Haven't tested RELENG_4 performance in a controlled environment and
thus can't answer the question directly.  However using fastforward
on 6 and 7 is key to good performance.  Without it you're stuck at
some 150-200kpps, perhaps 300kpps.  With it you get to 500-800kpps.



To show that pps is mainly related to CPU freq (with high end component):

FreeBSD 6.2, packet size is 64bytes and value L3 Mb/s between the two only CPU change.

Xeon Woodcrest          2.33    3.00    1,287
pollng 1CPU:            210             257             1,224           
pollng 2CPU:            329             396             1,204
pollng 1CPU fastfwd:    291             364             1,251
pollng 2CPU fastfwd:    455             536             1,178

warn: this is not the same hardware than in the pdf.


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