Re: [Starlingx-discuss] cpu mode

18 Jan 2019

      i know, i know, i shouldnt spam this list ;)
but after some tests i have tried to change the nova-conf (/etc/nova/nova.conf) and edit some values:

[default]
libvirt_cpu_mode = "custom" // none -> costom
libvirt_cpu_model = "EPYC-IBRS" // insert this line

[libvirt]
cpu_mode = "custom" // none -> custom
cpu_model = "EPYC-IBRS" // insert this line

but after reboot my compute-node, some auto-config logic is reconfigure this config-file and "[libvirt]" part the option "cpu_mode" is back to "none" and "cpu_model" is deleted completly :(

is there any way to prevent or configure this auto-config?

volker...
________________________________________
Von: von Hoesslin, Volker [Volker.Hoesslin@swsn.de]
Gesendet: Freitag, 18. Januar 2019 13:57
An: Arevalo, Mario Alfredo C; starlingx-discuss@lists.starlingx.io
Betreff: Re: [Starlingx-discuss] cpu mode

i do not know if this helps, but here is a little more input:

# virsh capabilities
<capabilities>

  <host>
    <uuid>00000000-0000-0000-0000-ac1f6b647302</uuid>
    <cpu>
      <arch>x86_64</arch>
      <model>EPYC-IBPB</model>
      <vendor>AMD</vendor>
      <microcode version='134222375'/>
      <topology sockets='1' cores='32' threads='2'/>
      <feature name='ht'/>
      <feature name='osxsave'/>
      <feature name='xsaves'/>
      <feature name='cmp_legacy'/>
      <feature name='extapic'/>
      <feature name='skinit'/>
      <feature name='wdt'/>
      <feature name='tce'/>
      <feature name='topoext'/>
      <feature name='perfctr_core'/>
      <feature name='perfctr_nb'/>
      <feature name='invtsc'/>
      <pages unit='KiB' size='4'/>
      <pages unit='KiB' size='2048'/>
      <pages unit='KiB' size='1048576'/>
    </cpu>
    <power_management>
      <suspend_mem/>
    </power_management>
    <iommu support='yes'/>
    <migration_features>
      <live/>
      <uri_transports>
        <uri_transport>tcp</uri_transport>
        <uri_transport>rdma</uri_transport>
      </uri_transports>
    </migration_features>
    <topology>
      <cells num='2'>
        <cell id='0'>
          <memory unit='KiB'>134119260</memory>
          <pages unit='KiB' size='4'>2891223</pages>
          <pages unit='KiB' size='2048'>59329</pages>
          <pages unit='KiB' size='1048576'>1</pages>
          <distances>
            <sibling id='0' value='10'/>
            <sibling id='1' value='32'/>
          </distances>
          <cpus num='64'>
            <cpu id='0' socket_id='0' core_id='0' siblings='0,64'/>
            <cpu id='1' socket_id='0' core_id='1' siblings='1,65'/>
            <cpu id='2' socket_id='0' core_id='2' siblings='2,66'/>
            <cpu id='3' socket_id='0' core_id='3' siblings='3,67'/>
            <cpu id='4' socket_id='0' core_id='4' siblings='4,68'/>
            <cpu id='5' socket_id='0' core_id='5' siblings='5,69'/>
            <cpu id='6' socket_id='0' core_id='6' siblings='6,70'/>
            <cpu id='7' socket_id='0' core_id='7' siblings='7,71'/>
            <cpu id='8' socket_id='0' core_id='8' siblings='8,72'/>
            <cpu id='9' socket_id='0' core_id='9' siblings='9,73'/>
            <cpu id='10' socket_id='0' core_id='10' siblings='10,74'/>
            <cpu id='11' socket_id='0' core_id='11' siblings='11,75'/>
            <cpu id='12' socket_id='0' core_id='12' siblings='12,76'/>
            <cpu id='13' socket_id='0' core_id='13' siblings='13,77'/>
