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#!/usr/bin/env python
import os
import time
try:
import psutil
except ImportError:
print("psutil module not found!")
exit(1)
try:
import argparse
except ImportError:
print("argparse module not found!")
exit(1)
class Elapsed(object):
SECOND = 1
MINUTE = SECOND * 60
HOUR = MINUTE * 24
DAY = HOUR * 24
WEEK = DAY * 7
LOAD_THRESHOLD=1
try:
LOAD_THRESHOLD=psutil.cpu_count() / 2
except:
LOAD_THRESHOLD=psutil.cpu_count()
CPU_THRESHOLD=50.0
CPUTIME_THRESHOLD=Elapsed.SECOND * 1
POLL=3
TEST_MODE=False
VERBOSE=False
QUITE=False
def renice(proc, nice_value=0):
nice_current = 255
try:
pid = proc.pid
nice_previous = proc.get_nice()
if nice_previous < 0:
return
if nice_value <= nice_previous:
return
if not TEST_MODE:
proc.set_nice(nice_value)
if not TEST_MODE:
nice_current = proc.get_nice()
else:
nice_current = nice_value
print("PID: {0}: nice({1}) -> nice({2})".format(pid, nice_previous, nice_current))
except psutil.AccessDenied as e:
print("PID: {0}: {1}: Permission denied setting nice to {2}".format(pid, proc.username(), nice_value))
except psutil.NoSuchProcess as e:
return
return nice_current
def time_to_nice(start_time):
nice = 0
diff = time.time() - start_time
if diff >= Elapsed.WEEK:
nice = 19
elif diff >= Elapsed.DAY:
nice = 15
elif diff >= Elapsed.DAY / 2:
nice = 11
elif diff >= Elapsed.HOUR:
nice = 9
elif diff >= Elapsed.HOUR / 2:
nice = 4
elif diff >= Elapsed.MINUTE:
nice = 2
elif diff >= Elapsed.MINUTE / 2:
nice = 1
return nice
def cputime_to_nice(cpu_time):
nice = 0
time_user, time_system = cpu_time
diff = time_user + time_system
if diff >= Elapsed.WEEK:
nice = 19
elif diff >= Elapsed.DAY:
nice = 15
elif diff >= Elapsed.DAY / 2:
nice = 11
elif diff >= Elapsed.HOUR:
nice = 9
elif diff >= Elapsed.HOUR / 2:
nice = 4
elif diff >= Elapsed.MINUTE:
nice = 2
elif diff >= Elapsed.MINUTE / 2:
nice = 1
return nice
def get_bad_processes(cpu_threshold=CPU_THRESHOLD, cputime_threshold=CPUTIME_THRESHOLD, *args, **kwargs):
user = ""
if kwargs.has_key('user'):
user = kwargs['user']
for proc in psutil.process_iter():
try:
pid = proc.pid
username = proc.username()
status = proc.status()
started = proc.create_time()
user_time, system_time = proc.cpu_times()
cputime_total = user_time + system_time
uid, euid, _ = proc.uids()
if uid == 0 or euid == 0:
continue
cpu = proc.get_cpu_percent(interval=0.05)
if cpu > cpu_threshold:
if VERBOSE:
print("PID: {0}: cpu_threshold exeeded ({1}% > {2}%)".format(pid, cpu, cpu_threshold))
if cputime_total > cputime_threshold:
if VERBOSE:
print("PID: {0}: cputime_threshold exceeded ({1} > {2})".format(pid, cputime_total, cputime_threshold))
if user:
if user != username:
continue
yield proc
except psutil.NoSuchProcess as e:
if VERBOSE:
print("PID: {0}: disappeared".format(e.pid))
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument('--user', '-u', default="", type=str, help='Limit to specific user')
parser.add_argument('--cpu-threshold', '-c', default=CPU_THRESHOLD, type=float, help='Trigger after n%%')
parser.add_argument('--cputime-threshold', '-t', default=CPUTIME_THRESHOLD, type=float, help='Trigger after n%%')
parser.add_argument('--load-threshold', '-l', default=LOAD_THRESHOLD, type=float, help='Trigger after n load average')
parser.add_argument('--poll', '-p', default=POLL, type=float, help='Wait n seconds between polling processes')
parser.add_argument('--test', '-T', action='store_true', default=False, help='Do not modify processes; report only.')
parser.add_argument('--verbose', '-v', action='store_true', default=False, help='Verbose output')
parser.add_argument('--quiet', '-q', action='store_true', default=False, help='Suppress output')
args = parser.parse_args()
POLL = args.poll
VERBOSE = args.verbose
QUIET = args.quiet
TEST_MODE = args.test
CPU_THRESHOLD = args.cpu_threshold
CPUTIME_THRESHOLD = args.cputime_threshold
LOAD_THRESHOLD = args.load_threshold
user = args.user
load_sleep = False
load_warn = False
while(True):
load = os.getloadavg()
load = sum(load) / len(load)
if load < LOAD_THRESHOLD:
load_sleep = True
load_warn = False
if load_sleep:
if VERBOSE:
print("SYS: load_threshold nominal, sleeping ({0} < {1})".format(load, LOAD_THRESHOLD))
load_sleep = False
time.sleep(POLL)
continue
else:
load_warn = True
if load_warn:
if VERBOSE:
print("SYS: load_threshold exceeded ({0} > {1})".format(load, LOAD_THRESHOLD))
for bad in get_bad_processes(CPU_THRESHOLD, CPUTIME_THRESHOLD, user=user):
try:
nice = cputime_to_nice(bad.cpu_times())
if not nice:
nice = time_to_nice(bad.create_time())
if nice != 0:
renice(bad, nice)
except psutil.NoSuchProcess:
continue
time.sleep(POLL)
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