func GetStats(c *cgroups.Cgroup) (*cgroups.Stats, error) {
stats := cgroups.NewStats()
d, err := getCgroupData(c, 0)
if err != nil {
return nil, fmt.Errorf("getting CgroupData %s", err)
}
for sysname, sys := range subsystems {
path, err := d.path(sysname)
if err != nil {
// Don't fail if a cgroup hierarchy was not found, just skip this subsystem
if cgroups.IsNotFound(err) {
continue
}
return nil, err
}
if err := sys.GetStats(path, stats); err != nil {
return nil, err
}
}
return stats, nil
}
/*
* This would be nicer to get from the systemd API when accounting
* is enabled, but sadly there is no way to do that yet.
* The lack of this functionality in the API & the approach taken
* is guided by
* http://www.freedesktop.org/wiki/Software/systemd/ControlGroupInterface/#readingaccountinginformation.
*/
func GetStats(c *cgroups.Cgroup) (*cgroups.Stats, error) {
stats := cgroups.NewStats()
for sysname, sys := range subsystems {
subsystemPath, err := getSubsystemPath(c, sysname)
if err != nil {
// Don't fail if a cgroup hierarchy was not found, just skip this subsystem
if cgroups.IsNotFound(err) {
continue
}
return nil, err
}
if err := sys.GetStats(subsystemPath, stats); err != nil {
return nil, err
}
}
return stats, nil
}
Total 500`
servicedRecursiveContents = `8:0 Read 10
8:0 Write 40
8:0 Sync 20
8:0 Async 30
8:0 Total 50
Total 50`
queuedRecursiveContents = `8:0 Read 1
8:0 Write 4
8:0 Sync 2
8:0 Async 3
8:0 Total 5
Total 5`
)
var actualStats = *cgroups.NewStats()
func appendBlkioStatEntry(blkioStatEntries *[]cgroups.BlkioStatEntry, major, minor, value uint64, op string) {
*blkioStatEntries = append(*blkioStatEntries, cgroups.BlkioStatEntry{Major: major, Minor: minor, Value: value, Op: op})
}
func TestBlkioStats(t *testing.T) {
helper := NewCgroupTestUtil("blkio", t)
defer helper.cleanup()
helper.writeFileContents(map[string]string{
"blkio.io_service_bytes_recursive": serviceBytesRecursiveContents,
"blkio.io_serviced_recursive": servicedRecursiveContents,
"blkio.io_queued_recursive": queuedRecursiveContents,
"blkio.sectors_recursive": sectorsRecursiveContents,
})