DragonFly-2.3.0.864.gc5b83 master sys/platform/pc32/apic mpapic.c sys/platform/pc32/isa clock.c sys/platform/pc64/isa clock.c sys/platform/vkernel/platform systimer.c sys/sys systimer.h

[Hasso Tepper]

Matthew Dillon wrote:
>     450 interrupts/sec sounds ok for an idle system.  I'd expect a
> higher number, actually.

Yes, but ...

>     I wonder if the load calculations are being messed up by the C3
>     state.  The code path for the per-cpu hardclock interrupt has
> always been fairly sensitive.  With the 8254 it was being driven by
> IPIs. Now it is being driven by an actual interrupt so there might be
> an issue with how it distinguishes the system state when accounting for
> the clock tick.

It seems to be a real load though - applications lag etc.

And one more thing. With sephe's change it's even worse _without_ lapic. 
The interrupt load is still there and the rate of clock interrupts 
doubles to ~800.


-- 
Hasso Tepper