Bug#670797: linux-image-3.2.0-2-686-pae: CPU load not being distributed

[Wido <wido.gg@gmail.com>]

Sorry I haven't answered before, I've missed your mail in my inbox :$

I have checked that kernel parameter using 'sysctl -a | grep iso', but haven't find such option. Did I searched what you asked?

I'm more fan of K stuff, but currently I use E17 compiled by myself, login using KDM. This setup has been the same for the last 5 years at least and I never used affinity for any of them.

At this moment I've hacked my system using a cron entry that changes all processes affinity to 'f' every minute.

I'm kind of lost with this :S

2012/5/2 Ben Hutchings <ben@decadent.org.uk>

On Wed, 2012-05-02 at 20:21 -0300, Wido wrote:
> Hi again,
>
>
> Ok, I can confirm this is recurrent. I have rebooted my desktop
> without changing anything (but checking default_smp_affinitty is set
> to 'f').

Are you talking about /proc/irq/default_smp_affinity?  That only affects
IRQ handlers, not tasks.

> After reboot, I checked smp affinitty again, it's still in 'f'.
> However, all the apps I start keep having the same behaviour and they
> start with affinitty 8.

[...]

The only way I can see that this would happen is:

- Using the kernel parameter isolcpus
- Setting affinity for a process that is the ancestor of your session,
 e.g. gdm

Ben.


--
Ben Hutchings
Design a system any fool can use, and only a fool will want to use it.

--
Wido