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...;'ve been asked to look at lately is interrupt load spreading, and intrd, to improve the network performance of CMT systems. From my read of the code, it looks like intrd only knows about virtual processors. This has major breakage in that all the virtual processors on a single core in a Niagra system share the common interrupt logic. I.e. when the interrupt handler runs, it interrupts _everything_ on that core. What I''m thinking of is to teach intrd about cores, so that instead of considering cpus (virtual), it instead considers load on *cores*. I think this will help it...