> Hello, Hello! > I need to implement a system which acts somewhat like a router, i.e. it grabs > udp packets from the internet, processess them and then sends them on an > ethernet via broadcast. Following the indications I got on a linux-kernel > list thread, 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 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. It's a userspace program or a kernel module? --- Catalin(ux) BOIE catab@deuroconsult.ro - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
