Re: [Qemu-devel] [patch 0/3] kvmclock: Ensure time in migration never goes backward (v3)

[Paolo Bonzini]

Il 05/09/2014 21:35, Andrey Korolyov ha scritto:
> - boot up a VM, make sure to feed it heavy long task, for example
> kernel compilation,
> - neither migrate once in the middle of process (with fallback to
> non-live migration which is available in libvirt, else it may take
> forever) or just wait up to the end,
> - live migration time degrades from sub-10s value to larger values
> forever, not regarding if workload is still presented or not.

Are you sure you aren't simply doing migration with a low bandwidth
limit (the default is 32 MB/s), and moving over a gigabyte worth of page
cache data to the new machine?

Paolo