Bug 1181465

Summary: too little cpu information when use virsh capabilities in ppc64
Product: Red Hat Enterprise Linux 7 Reporter: Luyao Huang <lhuang>
Component: libvirtAssignee: Andrea Bolognani <abologna>
Status: CLOSED ERRATA QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.1CC: dgibson, dyuan, dzheng, gsun, michen, mzhan, ngu, rbalakri, weizhan, xuhan, ypu
Target Milestone: rcKeywords: Upstream
Target Release: ---   
Hardware: ppc64   
OS: Linux   
Whiteboard:
Fixed In Version: libvirt-1.2.15-1.el7 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-11-19 06:07:58 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Luyao Huang 2015-01-13 09:05:01 UTC 
Description of problem:
too little cpu information when use virsh capabilities in ppc64

Version-Release number of selected component (if applicable):
libvirt-1.2.8-10.el7.ppc64

How reproducible:
100%

Steps to Reproduce:
1.virsh # capabilities 
<capabilities>

  <host>
    <uuid>293e428c-2c37-4ae2-9c95-a5a8ec1f6672</uuid>
    <cpu>
      <arch>ppc64</arch>
      <topology sockets='1' cores='160' threads='1'/>   <---no model and vendor here
      <pages unit='KiB' size='64'/>
      <pages unit='KiB' size='16384'/>
      <pages unit='KiB' size='16777216'/>
    </cpu>
    <power_management>
      <suspend_mem/>
      <suspend_disk/>
      <suspend_hybrid/>
    </power_management>
    <migration_features>
      <live/>
      <uri_transports>
        <uri_transport>tcp</uri_transport>
        <uri_transport>rdma</uri_transport>
      </uri_transports>
    </migration_features>
    <topology>
      <cells num='4'>
        <cell id='0'>
          <memory unit='KiB'>67108864</memory>
          <pages unit='KiB' size='64'>1048576</pages>
          <pages unit='KiB' size='16384'>0</pages>
          <pages unit='KiB' size='16777216'>0</pages>
          <distances>
            <sibling id='0' value='10'/>
            <sibling id='1' value='20'/>
            <sibling id='16' value='40'/>
            <sibling id='17' value='40'/>
          </distances>
          <cpus num='2'>
            <cpu id='8' socket_id='0' core_id='40' siblings='8'/>
            <cpu id='16' socket_id='0' core_id='96' siblings='16'/>
          </cpus>
        </cell>
        <cell id='1'>
          <pages unit='KiB' size='64'>0</pages>
          <distances>
            <sibling id='0' value='20'/>
            <sibling id='1' value='10'/>
            <sibling id='16' value='40'/>
            <sibling id='17' value='40'/>
          </distances>
          <cpus num='4'>
            <cpu id='48' socket_id='1' core_id='168' siblings='48'/>
            <cpu id='56' socket_id='1' core_id='176' siblings='56'/>
            <cpu id='64' socket_id='1' core_id='224' siblings='64'/>
            <cpu id='72' socket_id='1' core_id='240' siblings='72'/>
          </cpus>
        </cell>
        <cell id='16'>
          <memory unit='KiB'>67108864</memory>
          <pages unit='KiB' size='64'>1048576</pages>
          <pages unit='KiB' size='16384'>0</pages>
          <pages unit='KiB' size='16777216'>0</pages>
          <distances>
            <sibling id='0' value='40'/>
            <sibling id='1' value='40'/>
            <sibling id='16' value='10'/>
            <sibling id='17' value='20'/>
          </distances>