            <cpu id='14' socket_id='0' core_id='14' siblings='14,78'/>
            <cpu id='15' socket_id='0' core_id='15' siblings='15,79'/>
            <cpu id='16' socket_id='0' core_id='16' siblings='16,80'/>
            <cpu id='17' socket_id='0' core_id='17' siblings='17,81'/>
            <cpu id='18' socket_id='0' core_id='18' siblings='18,82'/>
            <cpu id='19' socket_id='0' core_id='19' siblings='19,83'/>
            <cpu id='20' socket_id='0' core_id='20' siblings='20,84'/>
            <cpu id='21' socket_id='0' core_id='21' siblings='21,85'/>
            <cpu id='22' socket_id='0' core_id='22' siblings='22,86'/>
            <cpu id='23' socket_id='0' core_id='23' siblings='23,87'/>
            <cpu id='24' socket_id='0' core_id='24' siblings='24,88'/>
            <cpu id='25' socket_id='0' core_id='25' siblings='25,89'/>
            <cpu id='26' socket_id='0' core_id='26' siblings='26,90'/>
            <cpu id='27' socket_id='0' core_id='27' siblings='27,91'/>
            <cpu id='28' socket_id='0' core_id='28' siblings='28,92'/>
            <cpu id='29' socket_id='0' core_id='29' siblings='29,93'/>
            <cpu id='30' socket_id='0' core_id='30' siblings='30,94'/>
            <cpu id='31' socket_id='0' core_id='31' siblings='31,95'/>
            <cpu id='64' socket_id='0' core_id='0' siblings='0,64'/>
            <cpu id='65' socket_id='0' core_id='1' siblings='1,65'/>
            <cpu id='66' socket_id='0' core_id='2' siblings='2,66'/>
            <cpu id='67' socket_id='0' core_id='3' siblings='3,67'/>
            <cpu id='68' socket_id='0' core_id='4' siblings='4,68'/>
            <cpu id='69' socket_id='0' core_id='5' siblings='5,69'/>
            <cpu id='70' socket_id='0' core_id='6' siblings='6,70'/>
            <cpu id='71' socket_id='0' core_id='7' siblings='7,71'/>
            <cpu id='72' socket_id='0' core_id='8' siblings='8,72'/>
            <cpu id='73' socket_id='0' core_id='9' siblings='9,73'/>
            <cpu id='74' socket_id='0' core_id='10' siblings='10,74'/>
            <cpu id='75' socket_id='0' core_id='11' siblings='11,75'/>
            <cpu id='76' socket_id='0' core_id='12' siblings='12,76'/>
            <cpu id='77' socket_id='0' core_id='13' siblings='13,77'/>
            <cpu id='78' socket_id='0' core_id='14' siblings='14,78'/>
            <cpu id='79' socket_id='0' core_id='15' siblings='15,79'/>
            <cpu id='80' socket_id='0' core_id='16' siblings='16,80'/>
            <cpu id='81' socket_id='0' core_id='17' siblings='17,81'/>
            <cpu id='82' socket_id='0' core_id='18' siblings='18,82'/>
            <cpu id='83' socket_id='0' core_id='19' siblings='19,83'/>
            <cpu id='84' socket_id='0' core_id='20' siblings='20,84'/>
            <cpu id='85' socket_id='0' core_id='21' siblings='21,85'/>
            <cpu id='86' socket_id='0' core_id='22' siblings='22,86'/>
            <cpu id='87' socket_id='0' core_id='23' siblings='23,87'/>
            <cpu id='88' socket_id='0' core_id='24' siblings='24,88'/>
            <cpu id='89' socket_id='0' core_id='25' siblings='25,89'/>
            <cpu id='90' socket_id='0' core_id='26' siblings='26,90'/>
            <cpu id='91' socket_id='0' core_id='27' siblings='27,91'/>
            <cpu id='92' socket_id='0' core_id='28' siblings='28,92'/>
            <cpu id='93' socket_id='0' core_id='29' siblings='29,93'/>
