39 lines
970 B
Bash
39 lines
970 B
Bash
#
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# Copyright 2014, NICTA
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#
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# This software may be distributed and modified according to the terms of
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# the BSD 2-Clause license. Note that NO WARRANTY is provided.
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# See "LICENSE_BSD2.txt" for details.
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#
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# @TAG(NICTA_BSD)
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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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