          <cpus num='32'>
            <cpu id='80' socket_id='16' core_id='2080' siblings='80'/>
            <cpu id='88' socket_id='16' core_id='2088' siblings='88'/>
            <cpu id='90'/>
            <cpu id='91'/>
            <cpu id='92'/>
            <cpu id='93'/>
            <cpu id='94'/>
            <cpu id='95'/>
            <cpu id='96' socket_id='16' core_id='2096' siblings='96'/>
            <cpu id='97'/>
            <cpu id='98'/>
            <cpu id='99'/>
            <cpu id='100'/>
            <cpu id='101'/>
            <cpu id='102'/>
            <cpu id='103'/>
            <cpu id='104' socket_id='16' core_id='2144' siblings='104'/>
            <cpu id='105'/>
            <cpu id='106'/>
            <cpu id='107'/>
            <cpu id='108'/>
            <cpu id='109'/>
            <cpu id='110'/>
            <cpu id='111'/>
            <cpu id='112' socket_id='16' core_id='2152' siblings='112'/>
            <cpu id='113'/>
            <cpu id='114'/>
            <cpu id='115'/>
            <cpu id='116'/>
            <cpu id='117'/>
            <cpu id='118'/>
            <cpu id='119'/>
          </cpus>
        </cell>
        <cell id='17'>
          <pages unit='KiB' size='64'>0</pages>
          <distances>
            <sibling id='0' value='40'/>
            <sibling id='1' value='40'/>
            <sibling id='16' value='20'/>
            <sibling id='17' value='10'/>
          </distances>
          <cpus num='40'>
            <cpu id='120' socket_id='17' core_id='2208' siblings='120'/>
            <cpu id='121'/>
            <cpu id='122'/>
            <cpu id='123'/>
            <cpu id='124'/>
            <cpu id='125'/>
            <cpu id='126'/>
            <cpu id='127'/>
            <cpu id='128' socket_id='17' core_id='2216' siblings='128'/>
            <cpu id='129'/>
            <cpu id='130'/>
            <cpu id='131'/>
            <cpu id='132'/>
            <cpu id='133'/>
            <cpu id='134'/>
            <cpu id='135'/>
            <cpu id='136' socket_id='17' core_id='2272' siblings='136'/>
            <cpu id='137'/>
            <cpu id='138'/>
            <cpu id='139'/>
            <cpu id='140'/>
            <cpu id='141'/>
            <cpu id='142'/>
            <cpu id='143'/>
            <cpu id='144' socket_id='17' core_id='2280' siblings='144'/>
            <cpu id='145'/>
            <cpu id='146'/>
            <cpu id='147'/>
            <cpu id='148'/>
            <cpu id='149'/>
            <cpu id='150'/>
            <cpu id='151'/>
            <cpu id='152' socket_id='17' core_id='2288' siblings='152'/>
            <cpu id='153'/>
            <cpu id='154'/>
            <cpu id='155'/>
            <cpu id='156'/>
            <cpu id='157'/>
            <cpu id='158'/>
            <cpu id='159'/>
          </cpus>
        </cell>
      </cells>
    </topology>
    <secmodel>
      <model>selinux</model>
      <doi>0</doi>
      <baselabel type='kvm'>system_u:system_r:svirt_t:s0</baselabel>
      <baselabel type='qemu'>system_u:system_r:svirt_tcg_t:s0</baselabel>
    </secmodel>
    <secmodel>
      <model>dac</model>
      <doi>0</doi>
      <baselabel type='kvm'>+107:+107</baselabel>
      <baselabel type='qemu'>+107:+107</baselabel>
    </secmodel>
  </host>

