Confusion with CPU governor

[mcandre]

Hi,

I am confused about the state of the CPU governor. nanobench reports:

Warning, results might be unstable:

• CPU governor is '' but should be 'performance'
• Turbo is enabled, CPU frequency will fluctuate

But I have the following configuration for my CPU frequency:

$ grep GOVERNOR /etc/init.d/cpufrequtils
#       GOVERNOR="ondemand"                                                                                                                        
GOVERNOR="performance"                                                                                                                             
        if [ -f $info ] && grep -q "\<$GOVERNOR\>" $info ; then                                                                                    
if [ -n "$GOVERNOR" ] ; then                                                                                                                       
        CPUFREQ_OPTIONS="$CPUFREQ_OPTIONS --governor $GOVERNOR"                                                                                    
                log_action_begin_msg "$DESC: Setting $GOVERNOR CPUFreq governor"

I have disabled the systemd service for ondemand. I regenerated initramfs and rebooted.

Is nanobench correctly detecting the CPU governor state?

Maybe nanobench is mistaken in its parsing. This is an EC2 instance virtual machine, I do not truly know if CPU governor customization is able to change. What do you think about hiding this message on virtual machines?

nanobench 4.3.0, Ubuntu 20.04 Focal Fossa, EC2 t2.micro.

[mcandre]

Update: I now see the NANOBENCH_SUPPRESS_WARNINGS environment variable option. I am configuring this on my EC2 instance to hide the messages.