high system load when using i915kms

[Max Brazhnikov]

On Wed, 6 Mar 2013 08:15:37 +0200 Konstantin Belousov wrote:
> On Tue, Mar 05, 2013 at 12:24:51PM +0000, Max Brazhnikov wrote:
> > Hi,
> > 
> > I've switched recently to new xorg and kms driver. Sometimes after booting 
my
> > system (9.1-STABLE #0 r245741 amd64) shows high load:
> > 
> > interrupt                          total       rate
> > irq1: atkbd0                         612          0
> > irq9: acpi0                         3693          1
> > irq12: psm0                         7512          2
> > irq16: uhci0 uhci3             377172955     144069
> > irq20: hpet0                     2923357       1116
> > irq23: uhci1 ehci1                 47432         18
> > irq256: hdac0                      80799         30
> > irq257: alc0                       78474         29
> > irq258: iwn0                       19994          7
> > irq259: ahci0                     100016         38
> > irq260: vgapci0                    31250         11
> > Total                          380466094     145327
> > 
> > I've never seen this with old xorg. The problem is not always 
reproducible, 
> > but it's enough just to load i915kms module without staring X to trigger 
it.
> > 
> > Any idea?
> 
> So what is the complain ? Do you meaning that loading i915kms causes
> the spike in the interrupt rate on the irq16 line ?

I suspect it since the only change was update to newer xorg.

> What is the graphics part and the south bridge you are using ? Show
> the pciconf -lvc output.

http://people.freebsd.org/~makc/pciconf.output

Max