[ltp] Re: Re: Re: Re: Stress testing for undervolting

[TNKS]

Hi Laurent, everyone,

As per discussions on this thread, I posted on ThinkWiki a script I put
together to test my system.  I wanted to let you all know, so that the
script might get more review if anyone in this forum is interested.  The
script served its purpose for me (I've got voltages I think I can trust),
so I don't have a compelling reason to revisit it.  However, I'm interested
in feedback on it none-the-less.  

Also, when I got around to documenting it, I ended up with more discussion
than I'd anticipated.  I hope I didn't get any information wrong.  So aside
from the script itself, it might also be nice for the comments and
discussion to be reviewed as well.

Here's the link:

    http://www.thinkwiki.org/wiki/Undervolt_Stress_Testing_Script

Regards,
Sukant


Laurent Gilson wrote:

> On Mon, 17 Jul 2006 10:10:57 +0200, Florian Manschwetus
> <florianmanschwetus@gmx.de> wrote:
> 
>> Is some where a good howto for undervolting, because id like to test my
>> T60 with undervolting.
> 
> Is it a pentiumM ? => Read:
> http://www.thinkwiki.org/wiki/Pentium_M_undervolting_and_underclocking
> http://gentoo-wiki.com/HOWTO_Undervolt_a_Pentium_M_CPU (currently down,
> just use the google cache:
>
http://64.233.183.104/search?q=cache:FCkDrGKKIjYJ:gentoo-wiki.com/HOWTO_Undervolt_a_Pentium_M_CPU+&hl=en&ct=clnk&cd=1&client=opera
> )
> 
> Alternative 2 from thinkwiki is the same thing as described in the
> gentoo-wiki. I don´t like Alternative 1 at all.
> 
> You will need a recent kernel-source (> 2.6.10) and apply the
> bdz.undervolt.XXXX.XX.XX.X.patch file. "patch -p 0 <
> bdz.undervolt.XXXX.XX.XX.X.patch" will apply the patch to the kernel (if
> launched in the right directory. For starters try /usr/src/linux).
> 
> After that you need to patch (ibm_acpi, tp_smapi...), configure (copy
> /proc/config.gz to /usr/src/linux/.config) and build the kernel (make;
> make modules; make image ... depends on your distri). Install/configure it
> in grub and reboot.
> 
> Look for /sys/devices/system/cpu/cpu0/cpufreq/op_points_table or
> /sys/devices/system/cpu/cpu0/cpufreq/voltage_table (depending on the
> patch-version).
> 
> cu