Re: thread pools, performance

[David Boreham <david_list@boreham.org>]

Howard Chu wrote:
> It's pretty amazing to watch the processor status in top and see an 
> entire CPU consumed by interrupt processing. That kind of points to 
> some major walls down the road; while any 1GHz or faster processor 
> today can saturate 100Mbps ethernet, it takes much faster processors 
> to fully utilize 1Gbps ethernet. And unlike bulk data transfer 
> protocols like ftp or http, we won't get any benefit from using jumbo 
> frames in typical LDAP deployments.
This may be a NIC hardware issue.
I get 80k pps using ttcp with two very fast test machines that have 
Tigon NICs,
which would match your 40k auths/s.
This guy's work suggests that the Intel hardware is much more capable :
http://pdos.csail.mit.edu/~rtm/e1000/
And in fact, when I test between two boxes with e1000 nics, but much
slower CPUs than the first boxen, I get 250k pps.