Support throttling check for OPI

[samfreund]

https://discord.com/channels/725836368059826228/725848198794706994/1361421542931562597

On RPIs, you can see what's causing throttling here:

This isn't currently supported on OPIs, but it would be great if it was.

[Gold856]

We might not be able to list a cause, since I'm not sure Orange Pi has anything that will tell us, but we can check for throttling by checking the CPU(s) scaling MHz field in lscpu:
No throttling:

pi@photonvision:~$ lscpu
Architecture:           aarch64
  CPU op-mode(s):       32-bit, 64-bit
  Byte Order:           Little Endian
CPU(s):                 8
  On-line CPU(s) list:  0-7
Vendor ID:              ARM
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x2
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 100%
    CPU max MHz:        1800.0000
    CPU min MHz:        408.0000
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x2
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 100%
    CPU max MHz:        1800.0000
    CPU min MHz:        408.0000
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x2
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 100%
    CPU max MHz:        1800.0000
    CPU min MHz:        408.0000
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x2
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 100%
    CPU max MHz:        1800.0000
    CPU min MHz:        408.0000
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x4
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 100%
    CPU max MHz:        2304.0000
    CPU min MHz:        408.0000
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x4
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 100%
    CPU max MHz:        2304.0000
    CPU min MHz:        408.0000
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x4
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 100%
    CPU max MHz:        2304.0000
    CPU min MHz:        408.0000
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x4
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 100%
    CPU max MHz:        2304.0000
    CPU min MHz:        408.0000

Tiny bit of throttling?

Architecture:           aarch64
  CPU op-mode(s):       32-bit, 64-bit
  Byte Order:           Little Endian
CPU(s):                 8
  On-line CPU(s) list:  0-7
Vendor ID:              ARM
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x2
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 89%
    CPU max MHz:        1800.0000
    CPU min MHz:        408.0000
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x2
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 89%
    CPU max MHz:        1800.0000
    CPU min MHz:        408.0000
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x2
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 89%
    CPU max MHz:        1800.0000
    CPU min MHz:        408.0000
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x2
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 89%
    CPU max MHz:        1800.0000
    CPU min MHz:        408.0000
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x4
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 96%
    CPU max MHz:        2304.0000
    CPU min MHz:        408.0000
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x4
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 96%
    CPU max MHz:        2304.0000
    CPU min MHz:        408.0000
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x4
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 96%
    CPU max MHz:        2304.0000
    CPU min MHz:        408.0000
    BogoMIPS:           48.00
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimd
                        dp
  Model name:           -
    Model:              Rockchip RK3588S
    Thread(s) per core: 0
    Core(s) per socket: 0
    Socket(s):          0
    Stepping:           0x4
  Model name:           -
    Model:              0
    Thread(s) per core: 1
    Core(s) per socket: 1
    Socket(s):          1
    CPU(s) scaling MHz: 96%
    CPU max MHz:        2304.0000
    CPU min MHz:        408.0000

[Gold856]

Using lscpu -e=SCALMHZ% makes the output much easier to parse:

SCALMHZ%
    100%
    100%
    100%
    100%
    100%
    100%
    100%
    100%

[Gold856]

Here's the output of lscpu on a Raspberry Pi 3b (in case we want to generalize this data):

Architecture:             aarch64
  CPU op-mode(s):         32-bit, 64-bit
  Byte Order:             Little Endian
CPU(s):                   4
  On-line CPU(s) list:    0-3
Vendor ID:                ARM
  Model name:             Cortex-A53
    Model:                4
    Thread(s) per core:   1
    Core(s) per cluster:  4
    Socket(s):            -
    Cluster(s):           1
    Stepping:             r0p4
    CPU(s) scaling MHz:   100%
    CPU max MHz:          1200.0000
    CPU min MHz:          600.0000
    BogoMIPS:             38.40
    Flags:                fp asimd evtstrm crc32 cpuid

lscpu -e=SCALMHZ%:

SCALMHZ%
    100%
    100%
    100%
    100%