(1)  command end normaly but can't set cpu affnity.

[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                                        0                   0.0 any cpu
[root@vmx07 .libs]# virsh vcpuinfo vm1
VCPU:           0
CPU:            -1
State:          offline
CPU Affinity:   yyyyyyyy

[root@vmx07 .libs]# virsh vcpupin vm1 0 0,1

[root@vmx07 .libs]# echo $?
0

[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
Error: Invalid argument.
Usage: xm vcpu-list [Domain, ...]

List the VCPUs for all/some domains.
[root@vmx07 .libs]# virsh vcpuinfo vm1
VCPU:           0
CPU:            -1
State:          offline
CPU Affinity:   --------


(2) command end normaly but can't set cpu affnity.
[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                                 22     0     3   r--      18.0 any cpu
[root@vmx07 .libs]# virsh vcpuinfo vm1
VCPU:           0
CPU:            0
State:          running
CPU time:       23.8s
CPU Affinity:   yyyyyyyy

[root@vmx07 .libs]# virsh vcpupin vm1 0 0,1

[root@vmx07 .libs]# echo $?
0
[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                                 22     0     2   r--      36.6 any cpu
[root@vmx07 .libs]# virsh vcpuinfo vm1
VCPU:           0
CPU:            0
State:          idle
CPU time:       39.9s
CPU Affinity:   yyyyyyyy


(3) command end with show error msg.
[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                                        0                   0.0 any cpu

[root@vmx07 .libs]# virsh vcpuinfo vm1
VCPU:           0
CPU:            -1
State:          offline
CPU Affinity:   yyyyyyyy


[root@vmx07 .libs]# virsh vcpupin vm1 0 0,1
error: POST operation failed: xend_post: error from xen daemon: (xend.err 'invalid literal for int(): [0')

[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                                        0                   0.0 any cpu

[root@vmx07 .libs]# virsh vcpuinfo vm1
VCPU:           0
CPU:            -1
State:          offline
CPU Affinity:   yyyyyyyy



(4) command end with show error msg.
[root@vmx07 .libs]# virsh start vm1
Domain vm1 started

[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                                 19     0     2   r--      21.4 any cpu
[root@vmx07 .libs]# virsh vcpupin vm1 0 0,1
error: POST operation failed: xend_post: error from xen daemon: (xend.err 'invalid literal for int(): [0')

[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                                 19     0     4   -b-      33.9 any cpu

[root@vmx07 .libs]# virsh vcpuinfo vm1
VCPU:           0
CPU:            0
State:          running
CPU time:       33.9s
CPU Affinity:   yyyyyyyy


(5)  command end normaly but can't set cpu affnity.
[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                                        0                   0.0 any cpu
[root@vmx07 .libs]# virsh vcpuinfo vm1
VCPU:           0
CPU:            -1
State:          offline
CPU Affinity:   yyyyyyyy

[root@vmx07 .libs]# virsh vcpupin vm1 0 0,1

[root@vmx07 .libs]# echo $?
0

[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
Error: Invalid argument.
Usage: xm vcpu-list [Domain, ...]

List the VCPUs for all/some domains.

[root@vmx07 .libs]# virsh vcpuinfo vm1
VCPU:           0
CPU:            -1
State:          offline
CPU Affinity:   --------


(6)  command end normaly but can't set cpu affnity.
[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                                 21     0     6   r--       3.6 any cpu
[root@vmx07 .libs]# virsh vcpuinfo vm1
VCPU:           0
CPU:            0
State:          running
CPU time:       18.9s
CPU Affinity:   yyyyyyyy

[root@vmx07 .libs]# virsh vcpupin vm1 0 0,1

[root@vmx07 .libs]# echo $?
0
[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                                 21     0     4   -b-      42.0 any cpu
[root@vmx07 .libs]# virsh vcpuinfo vm1
VCPU:           0
CPU:            7
State:          idle
CPU time:       42.0s
CPU Affinity:   yyyyyyyy


(7) command end normaly and set cpu affnity.
[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                                        0                   0.0 any cpu
[root@vmx07 .libs]# virsh vcpupin vm1 0 0,1

[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                                        0                   0.0 0-1

[root@vmx07 .libs]# virsh vcpuinfo vm1
VCPU:           0
CPU:            -1
State:          offline
CPU Affinity:   yy------



(8) command end normaly and set cpu affnity.
[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                                 20     0     1   r--      11.3 any cpu
[root@vmx07 .libs]# virsh vcpuinfo vm1
VCPU:           0
CPU:            6
State:          running
CPU time:       29.2s
CPU Affinity:   yyyyyyyy


[root@vmx07 .libs]# virsh vcpupin vm1 0 0,1

[root@vmx07 .libs]# echo $?
0
[root@vmx07 .libs]# xm vcpu-list vm1
Name                                ID  VCPU   CPU State   Time(s) CPU Affinity
vm1                                 20     0     1   -b-      42.0 0-1
[root@vmx07 .libs]# virsh vcpuinfo vm1
VCPU:           0
CPU:            0
State:          idle
CPU time:       42.0s
CPU Affinity:   yy------