Re: SMP and CPU1 not showing interrupts in /proc/interrupts

From: Arjan van de Ven (arjan@fenrus.demon.nl)
Date: Sun Feb 23 2003 - 08:52:39 EST

On Sun, 2003-02-23 at 10:42, James Harper wrote:
> somewhere between about 2.5.53 and 2.5.62 my /proc/interrupts has gone
> from an approximately even distribution of interrupts between CPU0 and
> CPU1 to grossly uneven:
>
> CPU0 CPU1
> 0: 13223321 2233217 IO-APIC-edge timer
> 1: 13442 0 IO-APIC-edge i8042
> 2: 0 0 XT-PIC cascade
> 3: 291874 0 IO-APIC-edge serial
> 8: 3 0 IO-APIC-edge rtc
> 9: 0 0 IO-APIC-edge acpi
> 14: 18932 0 IO-APIC-edge ide0
> 15: 14 0 IO-APIC-edge ide1
> 16: 190607 1 IO-APIC-level eth0, nvidia
> 17: 3214 0 IO-APIC-level bttv0
> 18: 14249 1 IO-APIC-level ide2
> 19: 121942 0 IO-APIC-level uhci-hcd, wlan0
> NMI: 0 0
> LOC: 15458218 15458423
> ERR: 0
> MIS: 0
>
> if i really hit the system hard then CPU1 will start accruing interrupts
> but in a mostly idle state CPU1 just sits on its bum and lets CPU0
> handle them all, with the exception of irq #0, for some reason.

could you try the irqbalanced daemon for interrupt balancing:

http://people.redhat.com/arjanv/irqbalance/irqbalance-0.05.tar.gz


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