1751 lines
53 KiB
Python
Executable File
1751 lines
53 KiB
Python
Executable File
#!/usr/bin/env python3
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"""A daemon that prevents OOM in Linux systems."""
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from time import sleep, time
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start_time = time()
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import os
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from operator import itemgetter
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# this is most slow import
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from argparse import ArgumentParser
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from sys import stdout, stderr
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from signal import SIGKILL, SIGTERM
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sig_dict = {SIGKILL: 'SIGKILL',
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SIGTERM: 'SIGTERM'}
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'''
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nm = 30
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nc = nm + 1
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'''
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self_uid = os.geteuid()
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self_pid = str(os.getpid())
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wait_time = 2
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cache_time = 30
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cache_path = '/dev/shm/nohang_env_cache'
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psi_path = '/proc/pressure/memory'
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psi_support = os.path.exists(psi_path)
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##########################################################################
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# function definition section
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def psi_mem_some_avg_total():
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if psi_support:
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return float(rline1(psi_path).rpartition('=')[2])
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def check_mem():
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"""find mem_available"""
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return int(rline1('/proc/meminfo').split(':')[1].strip(' kB\n'))
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def check_mem_and_swap():
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"""find mem_available, swap_total, swap_free"""
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with open('/proc/meminfo') as f:
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for n, line in enumerate(f):
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if n is 2:
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mem_available = int(line.split(':')[1].strip(' kB\n'))
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continue
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if n is swap_total_index:
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swap_total = int(line.split(':')[1].strip(' kB\n'))
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continue
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if n is swap_free_index:
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swap_free = int(line.split(':')[1].strip(' kB\n'))
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break
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return mem_available, swap_total, swap_free
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def check_zram():
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"""find MemUsedZram"""
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disksize_sum = 0
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mem_used_total_sum = 0
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for dev in os.listdir('/sys/block'):
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if dev.startswith('zram'):
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stat = zram_stat(dev)
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disksize_sum += int(stat[0])
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mem_used_total_sum += int(stat[1])
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ZRAM_DISKSIZE_FACTOR = 0.0042
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# Означает, что при задани zram disksize = 1 GiB доступная память
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# уменьшится на 0.0042 GiB.
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# Найден экспериментально, требует уточнения с разными ядрами и архитектурами.
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# На небольших дисксайзах (до гигабайта) может быть больше, до 0.0045.
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# Создатель модуля zram утверждает, что ZRAM_DISKSIZE_FACTOR доожен быть 0.001:
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# ("zram uses about 0.1% of the size of the disk"
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# - https://www.kernel.org/doc/Documentation/blockdev/zram.txt),
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# но это утверждение противоречит опытным данным.
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# ZRAM_DISKSIZE_FACTOR = deltaMemAvailavle / disksize
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# found experimentally
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return (mem_used_total_sum + disksize_sum * ZRAM_DISKSIZE_FACTOR) / 1024.0
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def format_time(t):
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t = int(t)
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if t < 60:
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return '{} sec'.format(t)
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elif t >= 60 and t < 3600:
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m = t // 60
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s = t % 60
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return '{} min {} sec'.format(m, s)
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else:
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h = t // 3600
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s0 = t - h * 3600
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m = s0 // 60
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s = s0 % 60
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return '{} h {} min {} sec'.format(h, m, s)
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def re_pid_environ(pid):
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"""
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read environ of 1 process
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returns tuple with USER, DBUS, DISPLAY like follow:
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('user', 'DISPLAY=:0',
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'DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus')
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returns None if these vars is not in /proc/[pid]/environ
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"""
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display_env = 'DISPLAY='
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dbus_env = 'DBUS_SESSION_BUS_ADDRESS='
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user_env = 'USER='
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try:
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env = str(rline1('/proc/' + pid + '/environ'))
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if display_env in env and dbus_env in env and user_env in env:
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env_list = env.split('\x00')
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# iterating over a list of process environment variables
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for i in env_list:
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if i.startswith(user_env):
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user = i
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continue
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if i.startswith(display_env):
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display = i[:10]
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continue
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if i.startswith(dbus_env):
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if ',guid=' in i:
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return None
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dbus = i
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continue
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if i.startswith('HOME='):
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# exclude Display Manager's user
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if i.startswith('HOME=/var'):
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return None
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env = user.partition('USER=')[2], display, dbus
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return env
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except FileNotFoundError:
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pass
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except ProcessLookupError:
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pass
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def root_notify_env():
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"""return set(user, display, dbus)"""
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unsorted_envs_list = []
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# iterates over processes, find processes with suitable env
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for pid in os.listdir('/proc'):
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if pid[0].isdecimal() is False:
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continue
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one_env = re_pid_environ(pid)
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unsorted_envs_list.append(one_env)
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env = set(unsorted_envs_list)
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env.discard(None)
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return env
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def string_to_float_convert_test(string):
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"""Try to interprete string values as floats."""
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try:
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return float(string)
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except ValueError:
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return None
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def string_to_int_convert_test(string):
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"""Try to interpret string values as integers."""
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try:
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return int(string)
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except ValueError:
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return None
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# extracting the parameter from the config dictionary, str return
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def conf_parse_string(param):
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"""
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Get string parameters from the config dict.
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param: config_dict key
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returns config_dict[param].strip()
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"""
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if param in config_dict:
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return config_dict[param].strip()
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else:
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print('All the necessary parameters must be in the config')
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print('There is no "{}" parameter in the config'.format(param))
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exit()
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# extracting the parameter from the config dictionary, bool return
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def conf_parse_bool(param):
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"""
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Get bool parameters from the config_dict.
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param: config_dicst key
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returns bool
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"""
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if param in config_dict:
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param_str = config_dict[param]
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if param_str == 'True':
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return True
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elif param_str == 'False':
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return False
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else:
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print('Invalid value of the "{}" parameter.'.format(param_str))
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print('Valid values are True and False.')
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print('Exit')
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exit()
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else:
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print('All the necessary parameters must be in the config')
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print('There is no "{}" parameter in the config'.format(param_str))
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exit()
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def rline1(path):
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"""read 1st line from path."""
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with open(path) as f:
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for line in f:
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return line[:-1]
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def write(path, string):
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"""Write string to path."""
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with open(path, 'w') as f:
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f.write(string)
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def kib_to_mib(num):
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"""Convert KiB values to MiB values."""
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return round(num / 1024.0)
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def percent(num):
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"""Interprete mum as percentage."""
