diff options
Diffstat (limited to 'libpod/stats.go')
| -rw-r--r-- | libpod/stats.go | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/libpod/stats.go b/libpod/stats.go index b5d39240d..988aa4b5c 100644 --- a/libpod/stats.go +++ b/libpod/stats.go @@ -14,7 +14,9 @@ import ( "github.com/pkg/errors" ) -// GetContainerStats gets the running stats for a given container +// GetContainerStats gets the running stats for a given container. +// The previousStats is used to correctly calculate cpu percentages. You +// should pass nil if there is no previous stat for this container. func (c *Container) GetContainerStats(previousStats *define.ContainerStats) (*define.ContainerStats, error) { stats := new(define.ContainerStats) stats.ContainerID = c.ID() @@ -36,6 +38,14 @@ func (c *Container) GetContainerStats(previousStats *define.ContainerStats) (*de return stats, define.ErrCtrStateInvalid } + if previousStats == nil { + previousStats = &define.ContainerStats{ + // if we have no prev stats use the container start time as prev time + // otherwise we cannot correctly calculate the CPU percentage + SystemNano: uint64(c.state.StartedTime.UnixNano()), + } + } + cgroupPath, err := c.cGroupPath() if err != nil { return nil, err |