On Mon, Dec 01, 2008 at 05:46:48PM +0000, Leslie Newell wrote:
> Is it possible to use EMC with multi-core processors? I see that by 
> default the kernel is compiled to only support one processor but what 
> would happen if SMP support was compiled in? Would RTAI choke?
> 
> As multi-core processors become more prevalent, would it be practical to 
> dedicate one core to the realtime stuff and let the other(s) do the 
> rest? It seems wasteful but I would have thought it would give very low 
> latency.

I did this a while back on a dual P3 system.  It gave excellent
latency.  Like you say, you can isolate a CPU so nothing but realtime
tasks run on it.  No special support is needed in EMC2; it is just a
kernel and RTAI configuration issue.

It was quite a job to get everything compiled right.  I hope it's
easier now but I wouldn't bet on it.


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