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Evgeniy Polyakov wrote:
>>As he points out (and i am sure he can back it with data ;->), that
>>given the setup cost, packet size, algo and CPU and bus speed, it may
>>not make sense to use the chip at all ;->
> Michal has numbers - pure hardware beats soft in a certain setups
> in a fully synchronous schema, let's work SW and HW in parallel.
Yes, I have *some* numbers, but consider that they are for quite
eligible setup - encrypting ~1.5k IPsec packets. I should retry with a
much smaller MTU to see the difference...
I think it won't be the programmer but the system administrator who will
have to correctly set priorities and constraints for different
hardware/software engines for the particular system. With a slow CPU it
may be worth to offload even small blocks to hardware, with a fast one
it may be worth to set HW and SW as equal, etc.
SUSE Labs mludvig@xxxxxxx
(+420) 296.545.373 http://www.suse.cz
Personal homepage http://www.logix.cz/michal
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