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17.6.

  2. # virt-xml testguest1 --edit --cpu host-model
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17.6.1. 
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重要

17.6.2. 
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  • # virsh vcpucount testguest
maximum      config         4
maximum      live           2
current      config         2
current      live           1
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  1. # virsh setvcpus testguest 8 --maximum --config
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    • # virsh setvcpus testguest 4 --live
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    • # virsh setvcpus testguest 1 --config
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  • # virsh vcpucount testguest
maximum      config         8
maximum      live           4
current      config         1
current      live           4
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17.6.3. 
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  3. View larger image

    [D]

    • 注意

  2. 注意

17.6.4. 
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  • # virsh nodeinfo
CPU model:           x86_64
CPU(s):              48
CPU frequency:       1200 MHz
CPU socket(s):       1
Core(s) per socket:  12
Thread(s) per core:  2
NUMA cell(s):        2
Memory size:         67012964 KiB
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  • # yum install numactl
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  • # virt-xml testguest5 --edit --vcpus placement=auto
# virt-xml testguest5 --edit --numatune mode=preferred
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  • # echo 1 > /proc/sys/kernel/numa_balancing
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  • # systemctl start numad
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  1. # numactl --hardware

available: 2 nodes (0-1)
node 0 size: 18156 MB
node 0 free: 9053 MB
node 1 size: 18180 MB
node 1 free: 6853 MB
node distances:
node   0   1
  0:  10  20
  1:  20  10
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  2. # virsh edit <testguest6>

<domain type='kvm'>
  <name>testguest6</name>
  ...
  <vcpu placement='static'>16</vcpu>
  ...
  <cpu ...>
    <numa>
      <cell id='0' cpus='0-7' memory='16' unit='GiB'/>
      <cell id='1' cpus='8-15' memory='16' unit='GiB'/>
    </numa>
  ...
</domain>
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注意

17.6.5. 
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  1. # lscpu -p=node,cpu

Node,CPU
0,0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
1,0
1,1
1,2
1,3
1,4
1,5
1,6
1,7
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  2. # lscpu -p=node,cpu

Node,CPU
0,0
0,1
0,2
0,3
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  3. # virsh vcpupin testguest6 0 1
# virsh vcpupin testguest6 1 3
# virsh vcpupin testguest6 2 5
# virsh vcpupin testguest6 3 7
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  4. # virsh vcpupin testguest6
VCPU   CPU Affinity
----------------------
0      1
1      3
2      5
3      7
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  5. # virsh emulatorpin testguest6 2,4
# virsh emulatorpin testguest6
emulator: CPU Affinity
----------------------------------
       *: 2,4
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17.6.6. 
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  1. # virsh schedinfo <vm_name>

Scheduler      : posix
cpu_shares     : 0
vcpu_period : 0
vcpu_quota : 0
emulator_period: 0
emulator_quota : 0
global_period  : 0
global_quota   : 0
iothread_period: 0
iothread_quota : 0
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    1. # virsh schedinfo <vm_name> --set vcpu_period=100000
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    2. # virsh schedinfo <vm_name> --set vcpu_quota=50000
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  • # virsh schedinfo <vm_name>

Scheduler      : posix
cpu_shares     : 2048
vcpu_period    : 100000
vcpu_quota     : 50000
...
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17.6.7. 
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  1. # virsh schedinfo <vm_name>

Scheduler      : posix
cpu_shares : 1024
vcpu_period    : 0
vcpu_quota     : 0
emulator_period: 0
emulator_quota : 0
global_period  : 0
global_quota   : 0
iothread_period: 0
iothread_quota : 0
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  2. # virsh schedinfo <vm_name> --set cpu_shares=2048

Scheduler      : posix
cpu_shares : 2048
vcpu_period    : 0
vcpu_quota     : 0
emulator_period: 0
emulator_quota : 0
global_period  : 0
global_quota   : 0
iothread_period: 0
iothread_quota : 0
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17.6.8. 
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    • # systemctl stop ksm
# systemctl stop ksmtuned
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    • # systemctl disable ksm
Removed /etc/systemd/system/multi-user.target.wants/ksm.service.
# systemctl disable ksmtuned
Removed /etc/systemd/system/multi-user.target.wants/ksmtuned.service.
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      注意

      # echo 2 > /sys/kernel/mm/ksm/run
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