35 lines
843 B
Bash
35 lines
843 B
Bash
#
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# Copyright 2020, Data61, CSIRO (ABN 41 687 119 230)
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#
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# SPDX-License-Identifier: BSD-2-Clause
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#
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FREQ_AVAIL=/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
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FREQ_CONTROL=/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
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FREQ_GOV=/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
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FREQ_CUR=/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
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FREQ_LIST=`cat ${FREQ_AVAIL}`
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OLD_GOV=`cat ${FREQ_GOV}`
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OLD_SPEED=`cat ${FREQ_CUR}`
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echo userspace > ${FREQ_GOV}
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echo -n "cpufreq governor is now "
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cat ${FREQ_GOV}
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for f in ${FREQ_LIST}
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do
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echo $f > ${FREQ_CONTROL}
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echo -n "CPU frequency is now "
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cat ${FREQ_CUR}
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sleep 1
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done
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echo ${OLD_SPEED} > ${FREQ_CONTROL}
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echo ${OLD_GOV} > ${FREQ_GOV}
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echo -n "Restored CPU frequency to "
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cat ${FREQ_CUR}
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echo -n "Restored cpufreq governor to "
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cat ${FREQ_GOV}
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