Hello collective wisdom. I am finding myself in this situation: one machine with two netcards. One talking to the outside (cheap 100MB), and one, an Intel E1000 card, connected with a crossover cable to another Linux PC that has to receive multicast UDP packets at the possibly highest rate. The traffic is 99.999% one-way. In the constant search for better performance I decided to buy these two gigabit ethernet cards, expecting, if not a 10-time increase in performance, at least some visible improvement. I seeonly marginal improvement if compared with a 100Mb set of cards plus switch. (the connection is confirmed as 1000MB full duplex on both sides) I have been searching for the bottleneck: the blovking calls to ''sendto'' suck up almost all time. I have an average CPU idle rate of 95%. OTOH, talking to the machine on the other end of the cable via SSH is very smooth: something that should not happen if my main process were occupying all possible bandwidth. It came to me that maybe this mysterious traffic control set of kernel modules and utilities could also be used to guarantee to one process a particularly high chunk of bandwidth on a specific channel. But the material I can find is mind-boggingly complex, with dozens of parameters and a whole new world of terminology. before I invest more in this path, I decided to ask you all if I am barking up the wrong tree... Whatever advice is welcome. Thanks in advance. Carlo -- * Se la Strada e la sua Virtu'' non fossero state messe da parte, * K * Carlo E. Prelz - lartc@fluido.as che bisogno ci sarebbe * di parlare tanto di amore e di rettitudine? (Chuang-Tzu) _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/