I've done KVM based virtualization setup with following configuration.
HOST Machine
----------------
OS: CentOS 6.6 (64-bit)
CPU: Intel(R) Xeon(R) CPU E5606 @ 2.13GHz
RAM: 32 GBs
Disk: 2 TBs (LVM-based)
CPU support hardware virutalization & its already enabled.
[root@setup-01 ~]# grep -c vmx /proc/cpuinfo
8
KVM modules are loaded
[root@setup-01 ~]# lsmod | grep kvm
kvm_intel 55496 64
kvm 337900 1 kvm_intel
I'm running 32 virutal machines on this host, after experiacing slowness I observed only single CPU is being utilized on Host machine. Rest are idle.
top - 11:05:39 up 7 days, 20:31, 1 user, load average: 14.58, 15.04, 13.40
Tasks: 258 total, 13 running, 245 sleeping, 0 stopped, 0 zombie
Cpu0 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu1 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu2 : 46.2%us, 53.8%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu3 : 0.0%us, 0.3%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu4 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu5 : 0.0%us, 0.3%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu6 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu7 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 32811436k total, 14290408k used, 18521028k free, 119924k buffers
Swap: 8290300k total, 0k used, 8290300k free, 2549308k cached
Is there any setting is required to make sure KVM is taking full advantage of multi-processor environment. Let me know if more information is required for setup.
