irqbalance runs only once; is that right?

[Andre Costa]

Hi Aaron,

On Tue, Aug 19, 2008 at 17:31, Aaron Konstam <akonstam at sbcglobal.net> wrote:

> On Tue, 2008-08-19 at 16:35 -0300, Andre Costa wrote:
> > Hi,
> >
> > I just realized that, even though /etc/sysconfig/irqbalance has
> >
> > ONESHOT=
> >
> > irqbalance runs only once and then bails out (at least it seems to be
> > gracefully). This is what happens if I try to run it by hand:
> >
> > root:~# irqbalance --debug
> > Package 0:  cpu mask is 00000003 (workload 0)
> >         Cache domain 0: cpu mask is 00000003  (workload 0)
> >                 CPU number 0  (workload 0)
> >                 CPU number 1  (workload 0)
> > Interrupt 20 (class ethernet) has workload 1
> > Interrupt 8 (class timer) has workload 0
> > Interrupt 0 (class timer) has workload 0
> > Interrupt 17 (class storage) has workload 21
> > Interrupt 21 (class storage) has workload 0
> > Interrupt 16 (class legacy) has workload 123
> > Interrupt 22 (class legacy) has workload 81
> > Interrupt 1 (class legacy) has workload 1
> > Interrupt 23 (class legacy) has workload 0
> > Interrupt 19 (class legacy) has workload 0
> > Interrupt 18 (class legacy) has workload 0
> > Interrupt 9 (class legacy) has workload 0
> > Interrupt 6 (class legacy) has workload 0
> > Interrupt 4 (class other) has workload 0
> >
> >
> >
> >
> -----------------------------------------------------------------------------
> > IRQ delta is 1892
> > Package 0:  cpu mask is 00000003 (workload 1154)
> >         Cache domain 0: cpu mask is 00000003  (workload 1153)
> >                 CPU number 0  (workload 508)
> >                   Interrupt 17 (storage/91)
> >                   Interrupt 22 (legacy/412)
> >                   Interrupt 23 (legacy/0)
> >                   Interrupt 18 (legacy/0)
> >                   Interrupt 6 (legacy/0)
> >                 CPU number 1  (workload 645)
> >                   Interrupt 20 (ethernet/10)
> >                   Interrupt 21 (storage/8)
> >                   Interrupt 16 (legacy/621)
> >                   Interrupt 19 (legacy/0)
> >                   Interrupt 9 (legacy/0)
> >                   Interrupt 1 (legacy/0)
> >   Interrupt 4 (other/0)
> >
> > After this, it just quits with status 0, and /var/run/irqbalance.pid
> > is removed.
> >
> > Is this normal behavior? (manpage says it should keep balancing IRQs
> > each 10s if ONESHOT is not set)
> >
> > Version is irqbalance-0.55-9.fc9.x86_64
> >
> > Regards,
> >
> > Andre
> That is interesting because the big leap forward in 2.6.x kernels is to
> have scheduling lists that balance the work more efficiently among cpus.
>

You mean that irqbalance isn't really needed with 2.6 kernels? I'm not sure
I need to run it, but since I am, it feels strange that it stops after the
first run, even if (apparently) not told to do so...
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