podman

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//go:build !remote && (linux || freebsd)
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package libpod
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import (
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	"fmt"
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	"github.com/containers/podman/v5/libpod/define"
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)
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// GetContainerStats gets the running stats for a given container.
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// The previousStats is used to correctly calculate cpu percentages. You
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// should pass nil if there is no previous stat for this container.
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func (c *Container) GetContainerStats(previousStats *define.ContainerStats) (*define.ContainerStats, error) {
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	stats := new(define.ContainerStats)
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	stats.ContainerID = c.ID()
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	stats.Name = c.Name()
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	if c.config.NoCgroups {
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		return nil, fmt.Errorf("cannot run top on container %s as it did not create a cgroup: %w", c.ID(), define.ErrNoCgroups)
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	}
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	if !c.batched {
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		c.lock.Lock()
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		defer c.lock.Unlock()
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		if err := c.syncContainer(); err != nil {
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			return stats, err
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		}
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	}
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	// returns stats with the fields' default values respective of their type
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	if c.state.State != define.ContainerStateRunning && c.state.State != define.ContainerStatePaused {
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		return stats, nil
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	}
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	if previousStats == nil {
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		previousStats = &define.ContainerStats{
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			// if we have no prev stats use the container start time as prev time
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			// otherwise we cannot correctly calculate the CPU percentage
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			SystemNano: uint64(c.state.StartedTime.UnixNano()),
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		}
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	}
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	netStats, err := getContainerNetIO(c)
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	if err != nil {
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		return nil, err
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	}
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	stats.Network = netStats
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	if err := c.getPlatformContainerStats(stats, previousStats); err != nil {
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		return nil, err
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	}
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	return stats, nil
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}
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// GetOnlineCPUs returns the number of online CPUs as set in the container cpu-set using sched_getaffinity
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func GetOnlineCPUs(container *Container) (int, error) {
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	return getOnlineCPUs(container)
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}
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