> I don't have "*nomp=1" in plan9.ini, but I am running the 9atom kernel > you gave me. :) When it boots, it outputs the message "nomp: no mp > structure".
i ran some actual tests, and it turns out that i can get 1515 interrupts/sec and 1950 syscalls/sec just by moving my usb mouse constantly. the load average is still 0, and the interrupt time is <= 3% so if you are seeing a performance problem just due to the mouse, the i would think that the fact that your machine is doing 8259-style interrupts has something to do with it. eio processing on 8259-style interrupts can take a long time. - erik
