Messages in this thread | | | Date | Thu, 13 Oct 2005 20:41:42 +0200 | From | Aviv Grafi <> | Subject | multiple sendmsg and single user-kernel switch |
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Hi all, I want to use the sendto (or sendmsg) for sending raw packets on a raw socket directly to the NIC (passing the kernel protocol stack). In addition to that i need so send a lot of packets (100-200Kpps) so i have to do that fast. Currently the kernel-user switching is killing me and i want to batch some packets before calling send() - to reduce the user-kernel switch overhead. Passing a batched buffer to the sendto() cause a probelm - the NIC have to get one message at a time because it has to calculate the L2 CRC for each packet (or msg). so batched buffer is not acceptable.
I would like to get some help please. any one have any idea how to reduce the user-kernel overhead (or sending a batched buffer so the kernel will call sendto for each buffer)?
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