Вопросы Теги

是否可以在Linux系统上进行部分超线程？

我有一台具有2 * 14内核且启用了超线程的服务器。 这意味着我有（2 * 14 * 2 = 28 * 2）个56个vCPU。

[root@supervision1 /]# dmidecode -t 4 | egrep 'Socket Designation|Count'
    Socket Designation: SOCKET 0
    Core Count: 14
    Thread Count: 28
    Socket Designation: SOCKET 1
    Core Count: 14
    Thread Count: 28
[root@supervision1 /]# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                56
On-line CPU(s) list:   0-55
Thread(s) per core:    2
Core(s) per socket:    14
Socket(s):             2
NUMA node(s):          2
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 79
Model name:            Intel(R) Xeon(R) CPU E5-2680 v4 @ 2.40GHz
Stepping:              1
CPU MHz:               1204.980
CPU max MHz:           3300.0000
CPU min MHz:           1200.0000
BogoMIPS:              4788.62
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              35840K
NUMA node0 CPU(s):     0-13,28-41
NUMA node1 CPU(s):     14-27,42-55
Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb cat_l3 cdp_l3 intel_ppin intel_pt tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm rdt_a rdseed adx smap xsaveopt cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts

[root@supervision1 /]# virsh capabilities | grep 'cell\|cpu'
    <cpu>
    </cpu>
      <cells num='2'>
        <cell id='0'>
          <cpus num='28'>
            <cpu id='0' socket_id='0' core_id='0' siblings='0,28'/>
            <cpu id='1' socket_id='0' core_id='1' siblings='1,29'/>
            <cpu id='2' socket_id='0' core_id='2' siblings='2,30'/>
            <cpu id='3' socket_id='0' core_id='3' siblings='3,31'/>
            <cpu id='4' socket_id='0' core_id='4' siblings='4,32'/>
            <cpu id='5' socket_id='0' core_id='5' siblings='5,33'/>
            <cpu id='6' socket_id='0' core_id='6' siblings='6,34'/>
            <cpu id='7' socket_id='0' core_id='8' siblings='7,35'/>
            <cpu id='8' socket_id='0' core_id='9' siblings='8,36'/>
            <cpu id='9' socket_id='0' core_id='10' siblings='9,37'/>
            <cpu id='10' socket_id='0' core_id='11' siblings='10,38'/>
            <cpu id='11' socket_id='0' core_id='12' siblings='11,39'/>
            <cpu id='12' socket_id='0' core_id='13' siblings='12,40'/>
            <cpu id='13' socket_id='0' core_id='14' siblings='13,41'/>
            <cpu id='28' socket_id='0' core_id='0' siblings='0,28'/>
            <cpu id='29' socket_id='0' core_id='1' siblings='1,29'/>
            <cpu id='30' socket_id='0' core_id='2' siblings='2,30'/>
            <cpu id='31' socket_id='0' core_id='3' siblings='3,31'/>
            <cpu id='32' socket_id='0' core_id='4' siblings='4,32'/>
            <cpu id='33' socket_id='0' core_id='5' siblings='5,33'/>
            <cpu id='34' socket_id='0' core_id='6' siblings='6,34'/>
            <cpu id='35' socket_id='0' core_id='8' siblings='7,35'/>
            <cpu id='36' socket_id='0' core_id='9' siblings='8,36'/>
            <cpu id='37' socket_id='0' core_id='10' siblings='9,37'/>
            <cpu id='38' socket_id='0' core_id='11' siblings='10,38'/>
            <cpu id='39' socket_id='0' core_id='12' siblings='11,39'/>
            <cpu id='40' socket_id='0' core_id='13' siblings='12,40'/>
            <cpu id='41' socket_id='0' core_id='14' siblings='13,41'/>
          </cpus>
        </cell>
        <cell id='1'>
          <cpus num='28'>
            <cpu id='14' socket_id='1' core_id='0' siblings='14,42'/>
            <cpu id='15' socket_id='1' core_id='1' siblings='15,43'/>
            <cpu id='16' socket_id='1' core_id='2' siblings='16,44'/>
            <cpu id='17' socket_id='1' core_id='3' siblings='17,45'/>
            <cpu id='18' socket_id='1' core_id='4' siblings='18,46'/>
            <cpu id='19' socket_id='1' core_id='5' siblings='19,47'/>
            <cpu id='20' socket_id='1' core_id='6' siblings='20,48'/>
            <cpu id='21' socket_id='1' core_id='8' siblings='21,49'/>
            <cpu id='22' socket_id='1' core_id='9' siblings='22,50'/>
            <cpu id='23' socket_id='1' core_id='10' siblings='23,51'/>
            <cpu id='24' socket_id='1' core_id='11' siblings='24,52'/>
            <cpu id='25' socket_id='1' core_id='12' siblings='25,53'/>
            <cpu id='26' socket_id='1' core_id='13' siblings='26,54'/>
            <cpu id='27' socket_id='1' core_id='14' siblings='27,55'/>
            <cpu id='42' socket_id='1' core_id='0' siblings='14,42'/>
            <cpu id='43' socket_id='1' core_id='1' siblings='15,43'/>
            <cpu id='44' socket_id='1' core_id='2' siblings='16,44'/>
            <cpu id='45' socket_id='1' core_id='3' siblings='17,45'/>
            <cpu id='46' socket_id='1' core_id='4' siblings='18,46'/>
            <cpu id='47' socket_id='1' core_id='5' siblings='19,47'/>
            <cpu id='48' socket_id='1' core_id='6' siblings='20,48'/>
            <cpu id='49' socket_id='1' core_id='8' siblings='21,49'/>
            <cpu id='50' socket_id='1' core_id='9' siblings='22,50'/>
            <cpu id='51' socket_id='1' core_id='10' siblings='23,51'/>
            <cpu id='52' socket_id='1' core_id='11' siblings='24,52'/>
            <cpu id='53' socket_id='1' core_id='12' siblings='25,53'/>
            <cpu id='54' socket_id='1' core_id='13' siblings='26,54'/>
            <cpu id='55' socket_id='1' core_id='14' siblings='27,55'/>
          </cpus>
        </cell>
      </cells>
      <bank id='0' level='3' type='both' size='35' unit='MiB' cpus='0-13,28-41'/>
      <bank id='1' level='3' type='both' size='35' unit='MiB' cpus='14-27,42-55'/>
      <cpuselection/>
      <cpuselection/>

