Re: Interrupt storm
From: Dan Cojocar (dan.cojocar_at_gmail.com)
Date: 06/30/05
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- In reply to: John Baldwin: "Re: Interrupt storm"
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Date: Thu, 30 Jun 2005 09:42:05 +0300 To: freebsd-current@freebsd.org
On 6/29/05, John Baldwin <jhb@freebsd.org> wrote:
> On Tuesday 05 April 2005 03:46 pm, Dan Cojocar wrote:
> > On Apr 5, 2005 9:23 PM, John Baldwin <jhb@freebsd.org> wrote:
> > > On Tuesday 05 April 2005 12:44 pm, Dan Cojocar wrote:
> > > > On Apr 5, 2005 5:30 PM, John Baldwin <jhb@freebsd.org> wrote:
> > > > > On Tuesday 29 March 2005 01:35 pm, 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
> > > > >
> > > > > He's not using an APIC so that won't make any difference.
> > > >
> > > > If I use APIC, I will get "watchdog timeout" as i posted in an old
> > >
> > > email:
> > > > >rl0: watchdog timeout
> > > > >rl1: watchdog timeout
> > > > >rl0: watchdog timeout
> > > > >rl1: watchdog timeout
> > > > >rl1: watchdog timeout
> > > > >rl1: watchdog timeout
> > > > >rl1: watchdog timeout
> > > >
> > > > Thanks,
> > > > Dan
> > >
> > > That's indicative of other interrupt routing problems. This is with APIC
> > > + ACPI, yes? If you disable ACPI, does APIC work or is it not found?
> > > Also, if you disable ACPI, does non-APIC work ok?
> >
> > Yes i get "watchdog timeout" if i use ACPI+APIC.
> > Here is my dmesg for current+acpi+apic.
> > http://cs.ubbcluj.ro/~dan/current+acpi+apic.txt
> > If i disable acpi, the system is not able to boot to the login
> > prompt. I did a break
> > into debugger after waiting for 15 minutes and i noticed that the
> > interrupts for rl0 are increasing very quickly, so i think that is why
> > the system is so slow.
> > Here is a dmesg for current without ACPI and with APIC, but only in
> > single mode
> > without if_rl module and many other modules.
> > http://cs.ubbcluj.ro/~dan/current+noacpi+apic+singlemode.txt
> > And if I disable ACPI i don't see the interrupts storms but i don't
> > have ACPI :(
> > http://cs.ubbcluj.ro/~dan/current+noacpi+noapic.txt
> > And here is current with ACPI and without APIC:
> > http://cs.ubbcluj.ro/~dan/current+acpi+noapic.txt
> > Thanks,
> > Dan
>
> I haven't forgotten about this, I've just been busy. So, I'm still trying to
> understand. Correct me if I'm wrong: APIC always gets interrupt storms; it
> doesn't matter if ACPI is enabled or disabled. Without APIC, ACPI gives you
> interrupt storms, but no ACPI works fine. Is that correct? Do you get
> interrupt storms if ACPI is enabled but APIC is not on both current and
> RELENG_5?
Hello John,
With apic and acpi i was getting watchdog timeout on rl0 and rl1.
If i disabled apic, and use only acpi i was getting interrupt storms,
the same i get if i use only apic, and the system was ok without acpi
and apic, but in this version i didn't have acpi features :(. The
links with my dmesg from previous message are valid.
I was getting this behaviour only if i used a second network card,
tested only with realteck.
Unfortunately now i don't have the second nic :( in my system, but
if you need more info i will get a new one.
Now with recent -current and only one realteck nic and with acpi
enabled and apic disabled the system is not having interrupt storms
and no watchdog timeouts, but i noticed that my downloads rate is
dropping to half of my bandwidth, no mather if i use device_polling or
not. I was thinking that this is related to my realteck nic but now
just tested my modem on usb with cdce driver and i get the same
behaviour.
Last time I tested this only on current, I don't know if in recent
RELENG_5 is the same.
Thank you John for your time,
Dan
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- Previous message: Brooks Davis: "Re: New dhclient broke multiple domains in domain-name"
- In reply to: John Baldwin: "Re: Interrupt storm"
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