On Tue, 08 Apr 2014 15:35:29 +0200, Peter Senna Tschudin said:
> I'm not sure that rdtsc registers are synchronized on different CPUs.
There exist Intel multi-core chipsets that explicitly do *not* have
synchronised rdtsc registers.
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You need to know exactly what you are doing for using rdtsc. There are
some external factors that affect the counting such as dynamic clock,
and out of order execution. I'm not sure that rdtsc registers are
synchronized on different CPUs. Some code for you to play with:
https://github.com/petersenn
Hi all,
I’m running xen 4.2 on Linux Kernel 3.7 and I’m trying to figure out the time
taken(latency) by a network packet to reach it’s destination VM from the time
it arrives at the NIC. What do you think is the best way to do it? I was
thinking may be add rdtsc timestamp to the IP options head
