Re: em interrupt storm

From: Frank Mayhar (frank_at_exit.com)
Date: 11/24/05

  • Next message: Massimo Lusetti: "Re: em interrupt storm" 
    To: Barney Wolff <barney@databus.com>
Date: Wed, 23 Nov 2005 23:42:32 -0800

    On Thu, 2005-11-24 at 02:14 -0500, Barney Wolff wrote:
    > I've observed the interrupt aliasing problem on an Asus A7M266-D
    > with 2 Athlon 2200-MPs, so it's not confined to the Intel chipset.
    > Here's the evidence (there is nothing connected to ehci0):

    This prompted me to take a look at my setup. Sure enough, same thing:

    realtime ~>vmstat -i
    interrupt total rate
    irq1: atkbd0 6218 0
    irq3: sio1 2 0
    irq4: sio0 245363 1
    irq6: fdc0 3 0
    irq12: psm0 379932 2
    irq13: npx0 1 0
    irq16: ohci2 1651974 9
    irq17: pcm0 ehci0 35766600 198
    irq18: nvidia0++ 15223737 84
    irq19: xl0 ohci0+ 2407671 13
    irq20: ahc0 1610309 8
    irq21: em0 35275352 196
    cpu0: timer 359360608 1998
    cpu1: timer 359337445 1998
    Total 811265215 4512

    I haven't been using pcm0 and there's nothing on ohci2. This is a dual
    Athlon MP 1900+, AMD chipset (Tyan Tiger MPX board)...

    realtime ~>uname -a
    FreeBSD realtime.exit.com 6.0-STABLE FreeBSD 6.0-STABLE #0: Wed Nov 16
    19:57:03 PST 2005 frank@jill.exit.com:/usr/obj/usr/src/sys/REALTIME
    i386 

    -- 
Frank Mayhar frank@exit.com     http://www.exit.com/
Exit Consulting                 http://www.gpsclock.com/
                                http://www.exit.com/blog/frank/
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