On 09/20/2013 07:34 PM, Robert Sanford wrote:

One more point, if you're not doing this already: Allocate 2^N-1 
mbufs, not 2^N. According to the code and comments: "The optimum size 
(in terms of memory usage) for a mempool is when n is a power of two 
minus one: n = (2^q - 1)."

Many thanks! Didn't know about it.