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return round(num * 100, 1)
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def just_percent_mem(num):
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"""convert num to percent and justify"""
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return str(round(num * 100, 1)).rjust(4, ' ')
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def just_percent_swap(num):
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return str(round(num * 100, 1)).rjust(5, ' ')
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def human(num, lenth):
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"""Convert KiB values to MiB values with right alignment"""
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return str(round(num / 1024)).rjust(lenth, ' ')
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# return str with amount of bytes
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def zram_stat(zram_id):
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"""
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Get zram state.
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zram_id: str zram block-device id
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returns bytes diskcize, str mem_used_total
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"""
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try:
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disksize = rline1('/sys/block/' + zram_id + '/disksize')
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except FileNotFoundError:
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return '0', '0'
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if disksize == ['0\n']:
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return '0', '0'
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try:
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mm_stat = rline1('/sys/block/' + zram_id + '/mm_stat').split(' ')
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mm_stat_list = []
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for i in mm_stat:
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if i != '':
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mm_stat_list.append(i)
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mem_used_total = mm_stat_list[2]
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except FileNotFoundError:
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mem_used_total = rline1('/sys/block/' + zram_id + '/mem_used_total')
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return disksize, mem_used_total # BYTES, str
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# return process name
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def pid_to_name(pid):
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"""
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Get process name by pid.
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pid: str pid of required process
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returns string process_name
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"""
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try:
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with open('/proc/' + pid + '/status') as f:
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for line in f:
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return line[:-1].split('\t')[1]
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except FileNotFoundError:
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return ''
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except ProcessLookupError:
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return ''
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def pid_to_cmdline(pid):
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"""
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Get process cmdline by pid.
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pid: str pid of required process
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returns string cmdline
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"""
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with open('/proc/' + pid + '/cmdline') as file:
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try:
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return file.readlines()[0].replace('\x00', ' ').strip()
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except IndexError:
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return ''
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def pid_to_uid(pid):
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with open('/proc/' + pid + '/status') as f:
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for n, line in enumerate(f):
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if n is uid_index:
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return line.split('\t')[1]
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def send_notify_warn():
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"""
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Look for process with maximum 'badness' and warn user with notification.
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"""
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# find process with max badness
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fat_tuple = fattest()
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pid = fat_tuple[0]
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name = pid_to_name(pid)
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if mem_used_zram > 0:
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low_mem_percent = '{}% {}% {}%'.format(
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round(mem_available / mem_total * 100),
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round(swap_free / (swap_total + 0.1) * 100),
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round(mem_used_zram / mem_total * 100))
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elif swap_free > 0:
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low_mem_percent = '{}% {}%'.format(
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round(mem_available / mem_total * 100),
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round(swap_free / (swap_total + 0.1) * 100))
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else:
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low_mem_percent = '{}%'.format(
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round(mem_available / mem_total * 100))
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title = 'Low memory: {}'.format(low_mem_percent)
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body = 'Fattest process: <b>{}</b>, <b>{}</b>'.format(pid, name)
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if root: # If nohang was started by root
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# send notification to all active users with special script
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# теперь можно напрямую уведомлять из кэша если он не устарел
|
||
|
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|
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Popen([
|
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'/usr/bin/nohang_notify_low_mem',
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'--mem', low_mem_percent,
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'--pid', pid,
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'--name', name
|
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])
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else: # Or by regular user
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# send notification to user that runs this nohang
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try:
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Popen(['notify-send', '--icon=dialog-warning',
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'{}'.format(title), '{}'.format(body)]).wait(wait_time)
|
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except TimeoutExpired:
|
||
print('TimeoutExpired: ' + 'notify low mem')
|
||
|
||
|
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def send_notify(signal, name, pid):
|
||
"""
|
||
Notificate about OOM Preventing.
|
||
|
||
signal: key for notify_sig_dict
|
||
name: str process name
|
||
pid: str process pid
|
||
"""
|
||
title = 'Preventing OOM'
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||
body = '<b>{}</b> process <b>{}</b>, <b>{}</b>'.format(
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notify_sig_dict[signal], pid, name.replace(
|
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# сивол & может ломать уведомления в некоторых темах оформления,
|
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# поэтому заменяется на *
|
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'&', '*'))
|
||
if root:
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# send notification to all active users with notify-send
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||
b = root_notify_env()
|
||
if len(b) > 0:
|
||
for i in b:
|
||
username, display_env, dbus_env = i[0], i[1], i[2]
|
||
try:
|
||
Popen(['sudo', '-u', username, 'env', display_env,
|
||
dbus_env, 'notify-send', '--icon=dialog-warning',
|
||
'{}'.format(title), '{}'.format(body)]).wait(wait_time)
|
||
except TimeoutExpired:
|
||
print('TimeoutExpired: ' + 'notify send signal')
|
||
else:
|
||
# send notification to user that runs this nohang
|
||
try:
|
||
Popen(['notify-send', '--icon=dialog-warning',
|
||
'{}'.format(title), '{}'.format(body)]).wait(wait_time)
|
||
except TimeoutExpired:
|
||
print('TimeoutExpired: ' + 'notify send signal')
|
||
|
||
def send_notify_etc(pid, name, command):
|
||
"""
|
||
Notificate about OOM Preventing.
|
||
|
||
command: str command that will be executed
|
||
name: str process name
|
||
pid: str process pid
|
||
"""
|
||
title = 'Preventing OOM'
|
||
body = 'Victim is process <b>{}</b>, <b>{}</b>\nExecute the command:\n<b>{}</b>'.format(
|
||
pid, name.replace('&', '*'), command.replace('&', '*'))
|
||
if root:
|
||
# send notification to all active users with notify-send
|
||
b = root_notify_env()
|
||
if len(b) > 0:
|
||
for i in b:
|
||
username, display_env, dbus_env = i[0], i[1], i[2]
|
||
try:
|
||
Popen(['sudo', '-u', username, 'env', display_env,
|
||
dbus_env, 'notify-send', '--icon=dialog-warning',
|
||
'{}'.format(title), '{}'.format(body)]).wait(wait_time)
|
||
except TimeoutExpired:
|
||
print('TimeoutExpired: notify run command')
|
||
else:
|
||
# send notification to user that runs this nohang
|
||
Popen(['notify-send', '--icon=dialog-warning', '{}'.format(title), '{}'
|
||
.format(body)])
|
||
|
||
|
||
def sleep_after_send_signal(signal):
|
||
"""
|
||
Sleeping after signal was sent.
