Messages in this thread | | | Date | Fri, 10 Mar 2000 14:18:35 EST | From | Larry Sendlosky <> | Subject | Re: new IRQ scalability changes in 2.3.48 |
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> >> The current default for dp264 should be ok at lest for 2-way and maybe ok > >> for 4-way too (max number of CPU supported by dp264). > > > >Eh. It still seems sloppy. > > 2-way is fine here. 4-way I don't know yet :) > I have to agree with Richard here. From what I've been told, it's fairly "expensive" for an Alpha to "jump" for an IRQ interrupt and not get it - i.e. wasted time. If the code exists to support it, the "default setup" at init time could be to assign IRQs rotating through the list of CPUs. This way no IRQ would be sent to more than one CPU (if I'm understanding correctly how all this works) therefore incurring no wasted cycles.
larry
______________________________________________________________________ Larry Sendlosky ATS larry@scrugs.lkg.dec.com (978) 506-6640 Compaq ----------------------------------------------------------------------
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