mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
81 lines
1.5 KiB
81 lines
1.5 KiB
#!/bin/bash
|
|
# Copyright 2014 the V8 project authors. All rights reserved.
|
|
# Use of this source code is governed by a BSD-style license that can be
|
|
# found in the LICENSE file.
|
|
|
|
CPUPATH=/sys/devices/system/cpu
|
|
|
|
MAXID=$(cat $CPUPATH/present | awk -F- '{print $NF}')
|
|
|
|
set_governor() {
|
|
echo "Setting CPU frequency governor to \"$1\""
|
|
for (( i=0; i<=$MAXID; i++ )); do
|
|
echo "$1" > $CPUPATH/cpu$i/cpufreq/scaling_governor
|
|
done
|
|
}
|
|
|
|
enable_cores() {
|
|
# $1: How many cores to enable.
|
|
for (( i=1; i<=$MAXID; i++ )); do
|
|
if [ "$i" -lt "$1" ]; then
|
|
echo 1 > $CPUPATH/cpu$i/online
|
|
else
|
|
echo 0 > $CPUPATH/cpu$i/online
|
|
fi
|
|
done
|
|
}
|
|
|
|
dual_core() {
|
|
echo "Switching to dual-core mode"
|
|
enable_cores 2
|
|
}
|
|
|
|
single_core() {
|
|
echo "Switching to single-core mode"
|
|
enable_cores 1
|
|
}
|
|
|
|
|
|
all_cores() {
|
|
echo "Reactivating all CPU cores"
|
|
enable_cores $((MAXID+1))
|
|
}
|
|
|
|
|
|
limit_cores() {
|
|
# $1: How many cores to enable.
|
|
echo "Limiting to $1 cores"
|
|
enable_cores $1
|
|
}
|
|
|
|
case "$1" in
|
|
fast | performance)
|
|
set_governor "performance"
|
|
;;
|
|
slow | powersave)
|
|
set_governor "powersave"
|
|
;;
|
|
default | ondemand)
|
|
set_governor "ondemand"
|
|
;;
|
|
dualcore | dual)
|
|
dual_core
|
|
;;
|
|
singlecore | single)
|
|
single_core
|
|
;;
|
|
allcores | all)
|
|
all_cores
|
|
;;
|
|
limit_cores)
|
|
if [ $# -ne 2 ]; then
|
|
echo "Usage $0 limit_cores <num>"
|
|
exit 1
|
|
fi
|
|
limit_cores $2
|
|
;;
|
|
*)
|
|
echo "Usage: $0 fast|slow|default|singlecore|dualcore|all|limit_cores"
|
|
exit 1
|
|
;;
|
|
esac
|
|
|