|
||
|
||
signal: sent signal
|
||
"""
|
||
if signal is SIGKILL:
|
||
if print_sleep_periods:
|
||
print(' sleep', min_delay_after_sigkill)
|
||
sleep(min_delay_after_sigterm)
|
||
else:
|
||
if print_sleep_periods:
|
||
print(' sleep', min_delay_after_sigterm)
|
||
sleep(min_delay_after_sigterm)
|
||
|
||
|
||
def fattest():
|
||
"""
|
||
Find the process with highest badness and its badness adjustment
|
||
Return pid and badness
|
||
"""
|
||
|
||
pid_badness_list = []
|
||
|
||
for pid in os.listdir('/proc'):
|
||
# only directories whose names consist only of numbers, except /proc/1/
|
||
if pid[0].isdecimal() is False or pid is '1' or pid is self_pid:
|
||
continue
|
||
|
||
# find and modify badness (if it needs)
|
||
try:
|
||
badness = int(rline1('/proc/' + pid + '/oom_score'))
|
||
|
||
if decrease_oom_score_adj:
|
||
oom_score_adj = int(rline1('/proc/' + pid + '/oom_score_adj'))
|
||
if badness > oom_score_adj_max and oom_score_adj > 0:
|
||
badness = badness - oom_score_adj + oom_score_adj_max
|
||
|
||
if regex_matching:
|
||
name = pid_to_name(pid)
|
||
for re_tup in processname_re_list:
|
||
if search(re_tup[1], name) is not None:
|
||
if pid_to_cmdline(pid) == '':
|
||
# skip kthreads
|
||
continue
|
||
badness += int(re_tup[0])
|
||
|
||
if re_match_cmdline:
|
||
cmdline = pid_to_cmdline(pid)
|
||
if cmdline == '':
|
||
# skip kthreads
|
||
continue
|
||
for re_tup in cmdline_re_list:
|
||
if search(re_tup[1], cmdline) is not None:
|
||
badness += int(re_tup[0])
|
||
|
||
if re_match_uid:
|
||
uid = pid_to_uid(pid)
|
||
for re_tup in uid_re_list:
|
||
if search(re_tup[1], uid) is not None:
|
||
if pid_to_cmdline(pid) == '':
|
||
# skip kthreads
|
||
continue
|
||
badness += int(re_tup[0])
|
||
|
||
except FileNotFoundError:
|
||
continue
|
||
except ProcessLookupError:
|
||
continue
|
||
pid_badness_list.append((pid, badness))
|
||
|
||
# Make list of (pid, badness) tuples, sorted by 'badness' values
|
||
pid_tuple_list = sorted(
|
||
pid_badness_list, key=itemgetter(1), reverse=True)[0]
|
||
|
||
pid = pid_tuple_list[0]
|
||
|
||
# Get maximum 'badness' value
|
||
victim_badness = pid_tuple_list[1]
|
||
|
||
return pid, victim_badness
|
||
|
||
|
||
def find_victim_and_send_signal(signal):
|
||
"""
|
||
Find victim with highest badness and send SIGTERM/SIGKILL
|
||
"""
|
||
#print()
|
||
|
||
pid, victim_badness = fattest()
|
||
name = pid_to_name(pid)
|
||
|
||
if victim_badness >= min_badness:
|
||
|
||
# Try to send signal to found victim
|
||
|
||
# Get VmRSS and VmSwap and cmdline of victim process and try to send
|
||
# signal
|
||
try:
|
||
with open('/proc/' + pid + '/status') as f:
|
||
for n, line in enumerate(f):
|
||
|
||
if n is uid_index:
|
||
uid = line.split('\t')[1]
|
||
continue
|
||
|
||
|
||
if n is vm_size_index:
|
||
vm_size = kib_to_mib(int(line.split('\t')[1][:-4]))
|
||
continue
|
||
|
||
if n is vm_rss_index:
|
||
vm_rss = kib_to_mib(int(line.split('\t')[1][:-4]))
|
||
continue
|
||
|
||
if detailed_rss:
|
||
|
||
if n is anon_index:
|
||
anon_rss = kib_to_mib(
|
||
int(line.split('\t')[1][:-4]))
|
||
continue
|
||
|
||
if n is file_index:
|
||
file_rss = kib_to_mib(
|
||
int(line.split('\t')[1][:-4]))
|
||
continue
|
||
|
||
if n is shmem_index:
|
||
shmem_rss = kib_to_mib(
|
||
int(line.split('\t')[1][:-4]))
|
||
continue
|
||
|
||
if n is vm_swap_index:
|
||
vm_swap = kib_to_mib(int(line.split('\t')[1][:-4]))
|
||
break
|
||
|
||
with open('/proc/' + pid + '/cmdline') as file:
|
||
try:
|
||
cmdline = file.readlines()[0].replace('\x00', ' ')
|
||
except IndexError:
|
||
cmdline = ''
|
||
except FileNotFoundError:
|
||
pass
|
||
except ProcessLookupError:
|
||
pass
|
||
except IndexError:
|
||
pass
|
||
except ValueError:
|
||
pass
|
||
|
||
oom_score = rline1('/proc/' + pid + '/oom_score') # тут может быть FileNotFoundError!
