cpu frequency

sudo grubby --update-kernel=/boot/vmlinuz-6.6.78-rt51 --args="intel_pstate=passive amd_pstate=passive"

1grep -E '^(proccesor|cpu MHz)' /proc/cpuinfo

sudo  echo 1 | sudo tee /sys/devices/system/cpu/intel_pstate/no_turbo

echo userspace | sudo tee /sys/devices/system/cpu/cpufreq/policy42/scaling_governor

awk -v cpu=42 '
  $1 == "processor" && $3 == cpu { p=1 }
  p && $1 == "cpu" && $2 == "MHz" { print "CPU " cpu ": " $4 " MHz"; exit }
' /proc/cpuinfo

# THIS DOES NOT WORK
echo 2900000 | sudo tee /sys/devices/system/cpu/cpufreq/policy42/scaling_setspeed

# THIS IS THE WAY
sudo tee /sys/devices/system/cpu/cpufreq/policy42/scaling_min_freq <<<2600000
sudo tee /sys/devices/system/cpu/cpufreq/policy42/scaling_max_freq <<<2600000

 cat /sys/devices/system/cpu/intel_pstate/status