Mobile Intel Pentium(R) 4 - M CPU 2.60GHz - kernel 2.6.3

Mobile Intel Pentium(R) 4 - M CPU 2.60GHz - kernel 2.6.3

[Bob Dobbs]

Hello,

I am currently running kernel 2.6.3 on my Dell Inspiron 8500 laptop.
I disabled all the ACPI and APM options in the kernel.

I have upgraded my bios
I have tried from kernel 2.4.23 up to mm and love-sources and my current kernel 2.6.3.

What happens is during heavy loads my cpu drops from 2.60GHz down to 1.20GHz, this happens for a few minutes, say 5 - 10 at the most. But performance while running a game, puts the game into slow motion. (Which  is weird because 1.20GHz should be more than enough to run all of the  games I currently have). I have read up on the documentation in /usr/src/linux/Documentation, under the "power" and "cpu-freq" but after disabling ACPI and such, those options do not seem to work anymore.

I have also tried running a program called "cpufreqd" which launches at boot time, but once again without ACPI enabled in the kernel this seems  not to work either. Also /sys/devices/system/cpu/cpu0/cpufreq/ has the following files.

cpuinfo_min_freq
cpuinfo_max_freq
scaling_min_freq
scaling_max_freq

I even tried to echo the options at bootup:

echo 2600000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq &
echo 2000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq &

I tried to make those files set at: 2.00GHz min and 2.60GHz max, but something changes them right back to 1.20GHZ no matter what I do.

I am sure I am missing something, but atm I am totally lost.. and I could surely be doing everything wrong to begin with... that is why I am asking for help.

Is there a patch or anything to force the cpu to run at 2.60GHz all the time?

Thank you

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Re: Mobile Intel Pentium(R) 4 - M CPU 2.60GHz - kernel 2.6.3

[Zwane Mwaikambo]

On Fri, 27 Feb 2004, Bob Dobbs wrote:

> I am currently running kernel 2.6.3 on my Dell Inspiron 8500 laptop.
> I disabled all the ACPI and APM options in the kernel.
>
> I have upgraded my bios
> I have tried from kernel 2.4.23 up to mm and love-sources and my current kernel 2.6.3.
>
> What happens is during heavy loads my cpu drops from 2.60GHz down to
> 1.20GHz, this happens for a few minutes, say 5 - 10 at the most. But
> performance while running a game, puts the game into slow motion. (Which
> is weird because 1.20GHz should be more than enough to run all of the
> games I currently have). I have read up on the documentation in
> /usr/src/linux/Documentation, under the "power" and "cpu-freq" but after
> disabling ACPI and such, those options do not seem to work anymore.

Just to clarify, the cpu-freq driver does not operate normally when ACPI
is disabled? Which cpu-freq driver are you using?

> I have also tried running a program called "cpufreqd" which launches at
> boot time, but once again without ACPI enabled in the kernel this seems
> not to work either. Also /sys/devices/system/cpu/cpu0/cpufreq/ has the
> following files.

Out of interest do you have CONFIG_X86_MCE_P4THERMAL enabled?

> cpuinfo_min_freq
> cpuinfo_max_freq
> scaling_min_freq
> scaling_max_freq
>
> I even tried to echo the options at bootup:
>
> echo 2600000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq &
> echo 2000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq &
>
> I tried to make those files set at: 2.00GHz min and 2.60GHz max, but
> something changes them right back to 1.20GHZ no matter what I do.
>
> I am sure I am missing something, but atm I am totally lost.. and I
> could surely be doing everything wrong to begin with... that is why I am
> asking for help.
>
> Is there a patch or anything to force the cpu to run at 2.60GHz all the time?

Re: Mobile Intel Pentium(R) 4 - M CPU 2.60GHz - kernel 2.6.3

[Len Brown]

Perhaps with ACPI disabled you've left CPU frequency control in the
hands of SMM (the BIOS)?  That would be consistent with Linux having no
visibility or conrol over what is going on.  There may be some BIOS
SETUP options to turn it off.

