Re: RFC: IRQ affinity (aka interrupt routing)

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Thu, Aug 21, 2014 at 10:50:53AM +0900, Kengo NAKAHARA wrote:
> Hi,
> 
> (2014/08/20 18:46), Martin Husemann wrote:
> >On Wed, Aug 20, 2014 at 06:38:35PM +0900, Kengo NAKAHARA wrote:
> >>I use IRQ number to idetify interrupts. The number is shown "IRQ" column.
> >>Actually, the value equals to struct intrsource.is_pin.
> >
> >Isn't a string (like in vmstat -i output) better?
> 
> I think IRQ number is better. Because it is short :)
> Therefore, vmstat -iv output is differ little from IRQ number. For example,
> here is the output of my machine
> ====================
> interrupt                                     total     rate
> TLB shootdown                                   732        0
> cpu0 timer                                   151842      100
> ioapic0 pin 9                                     0        0
> ioapic0 pin 20                                    0        0
> ioapic0 pin 21                                    0        0
> ioapic0 pin 22                                    0        0
> ioapic0 pin 23                                 1816        1
> ioapic0 pin 19                                 1807        1
> ioapic0 pin 18                                    0        0
> ioapic0 pin 4                                     0        0
> ioapic0 pin 3                                     0        0
> Total                                        156197      103
> ====================
> Currently, intrctl list does not show "TLB shootdown" and "cpu0 timer".
> Furthermore, "ioapic0 pin 9" of vmstat -iv equals to "9" of intrctl list,
> "ioapic0 pin 20" of vmstat -iv equals to "20" of intrctl list, and so on.

On a x86 server here:
interrupt                                     total     rate
TLB shootdown                             788900019      295
cpu0 timer                                265870470       99
ioapic0 pin 9                                     0        0
ioapic0 pin 16                           1491906220      557
ioapic1 pin 14                            153885893       57
ioapic0 pin 17                                 2731        0
ioapic3 pin 0                                    13        0
ioapic3 pin 1                                    14        0
ioapic0 pin 21                                  789        0
ioapic0 pin 20                             15285596        5
ioapic0 pin 14                                    1        0
ioapic0 pin 4                                     0        0
ioapic0 pin 3                                   353        0
Total                                    2715852099     1015

Notice we have both 'ioapic0 pin 14' and 'ioapic1 pin 14',
what number would be used for intrctl in this case ?

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--