ACPI PM Timer

ACPI PM Timer

[Grover, Andrew]

So 2.6.4 will support the option of using the PM timer as the main
kernel timesource!

This is great. This has been on my personal wish list for, oh, about 4
years now. I just wanted to say thanks to Dominik, John, and Dmitry for
making it happen.

Regards -- Andy

-----------------------------
Andrew Grover
Intel Labs / Mobile Architecture
andrew.grover-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org



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Re: ACPI PM Timer

[Tomasz Ciolek]

That has been there for quite a while - since 2.6.1-rc something or
another....

TMC

On Tue, Feb 24, 2004 at 01:08:08PM -0800, Grover, Andrew wrote:
> So 2.6.4 will support the option of using the PM timer as the main
> kernel timesource!
> 
> This is great. This has been on my personal wish list for, oh, about 4
> years now. I just wanted to say thanks to Dominik, John, and Dmitry for
> making it happen.
> 
> Regards -- Andy
> 
> -----------------------------
> Andrew Grover
> Intel Labs / Mobile Architecture
> andrew.grover-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org
> 
> 
> 
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> _______________________________________________
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-- 
Tomasz M. Ciolek	
*******************************************************************************
 tmc at dreamcraft dot com dot au or tmc at goldweb dot com dot au 	
*******************************************************************************
	GPG Key ID: 0x41C4C2F0  Key available on www.pgp.net	
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  Everything falls under the law of change;	
  Like a dream, a phantom, a bubble, a shadow,
  like dew of flash of lightning.
  You should contemplate like this. 


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Re: ACPI PM Timer

[Andi Kleen]

On Tue, 24 Feb 2004 13:08:08 -0800
"Grover, Andrew" <andrew.grover-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> wrote:

> So 2.6.4 will support the option of using the PM timer as the main
> kernel timesource!

For i386 at least, for x86-64 I think it will still need a bit of work ...

-Andi


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RE: ACPI PM Timer

[Ow Mun Heng]

> -----Original Message-----
> From: Grover, Andrew [mailto:andrew.grover-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org]
> Sent: Wednesday, February 25, 2004 5:08 AM
> To: Dominik Brodowski; john stultz
> Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> Subject: [ACPI] ACPI PM Timer
> 
> 
> So 2.6.4 will support the option of using the PM timer as the main
> kernel timesource!


Hi,

may I know what's the use of this PM timer? Currently I'm using RTC on 
kernel 2.6.3


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Re: ACPI PM Timer

[Nate Lawson]

On Tue, 24 Feb 2004, Grover, Andrew wrote:
> So 2.6.4 will support the option of using the PM timer as the main
> kernel timesource!
>
> This is great. This has been on my personal wish list for, oh, about 4
> years now. I just wanted to say thanks to Dominik, John, and Dmitry for
> making it happen.
>
> Regards -- Andy

Welcome to the club!  :)

-Nate


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Re: ACPI PM Timer

[Bruno Ducrot]

On Sat, Feb 28, 2004 at 05:48:07PM -0800, Nate Lawson wrote:
> On Tue, 24 Feb 2004, Grover, Andrew wrote:
> > So 2.6.4 will support the option of using the PM timer as the main
> > kernel timesource!
> >
> > This is great. This has been on my personal wish list for, oh, about 4
> > years now. I just wanted to say thanks to Dominik, John, and Dmitry for
> > making it happen.
> >
> > Regards -- Andy
> 
> Welcome to the club!  :)
> 

Well, it seems to be a little more 'basic' than the one on the FreeBSD
in fact.

-- 
Bruno Ducrot

--  Which is worse:  ignorance or apathy?
--  Don't know.  Don't care.


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RE: ACPI PM Timer

[Ow Mun Heng]

> -----Original Message-----
> From: Bruno Ducrot [mailto:ducrot-kk6yZipjEM5g9hUCZPvPmw@public.gmane.org]
> Sent: Tuesday, March 02, 2004 1:39 AM
> To: Nate Lawson
> Cc: Grover, Andrew; Dominik Brodowski; john stultz;
> acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> Subject: Re: [ACPI] ACPI PM Timer
> 
> 
> On Sat, Feb 28, 2004 at 05:48:07PM -0800, Nate Lawson wrote:
> > On Tue, 24 Feb 2004, Grover, Andrew wrote:
> > > So 2.6.4 will support the option of using the PM timer as the main
> > > kernel timesource!
> > >
> > > This is great. This has been on my personal wish list 
> for, oh, about 4
> > > years now. I just wanted to say thanks to Dominik, John, 
> and Dmitry for
> > > making it happen.
> > >
> > > Regards -- Andy
> > 
> > Welcome to the club!  :)
> > 
> 
> Well, it seems to be a little more 'basic' than the one on the FreeBSD
> in fact.


I know this is bad form(to ask twice).. but... 
What is this ACPI PM timesource?

Since I have this "TSC cannot be used as a timesource" when running battery.

(refer other post with this subject line)
 


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Re: ACPI PM Timer

[Bruno Ducrot]

On Tue, Mar 02, 2004 at 09:29:29AM +0800, Ow Mun Heng wrote:
> 
> I know this is bad form(to ask twice).. but... 
> What is this ACPI PM timesource?
> 
> Since I have this "TSC cannot be used as a timesource" when running battery.
> 

Sorry, I forgot your question.  This is the power management timer
as defined by 4.7.1.4 and 4.7.2.1.

The FADT will give you some io registers in order to access the ACPI pm timer,
which is an hardware requirement in order for an hardware platform being ACPI
compliant.  You can then access to a counter.  It also can generate
interrupts.
The purpose for it is to replace the old PIT as the main clock for a system.

-- 
Bruno Ducrot

--  Which is worse:  ignorance or apathy?
--  Don't know.  Don't care.


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