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...tive view of things and doesn't know the absolute delay - because it only has the other side's timestamps to look at. So you can see that you could get a 20msec lag and even a 10000msec jitter. I'd just comment that the jitter buffer only needs to account for jitter. It matters nowt to the jitter buffer if the packets have been 2 hours in transit as long as they arrive at a steady pace. Sometimes timestamps on an iax call do jump rather than incrementing steadily. This can happen for example where voice starts coming from a new source. The jitter buffer sees this as a su...

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths