17.3.1. Performing a Core Dump
You can use xm to perform a memory dump of an
existing virtual machine.
xm dump-core [-C] [domain-id]
This command dumps the virtual machine's memory to the xendump
file located in the /var/xen/dump/ directory. You can terminate the virtual machine
by including the -C option.
17.3.3. Displaying Domain States
You can use xm to display the domain activity states of one
or more domains:
xm list [domain-id] [ ——long | ——label]
You can specify a specific domain(s) by name (s). The
[——long] option provides a more detailed
breakdown of the domain you specified. The [——label]
domain adds an additional column that displays label status. The
outputs displays:
Name ID Mem(MiB) VCPUs State Time Label
————————————————
Domain0 0 927 8 r—————— 204.9 INACTIVE
Domain202 1 927 8 s—————— 205.0/command ACTIVE
DomainQ/A 2 927 8 b—————— INACTIVE
Domain9600 3 927 8 c—————— 205.1 ACTIVE
Here are the six domain states per VCPU:
| State |
Description |
|
running
|
lists domains currently active on a CPU
|
|
blocked
|
lists domains that are blocked (a domain becomes blocked when the vcpu is
awaiting for an external event to happen)
|
|
paused
|
lists domains that are suspended
|
|
shutdown
|
lists domains that are in process of shutting down
|
|
shutoff
|
lists domains that are completely down.
|
|
crashed
|
lists domains that are crashed
|
|
inactive
|
lists domains that are inactive instances
|
|
——all
|
lists domains that are both active and inactive vcpu instances
|
Table 17.3. The Domain States
