in ambari-metrics-host-monitoring/src/main/python/psutil/psutil/__init__.py [0:0]
def cpu_times_percent(interval=None, percpu=False):
"""Same as cpu_percent() but provides utilization percentages
for each specific CPU time as is returned by cpu_times().
For instance, on Linux we'll get:
>>> cpu_times_percent()
cpupercent(user=4.8, nice=0.0, system=4.8, idle=90.5, iowait=0.0,
irq=0.0, softirq=0.0, steal=0.0, guest=0.0, guest_nice=0.0)
>>>
interval and percpu arguments have the same meaning as in
cpu_percent().
"""
global _last_cpu_times_2
global _last_per_cpu_times_2
blocking = interval is not None and interval > 0.0
def calculate(t1, t2):
nums = []
all_delta = sum(t2) - sum(t1)
for field in t1._fields:
field_delta = getattr(t2, field) - getattr(t1, field)
try:
field_perc = (100 * field_delta) / all_delta
except ZeroDivisionError:
field_perc = 0.0
field_perc = round(field_perc, 1)
if _WINDOWS:
# XXX
# Work around:
# https://code.google.com/p/psutil/issues/detail?id=392
# CPU times are always supposed to increase over time
# or at least remain the same and that's because time
# cannot go backwards.
# Surprisingly sometimes this might not be the case on
# Windows where 'system' CPU time can be smaller
# compared to the previous call, resulting in corrupted
# percentages (< 0 or > 100).
# I really don't know what to do about that except
# forcing the value to 0 or 100.
if field_perc > 100.0:
field_perc = 100.0
elif field_perc < 0.0:
field_perc = 0.0
nums.append(field_perc)
return _psplatform.scputimes(*nums)
# system-wide usage
if not percpu:
if blocking:
t1 = cpu_times()
time.sleep(interval)
else:
t1 = _last_cpu_times_2
_last_cpu_times_2 = cpu_times()
return calculate(t1, _last_cpu_times_2)
# per-cpu usage
else:
ret = []
if blocking:
tot1 = cpu_times(percpu=True)
time.sleep(interval)
else:
tot1 = _last_per_cpu_times_2
_last_per_cpu_times_2 = cpu_times(percpu=True)
for t1, t2 in zip(tot1, _last_per_cpu_times_2):
ret.append(calculate(t1, t2))
return ret