            <cpu id='94' socket_id='0' core_id='30' siblings='30,94'/>
            <cpu id='95' socket_id='0' core_id='31' siblings='31,95'/>
          </cpus>
        </cell>
        <cell id='1'>
          <memory unit='KiB'>134213632</memory>
          <pages unit='KiB' size='4'>1239040</pages>
          <pages unit='KiB' size='2048'>62602</pages>
          <pages unit='KiB' size='1048576'>1</pages>
          <distances>
            <sibling id='0' value='32'/>
            <sibling id='1' value='10'/>
          </distances>
          <cpus num='64'>
            <cpu id='32' socket_id='1' core_id='0' siblings='32,96'/>
            <cpu id='33' socket_id='1' core_id='1' siblings='33,97'/>
            <cpu id='34' socket_id='1' core_id='2' siblings='34,98'/>
            <cpu id='35' socket_id='1' core_id='3' siblings='35,99'/>
            <cpu id='36' socket_id='1' core_id='4' siblings='36,100'/>
            <cpu id='37' socket_id='1' core_id='5' siblings='37,101'/>
            <cpu id='38' socket_id='1' core_id='6' siblings='38,102'/>
            <cpu id='39' socket_id='1' core_id='7' siblings='39,103'/>
            <cpu id='40' socket_id='1' core_id='8' siblings='40,104'/>
            <cpu id='41' socket_id='1' core_id='9' siblings='41,105'/>
            <cpu id='42' socket_id='1' core_id='10' siblings='42,106'/>
            <cpu id='43' socket_id='1' core_id='11' siblings='43,107'/>
            <cpu id='44' socket_id='1' core_id='12' siblings='44,108'/>
            <cpu id='45' socket_id='1' core_id='13' siblings='45,109'/>
            <cpu id='46' socket_id='1' core_id='14' siblings='46,110'/>
            <cpu id='47' socket_id='1' core_id='15' siblings='47,111'/>
            <cpu id='48' socket_id='1' core_id='16' siblings='48,112'/>
            <cpu id='49' socket_id='1' core_id='17' siblings='49,113'/>
            <cpu id='50' socket_id='1' core_id='18' siblings='50,114'/>
            <cpu id='51' socket_id='1' core_id='19' siblings='51,115'/>
            <cpu id='52' socket_id='1' core_id='20' siblings='52,116'/>
            <cpu id='53' socket_id='1' core_id='21' siblings='53,117'/>
            <cpu id='54' socket_id='1' core_id='22' siblings='54,118'/>
            <cpu id='55' socket_id='1' core_id='23' siblings='55,119'/>
            <cpu id='56' socket_id='1' core_id='24' siblings='56,120'/>
            <cpu id='57' socket_id='1' core_id='25' siblings='57,121'/>
            <cpu id='58' socket_id='1' core_id='26' siblings='58,122'/>
            <cpu id='59' socket_id='1' core_id='27' siblings='59,123'/>
            <cpu id='60' socket_id='1' core_id='28' siblings='60,124'/>
            <cpu id='61' socket_id='1' core_id='29' siblings='61,125'/>
            <cpu id='62' socket_id='1' core_id='30' siblings='62,126'/>
            <cpu id='63' socket_id='1' core_id='31' siblings='63,127'/>
            <cpu id='96' socket_id='1' core_id='0' siblings='32,96'/>
            <cpu id='97' socket_id='1' core_id='1' siblings='33,97'/>
            <cpu id='98' socket_id='1' core_id='2' siblings='34,98'/>
            <cpu id='99' socket_id='1' core_id='3' siblings='35,99'/>
            <cpu id='100' socket_id='1' core_id='4' siblings='36,100'/>
            <cpu id='101' socket_id='1' core_id='5' siblings='37,101'/>
            <cpu id='102' socket_id='1' core_id='6' siblings='38,102'/>
            <cpu id='103' socket_id='1' core_id='7' siblings='39,103'/>
