Denis Ovsienko <[email protected]> wrote:
>> This is what I would *suspect*:
>>
>> Coming out of the GRE tunnel, your packet would have to be
>> decapsulated by the kernel, and then re-queued into the network
>> bottom half. Generally, the kernel does interrupt mitigation, and
>> since this is a soft-interrupt, that queue is serviced from a clock
>> interrupt.
>>
>> As such, you'd see the values quantized to the clock interrupt, which
>> is exactly what I see in your diagram.
> That's a worthwhile hypothesis (and not excluding ICMP
> software-forwarded elsewhere), but shouldn't the green (ICMP in GRE)
> RTT be strictly greater than the red (plain ICMP) RTT in this case?
I agree --- this bothered me as well.
Is the RTT being calculated by an ICMP? I thought it was a babeld packet.
--
] Never tell me the odds! | ipv6 mesh networks [
] Michael Richardson, Sandelman Software Works | network architect [
] [email protected] http://www.sandelman.ca/ | ruby on rails [
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