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

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

I tend to follow new kernel feature from 'the H online' and I don't recall seeing something like this was ever mentioned. I know current default sched is the BFS, but it doesn't mention such behavior.

A little test I did was opening a youtube video (I use chrome), the cpu was almost 100% but, in htop. around 70% was show as low pri. If I run another program, lets say VirtualBox, they start to share the same core, instead of using another one that is free.

This behavior seems buggy to me. I've been using Debian since Woody, this desktop has almost 1 and a half year, and this started to happen when I installed 3.1

cheers

2012/4/29 Ben Hutchings <ben@decadent.org.uk>

On Sun, 2012-04-29 at 01:25 -0300, Wido wrote:
> Package: linux-2.6
> Version: 3.2.15-1
> Severity: important
>
> Dear Maintainer,
> I'm seeing some unusual behaviour in my 4 cores desktop and can't figure out
> what's going on. Currently I'm using latest 'testing' kernel, but I've noticed
> this behavior in all 3.x debian stock kernel series.
>
> Even when the kernels have SMP enabled, only one of my 4 cores gets all the CPU
> affinity, distributing the load only when it's at 100%.

[...]

Why do you think this is a bug?

Ben.

--
Ben Hutchings
I haven't lost my mind; it's backed up on tape somewhere.

--
Wido