On Thu, Aug 17, 2006 at 01:43:40AM +0200, Benjamin Herrenschmidt wrote: > > Sounds good (without actually looking at the code though :), that was a > long required improvement to that driver. Also, we should probably look > into using NAPI polling for tx completion queue as well, no ?
Just for a lark, I tried using NAPI polling, while disabling all TX interrupts. Performance was a disaster: 8Mbits/sec, fom which I conclude that the tcp ack packets do not flow back fast enough to allw reliance on NAPI polling for transmit. I was able to get as high as 960 Mbits/sec in unusal circumstances, at 100% cpu usage. Oprofile indicates that the next major improvement would be to add scatter/gather, which I'll take a shot at next week, if I don't get interrupted. However, I'm getting interrupted a lot these days. --linas - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
