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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>As far as I can tell, for KVM, the CPU value is only used in the
OpenNebula scheduler to prevent over-allocation. So, if you have defined the
host as having 2 CPUs the scheduler will run e.g. 1 VM requesting CPU 2.0, or 2
VMs requesting CPU 1.0, or 4 VMs requesting CPU 0.5 (each) on this host. For
KVM, it seems that once running on the hypervisor the CPU value is not enforced.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>c<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> users-bounces@lists.opennebula.org
[mailto:users-bounces@lists.opennebula.org] <b>On Behalf Of </b>Luca Lorenzini<br>
<b>Sent:</b> Friday, 26 November 2010 3:59<br>
<b>To:</b> users@lists.opennebula.org<br>
<b>Subject:</b> [one-users] CPU Issue<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I'm launching 3 vm with CPU=0.4 on a host dual core, but i
noticed that the vms use more than 0.4 of the cpu. top command show me this:<br>
<br>
PID USER PR NI VIRT RES
SHR S %CPU %MEM TIME+
COMMAND
<br>
24274 root 20 0 577m 504m 2868
S 90 25.7 0:31.77
kvm
<br>
24964 root 20 0 577m 511m 2864
S 60 26.1 0:29.77
kvm
<br>
23724 root 20 0 577m 497m 2868
S 35 25.4 0:34.60 kvm <br>
<br>
kvm use 90% of the cpu, not just 40%<o:p></o:p></p>
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