Re: Preallocated skb's?

["Andi Kleen" <ak@xxxxxxx>]

On Thu, Sep 14, 2000 at 11:59:32PM +1100, Andrew Morton wrote:
> That's 20 usec per interrupt, of which 1 usec could be saved by skb
> pooling.

FF usually runs with interrupt mitigation at higher rates (8-16 or even
more packets / interrupt). I agree though that it probably does not 
make too much difference.  alloc_skb could probably be made cheaper 
for the FF case by being more clever in the slab constructor (I think
there was some bitrot during 2.3 on the cache line usage -- 2.2 pretty
much only needed 2 cache lines in the header for a FF packet) 


-Andi