Is CFS in Linux broken, or is Xorg broken?

[Stefano Doni]

Hi,
  can you post the output of the top command, or gnome-system-monitor,
showing the most CPU hog process?

What were you doing with your computer, which apps were running?

The fact that only 1 core is used is common, it depends on the application
that is running. Kernel scheduler cannot turn a sequential application into
a parallel one! This is in fact the reason why multicore CPUs are best
suited for servers and not for dekstop usage.

Let me know!

2008/11/25 Fred . <eldmannen at gmail.com>

> I am running Ubuntu 8.10 with kernel 2.6.27, Xorg 7.4, Firefox 3.0.4.
> I have a Intel Core 2 Duo 2.13 GHz system (dual-core, 4gb ram)
> I clicked on a SVG image, and Firefox froze for several minutes. (
> http://en.wikipedia.org/wiki/Image:Unix_history-simple.svg )
>
> GNOME System Monitor said that core #1 used 100% CPU, and that core #2
> used 0-5%.
> But my whole desktop was slow and sluggish and a pain, it was
> crawling, it was very slow.
>
> Something is wrong here. Why was my desktop was so slow and
> unresponsive, when I had a whole core free under no load?
>
> Either the scheduler in the Linux kernel must be doing something
> wrong, or the Xorg must be doing something wrong.
> Which is the culprit? Where do we put the blame?
> Either way, this needs to get fixed. Desktop Linux cant be this way.
>
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