No life from acpi-cpufreq, Pentium D 930, x86_64

No life from acpi-cpufreq, Pentium D 930, x86_64

[Bryan O'Sullivan]

I'm running the 2.6.17-1.2174_FC5 x86_64 kernel from FC5 updates on a
Dell PowerEdge 830 server with a Pentium D 930 inside.  I can modprobe
acpi_cpufreq, but it doesn't do anything - there are no kernel log
messages, no new sysfs files to look at, nothing in /proc/acpi.

cpufreq-info tells me that I have no cpufreq support, but I had kind of
figured that out already :-(

Is there something more I should be doing?

	<b

Re: No life from acpi-cpufreq, Pentium D 930, x86_64

[Dave Jones]

On Tue, Sep 19, 2006 at 09:55:12PM -0700, Bryan O'Sullivan wrote:
 > I'm running the 2.6.17-1.2174_FC5 x86_64 kernel from FC5 updates on a
 > Dell PowerEdge 830 server with a Pentium D 930 inside.  I can modprobe
 > acpi_cpufreq, but it doesn't do anything - there are no kernel log
 > messages, no new sysfs files to look at, nothing in /proc/acpi.
 > 
 > cpufreq-info tells me that I have no cpufreq support, but I had kind of
 > figured that out already :-(
 > 
 > Is there something more I should be doing?
 
Does the CPU actually support frequency scaling?
What does /proc/cpuinfo say ?

	Dave

Re: No life from acpi-cpufreq, Pentium D 930, x86_64

[Bryan O'Sullivan]

On Wed, 2006-09-20 at 01:02 -0400, Dave Jones wrote:

> Does the CPU actually support frequency scaling?

It would appear not (see below).  How strange.

> What does /proc/cpuinfo say ?

Very little:

    power management:

I suppose there's not much I can do then.

Thanks,

	<b

Re: No life from acpi-cpufreq, Pentium D 930, x86_64

[Dave Jones]

On Tue, Sep 19, 2006 at 10:11:15PM -0700, Bryan O'Sullivan wrote:
 > On Wed, 2006-09-20 at 01:02 -0400, Dave Jones wrote:
 > 
 > > Does the CPU actually support frequency scaling?
 > 
 > It would appear not (see below).  How strange.
 > 
 > > What does /proc/cpuinfo say ?
 > 
 > Very little:
 > 
 >     power management:
 > 
 > I suppose there's not much I can do then.

The important line is 'flags'. Does that have eist ?

	Dave

Re: No life from acpi-cpufreq, Pentium D 930, x86_64

[Bryan O'Sullivan]

On Wed, 2006-09-20 at 01:13 -0400, Dave Jones wrote:

> The important line is 'flags'. Does that have eist ?

Here's the flags line.  No sign of eist, alas:

flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall
nx lm constant_tsc pni monitor ds_cpl vmx est cid cx16 xtpr lahf_lm

Thanks,

	<b

RE: No life from acpi-cpufreq, Pentium D 930, x86_64

[Pallipadi, Venkatesh]

>-----Original Message-----
>From: cpufreq-bounces@lists.linux.org.uk 
>[mailto:cpufreq-bounces@lists.linux.org.uk] On Behalf Of Bryan 
>O'Sullivan
>Sent: Tuesday, September 19, 2006 10:24 PM
>To: Dave Jones
>Cc: cpufreq@lists.linux.org.uk
>Subject: Re: No life from acpi-cpufreq, Pentium D 930, x86_64
>
>On Wed, 2006-09-20 at 01:13 -0400, Dave Jones wrote:
>
>> The important line is 'flags'. Does that have eist ?
>
>Here's the flags line.  No sign of eist, alas:
>
>flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
>mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall
>nx lm constant_tsc pni monitor ds_cpl vmx est cid cx16 xtpr lahf_lm
>
>Thanks,
>
>	<b

There was a bug that got introduced in recent kernels and that was fixed
with this patch here:
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=c
ommit;h=a0cc621f52a4dea10c34eeed6eb4e36b26db63dc

Can you try this patch and recompile your kernel and see whether that
helps?

Thanks,
Venki

RE: No life from acpi-cpufreq, Pentium D 930, x86_64

[Bryan O'Sullivan]

On Wed, 2006-09-20 at 01:42 -0700, Pallipadi, Venkatesh wrote:

> There was a bug that got introduced in recent kernels and that was fixed
> with this patch here:
> http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=c
> ommit;h=a0cc621f52a4dea10c34eeed6eb4e36b26db63dc
> 
> Can you try this patch and recompile your kernel and see whether that
> helps?