  <guest>
    <os_type>hvm</os_type>
    <arch name='ppc64'>
      <wordsize>64</wordsize>
      <emulator>/usr/libexec/qemu-kvm</emulator>
      <machine maxCpus='256'>pseries-rhel7.1.0</machine>
      <machine maxCpus='256'>pseries</machine>
      <domain type='qemu'>
      </domain>
      <domain type='kvm'>
        <emulator>/usr/libexec/qemu-kvm</emulator>
      </domain>
    </arch>
    <features>
      <deviceboot/>
      <disksnapshot default='on' toggle='no'/>
    </features>
  </guest>

</capabilities>

2.
3.

Actual results:
miss model and vendor in capabilities, which will be use in cpu-compare and cpu-baseline

Expected results:
have some basic vendor and model

Additional info:

seems powerpc have its special cpu system and can get few information from /proc/cpuinfo

# cat /proc/cpuinfo
processor       : 8
cpu             : POWER8E (raw), altivec supported
clock           : 3690.000000MHz
revision        : 2.0 (pvr 004b 0200)

...

processor       : 152
cpu             : POWER8E (raw), altivec supported
clock           : 3690.000000MHz
revision        : 2.0 (pvr 004b 0200)

timebase        : 512000000
platform        : PowerNV
model           : 8247-22L
machine         : PowerNV 8247-22L
firmware        : OPAL v3
Comment 1 David Gibson 2015-01-13 23:26:32 UTC 
More importantly, the topology information is incorrect - it should show has having 20 cores and 8 threads, not 160 cores with 1 thread.
Comment 2 Andrea Bolognani 2015-04-14 14:50:54 UTC 
Hi,

the issue reported has been fixed by commit

  commit 1e911742287d964055f33ab76d53e673a9b4477f
  Author: Prerna Saxena <prerna.ibm.com>
  Date:   Tue Nov 4 22:58:33 2014 +0530

      PowerPC:Improve PVR handling to fall back to cpu generation.

which is included in libvirt as of 1.2.11 (v1.2.10-41-g1e91174).

The fact that, as David pointed out, the topology is not reported correctly,
is completely unrelated and still affects libvirt as of 1.2.14.

Could you please open another BZ to track that specific issue?

Thanks.
Comment 3 Andrea Bolognani 2015-04-14 15:01:01 UTC 
Actually, nevermind: RHBZ 1192360 has already been filed to track the topology issue.

Have a nice day.
Comment 7 Dan Zheng 2015-07-27 07:42:20 UTC 
Test on below packages:
libvirt-1.2.17-2.el7.ppc64le
kernel-3.10.0-292.el7.ppc64le
qemu-kvm-rhev-2.3.0-9.el7.ppc64le

Test 1:
Pass.

