Re: mpc880 linux-2.6.32 slow running processes

Hello Mr. Denk

As I already posted, the patch that was posted before seems to have
solved the problem. Anyway, some answers follow:

On Wed, Jan 5, 2011 at 4:35 PM, Wolfgang Denk [off-list ref] wrote:

Dear Rafael Beims,

In message [ref]=

 you wrote:

quoted

I'm working with an MPC880 board that is supposed to run linux-2.6.32. =

After

quoted

some work, I could get the kernel up and running, mounting a rootfs via
NFS.

2.6.32 is pretty old. =A0Is there any specific reason for not using a
recent kernel version?

The company that I work for uses some kernel versions in favor of
others... Maybe with time we can change that, but for now I need to
use this version.

quoted

The problem that I'm facing now is that when I try to run any process (=

may

quoted

be an ls, cat, or whatever), the response of the process is *very* slow
(something like 10 to 20 seconds for a ls).

This sounds as if only the output to the (serial ?) console port was
slow - typically this happens when there is a problem with interrupt
assignment, and you receive charatcers only after each of these times
out.

quoted

My question to all is, did anyone see something like this already? Besi=

des

We have seen this many times in the past, when interrupts were not
working correctly. =A0I recommend to check youyr device tree settings
for these.

[It would have helped if you had included a log of your kernel's boot
messages.]

quoted

that, what is the status of the linux kernel support for the 8xx platfo=

rm?

It is working and actively maintained, but 8xx is a platform that is
more or less hopelessly obsoleted - nobody uses it in new designs any
more, so there is little work going on with it in recent kernel
versions (at least compared with other architectures).

quoted

Is it being actively tested / used today? I ask this because it seems t=

hat

Yes, it is.

This is very nice, because this way we can be more confident that
everything will work as it should.

quoted

all the information on the internet very aged (forum discussions from 2=

005

quoted

and below mostly).

quoted

Is there something that I can do to try to narrow the cause of the prob=

lem?

Check your interrupts.

Best regards,

Wolfgang Denk

--
DENX Software Engineering GmbH, =A0 =A0 MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
Never underestimate the power of human stupidity =A0when =A0it =A0comes =

=A0to

using technology they don't understand.

Thank you very much for the answers!

Rafael Beims
rbeims@gmail.com
(41) 8873-7565
"What I hear, I forget. What I see, I remember. And what I do, I understand=
."
- Chinese Proverb