I can try it, sure, but I'm not getting any error messages when I load
acpi-cpufreq, so it's not clear to me that I should expect this patch to
do anything.

Does the Pentium D 930 actually support frequency scaling?

	<b

Re: No life from acpi-cpufreq, Pentium D 930, x86_64

[Dave Jones]

On Wed, Sep 20, 2006 at 08:34:35AM -0700, Bryan O'Sullivan wrote:
 > On Wed, 2006-09-20 at 01:42 -0700, Pallipadi, Venkatesh wrote:
 > 
 > > There was a bug that got introduced in recent kernels and that was fixed
 > > with this patch here:
 > > http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=c
 > > ommit;h=a0cc621f52a4dea10c34eeed6eb4e36b26db63dc
 > > 
 > > Can you try this patch and recompile your kernel and see whether that
 > > helps?
 > 
 > I can try it, sure, but I'm not getting any error messages when I load
 > acpi-cpufreq, so it's not clear to me that I should expect this patch to
 > do anything.
 > 
 > Does the Pentium D 930 actually support frequency scaling?

You have 'est' in the flags, so yes.  speedstep-centrino might
possibly work too.

	Dave

RE: No life from acpi-cpufreq, Pentium D 930, x86_64

[Pallipadi, Venkatesh]

>-----Original Message-----
>From: Dave Jones [mailto:davej@redhat.com] 
>Sent: Wednesday, September 20, 2006 8:36 AM
>To: Bryan O'Sullivan
>Cc: Pallipadi, Venkatesh; cpufreq@lists.linux.org.uk
>Subject: Re: No life from acpi-cpufreq, Pentium D 930, x86_64
>
>On Wed, Sep 20, 2006 at 08:34:35AM -0700, Bryan O'Sullivan wrote:
> > On Wed, 2006-09-20 at 01:42 -0700, Pallipadi, Venkatesh wrote:
> > 
> > > There was a bug that got introduced in recent kernels and 
>that was fixed
> > > with this patch here:
> > > 
>http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.
>6.git;a=c
> > > ommit;h=a0cc621f52a4dea10c34eeed6eb4e36b26db63dc
> > > 
> > > Can you try this patch and recompile your kernel and see 
>whether that
> > > helps?
> > 
> > I can try it, sure, but I'm not getting any error messages 
>when I load
> > acpi-cpufreq, so it's not clear to me that I should expect 
>this patch to
> > do anything.
> > 
> > Does the Pentium D 930 actually support frequency scaling?
>
>You have 'est' in the flags, so yes.  speedstep-centrino might
>possibly work too.
>

Yes. As Dave said your processor supports speedstep. Whether your
platform (BIOS) supports it or not is the next question. 

The patch will make acpi-cpufreq either succeed or fail cleanly rather
than hanging in there without doing anything. And again as Dave
mentioned, try both acpi-cpufreq and speedstep-centrino drivers. If you
are recompiling the kernel, it will be great if you can CONFIG
CPU_FREQ_DEBUG and pass cpufreq.debug=3 at boot parameter. That will
give some more debug messages that will help say where exactly it is
failing.

Thanks,
Venki

Re: No life from acpi-cpufreq, Pentium D 930, x86_64

[Jeremy Fitzhardinge]

Bryan O'Sullivan wrote:
> flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
> mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall
> nx lm constant_tsc pni monitor ds_cpl vmx est cid cx16 xtpr lahf_lm
>   

EIST is listed as "est" here, so it is present.  speedstep-centrino 
should be able to do something with this.

    J

RE: No life from acpi-cpufreq, Pentium D 930, x86_64

[Bryan O'Sullivan]

On Wed, 2006-09-20 at 09:24 -0700, Pallipadi, Venkatesh wrote:

> Yes. As Dave said your processor supports speedstep. Whether your
> platform (BIOS) supports it or not is the next question. 
> 
> The patch will make acpi-cpufreq either succeed or fail cleanly rather
> than hanging in there without doing anything.

I built 2.6.18 and booted into it with cpufreq.debug=3, and got not a
squeak out of it.  There's no cpufreq-related info in /var/log/messages
at all.

>  And again as Dave
> mentioned, try both acpi-cpufreq and speedstep-centrino drivers.

