cpu.Percent is less then process.CPUPercent

[soluchok]

As I understand, cpu.Percent shows the CPU usage of the entire system, while process.CPUPercent shows the CPU usage of a specific process. How is it possible that cpu.Percent returns 2% but process.CPUPercent returns 4%? Am I missing something here?

import "github.com/shirou/gopsutil/v4/cpu"
import "github.com/shirou/gopsutil/v4/process"

proc, _ := process.NewProcess(int32(os.Getpid()))
usage, _ := proc.CPUPercent() // usage is 4%

cpuPercent, err := cpu.Percent(0, false) // cpuPercent is 2%