Source code for i3pystatus.cpu_usage
from collections import defaultdict
from string import Formatter
from i3pystatus import IntervalModule
try:
from natsort import natsorted as sorted
except ImportError:
pass
[docs]class CpuUsage(IntervalModule):
"""
Shows CPU usage.
The first output will be inacurate.
Linux only
.. rubric:: Available formatters
* `{usage}` — usage average of all cores
* `{usage_cpu*}` — usage of one specific core. replace "*" by core number starting at 0
* `{usage_all}` — usage of all cores separate. usess natsort when available(relevant for more than 10 cores)
"""
format = "{usage:02}%"
format_all = "{core}:{usage:02}%"
exclude_average = False
interval = 1
color = None
settings = (
("format", "format string."),
("format_all", ("format string used for {usage_all} per core. "
"Available formaters are {core} and {usage}. ")),
("exclude_average", ("If True usage average of all cores will "
"not be in format_all.")),
("color", "HTML color code #RRGGBB")
)
def init(self):
self.prev_total = defaultdict(int)
self.prev_busy = defaultdict(int)
self.formatter = Formatter()
[docs] def get_cpu_timings(self):
"""
reads and parses /proc/stat
returns dictionary with all available cores including global average
"""
timings = {}
with open('/proc/stat', 'r') as file_obj:
for line in file_obj:
if 'cpu' in line:
line = line.strip().split()
timings[line[0]] = [int(x) for x in line[1:]]
return timings
[docs] def calculate_usage(self, cpu, total, busy):
"""
calculates usage
"""
diff_total = total - self.prev_total[cpu]
diff_busy = busy - self.prev_busy[cpu]
self.prev_total[cpu] = total
self.prev_busy[cpu] = busy
if diff_total == 0:
return 0
else:
return int(diff_busy / diff_total * 100)
[docs] def get_usage(self):
"""
parses /proc/stat and calcualtes total and busy time
(more specific USER_HZ see man 5 proc for further informations )
"""
usage = {}
for cpu, timings in self.get_cpu_timings().items():
cpu_total = sum(timings)
del timings[3:5]
cpu_busy = sum(timings)
cpu_usage = self.calculate_usage(cpu, cpu_total, cpu_busy)
usage['usage_' + cpu] = cpu_usage
# for backward compatibility
usage['usage'] = usage['usage_cpu']
return usage
def run(self):
usage = self.get_usage()
usage['usage_all'] = self.gen_format_all(usage)
self.data = usage
self.output = {
"full_text": self.format.format_map(usage),
"color": self.color
}