Major 2.4 / 2.{5|6}-smp Scheduler Slow-ness

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Date:	Wed, 30 Jul 2003 20:27:27 -0400
To: linux-kernel@vger.kernel.org

Ok, first of all, I have never been able to run a 2.4 kernel on this
machine, it runs _very_ slow. By slow, i mean it takes literally HOURS
to boot. I have tried 2.4.20,2.4.21, and also both with the openmosix
patches.

Now, the 2.5/6 kernel runs beautifully, so i have been running both
vanilla, and vanilla+mm patches, both run fine. Although, using the smp
scheduler makes it do the exact same thing as 2.4, albeit a little
faster. So this leads me into thinking *very*
much so that this is a scheduler issue.

When i finally let the 2.6.0-test2-mm1 boot with smp support, the cpu
usage is ALWAYS at 75-80% System. And this is with all tasks sleeping
except for top.

I have brought this up many times with people on irc and such, and we
are all stumped. So, i am bringing this up to your attention. i have
attached the dmesg output ( 2.6.0-test2-mm1+smp ), lspci output, my
.config, and my /proc/cpuinfo output. If you need anymore information, I
will be happy to provide =).

Also -- another thing to bring up with the scheduler problems. I have an
onboard ethernet port (8139too), which only pukes with an error something like
SCIO*: function not found ( replace wildcard ), if you want the full
output of it, i can boot into it again and copy/paste it. Now, it is
very important to realize that it only fails at the same times as i am
having the issue above, otherwise it works fine.

I am ready to try anything out to fix this issue, so if you have any
suggestions, I shall try them.

Thanks.

>> Trevor Joynson <admin@trevorj.com>

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• text/plain attachment: config-2.6

• text/plain attachment: dmesg-smp.out

• text/plain attachment: lspci.out

• text/plain attachment: cpuinfo.out

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