            <cpu id='104' socket_id='1' core_id='8' siblings='40,104'/>
            <cpu id='105' socket_id='1' core_id='9' siblings='41,105'/>
            <cpu id='106' socket_id='1' core_id='10' siblings='42,106'/>
            <cpu id='107' socket_id='1' core_id='11' siblings='43,107'/>
            <cpu id='108' socket_id='1' core_id='12' siblings='44,108'/>
            <cpu id='109' socket_id='1' core_id='13' siblings='45,109'/>
            <cpu id='110' socket_id='1' core_id='14' siblings='46,110'/>
            <cpu id='111' socket_id='1' core_id='15' siblings='47,111'/>
            <cpu id='112' socket_id='1' core_id='16' siblings='48,112'/>
            <cpu id='113' socket_id='1' core_id='17' siblings='49,113'/>
            <cpu id='114' socket_id='1' core_id='18' siblings='50,114'/>
            <cpu id='115' socket_id='1' core_id='19' siblings='51,115'/>
            <cpu id='116' socket_id='1' core_id='20' siblings='52,116'/>
            <cpu id='117' socket_id='1' core_id='21' siblings='53,117'/>
            <cpu id='118' socket_id='1' core_id='22' siblings='54,118'/>
            <cpu id='119' socket_id='1' core_id='23' siblings='55,119'/>
            <cpu id='120' socket_id='1' core_id='24' siblings='56,120'/>
            <cpu id='121' socket_id='1' core_id='25' siblings='57,121'/>
            <cpu id='122' socket_id='1' core_id='26' siblings='58,122'/>
            <cpu id='123' socket_id='1' core_id='27' siblings='59,123'/>
            <cpu id='124' socket_id='1' core_id='28' siblings='60,124'/>
            <cpu id='125' socket_id='1' core_id='29' siblings='61,125'/>
            <cpu id='126' socket_id='1' core_id='30' siblings='62,126'/>
            <cpu id='127' socket_id='1' core_id='31' siblings='63,127'/>
          </cpus>
        </cell>
      </cells>
    </topology>
    <cache>
      <bank id='0' level='3' type='both' size='8' unit='MiB' cpus='0-3,64-67'/>
      <bank id='1' level='3' type='both' size='8' unit='MiB' cpus='4-7,68-71'/>
      <bank id='2' level='3' type='both' size='8' unit='MiB' cpus='8-11,72-75'/>
      <bank id='3' level='3' type='both' size='8' unit='MiB' cpus='12-15,76-79'/>
      <bank id='4' level='3' type='both' size='8' unit='MiB' cpus='16-19,80-83'/>
      <bank id='5' level='3' type='both' size='8' unit='MiB' cpus='20-23,84-87'/>
      <bank id='6' level='3' type='both' size='8' unit='MiB' cpus='24-27,88-91'/>
      <bank id='7' level='3' type='both' size='8' unit='MiB' cpus='28-31,92-95'/>
      <bank id='8' level='3' type='both' size='8' unit='MiB' cpus='32-35,96-99'/>
      <bank id='9' level='3' type='both' size='8' unit='MiB' cpus='36-39,100-103'/>
      <bank id='10' level='3' type='both' size='8' unit='MiB' cpus='40-43,104-107'/>
      <bank id='11' level='3' type='both' size='8' unit='MiB' cpus='44-47,108-111'/>
      <bank id='12' level='3' type='both' size='8' unit='MiB' cpus='48-51,112-115'/>
      <bank id='13' level='3' type='both' size='8' unit='MiB' cpus='52-55,116-119'/>
      <bank id='14' level='3' type='both' size='8' unit='MiB' cpus='56-59,120-123'/>
      <bank id='15' level='3' type='both' size='8' unit='MiB' cpus='60-63,124-127'/>
    </cache>
    <secmodel>
      <model>none</model>
      <doi>0</doi>
    </secmodel>
    <secmodel>
      <model>dac</model>
      <doi>0</doi>
      <baselabel type='kvm'>+0:+0</baselabel>
      <baselabel type='qemu'>+0:+0</baselabel>
    </secmodel>
  </host>