我在此虚拟机管理程序上运行了2个VM：

  • vm1和12个vCPU
  • vm2和6个vCPU

我没有 配置任何CPU固定（不需要）。 在VM1和VM2的某些vcpus信息下面

[root@supervision1 /]# virsh vcpupin vm1
VCPU: CPU Affinity
----------------------------------
   0: 0-55
   1: 0-55
   2: 0-55
   3: 0-55
   4: 0-55
   5: 0-55
   6: 0-55
   7: 0-55
   8: 0-55
   9: 0-55
  10: 0-55
  11: 0-55

[root@supervision1 /]# virsh vcpupin vm2
VCPU: CPU Affinity
----------------------------------
   0: 0-55
   1: 0-55
   2: 0-55
   3: 0-55
   4: 0-55
   5: 0-55

现在，我必须部署一个新的VM（vm3），该虚拟机需要以下内容（VM软件供应商的要求）：

  • 禁用超级头功能
  • 4个CPU带有CPU 固定

我该怎么办？ isolcpu 似乎已弃用或不建议使用。

  • VCPUPIN： 如果在VM3 XML定义中使用vcpupin，我会看到CPU固定可以，但是这些CPU并未从其他VM vCPU中排除。
  [root @ supervision1 / /]＃virsh dumpxml vm3 |  grep cpu
   4 
  
  
  
  
  
  
  
  

 [root @ supervision1 /]＃virsh vcpupin vm3
VCPU：CPU关联性
 ----------------------------------
  0：0
  1：1
  2：2
  3：3

即使我设法将这些vCPU限制为VM3，也不会将对应的同级兄弟（28、29、30、31）与VM1和VM2隔离开。 或者我可以将vCPU0固定到cpuset 0,28，将vCPU1固定到cpuset 1,28，等等...但是它们不会与VM1和VM2隔离（具有像行为这样的超线程禁用功能...）

