github.com/wozhu6104/docker@v20.10.10+incompatible/daemon/top_windows.go (about) 1 package daemon // import "github.com/docker/docker/daemon" 2 3 import ( 4 "context" 5 "errors" 6 "fmt" 7 "time" 8 9 containertypes "github.com/docker/docker/api/types/container" 10 units "github.com/docker/go-units" 11 ) 12 13 // ContainerTop handles `docker top` client requests. 14 // Future considerations: 15 // -- Windows users are far more familiar with CPU% total. 16 // Further, users on Windows rarely see user/kernel CPU stats split. 17 // The kernel returns everything in terms of 100ns. To obtain 18 // CPU%, we could do something like docker stats does which takes two 19 // samples, subtract the difference and do the maths. Unfortunately this 20 // would slow the stat call down and require two kernel calls. So instead, 21 // we do something similar to linux and display the CPU as combined HH:MM:SS.mmm. 22 // -- Perhaps we could add an argument to display "raw" stats 23 // -- "Memory" is an extremely overloaded term in Windows. Hence we do what 24 // task manager does and use the private working set as the memory counter. 25 // We could return more info for those who really understand how memory 26 // management works in Windows if we introduced a "raw" stats (above). 27 func (daemon *Daemon) ContainerTop(name string, psArgs string) (*containertypes.ContainerTopOKBody, error) { 28 // It's not at all an equivalent to linux 'ps' on Windows 29 if psArgs != "" { 30 return nil, errors.New("Windows does not support arguments to top") 31 } 32 33 container, err := daemon.GetContainer(name) 34 if err != nil { 35 return nil, err 36 } 37 38 if !container.IsRunning() { 39 return nil, errNotRunning(container.ID) 40 } 41 42 if container.IsRestarting() { 43 return nil, errContainerIsRestarting(container.ID) 44 } 45 46 s, err := daemon.containerd.Summary(context.Background(), container.ID) 47 if err != nil { 48 return nil, err 49 } 50 procList := &containertypes.ContainerTopOKBody{} 51 procList.Titles = []string{"Name", "PID", "CPU", "Private Working Set"} 52 53 for _, j := range s { 54 d := time.Duration((j.KernelTime_100Ns + j.UserTime_100Ns) * 100) // Combined time in nanoseconds 55 procList.Processes = append(procList.Processes, []string{ 56 j.ImageName, 57 fmt.Sprint(j.ProcessID), 58 fmt.Sprintf("%02d:%02d:%02d.%03d", int(d.Hours()), int(d.Minutes())%60, int(d.Seconds())%60, int(d.Nanoseconds()/1000000)%1000), 59 units.HumanSize(float64(j.MemoryWorkingSetPrivateBytes))}) 60 } 61 62 return procList, nil 63 }