On Wed, Mar 12, 2003 at 05:44:25PM +1100, Peter Jeremy wrote:
...
> Are you sure you were generating "wire speed" packets - this is about
> 200,000 packets/sec at Fast speed. "ping -f" runs at whatever rate
148,800kpps
> In order to get 200,000 pps, you're going to need 5-10 hosts
> generating traffic, each with a good NIC and connected to the test
one is enough as long as it is sufficiently fast (750MHz and above
in my experiments), you use a C program to call sendto() and
generate UDP packets, and your network card can cope with the
outgoing traffic (e.g. there is no way the 'fxp' can transmit
over ~120kpps no matter how fast the CPU is; 'xl' and several 'dc'
supported chips can do the job. Haven't tried other cards.
Using polling on the sender side helps but it is not
fundamental.
cheers
luigi
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