[openib-general] cycles_to_units is incorrect in rdma_lat, rdma_bw.

[Bernhard Fischer]

On Thu, Jun 09, 2005 at 04:40:10PM -0700, Roland Dreier wrote:
>    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".

I may be wrong and OT, but from what i got, nowadays,
http://kerneltrap.org/node/340

ymmv,
-- 
Bernhard