Interrupt storm

[John Baldwin]

On Wednesday 30 March 2005 11:22 am, Divacky Roman wrote:
> On Tue, Mar 29, 2005 at 01:35:33PM -0500, Jung-uk Kim wrote:
> > On Tuesday 29 March 2005 01:22 pm, Dan Cojocar wrote:
> > > Hello all,
> > >
> > > I noticed the following interrupt storm in my dmesg:
> > >
> > > Interrupt storm detected on "irq11: rl1"; throttling interrupt
> > > source Interrupt storm detected on "irq5: rl0"; throttling
> > > interrupt source
> > >
> > > Here is my vmstat -i:
> > > interrupt                          total       rate
> > > irq0: clk                         128600        199
> > > irq1: atkbd0                        2499          3
> > > irq4: sio0                             2          0
> > > irq5: rl0                         128901        200
> > > irq8: rtc                          82294        127
> > > irq11: rl1                        128902        200
> > > irq12: psm0                        16152         25
> > > irq14: ata0                        12600         19
> > > irq15: ata1                           71          0
> > > Total                             500021        776
> > >
> > > and here is my dmesg:
> > > http://cs.ubbcluj.ro/~dan/dmesg.txt
> > >
> > > I have options DEVICE_POLLING and options HZ=200, i have tested
> > > with greater HZ values like 1000, and without DEVICE_POLLING  but i
> > > have the same storm.
> >
> > Try this:
> >
> > http://docs.freebsd.org/cgi/mid.cgi?200503161154.04555.jkim
>
> as this points to my posts...
>
> my problem is not the interrupt storm, but that I dont have assigned irq
> for keyboard (which makes it slow I think).
>
> and this is clear regression because in 5.3R it worked ;(
>
> where should I look (in sources) what changed? I am not very skilled with
> this lowlevel stuff but I am able and willing to try to hunt this down.
>
> thnx for reply

ukbd0 doesn't get IRQs. USB host controllers like uhci0 and ohci0 get IRQs, 
but not the devices attached to the bus.

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org