| afreitascs |
09-07-2010 01:20 PM |
How to use cpufreq as my 1.8g Hz minimum frequency instead of 1G Hz?
My AMD processor is a 5200 + and has its minimum frequency at 1GHz.
The ferquencias are used by cpufreq: 2700 Mhz, 2600 Mhz, 2400 Mhz, 2200 Mhz, 2000 Mhz, 1800 Mhz and 1000 Mhz .
My question is:
How could I tell for cpufreq use 1800Mhz as my minimum frequency?
Below, piece of my / etc / rc.d / rc.modules on the "CPU scaling governor"
===============
PHP Code:
### CPU frequency scaling support
#
# Below, set CPUFREQ to enable CPU frequency scaling to save system power.
#
# To always try to use CPU frequency scaling, set to: on
# To never use CPU frequency scaling, set to: off
# To use it only when the battery module is loaded (this will cause it to
# be used by default with most laptops), set to: battery
#
CPUFREQ=on
# If CPUFREQ=battery and the battery module is loaded, turn on CPUfreq.
#if [ "$CPUFREQ" = "battery" ]; then
# if /sbin/lsmod | grep -wq battery ; then
# # CPUFREQ=battery and a battery was detected, so change CPUFREQ
# # to 'on' so that the block of script below will try to enable it.
# CPUFREQ=on
# fi
#fi
### Enable CPU frequency scaling if requested:
if [ "$CPUFREQ" = "on" ]; then
### CPU frequency scaling modules for the Linux kernel CPUfreq subsystem.
#
# Clock scaling allows you to change the clock speed of the CPUs on the fly.
# This is a nice method to save battery power, because the lower the clock
# speed is, the less power the CPU consumes.
#
# It should not hurt anything to try to load these modules.
#
# generic ACPI P-States based driver:
# /sbin/modprobe acpi-cpufreq 2>/dev/null
# AMD mobile K6-2/3+ PowerNow!:
# /sbin/modprobe powernow-k6 2>/dev/null
# AMD mobile Athlon PowerNow!:
# /sbin/modprobe powernow-k7 2>/dev/null
# AMD Cool&Quiet PowerNow!:
/sbin/modprobe powernow-k8 2>/dev/null
# Intel SpeedStep using the SMI BIOS interface:
# /sbin/modprobe speedstep-smi 2>/dev/null
# Intel SpeedStep on ICH-based chipsets:
# /sbin/modprobe speedstep-ich 2>/dev/null
# Intel Enhanced SpeedStep :
# /sbin/modprobe speedstep-centrino 2>/dev/null
# Intel Pentium4/Xeon clock modulation is not enabled by default.
# The kernel documentation says "This adds the CPUFreq driver for Intel
# Pentium 4 / XEON processors. When enabled it will lower CPU temperature
# by skipping clocks. This driver should be only used in exceptional
# circumstances when very low power is needed because it causes severe
# slowdowns and noticeable latencies. Normally Speedstep should be used
# instead."
# If you still want to try the Pentium4/Xeon module, uncomment the next line:
#/sbin/modprobe p4-clockmod 2>/dev/null
# NatSemi Geode GX / Cyrix MediaGXm:
# /sbin/modprobe gx-suspmod 2>/dev/null
# Transmeta Crusoe / Efficeon LongRun:
# /sbin/modprobe longrun 2>/dev/null
# VIA Cyrix Longhaul:
# /sbin/modprobe longhaul 2>/dev/null
# nForce2 FSB changing cpufreq driver:
# /sbin/modprobe cpufreq-nforce2 2>/dev/null
# Enhanced PowerSaver driver for VIA C7 CPUs:
# /sbin/modprobe e_powersaver 2>/dev/null
### CPU frequency scaling policies:
#
# Use the CPUFreq governor 'powersave' as default. This sets the
# frequency statically to the lowest frequency supported by the CPU.
#/sbin/modprobe cpufreq_powersave
#
# Use the CPUFreq governor 'performance' as default. This sets the
# frequency statically to the highest frequency supported by the CPU.
#/sbin/modprobe cpufreq_performance
#
# Use the CPUFreq governor 'conservative' as default. This allows you
# to get a full dynamic frequency capable system by simply loading your
# cpufreq low-level hardware driver. Be aware that not all cpufreq
# drivers support the 'conservative' governor -- the fallback governor
# will be the 'performance' governor.
#/sbin/modprobe cpufreq_conservative
#
# Use the CPUFreq governor 'ondemand' as default. This allows you to
# get a full dynamic frequency capable system by simply loading your
# cpufreq low-level hardware driver. Be aware that not all cpufreq
# drivers support the 'ondemand' governor -- the fallback governor will
# be the performance governor. This seems to be the most-recommended
# scaling policy, so rc.modules will try to load this by default.
/sbin/modprobe cpufreq_ondemand 2>/dev/null
### CPU scaling governor:
#
# Set the default scaling_governor to be used (such as userspace or ondemand)
# if there is a CPUFreq scaling policy module loaded that supports it:
SCALING_GOVERNOR=ondemand
#
# Try to enable the scaling_governor selected above:
if [ -r /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors ]; then
if grep -wq "$SCALING_GOVERNOR" /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors ; then
if [ -r /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor ]; then
for SYSCPUFILE in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor ; do
echo "$SCALING_GOVERNOR" > $SYSCPUFILE
done
fi
fi
fi
fi # End enabling CPU scaling support
# We are done with these variables now:
unset NEWMODS RELEASE CPUFREQ SCALING_GOVERNOR SYSCPUFILE
==========================
Thanks |
