<html>Package: libvirt<br />Version: 0.9.12-11+deb7u4<br />Severity: serious<br /><br />Hello,<br />We have an improper core usability with our Dell R515/715 Hosts AMD Opteron servers.<br /><br />---<br /><br />OS : Debian 7.1<br />Linux vmsrv10 3.2.0-4-amd64 #1 SMP Debian 3.2.46-1 x86_64 GNU/Linux<br /><br /><br />---<br /><br />System Information<br /> Manufacturer: Dell Inc.<br /> Product Name: PowerEdge R715<br /><br />Processor Information<br /> Socket Designation: CPU1<br /> Type: Central Processor<br /> Family: Opteron 6100<br /> Manufacturer: AMD<br /> Signature: Family 16, Model 9, Stepping 1<br /><br />Processor Information<br /> Socket Designation: CPU2<br /> Type: Central Processor<br /> Family: Opteron 6100<br /> Manufacturer: AMD<br /> Signature: Famil
y 16, Model 9, Stepping 1<br /><br />---<br /><br />While lspcu show :<br />Architecture: x86_64<br />CPU op-mode(s): 32-bit, 64-bit<br />Byte Order: Little Endian<br />CPU(s): 24<br />On-line CPU(s) list: 0-23<br />Thread(s) per core: 1<br />Core(s) per socket: 12<br />Socket(s): 2<br />NUMA node(s): 4<br />Vendor ID: AuthenticAMD<br />CPU family: 16<br />Model: &n
bsp; 9<br />Stepping: 1<br />CPU MHz: 2100.360<br />BogoMIPS: 4200.10<br />Virtualization: AMD-V<br />L1d cache: 64K<br />L1i cache: 64K<br />L2 cache: 512K<br />L3 cache: 5118K<br />NUMA node0 CPU(s): 0,2,4,6,8,10<br />NUMA node1 CPU(s): 12,14,16,18,20,22<br />NUMA node2 CPU(s): 13,15,17,19,21,23<br />NUMA node3 CPU(
s): 1,3,5,7,9,11<br /><br />---<br /><br />virsh capabilities shows :<br /> <host><br /> <uuid>9522c890-ae6f-514a-c205-96147033a53c</uuid><br /> <cpu><br /> <arch>x86_64</arch><br /> <model>Opteron_G3</model><br /> <vendor>AMD</vendor><br /> <topology sockets='2' cores='6' threads='1'/><br /> <feature name='nodeid_msr'/><br /> <feature name='wdt'/><br /> <feature name='skinit'/><br /> <feature name='ibs'/><br /> <feature name='osvw'/><br /> <feature name='3dno
wprefetch'/><br /> <feature name='cr8legacy'/><br /> <feature name='extapic'/><br /> <feature name='cmp_legacy'/><br /> <feature name='3dnow'/><br /> <feature name='3dnowext'/><br /> <feature name='pdpe1gb'/><br /> <feature name='fxsr_opt'/><br /> <feature name='mmxext'/><br /> <feature name='ht'/><br /> <feature name='vme'/><br /> </cpu><br /> <power_management><br /> <suspend_disk/><br /> </power_management><br /> <
migration_features><br /> <live/><br /> <uri_transports><br /> <uri_transport>tcp</uri_transport><br /> </uri_transports><br /> </migration_features><br /> <topology><br /> <cells num='4'><br /> <cell id='0'><br /> <cpus num='6'><br /> <cpu id='0'/><br /> <cpu id='2'/><br /> <cpu id='4'/><br /> <cpu id=
9;6'/><br /> <cpu id='8'/><br /> <cpu id='10'/><br /> </cpus><br /> </cell><br /> <cell id='1'><br /> <cpus num='6'><br /> <cpu id='12'/><br /> <cpu id='14'/><br /> <cpu id='16'/><br /> <cpu id='18'/><br /> <c
pu id='20'/><br /> <cpu id='22'/><br /> </cpus><br /> </cell><br /> <cell id='2'><br /> <cpus num='6'><br /> <cpu id='13'/><br /> <cpu id='15'/><br /> <cpu id='17'/><br /> <cpu id='19'/><br /> <cpu id='21'/><br /> &
nbsp; <cpu id='23'/><br /> </cpus><br /> </cell><br /> <cell id='3'><br /> <cpus num='6'><br /> <cpu id='1'/><br /> <cpu id='3'/><br /> <cpu id='5'/><br /> <cpu id='7'/><br /> <cpu id='9'/><br /> <cpu id='11'/><br />
</cpus><br /> </cell><br /> </cells><br /> </topology><br /> </host><br /><br />---<br /><br />Trying to affect cpu > 11 lead to error :<br /><br />virsh vcpupin virtualsrv1 0 12<br />error: Physical CPU 12 doesn't exist.<br />error: cpulist: Invalid format.<br /><br />---<br /><br />By the way we are limited in use to 12 out of our 24 cores for VM possessor affectation.<br /><br />The problem is fixed since the build version 0.9.3 of libvirt (http://libvirt.org/news.html)<br />Bug fixes : nodeinfo: Get the correct CPU number on AMD Magny Cours platform (Osier Yang)<br /><br />Possible correction by upgrading libvirt version to at least v 0.9.3.<br /><br />Thanks.<br /><br />--<br />Bien cordialement,<br /><br /><span style="color:#EA5A0B"><strong>Franck LAVOCAT</strong></span><br /><strong>Centre de Ressources Informatiques</strong><br /><strong>T</st
rong> : 01 60 95 74 55<br />BÂTIMENT Copernic - BUREAU 4B023<br />franck.lavocat@u-pem.fr<br /><strong>UPEM - Université Paris-Est Marne-la-Vallée</strong><br />CITÉ DESCARTES - 5 BOULEVARD DESCARTES - CHAMPS-SUR-MARNE<br />77454 MARNE-LA-VALLÉE CEDEX 2 - <a href="http://www.u-pem.fr">www.u-pem.fr</a></html>