[Mactel-linux-users] lapic timer

[Justin M. <jus...@gm...>]

Hello; with looking into the kernel and doing some tests; I've managed to
have the usb_hcd_poll_rh_status (rh_timer_func) read around 1.3 - 1.5% with
the A/C
plugged and unplugged; with using the bootparam = nolapic_timer and setting
in my kernel config = preemption model low-latency desktop  cutting down the
Wakeups-from-idle per second : 441.3 with everything up and running i.g.
firefox, streaming music. The problem is in dmesg I see: Clockevents: could
not switch to one-shot mode:<6>Clockevents: could not switch to one-shot
mode: lapic is not functional
could not switch to high resolution mode on CPU1
could not switch to high resolution mode on CPU0
obviously from the bootparam nolapic_timer; Is there something I'm missing
in the kernel .config or a boot param to have the lapic timer on; with the
same results as when its off?  another question is when using powertop I
see  <KERNEL IPI> : Rescheduling interrupts at around 31% is this caused
from lapic being disabled?
any info would be appreciated
regards;
                --Justin P. Mattock