linux-kernel - Re: core2 duo, interrupts: is this normal?

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Date:	Fri, 16 Mar 2007 01:31:46 -0400
From:	Len Brown <lenb@...nel.org>
To:	Norberto Bensa <nbensa@....net>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: core2 duo, interrupts: is this normal?

On Thursday 15 March 2007 21:24, Norberto Bensa wrote:
> Hello,
> 
> is this output, normal? I meant, why counters on CPU1 is zero? Isn't this 
> balanced?

yes, it is normal.

If you had an interrupt-limited workload then irqbalance
would pick things up and spread them out.

-Len


> $ cat /proc/interrupts
>            CPU0       CPU1
>   0:    4180170          0   IO-APIC-edge      timer
>   1:       8060          0   IO-APIC-edge      i8042
>   7:          0          0   IO-APIC-edge      parport0
>   9:          0          0   IO-APIC-fasteoi   acpi
>  12:          5          0   IO-APIC-edge      i8042
>  16:     322297          0   IO-APIC-fasteoi   uhci_hcd:usb3, libata, nvidia, 
> EMU10K1
>  17:     896399          0   IO-APIC-fasteoi   bttv0, eth0, libata
>  18:      72867          0   IO-APIC-fasteoi   ehci_hcd:usb1, uhci_hcd:usb7
>  19:      27770          0   IO-APIC-fasteoi   ehci_hcd:usb2, uhci_hcd:usb5
>  20:          0          0   IO-APIC-fasteoi   uhci_hcd:usb4
>  21:          0          0   IO-APIC-fasteoi   uhci_hcd:usb6
>  22:          3          0   IO-APIC-fasteoi   ohci1394
>  23:        155          0   IO-APIC-fasteoi   HDA Intel
> 219:     103056          0   PCI-MSI-edge      libata
> NMI:          0          0
> LOC:    4077613    4077622
> ERR:          0
> MIS:          0
> 
> 
> Many thanks in advance,
> Norberto
> -
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