|
||
oom_score_adj = rline1('/proc/' + pid + '/oom_score_adj')
|
||
|
||
len_vm = len(str(vm_size))
|
||
|
||
if detailed_rss:
|
||
victim_info = '\033[4mFound the victim with highest badness:\033[0m' \
|
||
'\n Name: \033[33m{}\033[0m' \
|
||
'\n PID: \033[33m{}\033[0m' \
|
||
'\n UID: \033[33m{}\033[0m' \
|
||
'\n Badness: \033[33m{}\033[0m, ' \
|
||
'oom_score: \033[33m{}\033[0m, ' \
|
||
'oom_score_adj: \033[33m{}\033[0m' \
|
||
'\n VmSize: \033[33m{}\033[0m MiB' \
|
||
'\n VmRSS: \033[33m{}\033[0m MiB (' \
|
||
'Anon: \033[33m{}\033[0m MiB, ' \
|
||
'File: \033[33m{}\033[0m MiB, ' \
|
||
'Shmem: \033[33m{}\033[0m MiB)' \
|
||
'\n VmSwap: \033[33m{}\033[0m MiB' \
|
||
'\n CmdLine: \033[33m{}\033[0m'.format(
|
||
name, pid, uid,
|
||
victim_badness, oom_score, oom_score_adj,
|
||
vm_size, str(vm_rss).rjust(len_vm, ' '),
|
||
anon_rss, file_rss, shmem_rss,
|
||
str(vm_swap).rjust(len_vm, ' '), cmdline)
|
||
else:
|
||
victim_info = '\033[4mFound the victim with highest badness:\033[0m' \
|
||
'\n Name: \033[33m{}\033[0m' \
|
||
'\n PID: \033[33m{}\033[0m' \
|
||
'\n UID: \033[33m{}\033[0m' \
|
||
'\n Badness: \033[33m{}\033[0m, ' \
|
||
'oom_score: \033[33m{}\033[0m, ' \
|
||
'oom_score_adj: \033[33m{}\033[0m' \
|
||
'\n VmSize: \033[33m{}\033[0m MiB' \
|
||
'\n VmRSS: \033[33m{}\033[0m MiB' \
|
||
'\n VmSwap: \033[33m{}\033[0m MiB' \
|
||
'\n CmdLine: \033[33m{}\033[0m'.format(
|
||
name, pid, uid, victim_badness, vm_size,
|
||
str(vm_rss).rjust(len_vm, ' '),
|
||
str(vm_swap).rjust(len_vm, ' '), cmdline)
|
||
|
||
if execute_the_command and signal is SIGTERM and name in etc_dict:
|
||
command = etc_dict[name]
|
||
exit_status = os.system(etc_dict[name])
|
||
if exit_status == 0:
|
||
exit_status = '\033[32m0\033[0m'
|
||
else:
|
||
exit_status = '\033[31m{}\033[0m'.format(exit_status)
|
||
|
||
response_time = time() - time0
|
||
|
||
etc_info = '{}' \
|
||
'\n\033[4mImplement corrective action:\033[0m\n Execute the command: \033[4m{}\033[0m' \
|
||
'\n Exit status: {}; response time: {} ms'.format(
|
||
victim_info, command, exit_status,
|
||
round(response_time * 1000))
|
||
|
||
|
||
# update stat_dict
|
||
key = "Run the command '\033[35m{}\033[0m'".format(command)
|
||
if key not in stat_dict:
|
||
stat_dict.update({key: 1})
|
||
else:
|
||
new_value = stat_dict[key] + 1
|
||
stat_dict.update({key: new_value})
|
||
|
||
|
||
print(mem_info)
|
||
print(etc_info)
|
||
if gui_notifications:
|
||
send_notify_etc(pid, name, command)
|
||
|
||
else:
|
||
|
||
try:
|
||
os.kill(int(pid), signal)
|
||
response_time = time() - time0
|
||
send_result = '\033[32mOK\033[0m; response time: {} ms'.format(
|
||
round(response_time * 1000))
|
||
|
||
# update stat_dict
|
||
key = 'Send \033[35m{}\033[0m to \033[35m{}\033[0m'.format(sig_dict[signal], name)
|
||
if key not in stat_dict:
|
||
stat_dict.update({key: 1})
|
||
else:
|
||
new_value = stat_dict[key] + 1
|
||
stat_dict.update({key: new_value})
|
||
|
||
if gui_notifications:
|
||
send_notify(signal, name, pid)
|
||
|
||
except FileNotFoundError:
|
||
response_time = time() - time0
|
||
send_result = 'no such process; response time: {} ms'.format(
|
||
round(response_time * 1000))
|
||
except ProcessLookupError:
|
||
response_time = time() - time0
|
||
send_result = 'no such process; response time: {} ms'.format(
|
||
round(response_time * 1000))
|
||
|
||
preventing_oom_message = '{}' \
|
||
'\n\033[4mImplement corrective action:\033[0m\n ' \
|
||
'Sending \033[4m{}\033[0m to the victim; {}'.format(
|
||
victim_info, sig_dict[signal], send_result)
|
||
print(mem_info)
|
||
print(preventing_oom_message)
|
||
print('\n\033[4mDuration of work: {}; number of corrective actions:\033[0m'.format(
|
||
format_time(time() - start_time)))
|
||
for key in stat_dict:
|
||
print(' - {}: {}'.format(key, stat_dict[key]))
|
||
|
||
else:
|
||
|
||
response_time = time() - time0
|
||
victim_badness_is_too_small = ' victim badness {} < min_b' \
|
||
'adness {}; nothing to do; response time: {} ms'.format(
|
||
victim_badness,
|
||
min_badness,
|
||
round(response_time * 1000))
|
||
|
||
print(victim_badness_is_too_small)
|
||
|
||
sleep_after_send_signal(signal)
|
||
|
||
|
||
def sleep_after_check_mem():
|
||
"""Specify sleep times depends on rates and avialable memory."""
|
||
t_mem = mem_available / rate_mem
|
||
t_swap = swap_free / rate_swap
|
||
t_zram = (mem_total - mem_used_zram) / rate_zram
|
||
|
||
t_mem_swap = t_mem + t_swap
|
||
t_mem_zram = t_mem + t_zram
|
||
|
||
if t_mem_swap <= t_mem_zram:
|
||
t = t_mem_swap
|
||
else:
|
||
t = t_mem_zram
|
||
|
||
try:
|
||
if print_sleep_periods:
|
||
print('sleep', round(t, 2),
|
||
' (t_mem={}, t_swap={}, t_zram={})'.format(
|
||
round(t_mem, 2),
|
||
round(t_swap, 2),
|
||
round(t_zram, 2)))
|
||
stderr.flush()
|
||
sleep(t)
|
||
except KeyboardInterrupt:
|
||
exit()
|
||
|
||
|
||
def calculate_percent(arg_key):
|
||
"""
|
||
parse conf dict
|
||
Calculate mem_min_KEY_percent.
