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Your IP : 3.144.82.26
| Current Path : /usr/share/dstat/ |
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| Current File : //usr/share/dstat/dstat_power.py |
### Author: Dag Wieers <dag@wieers.com>
class dstat_plugin(dstat):
"""
Power usage information from ACPI.
Displays the power usage in mwh of your system's battery using ACPI
information. This information is only available when the battery is
being used (or being charged).
"""
def __init__(self):
self.name = 'power'
self.type = 'f'
self.width = 5
self.scale = 1
self.vars = ( 'rate', )
self.nick = ( 'usage', )
self.rate = 0
self.batteries = []
for battery in os.listdir('/proc/acpi/battery/'):
for line in dopen('/proc/acpi/battery/'+battery+'/state').readlines():
l = line.split()
if len(l) < 2: continue
self.batteries.append(battery)
break
def check(self):
if not self.batteries:
raise Exception, 'No battery information found, no power usage statistics'
def extract(self):
amperes_drawn = 0
voltage = 0
watts_drawn = 0
for battery in self.batteries:
for line in dopen('/proc/acpi/battery/'+battery+'/state').readlines():
l = line.split()
if len(l) < 3: continue
if l[0] == 'present:' and l[1] != 'yes': continue
if l[0:2] == ['charging','state:'] and l[2] != 'discharging':
voltage = 0
break
if l[0:2] == ['present','voltage:']:
voltage = int(l[2]) / 1000.0
elif l[0:2] == ['present','rate:'] and l[3] == 'mW':
watts_drawn = int(l[2]) / 1000.0
elif l[0:2] == ['present','rate:'] and l[3] == 'mA':
amperes_drawn = int(l[2]) / 1000.0
self.rate = self.rate + watts_drawn + voltage * amperes_drawn
### Return error if we found no information
if self.rate == 0:
self.rate = -1
if op.update:
self.val['rate'] = self.rate / elapsed
else:
self.val['rate'] = self.rate
if step == op.delay:
self.rate = 0
# vim:ts=4:sw=4:et