Messages in this thread |  | | Date | Mon, 18 Sep 2000 16:45:17 +0100 (BST) | From | Alan Cox <> |
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> Yup. That's true. Like it's also nonintuitive sometimes that PIO can even > beat, in some cases, DMA (some graphics fifo devices, e.g.).
It can be true for networking devices in some cases too. Ive been playing at putting K7 prefetch instructions in the ethernet drivers and netif_rx so that the packet header is back in cache after the DMA invalidated it when fetching the packet
> > I think Jes was getting this in Linux TCP/IP without zero copy. > What was the CPU utilization?
I dont know. I suspect pretty high.
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