"why is my Linux so damn slow?"

Rick Sewill rsewill at gmail.com
Sat Feb 12 17:01:49 UTC 2011


On Saturday, February 12, 2011 09:53:28 am M. Fioretti wrote:
> On Sat, Feb 12, 2011 15:25:54 PM +0000, Alan Cox (alan at lxorguk.ukuu.org.uk) 
wrote:
> > There are lots of other things it could be, unfortunately you've not
> > provided any really useful information on the machine, you've not
> > provided any dumps of stuff that would be useful
> 
> I have now, in comments to the article. I certainly did not expect to
> get the complete answer in one step (as I wrote at the end of that
> page), I wrote everything I thought useful in that page. And I had put
> "little details like which X server is being run" in that page since
> the beginning, in the form I thought it could be enough, ie attaching
> the installed RPM packages. And I also _acknowledged_ right there that
> it couldn't be enough "so please tell me what other inputs do you
> need, thanks".
> 
> > On an 8GB box with Intel onboard video even Gnome is usable so
> > something is definitely wrong in your specific setup
> 
> exactly my point :-) I am sure a big part of the problem is
> Firefox+Flash, but can that be the WHOLE problem? As I wrote in the
> article, it's not like killing Firefox (while it does improve things)
> solves everything.
> 
> Dmesg output is pasted below. Boot, reboot or not it makes no
> difference. let it go ten minutes, and it starts behaving like
> that.
> 
> Thanks again for your quick support! Just ask for more tests if
> needed.
> 
> Marco
> 
> [    0.000000] Initializing cgroup subsys cpuset
> [    0.000000] Initializing cgroup subsys cpu
> [    0.000000] Linux version 2.6.35.10-74.fc14.x86_64
....

That is something I hadn't thought of.

What devices are connected to your system?

Perhaps a Linux driver, for a device is having problems.
Perhaps a device is generating lots of interrupts.

Can you disconnect any devices and see if the slowness goes away?

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