Re: irq balancing: performance disaster

Arjan van de Ven (arjanv@redhat.com)
11 May 2003 11:07:47 +0200


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On Sun, 2003-05-11 at 01:18, Jos Hulzink wrote:
> Hi,
>=20
> While tackling bug 699, it became clear to me that irq balancing is the c=
ause=20
> of the performance problems I, and all people using the SMP kernel Mandra=
ke=20
> 9.1 ships, are dealing with. I got the problems with 2.5.69 too. After=20
> disabling irq balancing, the system is remarkably faster, and much more=20
> responsive.=20
>=20
> For those interested in the issue, please look at bug 699.

please try the following app instead:

http://people.redhat.com/arjanv/irqbalance/

the in kernel irqbalancer in 2.4 kernels has some worst case behaviors
at least, and the userspace implementation avoids those.

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