On 5/12/06, Muthukumar S <muthukumar@xxxxxxxxx> wrote:
> Iperf has a demonstrated behavior that when running more than one copy at the > same time on the same box (client side); that the timing of each will > start to effect > the other copies. This is a function of how Iperf does it's timing > (spin loops). What traffic generators would you recommend? What do other members use? Has anyone used TG (http://www.postel.org/tg/)?
I have looked at TG but would recommend D-ITG (http://www.grid.unina.it/software/ITG/) at this point as it seems to have more work recently. That said I have downloaded TG but have not ran it too much. Back to Iperf. The reason I mention the timing issue is, really only an issue when you are running multiple copies and you really want very stable inter-packet timing. If you want to use Iperf for bandwidth testing and want to run multiple copies. Get the source and find the client send routines where it is using the delay function and replace that with usleep. This change allows (in my testing) upwards of 15 copies of Iperf running at the same time without major interactions. For a single stream Iperf is the most flexible program of the bunch Just for info, here is a site that has both monitoring (mostly) tools and traffic generation tools. http://www.slac.stanford.edu/xorg/nmtf/nmtf-tools.html _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
