CPU Performance Settings

The Rhino Pi IQ9N is equipped with an octa-core Kryo Gen 6 CPU, and the CPU operating mode can be adjusted according to power and performance requirements.

Hardware Parameters

Item	Parameter
CPU	Octa-core Kryo Gen 6 (Octa-core @ 2.36 GHz), DMIPS up to 227 K
GPU	Adreno 663 @ 800 MHz
NPU	100 TOPS

Viewing CPU Information

View the number of cores and the model:

cat /proc/cpuinfo

View the current operating frequency of each core (the value is in kHz):

cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq

View the maximum operating frequency (the value is in kHz):

cat /sys/devices/system/cpu/cpufreq/policy0/cpuinfo_max_freq
cat /sys/devices/system/cpu/cpufreq/policy4/cpuinfo_max_freq

In testing, both outputs are 2361600, that is, 2.36 GHz.

Viewing and Setting the Frequency Scaling Policy

The 8 CPU cores of the IQ9N are divided into two frequency scaling policy groups: policy0 (CPU 0-3) and policy4 (CPU 4-7), and must be specified separately when setting.

View the available frequency scaling policies:

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors

The device uses the schedutil policy by default; in testing the command above outputs powersave ondemand userspace performance schedutil.

View the current policy:

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

Set to performance priority mode:

sudo bash -c "echo performance > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor"
sudo bash -c "echo performance > /sys/devices/system/cpu/cpufreq/policy4/scaling_governor"

Set to power saving priority mode:

sudo bash -c "echo powersave > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor"
sudo bash -c "echo powersave > /sys/devices/system/cpu/cpufreq/policy4/scaling_governor"

Restore the default balanced mode:

sudo bash -c "echo schedutil > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor"
sudo bash -c "echo schedutil > /sys/devices/system/cpu/cpufreq/policy4/scaling_governor"

Note

The settings above are not retained after a reboot. At boot, the sysfsutils service writes schedutil to policy0 and policy4 according to /etc/sysfs.d/50-dragonwing-defaults.conf; modify that configuration file if you need the change to persist.

Viewing Temperature and Load

View the temperature:

cat /sys/class/thermal/thermal_zone*/temp

The output value is in millidegrees Celsius, for example 52500 means 52.5 °C. The device contains multiple temperature sensors (thermal zones; 62 in total on this device in testing), which can be read individually.

View the system load:

uptime

View process resource usage:

top

Power Consumption Reference

State	Power Consumption
Standby	5W
AI workload	20W
Maximum power consumption	50W

Notes

• Performance priority mode increases power consumption and heat generation; ensure good cooling conditions during long periods of high load. For how to connect the fan, see Fan Connector.