1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253 |
- package daemon
- import (
- "errors"
- "fmt"
- "time"
- containertypes "github.com/docker/docker/api/types/container"
- "github.com/docker/go-units"
- )
- // ContainerTop handles `docker top` client requests.
- // Future considerations:
- // -- Windows users are far more familiar with CPU% total.
- // Further, users on Windows rarely see user/kernel CPU stats split.
- // The kernel returns everything in terms of 100ns. To obtain
- // CPU%, we could do something like docker stats does which takes two
- // samples, subtract the difference and do the maths. Unfortunately this
- // would slow the stat call down and require two kernel calls. So instead,
- // we do something similar to linux and display the CPU as combined HH:MM:SS.mmm.
- // -- Perhaps we could add an argument to display "raw" stats
- // -- "Memory" is an extremely overloaded term in Windows. Hence we do what
- // task manager does and use the private working set as the memory counter.
- // We could return more info for those who really understand how memory
- // management works in Windows if we introduced a "raw" stats (above).
- func (daemon *Daemon) ContainerTop(name string, psArgs string) (*containertypes.ContainerTopOKBody, error) {
- // It's not at all an equivalent to linux 'ps' on Windows
- if psArgs != "" {
- return nil, errors.New("Windows does not support arguments to top")
- }
- container, err := daemon.GetContainer(name)
- if err != nil {
- return nil, err
- }
- s, err := daemon.containerd.Summary(container.ID)
- if err != nil {
- return nil, err
- }
- procList := &containertypes.ContainerTopOKBody{}
- procList.Titles = []string{"Name", "PID", "CPU", "Private Working Set"}
- for _, j := range s {
- d := time.Duration((j.KernelTime100ns + j.UserTime100ns) * 100) // Combined time in nanoseconds
- procList.Processes = append(procList.Processes, []string{
- j.ImageName,
- fmt.Sprint(j.ProcessId),
- fmt.Sprintf("%02d:%02d:%02d.%03d", int(d.Hours()), int(d.Minutes())%60, int(d.Seconds())%60, int(d.Nanoseconds()/1000000)%1000),
- units.HumanSize(float64(j.MemoryWorkingSetPrivateBytes))})
- }
- return procList, nil
- }
|