On Thu, 2005-08-12 at 17:57 +0100, Eric Dumazet wrote: > > right, after i did this code, i realized that, and it is demonstrable > > that #4 hurts, if only a little. > > I'm sticking with my suggestion we go to #1,#2,#5 > > I would try another thing : #1,#2,#4bis > > #4bis prefetch(&next_skb->data); > > instead of any combination of #4 or #5 > > #4 prefetch(next_skb); > #5 prefetch(next_skb->data - NET_IP_ALIGN); > > This way, the next time #1 is done (next loop), previous #4bis makes the > dereference hit the L1 cache : Prefetch should be more efficient. >
yep, I see a small difference with the above. The numbers went up by about 1Kpps. Could the Robert/Jesse also verify this? I normally dont get excited by an extra kpps these days;-> cheers, jamal - 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
