Max Krasnyanskiy wrote:
quoted text
> David Miller wrote:
>> From: therbert@google.com (Tom Herbert)
>> Date: Wed,  5 Mar 2008 12:51:16 -0800 (PST)
>> 
>>> This patch implements kernel changes to allow scheduling of
>>> softirq's between processors. 
>>> 
>>> Signed-off-by: Tom Herbert <therbert@google.com>
>> 
>> I've stated this in the past and I still feel that it is foolish to
>> put all of this code into the kernel when every single piece of
>> networking hardware will be doing this for us transparently.
>> 
>> Maybe if someone had proposed this 4 or 5 years ago, but right now
>> this code will be irrelevant by the time it ships to any real users.
> 
> Plus it seems that for this kind of stuff it be better to replace
> network softirq with kthreads (like in -rt kernel) and let the
> scheduler take care of the load balancing. More flexible and scalable.
> I'd suggest for your to play with -rt kernel and see if it already
> does what you need.

Could we use something like this to reschedule NAPI onto other
processors?  If we get unlucky enough to have multiple napi routines
polling on a single CPU, and one or more completely idle CPUs (idle at
least for softirq) then we could really use one or the other of these
solutions.

anyone know how -rt kernels work for high I/O load environments like 10
Gigabit Ethernet?

Jesse
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