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cpufreq: add functions to get frequencies and governors for all online CPUs

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This patch adds a couple of shutils functions to efficiently read all
the frequencies/governors and returne them into a dictionary indexed by
CPU id.

The shutils functions are returning a line per each CPU that can be easily
converted into a dictionary in the host side.

Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
This commit is contained in:
Patrick Bellasi 2015-11-27 16:40:58 +00:00
parent cf761317bd
commit 51b7f01d36
2 changed files with 42 additions and 0 deletions
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16
devlib/bin/scripts/shutils.in
View File

@ -18,6 +18,11 @@ cpufreq_set_all_frequencies() {
done done
} }
cpufreq_get_all_frequencies() {
$GREP '' /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq | \
$SED -e 's|/sys/devices/system/cpu/cpu||' -e 's|/cpufreq/scaling_cur_freq:| |'
}
cpufreq_set_all_governors() { cpufreq_set_all_governors() {
GOV=$1 GOV=$1
for CPU in /sys/devices/system/cpu/cpu[0-9]*; do for CPU in /sys/devices/system/cpu/cpu[0-9]*; do
@ -25,6 +30,11 @@ cpufreq_set_all_governors() {
done done
} }
cpufreq_get_all_governors() {
$GREP '' /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor | \
$SED -e 's|/sys/devices/system/cpu/cpu||' -e 's|/cpufreq/scaling_governor:| |'
}
cpufreq_trace_all_frequencies() { cpufreq_trace_all_frequencies() {
FREQS=$(cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq) FREQS=$(cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq)
CPU=0; for F in $FREQS; do CPU=0; for F in $FREQS; do
@ -41,9 +51,15 @@ case $CMD in
cpufreq_set_all_frequencies) cpufreq_set_all_frequencies)
cpufreq_set_all_frequencies $* cpufreq_set_all_frequencies $*
;; ;;
cpufreq_get_all_frequencies)
cpufreq_get_all_frequencies
;;
cpufreq_set_all_governors) cpufreq_set_all_governors)
cpufreq_set_all_governors $* cpufreq_set_all_governors $*
;; ;;
cpufreq_get_all_governors)
cpufreq_get_all_governors
;;
cpufreq_trace_all_frequencies) cpufreq_trace_all_frequencies)
cpufreq_trace_all_frequencies $* cpufreq_trace_all_frequencies $*
;; ;;

26
devlib/module/cpufreq.py
View File

@ -357,6 +357,19 @@ class CpufreqModule(Module):
'cpufreq_set_all_frequencies {}'.format(freq), 'cpufreq_set_all_frequencies {}'.format(freq),
as_root=True) as_root=True)
def get_all_frequencies(self):
"""
Get the current frequency for all the (online) CPUs
"""
output = self.target._execute_util(
'cpufreq_get_all_frequencies', as_root=True)
frequencies = {}
for x in output.splitlines():
kv = x.split(' ')
if kv[0] == '':
break
frequencies[kv[0]] = kv[1]
return frequencies
def set_all_governors(self, governor): def set_all_governors(self, governor):
""" """
@ -366,6 +379,19 @@ class CpufreqModule(Module):
'cpufreq_set_all_governors {}'.format(governor), 'cpufreq_set_all_governors {}'.format(governor),
as_root=True) as_root=True)
def get_all_governors(self):
"""
Get the current governor for all the (online) CPUs
"""
output = self.target._execute_util(
'cpufreq_get_all_governors', as_root=True)
governors = {}
for x in output.splitlines():
kv = x.split(' ')
if kv[0] == '':
break
governors[kv[0]] = kv[1]
return governors
def trace_frequencies(self): def trace_frequencies(self):
""" """