Does Intel CoreDuo require any special configuration?

Shagbag · 2006-12-07 06:16:15

I have a new laptop with an Intel CoreDuo CPU.
As this is a multi-core CPU, do I need to do any special configuration to enable the optimal usage of the cores, or does the 2.6.18-ARCH kernel already handle this for me?

codemac · 2006-12-07 06:22:24

SMP kernels handle multiple processors.

Thus you are covered, as the arch kernels are SMP.

tardo · 2006-12-07 07:00:54

you could change MAKEOPTS to -j3 in makepkg.conf

Snarkout · 2006-12-07 18:39:01

I was under the impression that speedstepping didn't work for both cores OOTB. Is this not the case any longer?

fk · 2006-12-07 18:47:21

I have a CoreDuo and speedstep works for both cores

Shagbag · 2006-12-07 21:36:54

fk wrote:

I have a CoreDuo and speedstep works for both cores

Do I need to configure anything to get speedstep working?

broch · 2006-12-07 21:46:44

either install different daemons or do is simpler:

add to MODULES section of /etc/rc.conf
MODULES=(speedstep_centrino)

assuming that you want ondemand
add to /etc/rc.local
echo "ondemand" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo "ondemand" > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor

restart computer
to confirm core frequency status run
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
#cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies

you can run this on both cores of course
cat /proc/cpuinfo will show current frequency on both cores.

phrakture · 2006-12-07 21:48:16

broch wrote:

either install different daemons or do is simpler:

Or you can use the 'cpufreq' rc.d script, which comes with cpufrequtils. That is like 10 times simpler than this method.

fk · 2006-12-07 22:07:07

I use the Kernel own governors, and I have modified the handler.sh from ACPI

#!/bin/sh
# Default acpi script that takes an entry for all actions
# NOTE: This is a 2.6-centric script. If you use 2.4.x, you'll have to
# modify it to not use /sys
minspeed=`cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq`
maxspeed=`cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq`
setspeed="/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed"
set $*
case "$1" in
button/power) /usr/sbin/hibernate &
#echo "PowerButton pressed!">/dev/tty5
case "$2" in
PWRF) logger "PowerButton pressed: $2" ;;
*) logger "ACPI action undefined: $2" ;;
esac
;;
button/sleep)
case "$2" in
SLPB) echo -n mem >/sys/power/state ;;
*) logger "ACPI action undefined: $2" ;;
esac
;;
ac_adapter)
case "$2" in
AC)
case "$4" in
00000000)
#echo -n $minspeed >$setspeed
#/etc/laptop-mode/laptop-mode start
echo -n powersave > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo -n powersave > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
;;
00000001)
#echo -n $maxspeed >$setspeed
#/etc/laptop-mode/laptop-mode stop
echo -n ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo -n ondemand > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
;;
esac
;;
*) logger "ACPI action undefined: $2" ;;
esac
;;
battery)
case "$2" in
BAT0)
case "$4" in
00000000) #echo "offline" >/dev/tty5
;; 00000001) #echo "online" >/dev/tty5
;;
esac
;;
CPU0)
;;
*) logger "ACPI action undefined: $2" ;;
esac
;;
button/lid) echo -n mem >/sys/power/state &
#echo "LID switched!">/dev/tty5
;;
*)
logger "ACPI group/action undefined: $1 / $2"
;;
esac

This works well

broch · 2006-12-08 01:03:44

Or you can use the 'cpufreq' rc.d script, which comes with cpufrequtils. That is like 10 times simpler than this method.

you must be joking: these are three lines only in two files.

pelle.k · 2006-12-08 03:11:26

pacman -S powersave
then add powersaved to deamons array.

If you wanna tweak it. edit /etc/powersave/cpufreq

Shagbag · 2006-12-08 15:20:56

Oh man! I hates being a n00b. There's so much to learn and it's SO detailed. The more I learn the more I find out there's more I don't know. Will I ever be competent at this linux thing? I've been at it for 6 months already. But thanks for the info/tips. I'm going to try them out this weekend. I'm basically running a BASE install with KDE and the nVidia driver.

Please feel free to add to this post as I'm always looking for more ideas and explanations.

Snarkout · 2006-12-08 16:35:19

Will I ever be competent at this linux thing?

I suppose you'll need to define competent. I'm currently a sysadmin, have been using linux for years, and still constantly discover that I don't know sh!t about the guts of the OSes I run.

Sekre · 2006-12-08 16:46:58

Snarkout wrote:

Will I ever be competent at this linux thing?
I suppose you'll need to define competent. I'm currently a sysadmin, have been using linux for years, and still constantly discover that I don't know sh!t about the guts of the OSes I run.

aint that the best thing?
there seems to always be more to learn

only backside is that you need a lot of time to learn all stuff. But the tradeoff is good in my opinion 8)

Arch Linux

#1 2006-12-07 06:16:15

Does Intel CoreDuo require any special configuration?

#2 2006-12-07 06:22:24

Re: Does Intel CoreDuo require any special configuration?

#3 2006-12-07 07:00:54

Re: Does Intel CoreDuo require any special configuration?

#4 2006-12-07 18:39:01

Re: Does Intel CoreDuo require any special configuration?

#5 2006-12-07 18:47:21

Re: Does Intel CoreDuo require any special configuration?

#6 2006-12-07 21:36:54

Re: Does Intel CoreDuo require any special configuration?

#7 2006-12-07 21:46:44

Re: Does Intel CoreDuo require any special configuration?

#8 2006-12-07 21:48:16

Re: Does Intel CoreDuo require any special configuration?

#9 2006-12-07 22:07:07

Re: Does Intel CoreDuo require any special configuration?

#10 2006-12-08 01:03:44

Re: Does Intel CoreDuo require any special configuration?

#11 2006-12-08 03:11:26

Re: Does Intel CoreDuo require any special configuration?

#12 2006-12-08 15:20:56

Re: Does Intel CoreDuo require any special configuration?

#13 2006-12-08 16:35:19

Re: Does Intel CoreDuo require any special configuration?

#14 2006-12-08 16:46:58

Re: Does Intel CoreDuo require any special configuration?

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