How to verify that vcpupinning works correctly and why do virsh vcpuinfo and taskset show different information in Red Hat OpenStack Platform?

Issue

How to verify that vcpupinning works correctly and why do virsh vcpuingo and taskset show different information?

taskset and vcpupin / vcpuinfo show different results in a lab. Which command shows the correct output?

[root@overcloud-compute-0 ~]#  virsh list | awk '{print $2}' | xargs -I {} bash -c "echo {}; virsh vcpupin {}" 2>/dev/null
instance-00000060
VCPU: CPU Affinity
----------------------------------
   0: 3-11

instance-00000066
VCPU: CPU Affinity
----------------------------------
   0: 0
   1: 1
   2: 2

instance-0000006c
VCPU: CPU Affinity
----------------------------------
   0: 3-11
   1: 3-11
   2: 3-11
   3: 3-11

[root@overcloud-compute-0 ~]#  virsh list | awk '{print $2}' | xargs -I {} bash -c "echo {}; virsh vcpuinfo {}" 2>/dev/null
Name

instance-00000060
VCPU:           0
CPU:            3
State:          running
CPU time:       1.7s
CPU Affinity:   ---yyyyyyyyy

instance-00000066
VCPU:           0
CPU:            0
State:          running
CPU time:       1.6s
CPU Affinity:   y-----------

VCPU:           1
CPU:            1
State:          running
CPU time:       0.4s
CPU Affinity:   -y----------

VCPU:           2
CPU:            2
State:          running
CPU time:       0.2s
CPU Affinity:   --y---------

instance-0000006c
VCPU:           0
CPU:            3
State:          running
CPU time:       1.5s
CPU Affinity:   ---yyyyyyyyy

VCPU:           1
CPU:            4
State:          running
CPU time:       0.8s
CPU Affinity:   ---yyyyyyyyy

VCPU:           2
CPU:            5
State:          running
CPU time:       0.1s
CPU Affinity:   ---yyyyyyyyy

VCPU:           3
CPU:            6
State:          running
CPU time:       0.1s
CPU Affinity:   ---yyyyyyyyy

VCPU:           4
CPU:            7
State:          running
CPU time:       0.2s
CPU Affinity:   ---yyyyyyyyy


[root@overcloud-compute-0 ~]# for i in `pgrep qemu-kvm` ; do taskset -p $i ; done
pid 31883's current affinity mask: ff0
pid 32074's current affinity mask: ff0
pid 32246's current affinity mask: ff0