Earlier on this list there was a thread that the CPU usage of iperf was too high (75%..95%). Now, Ingo Molnar has found the problem: http://marc.info/?l=linux-kernel&m=119088670113210&w=2 I have tested this and the CPU usage dropped below 10%! Will go and add this patch before the other iperf patches and upload it to http://www.erg.abdn.ac.uk/users/gerrit/dccp/apps/#iperf - To unsubscribe from this list: send the line "unsubscribe dccp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html