Greetings! I am new to kvm qemu and are writing a python script to get the number of pre-copy cycles during a remote vm migration given memory size M of a VM in MB, the page dirty rate R of a vm in MB/s. My question is on how to get the page dirty rate. Does kvm qemu provide a dirty page log facility that provides user space with a bitmap of modified pages since the last call? And if yes, please kindly direct me on how to get started. I have searched and come across things like
kvm_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log, int *is_dirty), I do not know if this is the one and if yes how I can use it or ways to implement it. Thank you very much
