decreasing interrupt CPU load

Jason Stone freebsd-performance at dfmm.org
Wed Oct 20 13:34:57 PDT 2004


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> Since you mentioned earlier that you run this on an SMP system, are you
> aware that device polling is available only for single CPU kernels, that
> is, not in SMP mode?

I read somewhere that there wasn't a specific reason for not allowing
device polling and smp to be used at the same time, and that it was fairly
safe to remove the #ifdef SMP/#error block in sys/kern/kern_poll.c and
compile in both smp and device polling.

I haven't done this in a production environment, but I've done it on my
smp desktop box, and it seems to work okay.


 -Jason

 --------------------------------------------------------------------------
 Freud himself was a bit of a cold fish, and one cannot avoid the suspicion
 that he was insufficiently fondled when he was an infant.
	-- Ashley Montagu


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