|
||
|
||
Try use this one)
|
||
arg_key: str key for config_dict
|
||
returns int mem_min_percent or NoneType if got some error
|
||
"""
|
||
|
||
if arg_key in config_dict:
|
||
mem_min = config_dict[arg_key]
|
||
|
||
if mem_min.endswith('%'):
|
||
# truncate percents, so we have a number
|
||
mem_min_percent = mem_min[:-1].strip()
|
||
# then 'float test'
|
||
mem_min_percent = string_to_float_convert_test(mem_min_percent)
|
||
if mem_min_percent is None:
|
||
print('Invalid {} value, not float\nExit'.format(arg_key))
|
||
exit()
|
||
# Final validations...
|
||
if mem_min_percent < 0 or mem_min_percent > 100:
|
||
print(
|
||
'{}, as percents value, out of range [0; 100]\nExit'.format(arg_key))
|
||
exit()
|
||
|
||
# mem_min_sigterm_percent is clean and valid float percentage. Can
|
||
# translate into Kb
|
||
mem_min_kb = mem_min_percent / 100 * mem_total
|
||
mem_min_mb = round(mem_min_kb / 1024)
|
||
|
||
elif mem_min.endswith('M'):
|
||
mem_min_mb = string_to_float_convert_test(mem_min[:-1].strip())
|
||
if mem_min_mb is None:
|
||
print('Invalid {} value, not float\nExit'.format(arg_key))
|
||
exit()
|
||
mem_min_kb = mem_min_mb * 1024
|
||
if mem_min_kb > mem_total:
|
||
print(
|
||
'{} value can not be greater then MemTotal ({} MiB)\nExit'.format(
|
||
arg_key, round(
|
||
mem_total / 1024)))
|
||
exit()
|
||
mem_min_percent = mem_min_kb / mem_total * 100
|
||
|
||
else:
|
||
print('Invalid {} units in config.\n Exit'.format(arg_key))
|
||
mem_min_percent = None
|
||
|
||
else:
|
||
print('{} not in config\nExit'.format(arg_key))
|
||
mem_min_percent = None
|
||
|
||
return mem_min_kb, mem_min_mb, mem_min_percent
|
||
|
||
|
||
##########################################################################
|
||
|
||
|
||
# find mem_total
|
||
# find positions of SwapFree and SwapTotal in /proc/meminfo
|
||
|
||
with open('/proc/meminfo') as file:
|
||
mem_list = file.readlines()
|
||
|
||
mem_list_names = []
|
||
for s in mem_list:
|
||
mem_list_names.append(s.split(':')[0])
|
||
|
||
if mem_list_names[2] != 'MemAvailable':
|
||
print('Your Linux kernel is too old, Linux 3.14+ requied\nExit')
|
||
exit()
|
||
|
||
swap_total_index = mem_list_names.index('SwapTotal')
|
||
swap_free_index = swap_total_index + 1
|
||
|
||
mem_total = int(mem_list[0].split(':')[1].strip(' kB\n'))
|
||
|
||
# Get names from /proc/*/status to be able to get VmRSS and VmSwap values
|
||
|
||
with open('/proc/self/status') as file:
|
||
status_list = file.readlines()
|
||
|
||
status_names = []
|
||
for s in status_list:
|
||
status_names.append(s.split(':')[0])
|
||
|
||
vm_size_index = status_names.index('VmSize')
|
||
vm_rss_index = status_names.index('VmRSS')
|
||
vm_swap_index = status_names.index('VmSwap')
|
||
uid_index = status_names.index('Uid')
|
||
|
||
try:
|
||
anon_index = status_names.index('RssAnon')
|
||
file_index = status_names.index('RssFile')
|
||
shmem_index = status_names.index('RssShmem')
|
||
detailed_rss = True
|
||
#print(detailed_rss, 'detailed_rss')
|
||
except ValueError:
|
||
detailed_rss = False
|
||
#print('It is not Linux 4.5+')
|
||
|
||
##########################################################################
|
||
|
||
|
||
# Configurations
|
||
|
||
|
||
# directory where the script is running
|
||
cd = os.getcwd()
|
||
|
||
#print('CD:', cd)
|
||
|
||
# where to look for a config if not specified via the -c/--config option
|
||
default_configs = (cd + '/nohang.conf', '/etc/nohang/nohang.conf')
|
||
|
||
# universal message if config is invalid
|
||
conf_err_mess = '\nSet up the path to the valid conf' \
|
||
'ig file with -c/--config option!\nExit'
|
||
|
||
|
||
# Cmd argparse
|
||
parser = ArgumentParser()
|
||
parser.add_argument(
|
||
'-c',
|
||
'--config',
|
||
help="""path to the config file, default values:
|
||
./nohang.conf, /etc/nohang/nohang.conf""",
|
||
default=None,
|
||
type=str
|
||
)
|
||
|
||
args = parser.parse_args()
|
||
|
||
arg_config = args.config
|
||
|
||
|
||
if arg_config is None:
|
||
|
||
config = None
|
||
for i in default_configs:
|
||
if os.path.exists(i):
|
||
config = i
|
||
break
|
||
if config is None:
|
||
print('Default configuration was not found\n',
|
||
conf_err_mess)
|
||
exit()
|
||
|
||
else:
|
||
|
||
if os.path.exists(arg_config):
|
||
config = arg_config
|
||
else:
|
||
print("File {} doesn't exists{}".format(
|
||
arg_config, conf_err_mess))
|
||
exit()
|
||
|
||
|
||
print('The path to the config:', config)
|
||
|
||
|
||
##########################################################################
|
||
|
||
# parsing the config with obtaining the parameters dictionary
|
||
|
||
# conf_parameters_dict
|
||
# conf_restart_dict
|
||
|
||
# dictionary with config options
|
||
config_dict = dict()
|
||
|
||
processname_re_list = []
|
||
cmdline_re_list = []
|
||
uid_re_list = []
|
||
|
||
# dictionary with names and commands for the parameter
|
||
# execute_the_command
|
||
# тут тоже список нужен, а не словарь
|
||
etc_dict = dict()
|
||
|
||
# will store corrective actions stat
|
||
stat_dict = dict()
|
||
|
||
try:
|
||
with open(config) as f:
|
||
|
||
for line in f:
|
||
|
||
a = line.startswith('#')
|
||
b = line.startswith('\n')
|
||
c = line.startswith('\t')
|
||
d = line.startswith(' ')
|
||
|
||
etc = line.startswith('$ETC')
|
||
|
||
if not a and not b and not c and not d and not etc:
|
||
a = line.partition('=')
|
||
config_dict[a[0].strip()] = a[2].strip()
|
||
|
||
if etc:
|
||
a = line[4:].split('///')
|
||
etc_name = a[0].strip()
|
||
etc_command = a[1].strip()
|
||
if len(etc_name) > 15:
|
||
print('Invalid config, the length of the process '
|
||
'name must not exceed 15 characters\nExit')
|
||
exit()
