Hi,
There was an update to freebsd-head a few days ago from hans - it
disabled PCI interrupts for VGA until a driver claims it.
See if that helps?
-a
b
On 10 June 2015 at 05:33, Yanhui Shen <shen.elf at gmail.com>
wrote:> Hi,
>
> I noticed the interrupt rate of my FreeBSD system is very high (~35%) after
> upgrade from r279138 to r284205.
>
> To find out which revision cause this problem,
> I used a binary search manner and compiled the kernel 11 times.
> Finally I located to r279961, the interruption rate is abnormal since this
> revision.
>
> Do you have any idea about this issue?
>
> ( I'm temporarily using r279958 kernel with r284205 base system,
everything
> is fine.)
>
> --------------------------------
>
> Device: ThinkPad R400 (Product ID: 278225C)
> CPU: Intel Core 2 Duo processor T6570 (2.1 GHz)
> GPU: Intel Integrated Graphics 4500MHD
>
> Output of "vmstat -i" with r284205 kernel (abnormal):
> interrupt total rate
> irq1: atkbd0 1607 1
> irq9: acpi0 131958 104
> irq12: psm0 4281 3
> irq16: uhci3 239899376 189643
> irq20: hpet0 uhci0 1426118 1127
> irq21: uhci1 40315 31
> irq23: ehci0 33 0
> irq256: vgapci0 6059 4
> irq257: em0 49220 38
> irq258: hdac0 62 0
> irq260: ahci0:ch0 17217 13
> irq261: ahci0:ch1 23 0
> Total 241576269 190969
>
> Output of "vmstat -i" with r279958 kernel (normal):
> interrupt total rate
> irq1: atkbd0 48155 3
> irq9: acpi0 1581468 105
> irq12: psm0 209484 13
> irq19: ehci1 48099 3
> irq20: hpet0 uhci0 17385585 1156
> irq21: uhci1 680884 45
> irq23: ehci0 31 0
> irq256: vgapci0 2611430 173
> irq257: em0 1342009 89
> irq258: hdac0 602220 40
> irq260: ahci0:ch0 236313 15
> irq261: ahci0:ch1 27 0
> Total 24745705 1646
>
> The revision:
> https://svnweb.freebsd.org/base?view=revision&revision=279961
>
> --------------------------------
>
> Best regards,
> Yanhui Shen
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