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On Friday 10 January 2003 16:45, Mihnea Balta wrote: > Hi, > > I have to implement a system which grabs udp packets off a gigabit > connection, take some basic action based on what they contain, repack their > data with a custom protocol header and send them through a gigabit ethernet > interface on broadcast. Following the indications I got here, I did the packet recieving stuff using a mmaped packet socket. From what I understand, that is a recieve-only interface, so it seems that I'm stuck with old sendto() for putting the packets back on the wire. I'd like to know if sendto() can do 20000 (small) packets/second on a fast x86 MP machine (dual or maybe quad) which doesn't do much besides this routing process. If it can't, please tell me if there's any feasible way of implementing a kind of buffer, i.e. keeping recieved packets in a local buffer and sending them alltoghether when the buffer fills or after a timer expires (I'm thinking DMA to the NIC or something simmilar, as the buffer will contain the complete packets, with all the required packets). Thanks, Mihnea PS: feasible == not spending 1 month development time for a 1 microsecond/packet improvement. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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