# virsh capabilities
<capabilities>

  <host>
    <uuid>7eefcde7-086c-412b-afe1-1306a9f22b3f</uuid>
    <cpu>
      <arch>ppc64le</arch>
      <model>power8e</model>                
      <vendor>IBM</vendor>
      <topology sockets='1' cores='160' threads='1'/>
      <pages unit='KiB' size='64'/>
      <pages unit='KiB' size='16384'/>
      <pages unit='KiB' size='16777216'/>
    </cpu>
    <power_management>
      <suspend_mem/>
      <suspend_disk/>
      <suspend_hybrid/>
    </power_management>
    <migration_features>
      <live/>
      <uri_transports>
        <uri_transport>tcp</uri_transport>
        <uri_transport>rdma</uri_transport>
      </uri_transports>
    </migration_features>
    <topology>
      <cells num='4'>
        <cell id='0'>
          <memory unit='KiB'>67108864</memory>
          <pages unit='KiB' size='64'>1048576</pages>
          <pages unit='KiB' size='16384'>256</pages>
          <pages unit='KiB' size='16777216'>0</pages>
          <distances>
            <sibling id='0' value='10'/>
            <sibling id='1' value='20'/>
            <sibling id='16' value='40'/>
            <sibling id='17' value='40'/>
          </distances>
          <cpus num='5'>
            <cpu id='0' socket_id='0' core_id='32' siblings='0'/>
            <cpu id='8' socket_id='0' core_id='48' siblings='8'/>
            <cpu id='16' socket_id='0' core_id='96' siblings='16'/>
            <cpu id='24' socket_id='0' core_id='104' siblings='24'/>
            <cpu id='32' socket_id='0' core_id='112' siblings='32'/>
          </cpus>
        </cell>
        <cell id='1'>
          <memory unit='KiB'>67108864</memory>
          <pages unit='KiB' size='64'>1048576</pages>
          <pages unit='KiB' size='16384'>256</pages>
          <pages unit='KiB' size='16777216'>0</pages>
          <distances>
            <sibling id='0' value='20'/>
            <sibling id='1' value='10'/>
            <sibling id='16' value='40'/>
            <sibling id='17' value='40'/>
          </distances>
          <cpus num='5'>
            <cpu id='40' socket_id='1' core_id='160' siblings='40'/>
            <cpu id='48' socket_id='1' core_id='176' siblings='48'/>
            <cpu id='56' socket_id='1' core_id='224' siblings='56'/>
            <cpu id='64' socket_id='1' core_id='232' siblings='64'/>
            <cpu id='72' socket_id='1' core_id='240' siblings='72'/>
          </cpus>
        </cell>
        <cell id='16'>
          <memory unit='KiB'>67108864</memory>
          <pages unit='KiB' size='64'>1048576</pages>
          <pages unit='KiB' size='16384'>256</pages>
          <pages unit='KiB' size='16777216'>0</pages>
          <distances>
            <sibling id='0' value='40'/>
            <sibling id='1' value='40'/>
            <sibling id='16' value='10'/>
            <sibling id='17' value='20'/>
          </distances>
          <cpus num='5'>
            <cpu id='80' socket_id='16' core_id='2080' siblings='80'/>
            <cpu id='88' socket_id='16' core_id='2088' siblings='88'/>
            <cpu id='96' socket_id='16' core_id='2096' siblings='96'/>
            <cpu id='104' socket_id='16' core_id='2144' siblings='104'/>
            <cpu id='112' socket_id='16' core_id='2160' siblings='112'/>
          </cpus>
        </cell>
        <cell id='17'>
          <memory unit='KiB'>67108864</memory>
          <pages unit='KiB' size='64'>1048576</pages>
          <pages unit='KiB' size='16384'>256</pages>
          <pages unit='KiB' size='16777216'>0</pages>
          <distances>
            <sibling id='0' value='40'/>
            <sibling id='1' value='40'/>
            <sibling id='16' value='20'/>
            <sibling id='17' value='10'/>
          </distances>
          <cpus num='5'>
            <cpu id='120' socket_id='17' core_id='2216' siblings='120'/>
            <cpu id='128' socket_id='17' core_id='2224' siblings='128'/>
            <cpu id='136' socket_id='17' core_id='2272' siblings='136'/>
            <cpu id='144' socket_id='17' core_id='2280' siblings='144'/>
            <cpu id='152' socket_id='17' core_id='2288' siblings='152'/>
          </cpus>
        </cell>
      </cells>
    </topology>
    <secmodel>
      <model>selinux</model>
      <doi>0</doi>
      <baselabel type='kvm'>system_u:system_r:svirt_t:s0</baselabel>
      <baselabel type='qemu'>system_u:system_r:svirt_tcg_t:s0</baselabel>
    </secmodel>
    <secmodel>
      <model>dac</model>
      <doi>0</doi>
      <baselabel type='kvm'>+107:+107</baselabel>
      <baselabel type='qemu'>+107:+107</baselabel>
    </secmodel>
  </host>

  <guest>
    <os_type>hvm</os_type>
    <arch name='ppc64le'>
      <wordsize>64</wordsize>
      <emulator>/usr/libexec/qemu-kvm</emulator>
      <machine maxCpus='255'>pseries-rhel7.2.0</machine>
      <machine canonical='pseries-rhel7.2.0' maxCpus='255'>pseries</machine>
      <domain type='qemu'/>
      <domain type='kvm'>
        <emulator>/usr/libexec/qemu-kvm</emulator>
      </domain>
    </arch>
    <features>
      <cpuselection/>
      <deviceboot/>
      <disksnapshot default='on' toggle='no'/>
    </features>
  </guest>

</capabilities>

# cat /proc/cpuinfo
processor	: 0
cpu		: POWER8E (raw), altivec supported
clock		: 3690.000000MHz
revision	: 2.0 (pvr 004b 0200)

processor	: 8
cpu		: POWER8E (raw), altivec supported
clock		: 3690.000000MHz
revision	: 2.0 (pvr 004b 0200)

...

processor	: 152
cpu		: POWER8E (raw), altivec supported
clock		: 3690.000000MHz
revision	: 2.0 (pvr 004b 0200)

timebase	: 512000000
platform	: PowerNV
model		: 8247-22L
machine		: PowerNV 8247-22L
firmware	: OPAL v3
Comment 9 errata-xmlrpc 2015-11-19 06:07:58 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2202.html