|
||
etc_dict[etc_name] = etc_command
|
||
|
||
|
||
# NEED VALIDATION!
|
||
if line.startswith('@PROCESSNAME_RE'):
|
||
a = line.partition('@PROCESSNAME_RE')[2].strip(' \n').partition('///')
|
||
processname_re_list.append((a[0].strip(' '), a[2].strip(' ')))
|
||
|
||
if line.startswith('@CMDLINE_RE'):
|
||
a = line.partition('@CMDLINE_RE')[2].strip(' \n').partition('///')
|
||
cmdline_re_list.append((a[0].strip(' '), a[2].strip(' ')))
|
||
|
||
if line.startswith('@UID_RE'):
|
||
a = line.partition('@UID_RE')[2].strip(' \n').partition('///')
|
||
uid_re_list.append((a[0].strip(' '), a[2].strip(' ')))
|
||
|
||
except PermissionError:
|
||
print('PermissionError', conf_err_mess)
|
||
exit()
|
||
except UnicodeDecodeError:
|
||
print('UnicodeDecodeError', conf_err_mess)
|
||
exit()
|
||
except IsADirectoryError:
|
||
print('IsADirectoryError', conf_err_mess)
|
||
exit()
|
||
except IndexError:
|
||
print('IndexError', conf_err_mess)
|
||
exit()
|
||
|
||
# print(processname_re_list)
|
||
# print(cmdline_re_list)
|
||
# print(uid_re_list)
|
||
|
||
##########################################################################
|
||
|
||
|
||
# extracting parameters from the dictionary
|
||
# check for all necessary parameters
|
||
# validation of all parameters
|
||
|
||
print_config = conf_parse_bool('print_config')
|
||
print_mem_check_results = conf_parse_bool('print_mem_check_results')
|
||
print_sleep_periods = conf_parse_bool('print_sleep_periods')
|
||
realtime_ionice = conf_parse_bool('realtime_ionice')
|
||
mlockall = conf_parse_bool('mlockall')
|
||
gui_low_memory_warnings = conf_parse_bool('gui_low_memory_warnings')
|
||
gui_notifications = conf_parse_bool('gui_notifications')
|
||
decrease_oom_score_adj = conf_parse_bool('decrease_oom_score_adj')
|
||
execute_the_command = conf_parse_bool('execute_the_command')
|
||
|
||
regex_matching = conf_parse_bool('regex_matching')
|
||
|
||
re_match_cmdline = conf_parse_bool('re_match_cmdline')
|
||
|
||
re_match_uid = conf_parse_bool('re_match_uid')
|
||
|
||
if regex_matching or re_match_cmdline or re_match_uid:
|
||
from re import search
|
||
import sre_constants
|
||
|
||
mem_min_sigterm_kb, mem_min_sigterm_mb, mem_min_sigterm_percent = calculate_percent(
|
||
'mem_min_sigterm')
|
||
mem_min_sigkill_kb, mem_min_sigkill_mb, mem_min_sigkill_percent = calculate_percent(
|
||
'mem_min_sigkill')
|
||
|
||
zram_max_sigterm_kb, zram_max_sigterm_mb, zram_max_sigterm_percent = calculate_percent(
|
||
'zram_max_sigterm')
|
||
zram_max_sigkill_kb, zram_max_sigkill_mb, zram_max_sigkill_percent = calculate_percent(
|
||
'zram_max_sigkill')
|
||
|
||
mem_min_warnings_kb, mem_min_warnings_mb, mem_min_warnings_percent = calculate_percent(
|
||
'mem_min_warnings')
|
||
zram_max_warnings_kb, zram_max_warnings_mb, zram_max_warnings_percent = calculate_percent(
|
||
'zram_max_warnings')
|
||
|
||
|
||
if 'realtime_ionice_classdata' in config_dict:
|
||
realtime_ionice_classdata = string_to_int_convert_test(
|
||
config_dict['realtime_ionice_classdata'])
|
||
if realtime_ionice_classdata is None:
|
||
print('Invalid value of the "realtime_ionice_classdata" parameter.')
|
||
print('Valid values are integers from the range [0; 7].')
|
||
print('Exit')
|
||
exit()
|
||
if realtime_ionice_classdata < 0 or realtime_ionice_classdata > 7:
|
||
print('Invalid value of the "realtime_ionice_classdata" parameter.')
|
||
print('Valid values are integers from the range [0; 7].')
|
||
print('Exit')
|
||
exit()
|
||
else:
|
||
print('All the necessary parameters must be in the config')
|
||
print('There is no "realtime_ionice_classdata" parameter in the config')
|
||
exit()
|
||
|
||
|
||
if 'niceness' in config_dict:
|
||
niceness = string_to_int_convert_test(config_dict['niceness'])
|
||
if niceness is None:
|
||
print('Invalid niceness value, not integer\nExit')
|
||
exit()
|
||
if niceness < -20 or niceness > 19:
|
||
print('niceness out of range [-20; 19]\nExit')
|
||
exit()
|
||
else:
|
||
print('niceness not in config\nExit')
|
||
exit()
|
||
|
||
|
||
if 'oom_score_adj' in config_dict:
|
||
oom_score_adj = string_to_int_convert_test(
|
||
config_dict['oom_score_adj'])
|
||
if oom_score_adj is None:
|
||
print('Invalid oom_score_adj value, not integer\nExit')
|
||
exit()
|
||
if oom_score_adj < -1000 or oom_score_adj > 1000:
|
||
print('oom_score_adj out of range [-1000; 1000]\nExit')
|
||
exit()
|
||
else:
|
||
print('oom_score_adj not in config\nExit')
|
||
exit()
|
||
|
||
|
||
if 'rate_mem' in config_dict:
|
||
rate_mem = string_to_float_convert_test(config_dict['rate_mem'])
|
||
if rate_mem is None:
|
||
print('Invalid rate_mem value, not float\nExit')
|
||
exit()
|
||
if rate_mem <= 0:
|
||
print('rate_mem MUST be > 0\nExit')
|
||
exit()
|
||
else:
|
||
print('rate_mem not in config\nExit')
|
||
exit()
|
||
|
||
|
||
if 'rate_swap' in config_dict:
|
||
rate_swap = string_to_float_convert_test(config_dict['rate_swap'])
|
||
if rate_swap is None:
|
||
print('Invalid rate_swap value, not float\nExit')
|
||
exit()
|
||
if rate_swap <= 0:
|
||
print('rate_swap MUST be > 0\nExit')
|
||
exit()
|
||
else:
|
||
print('rate_swap not in config\nExit')
|
||
exit()
|
||
|
||
|
||
if 'rate_zram' in config_dict:
|
||
rate_zram = string_to_float_convert_test(config_dict['rate_zram'])
|
||
if rate_zram is None:
|
||
print('Invalid rate_zram value, not float\nExit')
|
||
exit()
|
||
if rate_zram <= 0:
|
||
print('rate_zram MUST be > 0\nExit')
|
||
exit()
|
||
else:
|
||
print('rate_zram not in config\nExit')
|
||
exit()
