Greetings,

I am writing a code using libvirt API to migrate VM between two physical hosts (QEMU/KVM) , say some n number of times.

1) I am using right now virDomainPtr virDomainMigrate (.......) and to calculate the total migration time I am using something like this:

clock_gettime(CLOCK_MONOTONIC_RAW,&begin);   
 migrate(domainToMigrate,nodeToMigrate);
clock_gettime(CLOCK_MONOTONIC_RAW,&end);

Is this correct way to calculate total migration time. And is there some way to calculate the downtime (not how to set it)?

2) I am interested in identifying in particular other statistics of migration like :

Number of iterations in Pre Copy, Memory transferred in each iteration etc.

I was going through the API and found virDomainJobInfo and virDomainGetJobStats functions.But how to use them is not very clear. Can anyone point me to right place to achieve this objective?

Thanks in advance.

And sorry if that was too silly to ask.

Anubhav