Hi, Couldn't you write a driver for the lan91c111 that uses the Altera DMA to Transfer the Packets between RAM and the MAC? That should speed up things!
Simon. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Timmy Brolin Sent: Saturday, March 25, 2006 12:17 AM To: Mailing list for lwIP users Subject: Re: [lwip-users] Lwip UDP performance >* Is lwip polled or interrupt driven. I've had a look at the code and >looks like it's a bit of both... (I call lan91c111if_service(&netif); >from main, the function is part of the driver provided for nios2.) > If you have a Ethernet MAC with DMA support (common for CPUs with integrated 100Mbit/s MAC) then you can set it up so that the MAC will automatically transfer the packets to pbuf chains using DMA. Then when there are one or more pbuf chains filled with packets, you get an interrupt. In this case it is of course interrupt driven, and quite efficient. >* Is there an option to disable the udp checksum check? Or is it a case >of modifying the code? > Don't know. In etiher case, have you assembly optimized the checksum routine? Checksum optimization has a huge impact on both UDP and TCP performance. /Timmy _______________________________________________ lwip-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/lwip-users _______________________________________________ lwip-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/lwip-users
