On 1/10/06, Martin Bligh <mbligh@xxxxxxxxxx> 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?