High Interrupt rate since r279961 on STABLE/10 branch

[Yanhui Shen]

Hi,

Thanks, it works!

https://svnweb.freebsd.org/base/head/sys/dev/pci/vga_pci.c?r1=284012&r2=284011&pathrev=284012



2015-06-11 0:38 GMT+08:00 Adrian Chadd <adrian at freebsd.org>:

> 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
> > _______________________________________________
> > freebsd-stable at freebsd.org mailing list
> > http://lists.freebsd.org/mailman/listinfo/freebsd-stable
> > To unsubscribe, send any mail to "freebsd-stable-unsubscribe at freebsd.org
> "
>



-- 
Best regards,
Yanhui Shen