Shirley> I used cyclets_to_units() get Bandwidth peak (#0 to
    Shirley> #972): 1852.72 MByte/sec

    Shirley> Which is far away from the 1X (2.5Gbit/s) throughtput.

Actually it's not that far away -- the 2.5 Gbit/sec is after 8b/10b
coding, so the raw data rate is really 2 Gbit/sec.  Getting > 92% link
utilization is pretty good considering packet header overhead and so
on.  BTW I'm assuming "MByte/sec" is a typo for "Mbit/sec".

 - R.
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