Anthony Liguori wrote:
Just do a linear search of the CPUState list and be done with it. This smells of premature optimization greatly. I would be amazed if walking the CPUState list is ever on the fast path or will ever be. Really, if you need to go from cpu_index => CPUState, it suggests you're doing something wrong.
apic_bus_deliver() in hw/apic.c (it uses a static array of local apics, but under you proposal it would need to be converted to a list as well).
happens once per interrupt. With external interrupts you might precompute it, but IPIs definitely need fast int->ptr conversion.
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