  <guest>
    <os_type>hvm</os_type>
    <arch name='i686'>
      <wordsize>32</wordsize>
      <emulator>/usr/bin/qemu-system-x86_64</emulator>
      <machine maxCpus='240'>pc-i440fx-rhel7.4.0</machine>
      <machine canonical='pc-i440fx-rhel7.4.0' maxCpus='240'>pc</machine>
      <machine maxCpus='240'>pc-i440fx-rhel7.0.0</machine>
      <machine maxCpus='240'>pc-i440fx-2.4</machine>
      <machine maxCpus='240'>rhel6.3.0</machine>
      <machine maxCpus='240'>rhel6.4.0</machine>
      <machine maxCpus='240'>rhel6.0.0</machine>
      <machine maxCpus='240'>pc-i440fx-2.8</machine>
      <machine maxCpus='240'>pc-i440fx-2.7</machine>
      <machine maxCpus='240'>pc-i440fx-2.10</machine>
      <machine canonical='pc-i440fx-2.10' maxCpus='240'>pc</machine>
      <machine maxCpus='240'>pc-i440fx-rhel7.1.0</machine>
      <machine maxCpus='240'>pc-i440fx-2.3</machine>
      <machine maxCpus='240'>pc-i440fx-rhel7.2.0</machine>
      <machine maxCpus='240'>pc-i440fx-2.2</machine>
      <machine maxCpus='240'>pc-q35-rhel7.3.0</machine>
      <machine canonical='pc-q35-rhel7.3.0' maxCpus='240'>q35</machine>
      <machine maxCpus='240'>rhel6.5.0</machine>
      <machine maxCpus='240'>rhel6.6.0</machine>
      <machine maxCpus='240'>rhel6.1.0</machine>
      <machine maxCpus='240'>pc-i440fx-2.6</machine>
      <machine maxCpus='240'>rhel6.2.0</machine>
      <machine maxCpus='240'>pc-i440fx-2.5</machine>
      <machine maxCpus='240'>pc-i440fx-rhel7.3.0</machine>
      <machine maxCpus='240'>pc-i440fx-2.9</machine>
      <domain type='qemu'/>
      <domain type='kvm'>
        <emulator>/usr/libexec/qemu-kvm</emulator>
        <machine maxCpus='240'>pc-i440fx-rhel7.4.0</machine>
        <machine canonical='pc-i440fx-rhel7.4.0' maxCpus='240'>pc</machine>
        <machine maxCpus='240'>pc-i440fx-rhel7.0.0</machine>
        <machine maxCpus='240'>pc-i440fx-2.4</machine>
        <machine maxCpus='240'>rhel6.3.0</machine>
        <machine maxCpus='240'>rhel6.4.0</machine>
        <machine maxCpus='240'>rhel6.0.0</machine>
        <machine maxCpus='240'>pc-i440fx-2.8</machine>
        <machine maxCpus='240'>pc-i440fx-2.7</machine>
        <machine maxCpus='240'>pc-i440fx-2.10</machine>
        <machine canonical='pc-i440fx-2.10' maxCpus='240'>pc</machine>
        <machine maxCpus='240'>pc-i440fx-rhel7.1.0</machine>
        <machine maxCpus='240'>pc-i440fx-2.3</machine>
        <machine maxCpus='240'>pc-i440fx-rhel7.2.0</machine>
        <machine maxCpus='240'>pc-i440fx-2.2</machine>
        <machine maxCpus='240'>pc-q35-rhel7.3.0</machine>
        <machine canonical='pc-q35-rhel7.3.0' maxCpus='240'>q35</machine>
        <machine maxCpus='240'>rhel6.5.0</machine>
        <machine maxCpus='240'>rhel6.6.0</machine>
        <machine maxCpus='240'>rhel6.1.0</machine>
        <machine maxCpus='240'>pc-i440fx-2.6</machine>
        <machine maxCpus='240'>rhel6.2.0</machine>
        <machine maxCpus='240'>pc-i440fx-2.5</machine>
        <machine maxCpus='240'>pc-i440fx-rhel7.3.0</machine>
        <machine maxCpus='240'>pc-i440fx-2.9</machine>
      </domain>
    </arch>
    <features>
      <cpuselection/>
      <deviceboot/>
      <disksnapshot default='on' toggle='no'/>
      <acpi default='on' toggle='yes'/>
      <apic default='on' toggle='no'/>
      <pae/>
      <nonpae/>
    </features>
  </guest>