I'm using the Fedora kernel config, which builds acpi-cpufreq as a
module and speedstep-centrino built-in, but no joy.

I'll try building the lot as modules, and see how that goes.

Here's what's in my .config with the setup that prints nothing at all:

CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=y
CONFIG_CPU_FREQ_DEBUG=y
CONFIG_CPU_FREQ_STAT=m
CONFIG_CPU_FREQ_STAT_DETAILS=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=m
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=m
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=m
CONFIG_X86_POWERNOW_K8=y
CONFIG_X86_POWERNOW_K8_ACPI=y
CONFIG_X86_SPEEDSTEP_CENTRINO=y
CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI=y
CONFIG_X86_ACPI_CPUFREQ=m
# CONFIG_X86_ACPI_CPUFREQ_PROC_INTF is not set
# CONFIG_X86_SPEEDSTEP_LIB is not set

	<b

RE: No life from acpi-cpufreq, Pentium D 930, x86_64

[Pallipadi, Venkatesh]

>-----Original Message-----
>From: Bryan O'Sullivan [mailto:bos@serpentine.com] 
>Sent: Wednesday, September 20, 2006 11:00 AM
>To: Pallipadi, Venkatesh
>Cc: Dave Jones; cpufreq@lists.linux.org.uk
>Subject: RE: No life from acpi-cpufreq, Pentium D 930, x86_64
>
>On Wed, 2006-09-20 at 09:24 -0700, Pallipadi, Venkatesh wrote:
>
>> Yes. As Dave said your processor supports speedstep. Whether your
>> platform (BIOS) supports it or not is the next question. 
>> 
>> The patch will make acpi-cpufreq either succeed or fail 
>cleanly rather
>> than hanging in there without doing anything.
>
>I built 2.6.18 and booted into it with cpufreq.debug=3, and got not a
>squeak out of it.  There's no cpufreq-related info in /var/log/messages
>at all.
>
>>  And again as Dave
>> mentioned, try both acpi-cpufreq and speedstep-centrino drivers.
>
>I'm using the Fedora kernel config, which builds acpi-cpufreq as a
>module and speedstep-centrino built-in, but no joy.
>
>I'll try building the lot as modules, and see how that goes.
>
>Here's what's in my .config with the setup that prints nothing at all:
>
>CONFIG_CPU_FREQ=y
>CONFIG_CPU_FREQ_TABLE=y
>CONFIG_CPU_FREQ_DEBUG=y
>CONFIG_CPU_FREQ_STAT=m
>CONFIG_CPU_FREQ_STAT_DETAILS=y
># CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
>CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
>CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
>CONFIG_CPU_FREQ_GOV_POWERSAVE=m
>CONFIG_CPU_FREQ_GOV_USERSPACE=y
>CONFIG_CPU_FREQ_GOV_ONDEMAND=m
>CONFIG_CPU_FREQ_GOV_CONSERVATIVE=m
>CONFIG_X86_POWERNOW_K8=y
>CONFIG_X86_POWERNOW_K8_ACPI=y
>CONFIG_X86_SPEEDSTEP_CENTRINO=y
>CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI=y
>CONFIG_X86_ACPI_CPUFREQ=m
># CONFIG_X86_ACPI_CPUFREQ_PROC_INTF is not set
># CONFIG_X86_SPEEDSTEP_LIB is not set
>
>	<b

Dump out acpidump from this system and send it to me. With that we can
check what speedstep info BIOS is giving on this platform. You can find
acpidump in latest version of pmtools here.
http://www.kernel.org/pub/linux/kernel/people/lenb/acpi/utils/

You can also open a bugzilla at bugme.osdl.org (ACPI->Processor/Power
category) and attach the information there. It will be easier to track
the issue that way.

Thanks,
Venki

RE: No life from acpi-cpufreq, Pentium D 930, x86_64

[Bryan O'Sullivan]

On Wed, 2006-09-20 at 11:07 -0700, Pallipadi, Venkatesh wrote:

> Dump out acpidump from this system and send it to me. With that we can
> check what speedstep info BIOS is giving on this platform.

I've done that, and attached the output to the Bugzilla bug; see below.

> You can also open a bugzilla at bugme.osdl.org (ACPI->Processor/Power
> category) and attach the information there.

'tis done, and I've CCed you on the bug:
http://bugzilla.kernel.org/show_bug.cgi?id=7173

Thanks for the help,

	<b