one cpu full, but show 200% ?

[baiwfg2]

OS: Linux fedora 5.15.16-100.fc34.x86_64 #1 SMP , running on virtualbox with 2 CPUs
htop version : 3.2

I have a simple program:

#include<stdio.h>
int globalv;
void dosth()
{
  globalv++;
}
int main()
{
  globalv = 0;
  for(;;)
    dosth();
  return 0;
}

When I run it, it definitely consume one core , but why htop show 200% usage ?

[fasterit]

Fedora 34 is long out of support
htop 3.2.2 on Fedora 37 does not show that behavior
Neither does git tip, so cannot reproduce

[baiwfg2]

Ok. I also verify it in kernel 4.19, it's ok.

On fedora 36, kernel 5.17.7, it shows 120% CPU usage instead of 200%, which is also not correct.

Suspect whether it's related to virtualbox vm.

[baiwfg2]

verified fedora 37 is ok.