Re: userspace irq balancer

Arjan van de Ven (arjanv@redhat.com)
21 May 2003 22:16:01 +0200


This is a MIME-formatted message. If you see this text it means that your
E-mail software does not support MIME-formatted messages.

--=_courier-14916-1053548362-0001-2
Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable

On Wed, 2003-05-21 at 18:31, James Bottomley wrote:
> I'm interested in using this for voyager. However, I have a problem in
> that voyager may have CPUs that can't accept interrupts (this is global
> on voyager, but may be per-interrupt on NUMA like systems). I think
> before we move to a userspace solution, some thought about how to cope
> with this is needed.
>=20
> I have several suggestions:
>=20
> 1. Place the masks into /proc/irq/<n>/smp_affinity at start of day and
> have the userspace irqbalancer take this as the maximal mask
>=20
> 2. Have a separate file /proc/irq/<n>/mask(?) to expose the mask always
>=20
> 3. Some other method...

I would prefer the second method.

--=_courier-14916-1053548362-0001-2
Content-Type: application/pgp-signature; name="signature.asc"
Content-Transfer-Encoding: 7bit
Content-Description: This is a digitally signed message part

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.2 (GNU/Linux)

iD8DBQA+y96AxULwo51rQBIRAsr0AKCKTznvHPgPEc7W9aTN8Rd0Vu4SQgCfRksV
V6my+OA4FIGNuXuIj9t82H4=
=Dmpm
-----END PGP SIGNATURE-----

--=_courier-14916-1053548362-0001-2--