|
||
|
||
|
||
# НУЖНА ВАЛИДАЦИЯ НА МЕСТЕ!
|
||
if 'swap_min_sigterm' in config_dict:
|
||
swap_min_sigterm = config_dict['swap_min_sigterm']
|
||
else:
|
||
print('swap_min_sigterm not in config\nExit')
|
||
exit()
|
||
|
||
|
||
# НУЖНА ВАЛИДАЦИЯ НА МЕСТЕ!
|
||
if 'swap_min_sigkill' in config_dict:
|
||
swap_min_sigkill = config_dict['swap_min_sigkill']
|
||
else:
|
||
print('swap_min_sigkill not in config\nExit')
|
||
exit()
|
||
|
||
|
||
if 'min_delay_after_sigterm' in config_dict:
|
||
min_delay_after_sigterm = string_to_float_convert_test(
|
||
config_dict['min_delay_after_sigterm'])
|
||
if min_delay_after_sigterm is None:
|
||
print('Invalid min_delay_after_sigterm value, not float\nExit')
|
||
exit()
|
||
if min_delay_after_sigterm < 0:
|
||
print('min_delay_after_sigterm must be positiv\nExit')
|
||
exit()
|
||
else:
|
||
print('min_delay_after_sigterm not in config\nExit')
|
||
exit()
|
||
|
||
|
||
if 'min_delay_after_sigkill' in config_dict:
|
||
min_delay_after_sigkill = string_to_float_convert_test(
|
||
config_dict['min_delay_after_sigkill'])
|
||
if min_delay_after_sigkill is None:
|
||
print('Invalid min_delay_after_sigkill value, not float\nExit')
|
||
exit()
|
||
if min_delay_after_sigkill < 0:
|
||
print('min_delay_after_sigkill must be positiv\nExit')
|
||
exit()
|
||
else:
|
||
print('min_delay_after_sigkill not in config\nExit')
|
||
exit()
|
||
|
||
|
||
if 'min_badness' in config_dict:
|
||
min_badness = string_to_int_convert_test(
|
||
config_dict['min_badness'])
|
||
if min_badness is None:
|
||
print('Invalid min_badness value, not integer\nExit')
|
||
exit()
|
||
if min_badness < 0 or min_badness > 1000:
|
||
print('Invalud min_badness value\nExit')
|
||
exit()
|
||
else:
|
||
print('min_badness not in config\nExit')
|
||
exit()
|
||
|
||
|
||
if 'oom_score_adj_max' in config_dict:
|
||
oom_score_adj_max = string_to_int_convert_test(
|
||
config_dict['oom_score_adj_max'])
|
||
if oom_score_adj_max is None:
|
||
print('Invalid oom_score_adj_max value, not integer\nExit')
|
||
exit()
|
||
if oom_score_adj_max < 0 or oom_score_adj_max > 1000:
|
||
print('Invalid oom_score_adj_max value\nExit')
|
||
exit()
|
||
else:
|
||
print('oom_score_adj_max not in config\nExit')
|
||
exit()
|
||
|
||
|
||
if 'min_time_between_warnings' in config_dict:
|
||
min_time_between_warnings = string_to_float_convert_test(
|
||
config_dict['min_time_between_warnings'])
|
||
if min_time_between_warnings is None:
|
||
print('Invalid min_time_between_warnings value, not float\nExit')
|
||
exit()
|
||
if min_time_between_warnings < 1 or min_time_between_warnings > 300:
|
||
print('min_time_between_warnings value out of range [1; 300]\nExit')
|
||
exit()
|
||
else:
|
||
print('min_time_between_warnings not in config\nExit')
|
||
exit()
|
||
|
||
|
||
# НА МЕСТЕ!!!
|
||
if 'swap_min_warnings' in config_dict:
|
||
swap_min_warnings = config_dict['swap_min_warnings']
|
||
else:
|
||
print('swap_min_warnings not in config\nExit')
|
||
exit()
|
||
|
||
|
||
##########################################################################
|
||
|
||
|
||
# Get Kibibytes levels
|
||
|
||
|
||
# Returns Kibibytes value if absolute value was set in config,
|
||
# or tuple with percentage
|
||
def sig_level_to_kb_swap(string):
|
||
"""Returns Kibibytes value if abs val was set in config, or tuple with %"""
|
||
if string.endswith('%'):
|
||
return float(string[:-1].strip()), True
|
||
elif string.endswith('M'):
|
||
return float(string[:-1].strip()) * 1024
|
||
else:
|
||
print('Invalid config file. There are invalid units somewhere\nExit')
|
||
exit()
|
||
|
||
|
||
# So, get them
|
||
swap_min_sigterm_swap = sig_level_to_kb_swap(swap_min_sigterm)
|
||
swap_min_sigkill_swap = sig_level_to_kb_swap(swap_min_sigkill)
|
||
|
||
swap_min_warnings_swap = sig_level_to_kb_swap(swap_min_warnings)
|
||
|
||
|
||
if isinstance(swap_min_sigterm_swap, tuple):
|
||
swap_term_is_percent = True
|
||
swap_min_sigterm_percent = swap_min_sigterm_swap[0]
|
||
else:
|
||
swap_term_is_percent = False
|
||
swap_min_sigterm_kb = swap_min_sigterm_swap
|
||
|
||
if isinstance(swap_min_sigkill_swap, tuple):
|
||
swap_kill_is_percent = True
|
||
swap_min_sigkill_percent = swap_min_sigkill_swap[0]
|
||
else:
|
||
swap_kill_is_percent = False
|
||
swap_min_sigkill_kb = swap_min_sigkill_swap
|
||
|
||
|
||
if isinstance(swap_min_warnings_swap, tuple):
|
||
swap_warn_is_percent = True
|
||
swap_min_warnings_percent = swap_min_warnings_swap[0]
|
||
else:
|
||
swap_warn_is_percent = False
|
||
swap_min_warnings_kb = swap_min_warnings_swap
|
||
|
||
|
||
##########################################################################
|
||
|
||
# self-defense
|
||
|
||
|
||
# возожно стоит убрать поддержку mlockall и ionice
|
||
|
||
# Increase priority
|
||
try:
|
||
os.nice(niceness)
|
||
niceness_result = 'OK'
|
||
except PermissionError:
|
||
niceness_result = 'Fail'
|
||
pass
|
||
|
||
# Deny self-killing
|
