Arjan van de Ven wrote:
>> It'd be nice if we could just teach the userspace balancer to not try to
>> move perpcu IRQs?
>>
>> otoh, the patch is super-cheap. Arjan?
>
> I can fix irqbalance no problem, however I like the kernel approach as
> well, since it's not just irqbalance that moves irqs, sysadmins tend to
> do it as well.... so how about both?
Thanks for positive comments.
> One thing we probably should do, and that would help irqbalance
> immensely, is to export a bitmask for which cpus an interrupt CAN go to,
> next to where the current binding interface is. I'll check into that
>
> Hidetoshi: would it be possible to send me a /proc/interrupts file of
> that machine?
Here you are.
This machine is not special. I guess all ia64 machine will show
few or more but almost same lines. CPEI is #30.
$ cat /proc/interrupts
CPU0 CPU1
28: 0 0 LSAPIC cpe_poll
29: 0 0 LSAPIC cmc_poll
30: 0 0 IO-SAPIC-level cpe_hndlr
31: 0 0 LSAPIC cmc_hndlr
34: 4643 1881067 IO-SAPIC-edge ide0
39: 0 0 IO-SAPIC-level acpi
45: 148 560 IO-SAPIC-edge serial
48: 0 0 IO-SAPIC-level uhci_hcd
49: 0 0 IO-SAPIC-level uhci_hcd
50: 0 0 IO-SAPIC-level ehci_hcd
51: 21131 1257790 IO-SAPIC-level eth0
53: 21778 458314 IO-SAPIC-level ioc0
54: 0 44 IO-SAPIC-level ioc1
232: 0 0 LSAPIC mca_rdzv
238: 0 0 LSAPIC perfmon
239: 214832233 214832003 LSAPIC timer
240: 0 0 LSAPIC mca_wkup
254: 209193 611 LSAPIC IPI
ERR: 0
Thanks,
H.Seto
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