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package libpod
import (
"fmt"
"unsafe"
"github.com/containers/podman/v4/libpod/define"
"golang.org/x/sys/unix"
)
func (r *Runtime) setPlatformHostInfo(info *define.HostInfo) error {
return nil
}
func timeToPercent(time uint64, total uint64) float64 {
return 100.0 * float64(time) / float64(total)
}
// getCPUUtilization Returns a CPUUsage object that summarizes CPU
// usage for userspace, system, and idle time.
func getCPUUtilization() (*define.CPUUsage, error) {
buf, err := unix.SysctlRaw("kern.cp_time")
if err != nil {
return nil, fmt.Errorf("reading sysctl kern.cp_time: %w", err)
}
var total uint64 = 0
var times [unix.CPUSTATES]uint64
for i := 0; i < unix.CPUSTATES; i++ {
val := *(*uint64)(unsafe.Pointer(&buf[8*i]))
times[i] = val
total += val
}
return &define.CPUUsage{
UserPercent: timeToPercent(times[unix.CP_USER], total),
SystemPercent: timeToPercent(times[unix.CP_SYS], total),
IdlePercent: timeToPercent(times[unix.CP_IDLE], total),
}, nil
}
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