RE: [ACPI] acpi_processor_set_power_policy

["Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>]

>-----Original Message-----
>From: linux-kernel-owner@vger.kernel.org 
>[mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of 
>Kenneth Parrish
>Sent: Wednesday, June 08, 2005 5:15 PM
>To: linux-kernel@vger.kernel.org
>Subject: Re: [ACPI] acpi_processor_set_power_policy
>
>-=> Kenneth Parrish wrote to All <=-
>
> KP> SEEN-BY: 8/1 2 2003
> KP> PATH: 8/2003 1 2
> KP> MSGID: 8:8/2003 122ea9cd
> KP> TZUTC: -0600
> KP> CHARSET: PC-8
> KP> From: Kenneth Parrish <Kenneth.Parrish@family-bbs.org>
>
> KP> # readprofile -r ; sleep 1 ; readprofile -m /boot/System.map
> | sort -nr
>
> KP>     527 total                                      0.0003
> KP>     502 acpi_processor_set_power_policy            2.6989
> KP>       7 sort                                       0.0208
> KP>       7 release_task                               0.0208
> KP>       4 zone_watermark_ok                          0.0208
> KP>       3 do_page_fault                              0.0021
> KP>       1 unmap_page_range                           0.0057
> KP>       1 show_free_areas                            0.0013
> KP>       1 do_file_page                               0.0048
> KP>       1 buffered_rmqueue                           0.0020
>
> KP> Should acpi_processor_set_power_policy be called this often?
>
> KP> Kernel: 2.6.12-rc5-git9  # define HZ    500
> KP> <include/asm-i386/param.h> Computer: Cyrix MII and VIA MVP3,
> KP> e-machines '99 dmesg.. Kernel command line:
> KP> BOOT_IMAGE=2.6.12-rc5-git9 ro root=301 clock=tsc elevator=
> KP>  deadline lpj=376832 profile=2
> KP>  kernel profiling enabled (shift: 2)
>
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>I noticed the subject function appears in drivers/acpi/processor_idle.c
>and tried a couple of things. Look OK? comments on the 
>[misguided?] patch?
>:-)


Are you sure that this patch is causing this difference with 
acpi_processor_set_power_policy() calls.

Looking at the code, set_power_policy() is only called at init time 
and _CST change interrupt. So, I am not sure how these changes are 
affecting it.

One guess.. System.map used in your original data may be wrong for 
that kernel, which might have caused it to point at set_power_policy() 
in place of acpi_procesor_idle()....

Thanks,
Venki

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