  <guest>
    <os_type>hvm</os_type>
    <arch name='x86_64'>
      <wordsize>64</wordsize>
      <emulator>/usr/bin/qemu-system-x86_64</emulator>
      <machine maxCpus='240'>pc-i440fx-rhel7.4.0</machine>
      <machine canonical='pc-i440fx-rhel7.4.0' maxCpus='240'>pc</machine>
      <machine maxCpus='240'>pc-i440fx-rhel7.0.0</machine>
      <machine maxCpus='240'>pc-i440fx-2.4</machine>
      <machine maxCpus='240'>rhel6.3.0</machine>
      <machine maxCpus='240'>rhel6.4.0</machine>
      <machine maxCpus='240'>rhel6.0.0</machine>
      <machine maxCpus='240'>pc-i440fx-2.8</machine>
      <machine maxCpus='240'>pc-i440fx-2.7</machine>
      <machine maxCpus='240'>pc-i440fx-2.10</machine>
      <machine canonical='pc-i440fx-2.10' maxCpus='240'>pc</machine>
      <machine maxCpus='240'>pc-i440fx-rhel7.1.0</machine>
      <machine maxCpus='240'>pc-i440fx-2.3</machine>
      <machine maxCpus='240'>pc-i440fx-rhel7.2.0</machine>
      <machine maxCpus='240'>pc-i440fx-2.2</machine>
      <machine maxCpus='240'>pc-q35-rhel7.3.0</machine>
      <machine canonical='pc-q35-rhel7.3.0' maxCpus='240'>q35</machine>
      <machine maxCpus='240'>rhel6.5.0</machine>
      <machine maxCpus='240'>rhel6.6.0</machine>
      <machine maxCpus='240'>rhel6.1.0</machine>
      <machine maxCpus='240'>pc-i440fx-2.6</machine>
      <machine maxCpus='240'>rhel6.2.0</machine>
      <machine maxCpus='240'>pc-i440fx-2.5</machine>
      <machine maxCpus='240'>pc-i440fx-rhel7.3.0</machine>
      <machine maxCpus='240'>pc-i440fx-2.9</machine>
      <domain type='qemu'/>
      <domain type='kvm'>
        <emulator>/usr/libexec/qemu-kvm</emulator>
        <machine maxCpus='240'>pc-i440fx-rhel7.4.0</machine>
        <machine canonical='pc-i440fx-rhel7.4.0' maxCpus='240'>pc</machine>
        <machine maxCpus='240'>pc-i440fx-rhel7.0.0</machine>
        <machine maxCpus='240'>pc-i440fx-2.4</machine>
        <machine maxCpus='240'>rhel6.3.0</machine>
        <machine maxCpus='240'>rhel6.4.0</machine>
        <machine maxCpus='240'>rhel6.0.0</machine>
        <machine maxCpus='240'>pc-i440fx-2.8</machine>
        <machine maxCpus='240'>pc-i440fx-2.7</machine>
        <machine maxCpus='240'>pc-i440fx-2.10</machine>
        <machine canonical='pc-i440fx-2.10' maxCpus='240'>pc</machine>
        <machine maxCpus='240'>pc-i440fx-rhel7.1.0</machine>
        <machine maxCpus='240'>pc-i440fx-2.3</machine>
        <machine maxCpus='240'>pc-i440fx-rhel7.2.0</machine>
        <machine maxCpus='240'>pc-i440fx-2.2</machine>
        <machine maxCpus='240'>pc-q35-rhel7.3.0</machine>
        <machine canonical='pc-q35-rhel7.3.0' maxCpus='240'>q35</machine>
        <machine maxCpus='240'>rhel6.5.0</machine>
        <machine maxCpus='240'>rhel6.6.0</machine>
        <machine maxCpus='240'>rhel6.1.0</machine>
        <machine maxCpus='240'>pc-i440fx-2.6</machine>
        <machine maxCpus='240'>rhel6.2.0</machine>
        <machine maxCpus='240'>pc-i440fx-2.5</machine>
        <machine maxCpus='240'>pc-i440fx-rhel7.3.0</machine>
        <machine maxCpus='240'>pc-i440fx-2.9</machine>
      </domain>
    </arch>
    <features>
      <cpuselection/>
      <deviceboot/>
      <disksnapshot default='on' toggle='no'/>
      <acpi default='on' toggle='yes'/>
      <apic default='on' toggle='no'/>
    </features>
  </guest>

