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cpufreq: switch to usage of shutils functions

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This patch convert some functions to the usage of shutils provided calls.
This approach is more portable and allows to use these calls also on
an Android target.

Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
This commit is contained in:
Patrick Bellasi 2015-11-27 16:38:30 +00:00
parent f2eac51c69
commit cf761317bd
2 changed files with 50 additions and 19 deletions
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34
devlib/bin/scripts/shutils.in
View File

@ -7,12 +7,46 @@ BUSYBOX=${BUSYBOX:-__DEVLIB_BUSYBOX__}
GREP=${GREP:-$BUSYBOX grep}
SED=${SED:-$BUSYBOX sed}
################################################################################
# CPUFrequency Utility Functions
################################################################################
cpufreq_set_all_frequencies() {
FREQ=$1
for CPU in /sys/devices/system/cpu/cpu[0-9]*; do
echo $FREQ > $CPU/cpufreq/scaling_cur_freq
done
}
cpufreq_set_all_governors() {
GOV=$1
for CPU in /sys/devices/system/cpu/cpu[0-9]*; do
echo $GOV > $CPU/cpufreq/scaling_governor
done
}
cpufreq_trace_all_frequencies() {
FREQS=$(cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq)
CPU=0; for F in $FREQS; do
echo "cpu_frequency: state=$F cpu_id=$CPU" > /sys/kernel/debug/tracing/trace_marker
CPU=$((CPU + 1))
done
}
################################################################################
# Main Function Dispatcher
################################################################################
case $CMD in
cpufreq_set_all_frequencies)
cpufreq_set_all_frequencies $*
;;
cpufreq_set_all_governors)
cpufreq_set_all_governors $*
;;
cpufreq_trace_all_frequencies)
cpufreq_trace_all_frequencies $*
;;
*)
echo "Command [$CMD] not supported"
exit -1

35
devlib/module/cpufreq.py
View File

@ -349,30 +349,27 @@ class CpufreqModule(Module):
for cpu in online_cpus:
self.set_frequency(cpu, freq, exact)
def set_all_frequencies(self, freq, exact=False):
self.target.execute(
"for CPU in /sys/devices/system/cpu/cpu[0-9]*; do "\
"echo {} > $CPU/cpufreq/scaling_cur_freq; "\
"done"\
.format(freq), as_root=True)
def set_all_frequencies(self, freq):
"""
Set the specified (minimum) frequency for all the (online) CPUs
"""
return self.target._execute_util(
'cpufreq_set_all_frequencies {}'.format(freq),
as_root=True)
def set_all_governors(self, governor):
self.target.execute(
"for CPU in /sys/devices/system/cpu/cpu[0-9]*; do "\
"echo {} > $CPU/cpufreq/scaling_governor; "\
"done"\
.format(governor), as_root=True)
"""
Set the specified governor for all the (online) CPUs
"""
return self.target._execute_util(
'cpufreq_set_all_governors {}'.format(governor),
as_root=True)
def trace_frequencies(self):
"""
Report current frequencies on trace file
"""
self.target.execute(
'FREQS=$(cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq); '
'CPU=0; for F in $FREQS; do '
' echo "cpu_frequency: state=$F cpu_id=$CPU" > /sys/kernel/debug/tracing/trace_marker; '
' let CPU++; '
'done',
as_root=True
)
return self.target._execute_util('cpufreq_trace_all_frequencies', as_root=True)