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Programmed I/O vs. Shared Memory vs. DMA

 
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thedark
Second Lieutenant


Joined: 30 Jul 2005
Posts: 1074

PostPosted: Thu Aug 04, 2005 5:45 pm    Post subject: Programmed I/O vs. Shared Memory vs. DMA Reply with quote
If you can already send and receive back-to-back packets, you just can't put more bits over the wire. Every modern ethercard can receive back-to-back packets. The Linux DP8390 drivers (wd80x3, SMC-Ultra, 3c503, ne2000, etc) come pretty close to sending back-to-back packets (depending on the current interrupt latency) and the 3c509 and AT1500 hardware have no problem at all automatically sending back-to-back packets.
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