hardware limits: 408 MHz - 1.80 GHz
  available frequency steps:  408 MHz, 600 MHz, 816 MHz, 1.01 GHz, 1.20 GHz, 1.42 GHz, 1.61 GHz, 1.80 GHz
  available cpufreq governors: performance schedutil
  current policy: frequency should be within 408 MHz and 1.80 GHz.
                  The governor "schedutil" may decide which speed to use
                  within this range.
  current CPU frequency: Unable to call hardware
  current CPU frequency: 816 MHz (asserted by call to kernel)
mbohun@rockpro64a:~$

Orange Pi 5 Pro

• Orange Pi 5 Pro by Orange Pi
  • Rockchip RK3588S
• big.LITTLE architecture:
  • quad-core A55 0xd05
  • quad-core A76 0xd0b

mbohun@orangepi5pro:~$ cat /proc/cpuinfo | grep -E "processor|model name|CPU part"
processor       : 0
CPU part        : 0xd05
processor       : 1
CPU part        : 0xd05
processor       : 2
CPU part        : 0xd05
processor       : 3
CPU part        : 0xd05
processor       : 4
CPU part        : 0xd0b
processor       : 5
CPU part        : 0xd0b
processor       : 6
CPU part        : 0xd0b
processor       : 7
CPU part        : 0xd0b

REFERENCES:

• https://wiki.pine64.org/wiki/ROCKPro64
• TODO