Created attachment 1933987 [details]
libvirt domain xml

Description of problem:

The information which CPUs and their hyperthread share which cache seems to be wrong in the guest.


Version-Release number of selected component (if applicable):

oc version
Client Version: 4.10.45
Server Version: 4.10.45
Kubernetes Version: v1.23.12+8a6bfe4


How reproducible:

Guest

# lscpu --all --extended

CPU NODE SOCKET CORE L1d:L1i:L2:L3 ONLINE
0   0    0      0    0:0:0:0       yes
1   0    0      0    1:1:0:0       yes
2   0    0      1    2:2:1:0       yes
3   0    0      1    3:3:1:0       yes
4   0    0      2    4:4:2:0       yes
5   0    0      2    5:5:2:0       yes

Dom XML

    <vcpupin vcpu='0' cpuset='1'/>
    <vcpupin vcpu='1' cpuset='113'/>
    <vcpupin vcpu='2' cpuset='2'/>
    <vcpupin vcpu='3' cpuset='114'/>
    <vcpupin vcpu='4' cpuset='3'/>
    <vcpupin vcpu='5' cpuset='115'/>


Bare metal host

lscpu --all --extended
CPU NODE SOCKET CORE L1d:L1i:L2:L3 ONLINE MAXMHZ    MINMHZ
0   0    0      0    0:0:0:0       yes    4300.0000 1000.0000
1   0    0      1    1:1:1:0       yes    4300.0000 1000.0000
2   0    0      2    2:2:2:0       yes    4300.0000 1000.0000
3   0    0      3    3:3:3:0       yes    4300.0000 1000.0000
...
112 0    0      0    0:0:0:0       yes    4300.0000 1000.0000
113 0    0      1    1:1:1:0       yes    4300.0000 1000.0000
114 0    0      2    2:2:2:0       yes    4300.0000 1000.0000
115 0    0      3    3:3:3:0       yes    4300.0000 1000.0000


Note that on the HW the it's indicated that a CPU and it's Hyperthread share all caches (e.g. cpu1 and cpu113 have 1:1:1:0).

In the guest the coresponding cpu0 and cpu1 have a different line there 0:0:0:0  
 vs 1:1:0:0.

Now I can't tell if thats a real issue or just a cosmetic thing but it's definately different and should be corrected.