cheers,
-Len

Thu, 2004-02-26 at 19:46, Bob Dobbs wrote:
> Hello,
> 
> I am currently running kernel 2.6.3 on my Dell Inspiron 8500 laptop.
> I disabled all the ACPI and APM options in the kernel.
>
> I have upgraded my bios
> I have tried from kernel 2.4.23 up to mm and love-sources and my
> current kernel 2.6.3.
> 
> What happens is during heavy loads my cpu drops from 2.60GHz down to
> 1.20GHz, this happens for a few minutes, say 5 - 10 at the most. But
> performance while running a game, puts the game into slow motion.
> (Which  is weird because 1.20GHz should be more than enough to run all
> of the  games I currently have). I have read up on the documentation
> in /usr/src/linux/Documentation, under the "power" and "cpu-freq" but
> after disabling ACPI and such, those options do not seem to work
> anymore.
> 
> I have also tried running a program called "cpufreqd" which launches
> at boot time, but once again without ACPI enabled in the kernel this
> seems  not to work either. Also /sys/devices/system/cpu/cpu0/cpufreq/
> has the following files.
> 
> cpuinfo_min_freq
> cpuinfo_max_freq
> scaling_min_freq
> scaling_max_freq
> 
> I even tried to echo the options at bootup:
> 
> echo 2600000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq &
> echo 2000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq &
> 
> I tried to make those files set at: 2.00GHz min and 2.60GHz max, but
> something changes them right back to 1.20GHZ no matter what I do.
> 
> I am sure I am missing something, but atm I am totally lost.. and I
> could surely be doing everything wrong to begin with... that is why I
> am asking for help.
> 
> Is there a patch or anything to force the cpu to run at 2.60GHz all
> the time?
> 
> Thank you

Re: Mobile Intel Pentium(R) 4 - M CPU 2.60GHz - kernel 2.6.3

[Len Brown]

caffine needed...

the fact that MHz goes down under heavy load means the BIOS must be
throttling your CPU to keep it cool.  If you can't disable this BIOS
policy in SETUP, then running Linux with ACPI enabled and the processor
driver loaded should do it.

cheers,
-Len

On Fri, 2004-02-27 at 09:46, Len Brown wrote:
> Perhaps with ACPI disabled you've left CPU frequency control in the
> hands of SMM (the BIOS)?  That would be consistent with Linux having no
> visibility or conrol over what is going on.  There may be some BIOS
> SETUP options to turn it off.
> 
> cheers,
> -Len
> 
> Thu, 2004-02-26 at 19:46, Bob Dobbs wrote:
> > Hello,
> > 
> > I am currently running kernel 2.6.3 on my Dell Inspiron 8500 laptop.
> > I disabled all the ACPI and APM options in the kernel.
> >
> > I have upgraded my bios
> > I have tried from kernel 2.4.23 up to mm and love-sources and my
> > current kernel 2.6.3.
> > 
> > What happens is during heavy loads my cpu drops from 2.60GHz down to
> > 1.20GHz, this happens for a few minutes, say 5 - 10 at the most. But
> > performance while running a game, puts the game into slow motion.
> > (Which  is weird because 1.20GHz should be more than enough to run all
> > of the  games I currently have). I have read up on the documentation
> > in /usr/src/linux/Documentation, under the "power" and "cpu-freq" but
> > after disabling ACPI and such, those options do not seem to work
> > anymore.
> > 
> > I have also tried running a program called "cpufreqd" which launches
> > at boot time, but once again without ACPI enabled in the kernel this
> > seems  not to work either. Also /sys/devices/system/cpu/cpu0/cpufreq/
> > has the following files.
> > 
> > cpuinfo_min_freq
> > cpuinfo_max_freq
> > scaling_min_freq
> > scaling_max_freq
> > 
> > I even tried to echo the options at bootup:
> > 
> > echo 2600000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq &
> > echo 2000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq &
> > 
> > I tried to make those files set at: 2.00GHz min and 2.60GHz max, but
> > something changes them right back to 1.20GHZ no matter what I do.
> > 
> > I am sure I am missing something, but atm I am totally lost.. and I
> > could surely be doing everything wrong to begin with... that is why I
> > am asking for help.
> > 
> > Is there a patch or anything to force the cpu to run at 2.60GHz all
> > the time?
> > 
> > Thank you
> 

Re: Mobile Intel Pentium(R) 4 - M CPU 2.60GHz - kernel 2.6.3

[Disconnect]

Same box, same problem. (Different kernel, 2.4) Its thermal limiting -
you -really- want cpufreq (or at least acpi) so that linux knows whats
going on.  I've found that running 'i8kfan 2 2' (blast fans), hit fn-z
(tell bios to reset fans) and then setting the fans to 1 1 (medium) will
keep it from happening, much of the time.

Alternately, just fn-z might do it, but it'll kick in again..

(Basically, the cooling on this thing sucks under heavy workloads.)

