cdbca4061b
Older versions of Go don't format comments, so committing this as
a separate commit, so that we can already make these changes before
we upgrade to Go 1.19.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 52c1a2fae8)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
64 lines
2.3 KiB
Go
64 lines
2.3 KiB
Go
package daemon // import "github.com/docker/docker/daemon"
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"time"
|
|
|
|
containertypes "github.com/docker/docker/api/types/container"
|
|
units "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
|
|
}
|
|
|
|
if !container.IsRunning() {
|
|
return nil, errNotRunning(container.ID)
|
|
}
|
|
|
|
if container.IsRestarting() {
|
|
return nil, errContainerIsRestarting(container.ID)
|
|
}
|
|
|
|
s, err := daemon.containerd.Summary(context.Background(), 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.KernelTime_100Ns + j.UserTime_100Ns) * 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
|
|
}
|