// NetworkUsed returns a map of network utilization for processes in the cgroup.
func (c *Cgroup) NetworkUsed(ifs []*net.Interface) (nuMap map[string]NetUsage, err error) {
// Out usage map.
nuMap = make(map[string]NetUsage, len(ifs))
for _, intf := range ifs {
var err error
sysDir := fmt.Sprintf("/sys/class/net/%s/statistics", intf.Name)
txFile := filepath.Join(sysDir, "tx_bytes")
rxFile := filepath.Join(sysDir, "rx_bytes")
nu := NetUsage{}
nu.TxBytes, err = proc.ReadInt64(txFile)
if err != nil {
return nil, err
}
nu.RxBytes, err = proc.ReadInt64(rxFile)
if err != nil {
return nil, err
}
nuMap[intf.Name] = nu
}
return nuMap, nil
}
// MemoryUsed returns the total number of bytes used by processes in the cgroup.
func (c *Cgroup) MemoryUsed() (int64, error) {
return proc.ReadInt64(filepath.Join(cgroupsDir, "memory", c.name, "memory.usage_in_bytes"))
}
// CPUUsed returns the total amount of cpu used by processes in the cgroup.
func (c *Cgroup) CPUUsed() (i int64, err error) {
return proc.ReadInt64(filepath.Join(cgroupsDir, "cpuacct", c.name, "cpuacct.usage"))
}