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my_cause
2016 May 13
0
vcpupin vs taskset performance difference
...the VCPUs of a running VM.
The problem is, that I noticed a significant performance drop in my metrics when using 'vcpupin' from the virsh console instead of running 'taskset' natively.
Specifically the methods I am comparing are
1. Using native shell
taskset -a -cp $MY_CPUSET $MY_DOMAIN_PID
2. Using virsh console (performance ~30% down)
for all $VCPUs
virsh vcpupin my_domain -cpulist $MY_CPUSET -vcpu $VCPU -live
virsh emulatorpin my_domain -cpulist $MY_CPUSET -live
It seems that the usage of 'vcpupin' causes a performance drop e...