On Thu, 2004-02-26 at 19:46, Bob Dobbs wrote:
> Hello,
> 
> I am currently running kernel 2.6.3 on my Dell Inspiron 8500 laptop.
> I disabled all the ACPI and APM options in the kernel.
> 
> I have upgraded my bios
> I have tried from kernel 2.4.23 up to mm and love-sources and my current kernel 2.6.3.
> 
> What happens is during heavy loads my cpu drops from 2.60GHz down to 1.20GHz, this happens for a few minutes, say 5 - 10 at the most. But performance while running a game, puts the game into slow motion. (Which  is weird because 1.20GHz should be more than enough to run all of the  games I currently have). I have read up on the documentation in /usr/src/linux/Documentation, under the "power" and "cpu-freq" but after disabling ACPI and such, those options do not seem to work anymore.
> 
> I have also tried running a program called "cpufreqd" which launches at boot time, but once again without ACPI enabled in the kernel this seems  not to work either. Also /sys/devices/system/cpu/cpu0/cpufreq/ has the following files.
> 
> cpuinfo_min_freq
> cpuinfo_max_freq
> scaling_min_freq
> scaling_max_freq
> 
> I even tried to echo the options at bootup:
> 
> echo 2600000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq &
> echo 2000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq &
> 
> I tried to make those files set at: 2.00GHz min and 2.60GHz max, but something changes them right back to 1.20GHZ no matter what I do.
> 
> I am sure I am missing something, but atm I am totally lost.. and I could surely be doing everything wrong to begin with... that is why I am asking for help.
> 
> Is there a patch or anything to force the cpu to run at 2.60GHz all the time?
> 
> Thank you
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Re: Mobile Intel Pentium(R) 4 - M CPU 2.60GHz - kernel 2.6.3

[Robin Rosenberg]

On Friday 27 February 2004 14:14, Zwane Mwaikambo wrote:
> On Fri, 27 Feb 2004, Bob Dobbs wrote:
> 
> > I am currently running kernel 2.6.3 on my Dell Inspiron 8500 laptop.
> > I disabled all the ACPI and APM options in the kernel.
Same kernel or Mandrake 10 beta which 2.6.3 + godknowswat. Acpi enabled.
whether the acpi module is actually loaded or not does not seem to affect anything,
but acpi is on according to dmesg.

> > What happens is during heavy loads my cpu drops from 2.60GHz down to
> > 1.20GHz, this happens for a few minutes, say 5 - 10 at the most. But

it doesn't appear to matter, but I have "strange" peformance problems that may
or may not be the same. Suddenly some things are very slow, welll 1.2GHz is still
fast, but..  How do I see the actual CPU frequencey? cat /proc/sys/cpu/0/* gives 
2000000 0 0 where 2GHz is max on this machine. I have not seen speed as anything
but 2GHZ.

One of the strangenesses similar to Bob's problem is that games run slow, i.e. blobwars 
have not trouble running fast on much slower machines, but on this one it runs in 
slow-motion. Another program that displays this problem is eclipse, although I don't know
if it's related.

> Just to clarify, the cpu-freq driver does not operate normally when ACPI
> is disabled? Which cpu-freq driver are you using?
> 
> > I have also tried running a program called "cpufreqd" which launches at
> > boot time, but once again without ACPI enabled in the kernel this seems
> > not to work either. Also /sys/devices/system/cpu/cpu0/cpufreq/ has the
> > following files.
> 
> Out of interest do you have CONFIG_X86_MCE_P4THERMAL enabled?
Yes.

> >
> > I tried to make those files set at: 2.00GHz min and 2.60GHz max, but
> > something changes them right back to 1.20GHZ no matter what I do.

There's a setup for enabling/disabling speedstep that says sets the frequency
to the lowest if "disabled".

-- robin

Re: Mobile Intel Pentium(R) 4 - M CPU 2.60GHz - kernel 2.6.3

[Pavel Machek]

Hi!

> What happens is during heavy loads my cpu drops from 2.60GHz down to 1.20GHz, this happens for a few minutes, say 5 - 10 

Overheat?

> I even tried to echo the options at bootup:
> 
> echo 2600000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq &
> echo 2000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq &
> 
> I tried to make those files set at: 2.00GHz min and 2.60GHz max, but something changes them right back to 1.20GHZ no matter what I do.
> 

What about forcing it at 1GHz during boot, instead?

> Is there a patch or anything to force the cpu to run at 2.60GHz all the time?
> 


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