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Re: vmstat -i shows strange interrupts

To: Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>
From: Mark Cullen <mark.cullen@xxxxxxxxxxxxx>
Date: Wed, 20 Oct 2004 22:06:23 +0100

Matthew Dillon wrote:
:Hi there, got it installed :-)
:-- vmstat --
:beast# vmstat -i
:interrupt total rate
:??? 0 0
:stray irq0 0 0
:stray irq1 0 0
:stray irq2 0 0
:stray irq3 0 0
:stray irq4 0 0
:stray irq5 0 0
:mux irq11 42624 13
:atkbd0 irq1 3361 1
:psm0 irq12 0 0
:sio0 irq4 0 0
:sio1 irq3 0 0
:ppc0 irq7 0 0
:clk irq0 698586 226
:Total 814148 263
:What's with all the strange stray's? Is this normal? It doesn't seem to

    Yes, it's normal.  Notice all the counts are 0 ?  The stray interrupts
    are placeholders for unassigned and alternative irq vectors.   This is
    especially true for systems with APICs because we use a different vector
    number for SLOW vs FAST interrupts on the same irq.

Nothing to worry about then :)

:be affecting much but then it doesn't look quite right either. Where's :my fxp0 card too! Is this perhaps an ACPI issue? All I can think of

    The fxp0 card is in the 'mux' slot for irq 11, along with other cards
    sharing that interrupt.  vmstat -I is simply not traversing the MUX list
    or the sysctl isn't generating it, or something like that.

I figured maybe it was the mux one a minute ago. Don't actually know what mux is, but I had a look at my dmesg and saw my fxp card was using IRQ 11.

Matthew Dillon <dillon@xxxxxxxxxxxxx>

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