(1)  command end with show error msg.
[root@bx603 .libs]# xm vcpu-list vm1
Error: an integer is required
Usage: xm vcpu-list [<Domain>]

List the VCPUs for a domain or all domains.
[root@bx603 .libs]# ./virsh vcpuinfo vm1
error: Domain shut off, virtual CPUs not present.
error: GET operation failed: 500 status from xen daemon: /xend/domain/vm1?op=vcpuinfo:(xend.err 'an integer is required')

[root@bx603 .libs]# ./virsh vcpupin vm1 0 0,1
error: POST operation failed: xend_post: error from xen daemon: (xend.err "int() argument must be a string or a number, not 'NoneType'")

[root@bx603 .libs]# xm vcpu-list vm1
Error: an integer is required
Usage: xm vcpu-list [<Domain>]

List the VCPUs for a domain or all domains.
[root@bx603 .libs]# ./virsh vcpuinfo vm1
error: Domain shut off, virtual CPUs not present.
error: GET operation failed: 500 status from xen daemon: /xend/domain/vm1?op=vcpuinfo:(xend.err 'an integer is required')


(2)  command end normaly but can't set cpu affnity.
[root@bx603 .libs]# xm vcpu-list vm1
Name                              ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                               19     0     3   -b-       5.1 any cpu
vm1                               19     1     1   r--       4.2 any cpu
[root@bx603 .libs]# ./virsh vcpuinfo vm1
VCPU:           0
CPU:            2
State:          running
CPU time:       5.9s
CPU Affinity:   yyyy

VCPU:           1
CPU:            3
State:          idle
CPU time:       4.8s
CPU Affinity:   yyyy

[root@bx603 .libs]# ./virsh vcpupin vm1 0 0,1

[root@bx603 .libs]# echo $?
0
[root@bx603 .libs]# xm vcpu-list vm1
Name                              ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                               19     0     2   -b-       9.1 any cpu
vm1                               19     1     0   -b-       6.1 any cpu
[root@bx603 .libs]# ./virsh vcpuinfo vm1
VCPU:           0
CPU:            2
State:          idle
CPU time:       9.1s
CPU Affinity:   yyyy

VCPU:           1
CPU:            2
State:          idle
CPU time:       6.1s
CPU Affinity:   yyyy


(3)  command end with show error msg.
[root@bx603 .libs]# xm vcpu-list vm1
Error: an integer is required
Usage: xm vcpu-list [<Domain>]

List the VCPUs for a domain or all domains.
[root@bx603 .libs]# ./virsh vcpuinfo vm1
error: Domain shut off, virtual CPUs not present.
error: GET operation failed: 500 status from xen daemon: /xend/domain/vm1?op=vcpuinfo:(xend.err 'an integer is required')

[root@bx603 .libs]# ./virsh vcpupin vm1 0 0,1
error: POST operation failed: xend_post: error from xen daemon: (xend.err "int() argument must be a string or a number, not 'NoneType'")

[root@bx603 .libs]# echo $?
1
[root@bx603 .libs]# xm vcpu-list vm1
Error: an integer is required
Usage: xm vcpu-list [<Domain>]

List the VCPUs for a domain or all domains.
[root@bx603 .libs]# ./virsh vcpuinfo vm1
error: Domain shut off, virtual CPUs not present.
error: GET operation failed: 500 status from xen daemon: /xend/domain/vm1?op=vcpuinfo:(xend.err 'an integer is required')



(4)  command end normaly but can't set cpu affnity.
[root@bx603 .libs]# xm vcpu-list vm1
Name                              ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                               20     0     1   -b-       5.3 any cpu
vm1                               20     1     2   -b-       5.8 any cpu
[root@bx603 .libs]# ./virsh vcpuinfo vm1
VCPU:           0
CPU:            0
State:          idle
CPU time:       5.3s
CPU Affinity:   yyyy

VCPU:           1
CPU:            2
State:          idle
CPU time:       5.8s
CPU Affinity:   yyyy

[root@bx603 .libs]# ./virsh vcpupin vm1 0 0,1

[root@bx603 .libs]# echo $?
0
[root@bx603 .libs]# xm vcpu-list vm1
Name                              ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                               20     0     2   -b-       9.1 any cpu
vm1                               20     1     2   -b-       7.8 any cpu
[root@bx603 .libs]# ./virsh vcpuinfo vm1
VCPU:           0
CPU:            2
State:          idle
CPU time:       9.1s
CPU Affinity:   yyyy

VCPU:           1
CPU:            1
State:          idle
CPU time:       7.8s
CPU Affinity:   yyyy