Hi all,
We have a software which is reading CPU Timestamp Counter and the CPU Local Apic counter and the NIC I210 timestamp counter. Sometimes we see that there is, all of a sudden, a big time difference between the first two counters (which are both showing synchronous values) and the NIC I210 counter. This gives us the reason to believe that the first two counters are stopped by something for some time. Can anyone give us any hint, what could cause the first two counters to stop counting?
The time difference we see is about 150us. And this is not growing slowly, like a drift, but it seems to come in an instant, all of a sudden.
The system where we see this is an E3845. But we suppose this to be a general behaviour.
Thanks for any help!
HP