High interrupt CPU in top...

[Peter Harrison]

On 28 October 2014 17:24, Dutch Ingraham <stoa at gmx.us> wrote:

> On 10/28/14 09:27, Peter Harrison wrote:
> > On 27 October 2014 23:56, Dutch Ingraham <stoa at gmx.us> wrote:
> >
> >> On 10/27/2014 17:37, Peter Harrison wrote:
> >>
> >>>
> >>> [peter 181]> vmstat -i
> >>> interrupt                          total       rate
> >>> irq1: atkbd0                       11870          1
> >>> irq9: acpi0                        27499          4
> >>> irq12: psm0                       234774         39
> >>> irq16: uhci3                  1250818252     210292
> >>> irq20: hpet0 uhci0               6977995       1173
> >>> irq21: uhci1                          11          0
> >>> irq23: ehci0                           2          0
> >>> irq257: hdac0                      16380          2
> >>> irq258: iwn0                      559063         93
> >>> irq259: ahci0                     103732         17
> >>> irq260: vgapci0                   311808         52
> >>> Total                         1259061386     211678
> >>>
> >>>
> >>> Any idea why the uhci is causing such a high interrupt rate? Is that
> >>> normal? Sorry for being so noob.
> >>>
> >>>
> >>>
> >>> Peter Harrison.
> >>> _______________________________________________
> >>> freebsd-questions at freebsd.org mailing list
> >>> http://lists.freebsd.org/mailman/listinfo/freebsd-questions
> >>> To unsubscribe, send any mail to "
> >> freebsd-questions-unsubscribe at freebsd.org"
> >>>
> >>
> >> Please post back the output from <pciconf -lvc>
> >>
> >
> >
> > Here you go:
> >
> >  hostb0 at pci0:0:0:0: class=0x060000 card=0x20e017aa chip=0x2a408086
> rev=0x07
> > hdr=0x00
> >     vendor     = 'Intel Corporation'
> >     device     = 'Mobile 4 Series Chipset Memory Controller Hub'
> >     class      = bridge
> >     subclass   = HOST-PCI
> >     cap 09[e0] = vendor (length 10) Intel cap 1 version 1
> > vgapci0 at pci0:0:2:0: class=0x030000 card=0x20e417aa chip=0x2a428086
> rev=0x07
> > hdr=0x00
> >     vendor     = 'Intel Corporation'
> >     device     = 'Mobile 4 Series Chipset Integrated Graphics Controller'
> >     class      = display
> >     subclass   = VGA
> >     cap 05[90] = MSI supports 1 message enabled with 1 message
> >     cap 01[d0] = powerspec 3  supports D0 D3  current D0
> > vgapci1 at pci0:0:2:1: class=0x038000 card=0x20e417aa chip=0x2a438086
> rev=0x07
> > hdr=0x00
> >     vendor     = 'Intel Corporation'
> >     device     = 'Mobile 4 Series Chipset Integrated Graphics Controller'
> >     class      = display
> >     cap 01[d0] = powerspec 3  supports D0 D3  current D0
>
> >
> > Peter Harrison.
> > _______________________________________________
> > freebsd-questions at freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-questions
> > To unsubscribe, send any mail to "
> freebsd-questions-unsubscribe at freebsd.org"
> >
>
>
> OK - thanks.  Are you using xorg?  If so, please post back the output of
> <vmstat -i> run prior to starting X (from a reboot or restart, not by
> switching consoles).
>

Thanks for your help.

Here's vmstat-i with Xorg running:

 interrupt                          total       rate
irq1: atkbd0                         139          1
irq9: acpi0                          835          7
irq12: psm0                         1746         15
irq16: uhci3                    20622511     177780
irq20: hpet0 uhci0                118696       1023
irq21: uhci1                          11          0
irq23: ehci0                           2          0
irq257: hdac0                       3495         30
irq258: iwn0                       13406        115
irq259: ahci0                       8639         74
irq260: vgapci0                     1979         17
Total                           20771459     179064

And without Xorg running:

interrupt                          total       rate
irq1: atkbd0                         150          3
irq9: acpi0                          378          9
irq20: hpet0 uhci0                  8303        202
irq21: uhci1                          11          0
irq23: ehci0                           2          0
irq257: hdac0                         61          1
irq258: iwn0                        1536         37
irq259: ahci0                       1634         39
Total                              12075        294

So X is the problem? What can I do to fix it?

Cheers,



Peter Harrison.