I am not tweaking anything. I need to run in UDP because I am trying to track packet loss due to collisions. This brings me to my next question: is it possible (and can anyone verify that) the link-layer is ack'ing packets, and therefore resending some. I know this is in the 802.11 spec.
Randy On Tue, Apr 27, 2010 at 3:34 PM, Jon Dugan <[email protected]> wrote: > Excerpts from Randy Buck's message of Tue Apr 27 15:31:58 -0500 2010: > > I've peaked at around 17 Mbps. > > Interesting. Are you manually tweaking the TCP buffers or letting the > autotuning stuff do it's magic? The buffering TCP does might smooth things > out a bit over the UDP case. > > I'm fairly sure the UDP send buffers are fairly small by default on most > systems. I'm betting that the UDP send() in Iperf is blocking due to a > lack > of buffer space in the kernel which in turn is caused by the inability to > get > enough time on the radio. The UDP sends in Iperf are very bursty and the > burstyness might aggrevate the problem. > > Jon > -- > Jon M. Dugan <[email protected]> > ESnet Network Engineering Group > Lawrence Berkeley National Laboratory > > > ------------------------------------------------------------------------------ > _______________________________________________ > Iperf-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/iperf-users >
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