</capabilities>
________________________________________
Von: von Hoesslin, Volker [Volker.Hoesslin@swsn.de]
Gesendet: Freitag, 18. Januar 2019 10:30
An: Arevalo, Mario Alfredo C; starlingx-discuss@lists.starlingx.io
Betreff: Re: [Starlingx-discuss] cpu mode

hi,
this is an "ps aux | grep qemu" output (for better reading, a little bit formated by me):

/usr/libexec/qemu-kvm
-name guest=instance-0000000a,debug-threads=on
-S
-object secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-13-instance-0000000a/master-key.aes
-machine pc-i440fx-rhel7.4.0,accel=kvm,usb=off,dump-guest-core=off
-m 8192
-realtime mlock=off
-smp 4,sockets=4,cores=1,threads=1
-object memory-backend-file,id=ram-node0,prealloc=yes,mem-path=/mnt/huge-2048kB/libvirt/qemu/13-instance-0000000a,share=yes,size=8589934592,host-nodes=0,policy=bind
-numa node,nodeid=0,cpus=0-3,memdev=ram-node0
-uuid 3bce281c-db91-4b6f-aa48-832c27c2338f
-smbios type=1,manufacturer=Fedora Project,product=OpenStack Nova,version=16.0.2-1.tis.11,serial=f88367ca-9cf6-4678-bc69-69ed97297bb5,uuid=3bce281c-db91-4b6f-aa48-832c27c2338f,family=Virtual Machine
-no-user-config
-nodefaults
-chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-13-instance-0000000a/monitor.sock,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control
-rtc base=utc,driftfix=slew
-global kvm-pit.lost_tick_policy=delay
-no-hpet
-no-shutdown
-boot reboot-timeout=5000,strict=on
-global i440FX-pcihost.pci-hole64-size=67108864K
-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2
-drive file=rbd:cinder-volumes/volume-ef431cc7-2964-4335-8138-2d2c6642be6c:auth_supported=none:mon_host=192.168.204.3\:6789\;192.168.204.4\:6789\;192.168.204.112\:6789,format=raw,if=none,id=drive-virtio-disk0,cache=none,discard=unmap
-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1,write-cache=on,serial=ef431cc7-2964-4335-8138-2d2c6642be6c
-chardev socket,id=charnet0,path=/var/run/openvswitch/vhu74250cb0-40,server
-netdev vhost-user,chardev=charnet0,id=hostnet0
-device virtio-net-pci,netdev=hostnet0,id=net0,mac=fa:16:3e:ff:cc:ac,bus=pci.0,addr=0x3
-add-fd set=0,fd=81
-chardev pty,id=charserial0,logfile=/dev/fdset/0,logappend=on
-device isa-serial,chardev=charserial0,id=serial0
-device usb-tablet,id=input0,bus=usb.0,port=1
-vnc 0.0.0.0:1
-k en-us
-device cirrus-vga,id=video0,bus=pci.0,addr=0x2
-incoming defer
-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
-msg timestamp=on

=> btw, how can this cmd-line handle the spaces in argument "-smbios" or just "ps aux" remove the ' " ' ?

this is an running VM without any changes, created and started on top starlingx (2x controller, 2x compute, 3x storage). and yes, there is no "-cpu host" argument !?

this ends in something like this in guest view:

$ lscpu
Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
CPU(s):              4
On-line CPU(s) list: 0-3
Thread(s) per core:  1
Core(s) per socket:  1
Socket(s):           4
NUMA node(s):        1
Vendor ID:           AuthenticAMD
CPU family:          6
Model:               13
Model name:          QEMU Virtual CPU version 2.5+
Stepping:            3
CPU MHz:             2199.996
BogoMIPS:            4399.99
Hypervisor vendor:   KVM
Virtualization type: full
L1d cache:           64K
L1i cache:           64K
L2 cache:            512K
L3 cache:            16384K
NUMA node0 CPU(s):   0-3
Flags:               fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx fxsr_opt pdpe1gb lm nopl cpuid pni cx16 x2apic popcnt hypervisor lahf_lm 3dnowprefetch vmmcall

here are some outputs from my flavor metadata trys:

hw:cpu_model = SandyBridge
=> No valid host was found. There are not enough hosts available. compute-0: (VCpuModelFilter) Host VCPU model EPYC-IBPB required SandyBridge, compute-1: (VCpuModelFilter) Host VCPU model EPYC-IBPB required SandyBridge
of course, SandyBridge is an intel CPU, but all of allowed CPU architectures for meta extra specs "hw:cpu_model" are Intel devices, so i need AMD! do you remember:

