Guilhem Tardy wrote:
>
> > Hrm, my tests, where I use mili-second timers in data sent
> > from userspace shows that I can run 100Mbps of TCP, UDP,
> > and custom Ethernet traffic with less than 1 milisecond of
> > latency. And that is end-to-end (user-space to user-space).
> > This is 100Mbps tx and 100Mbps rx at the same time, too...
> >
> > Maybe you don't mean miliseconds??
> >
> > ping also shows about .3ms for round-trip on normal fast-ethernet
> > and modern computers....
> >
> > Ben
>
> I run over a 100Mbps ethernet card from 3COM (hence the 3c59x.c driver), and
> stand by my measurements in microseconds. Yeah, you're right this was
> microseconds (sorry for the heart attack ;). Really, this can go as low as 19
> usec and as high as 1300+ usec for the total.
>
> I included the application that receives and sinks the UDP traffic for your
> consideration. One thing puzzles me: my calibration results in either 350 or
> 800 megaticks per second, changing from time to time on the same setup. Would
> you think of an explanation for that?
Maybe your CPU clocks itself down when over-heated? (Is your cooling
adequate?) I have no other ideas as to why the timing changes..
Ben
>
> Guilhem.
>
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> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> Name: measure_udp_traffic.c
> measure_udp_traffic.c Type: application/x-unknown
> Encoding: base64
> Description: measure_udp_traffic.c
--
Ben Greear <greearb@xxxxxxxxxxxxxxx> <Ben_Greear@xxxxxxxxxx>
President of Candela Technologies Inc http://www.candelatech.com
ScryMUD: http://scry.wanfear.com http://scry.wanfear.com/~greear
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