On 1/10/06, Martin Bligh <[email protected]> wrote:
> Josef Sipek wrote:
> > On Tue, Jan 10, 2006 at 12:14:42PM +0100, Jesper Juhl wrote:
> >
> >>Do I need any userspace tools in addition to CONFIG_IRQBALANCE?
> >
> >
> > Last I checked, yes you do need "irqbalance" (at least that's what
> > the package is called in debian.
>
> Nope - you need the kernel option turned on OR the userspace daemon,
> not both.
>
Ok, good to know.
> If you're not generating interrupts at a high enough rate, it won't
> rotate. That's deliberate.
>
Hmm, and what would count as "a high enough rate"?
I just did a small test with thousands of ping -f's through my NIC
while at the same time giving the disk a good workout with tons of
find's, sync's & updatedb's - that sure did drive up the number of
interrupts and my load average went sky high (amazingly the box was
still fairly responsive):
root@dragon:/home/juhl# uptime
22:59:58 up 12:43, 1 user, load average: 1015.48, 715.93, 429.07
but, not a single interrupt was handled by CPU1, they all went to CPU0.
Do you have a good way to drive up the nr of interrupts above the
treshhold for balancing?
--
Jesper Juhl <[email protected]>
Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please http://www.expita.com/nomime.html
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