$ openstack flavor set --property hw:cpu_model=EPYC-IBPB 76609f7b-f0c7-48ca-8c8a-f78481e62cd4
Failed to set flavor property: Invalid hw:cpu_model 'EPYC-IBPB', must be one of: Passthrough, Conroe, Penryn, Nehalem, Westmere, SandyBridge, IvyBridge, Haswell, Broadwell-noTSX, Broadwell, Skylake-Client, Skylake-Server.

how can i edit this allowed CPU-Model-List?!

the nova.conf settings define no CPU config, so the hyperviser has to handle this:

# cat /etc/nova/nova.conf | grep cpu_mode
libvirt_cpu_mode = none
cpu_mode=none

so this is an deadlock for me, i do not know how to fix this :(

plz help, volker...

________________________________________
Von: Arevalo, Mario Alfredo C [mario.alfredo.c.arevalo@intel.com]
Gesendet: Donnerstag, 17. Januar 2019 17:40
An: von Hoesslin, Volker; starlingx-discuss@lists.starlingx.io
Betreff: RE: cpu mode

Hi Volker,

Could you please send me the QEMU command line used to launch your VM, this is in
order to check the QEMU arguments/flags, possibly it requires "-cpu host" argument.

Thanks.

Best regards.
Mario.

From: von Hoesslin, Volker [Volker.Hoesslin@swsn.de]

Sent: Thursday, January 17, 2019 8:23 AM

To: starlingx-discuss@lists.starlingx.io

Subject: Re: [Starlingx-discuss] cpu mode

it is impossible to set a EPIC (or any other AMD) as guest CPU?

$ openstack flavor set --property hw:cpu_model=EPYC-IBPB 76609f7b-f0c7-48ca-8c8a-f78481e62cd4
Failed to set flavor property: Invalid hw:cpu_model 'EPYC-IBPB', must be one of: Passthrough, Conroe, Penryn, Nehalem, Westmere, SandyBridge, IvyBridge, Haswell, Broadwell-noTSX, Broadwell, Skylake-Client, Skylake-Server. (HTTP 400) (Request-ID: req-2fda19cc-8e0e-4be8-a8ea-b58fc00358ce)
Command Failed: One or more of the operations failed

but my compute node seems to support EPIC CPUs?

cat /usr/share/libvirt/cpu_map/x86_EPYC-IBRS.xml

<cpus>
  <model name='EPYC-IBPB'>
    <signature family='23' model='1'/>
    <vendor name='AMD'/>
    <feature name='3dnowprefetch'/>
 ....
    <feature name='xsavec'/>
    <feature name='xsaveopt'/>
  </model>
</cpus>

some tips for me how to handle this?

volker...

Von: von Hoesslin, Volker [Volker.Hoesslin@swsn.de]

Gesendet: Donnerstag, 17. Januar 2019 15:50

An: starlingx-discuss@lists.starlingx.io

Betreff: [Starlingx-discuss] cpu mode

hi,
my setup has two computes nodes, every node has a dual AMD EPYC 7601 CPU config. how can i bring all the CPU features (AES, SSSE3, ...) to the guest VMs. i have tryed with some flavor-metadata but nothing realy helps, the VMs getting just a little subset
 of cpu-features.
some investigations to the kvm-settings hit me to the facts that my nova config has "cpu_model=none" !? how can i fix that and bring my AMD EPIC CPU to my nova-config?!

here is the host /proc/cpuinfo

processor       : 127
vendor_id       : AuthenticAMD
cpu family      : 23
model           : 1
model name      : AMD EPYC 7601 32-Core Processor
stepping        : 2
microcode       : 0x8001227
cpu MHz         : 1200.000
cache size      : 512 KB
physical id     : 1
siblings        : 64
core id         : 31
cpu cores       : 32
apicid          : 127
initial apicid  : 127
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc art rep_good nopl nonstop_tsc extd_apicid amd_dcm aperfmperf eagerfpu pni pclmulqdq
 monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_l2 cpb hw_pstate retpoline_amd ssbd
 ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 clzero irperf xsaveerptr arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif overflow_recov
 succor smca
bogomips        : 4400.08
TLB size        : 2560 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 48 bits physical, 48 bits virtual
power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]

greez & thx,

volker...

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