我想在那里 是我不知道的其他选项或参数吗？ 任何建议或帮助将不胜感激:-)也许我不能对这3个VM使用相同的管理程序？

亲切的问候，

Emmanuel

0
задан 8 November 2019 в 13:27
1 ответ

Я нашел способ делать то, что искал, хотя он не очень хороший и масштабируемый. Я просто прикрепил vCPU VM3 к 4 последним процессорам (4 пары братьев и сестер):

[root@supervision1 ~]# virsh vcpupin vm3
VCPU: CPU Affinity
----------------------------------
   0: 24,52
   1: 25,53
   2: 26,54
   3: 27,55

[root@supervision1 ~]# virsh dumpxml vm3 | grep cpu
  <vcpu placement='static'>4</vcpu>
  <cputune>
    <vcpupin vcpu='0' cpuset='24,52'/>
    <vcpupin vcpu='1' cpuset='25,53'/>
    <vcpupin vcpu='2' cpuset='26,54'/>
    <vcpupin vcpu='3' cpuset='27,55'/>
    <emulatorpin cpuset='0-23,28-51'/>
  </cputune>
  <cpu>
  </cpu>

Затем мне нужно было изменить определение VM1 и VM2 (что не так приятно...), чтобы использовать только другие процессоры (0-23,28-51 братьев и сестер)

[root@supervision1 ~]# virsh vcpupin vm1
VCPU: CPU Affinity
----------------------------------
   0: 0-23,28-51
   1: 0-23,28-51
   2: 0-23,28-51
   3: 0-23,28-51
   4: 0-23,28-51
   5: 0-23,28-51
   6: 0-23,28-51
   7: 0-23,28-51
   8: 0-23,28-51
   9: 0-23,28-51
  10: 0-23,28-51
  11: 0-23,28-51

[root@supervision1 ~]# virsh vcpupin vm2
VCPU: CPU Affinity
----------------------------------
   0: 0-23,28-51
   1: 0-23,28-51
   2: 0-23,28-51
   3: 0-23,28-51
   4: 0-23,28-51
   5: 0-23,28-51
[root@supervision1 ~]# virsh dumpxml vm1| grep cpu
  <vcpu placement='static'>12</vcpu>
  <cputune>
    <vcpupin vcpu='0' cpuset='0-23,28-51'/>
    <vcpupin vcpu='1' cpuset='0-23,28-51'/>
    <vcpupin vcpu='2' cpuset='0-23,28-51'/>
    <vcpupin vcpu='3' cpuset='0-23,28-51'/>
    <vcpupin vcpu='4' cpuset='0-23,28-51'/>
    <vcpupin vcpu='5' cpuset='0-23,28-51'/>
    <vcpupin vcpu='6' cpuset='0-23,28-51'/>
    <vcpupin vcpu='7' cpuset='0-23,28-51'/>
    <vcpupin vcpu='8' cpuset='0-23,28-51'/>
    <vcpupin vcpu='9' cpuset='0-23,28-51'/>
    <vcpupin vcpu='10' cpuset='0-23,28-51'/>
    <vcpupin vcpu='11' cpuset='0-23,28-51'/>
    <emulatorpin cpuset='0-23,28-51'/>
  </cputune>
  <cpu mode='custom' match='exact' check='full'>
  </cpu>
[root@supervision1 ~]# virsh dumpxml vm2| grep cpu
  <vcpu placement='static'>6</vcpu>
  <cputune>
    <vcpupin vcpu='0' cpuset='0-23,28-51'/>
    <vcpupin vcpu='1' cpuset='0-23,28-51'/>
    <vcpupin vcpu='2' cpuset='0-23,28-51'/>
    <vcpupin vcpu='3' cpuset='0-23,28-51'/>
    <vcpupin vcpu='4' cpuset='0-23,28-51'/>
    <vcpupin vcpu='5' cpuset='0-23,28-51'/>
    <emulatorpin cpuset='0-23,28-51'/>
  </cputune>
  <cpu mode='custom' match='exact' check='full'>
  </cpu>

NB: я также установил эмуляторный шпильку, чтобы использовать процессоры, не используемые VM3 По крайней мере, я думаю, что это ответ на мой вопрос. Если у кого-нибудь есть идея получше, или замечания, я буду рад прочитать!

.
0
ответ дан 5 December 2019 в 00:02

Теги

Похожие вопросы