Erich,
On 12/02/2012 08:54 PM, Erich Heine wrote:
Jonathan,
My research group has had some good experiences using products from Endace (
http://www.endace.com/) for network timing measurement at the ethernet
level. I don't have a pointer immediately to the work, but if there is
interest can ask tomorrow at work. The gist of it though was to understand
precise timing characteristics of network switches for better simulation.
Examining the time "in switch" for various packets at the microsecond level
was needed to understand various delay curves for different network loads,
with an ultimate goal of proper statistical modeling reflecting reality as
close as possible.
This is a bold challenge, it's a difficult task (clear speak: there is a
reason for this to be a research field, industry never *really* got it
under control).
I personally have also used endace products to measure packet timings for
research, but I didn't need so much precision for that work - however I can
say they have a good API and decent tech support for interacting with their
cards and products.
Is there native support with Linux kernels?
It would be very nice to have the support using SO_TIMESTAMP and friends.
Cheers,
Magnus
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