||
try:
|
||
with open('/proc/self/oom_score_adj', 'w') as file:
|
||
file.write('{}\n'.format(oom_score_adj))
|
||
oom_score_adj_result = 'OK'
|
||
except PermissionError:
|
||
oom_score_adj_result = 'Fail'
|
||
except OSError:
|
||
oom_score_adj_result = 'Fail'
|
||
|
||
# Deny process swapping
|
||
if mlockall:
|
||
from ctypes import CDLL
|
||
result = CDLL('libc.so.6', use_errno=True).mlockall(3)
|
||
if result is 0:
|
||
mla_res = 'OK'
|
||
else:
|
||
mla_res = 'Fail'
|
||
else:
|
||
mla_res = ''
|
||
|
||
|
||
|
||
|
||
|
||
if self_uid == 0:
|
||
root = True
|
||
decrease_res = 'OK'
|
||
else:
|
||
root = False
|
||
decrease_res = 'Impossible'
|
||
|
||
|
||
if root and realtime_ionice:
|
||
os.system('ionice -c 1 -n {} -p {}'.format(
|
||
realtime_ionice_classdata, self_pid))
|
||
|
||
|
||
##########################################################################
|
||
|
||
if print_config:
|
||
|
||
print(
|
||
'\n1. Memory levels to respond to as an OOM threat\n[displaying these options need fix]\n')
|
||
|
||
print('mem_min_sigterm: {} MiB, {} %'.format(
|
||
round(mem_min_sigterm_mb), round(mem_min_sigterm_percent, 1)))
|
||
print('mem_min_sigkill: {} MiB, {} %'.format(
|
||
round(mem_min_sigkill_mb), round(mem_min_sigkill_percent, 1)))
|
||
|
||
print('swap_min_sigterm: {}'.format(swap_min_sigterm))
|
||
print('swap_min_sigkill: {}'.format(swap_min_sigkill))
|
||
|
||
print('zram_max_sigterm: {} MiB, {} %'.format(
|
||
round(zram_max_sigterm_mb), round(zram_max_sigterm_percent, 1)))
|
||
print('zram_max_sigkill: {} MiB, {} %'.format(
|
||
round(zram_max_sigkill_mb), round(zram_max_sigkill_percent, 1)))
|
||
|
||
print('\n2. The frequency of checking the level of available memory (and CPU usage)\n')
|
||
print('rate_mem: {}'.format(rate_mem))
|
||
print('rate_swap: {}'.format(rate_swap))
|
||
print('rate_zram: {}'.format(rate_zram))
|
||
|
||
print('\n3. The prevention of killing innocent victims\n')
|
||
print('min_delay_after_sigterm: {}'.format(min_delay_after_sigterm))
|
||
print('min_delay_after_sigkill: {}'.format(min_delay_after_sigkill))
|
||
print('min_badness: {}'.format(min_badness))
|
||
|
||
# False (OK) - OK не нужен когда фолс
|
||
print('decrease_oom_score_adj: {}'.format(
|
||
decrease_oom_score_adj
|
||
))
|
||
if decrease_oom_score_adj:
|
||
print('oom_score_adj_max: {}'.format(oom_score_adj_max))
|
||
|
||
print('\n4. Impact on the badness of processes via matching their' \
|
||
' names, cmdlines ir UIDs with regular expressions\n')
|
||
|
||
print('regex_matching: {}'.format(regex_matching))
|
||
if regex_matching:
|
||
print('prefer_regex: {}'.format(prefer_regex))
|
||
print('prefer_factor: {}'.format(prefer_factor))
|
||
print('avoid_regex: {}'.format(avoid_regex))
|
||
print('avoid_factor: {}'.format(avoid_factor))
|
||
print()
|
||
|
||
print('re_match_cmdline: {}'.format(re_match_cmdline))
|
||
if re_match_cmdline:
|
||
print('prefer_re_cmdline: {}'.format(prefer_re_cmdline))
|
||
print('prefer_cmd_factor: {}'.format(prefer_cmd_factor))
|
||
print('avoid_re_cmdline: {}'.format(avoid_re_cmdline))
|
||
print('avoid_cmd_factor: {}'.format(avoid_cmd_factor))
|
||
print()
|
||
|
||
print('re_match_uid: {}'.format(re_match_uid))
|
||
if re_match_uid:
|
||
print('prefer_re_uid: {}'.format(prefer_re_uid))
|
||
print('prefer_uid_factor: {}'.format(prefer_uid_factor))
|
||
print('avoid_re_uid: {}'.format(avoid_re_uid))
|
||
print('avoid_uid_factor: {}'.format(avoid_uid_factor))
|
||
|
||
print('\n5. The execution of a specific command instead of sending the\nSIGTERM signal\n')
|
||
print('execute_the_command: {}'.format(execute_the_command))
|
||
if execute_the_command:
|
||
print('\nPROCESS NAME COMMAND TO EXECUTE')
|
||
for key in etc_dict:
|
||
print('{} {}'.format(key.ljust(15), etc_dict[key]))
|
||
|
||
print('\n6. GUI notifications:\n- OOM prevention results and\n- low memory warnings\n')
|
||
print('gui_notifications: {}'.format(gui_notifications))
|
||
|
||
print('gui_low_memory_warnings: {}'.format(gui_low_memory_warnings))
|
||
if gui_low_memory_warnings:
|
||
print('min_time_between_warnings: {}'.format(min_time_between_warnings))
|
||
|
||
print('mem_min_warnings: {} MiB, {} %'.format(
|
||
round(mem_min_warnings_mb), round(mem_min_warnings_percent, 1)))
|
||
|
||
print('swap_min_warnings: {}'.format(swap_min_warnings))
|
||
|
||
print('zram_max_warnings: {} MiB, {} %'.format(
|
||
round(zram_max_warnings_mb), round(zram_max_warnings_percent, 1)))
|
||
|
||
print(
|
||
'\n7. Preventing the slowing down of the program'
|
||
'\n[displaying these options need fix]\n')
|
||
print('mlockall: {} ({})'.format(mlockall, mla_res))
|
||
print('niceness: {} ({})'.format(
|
||
niceness, niceness_result
|
||
))
|
||
print('oom_score_adj: {} ({})'.format(
|
||
oom_score_adj, oom_score_adj_result
|
||
))
|
||
|
||
print('realtime_ionice: {} ({})'.format(realtime_ionice, ''))
|
||
|
||
if realtime_ionice:
|
||
print('realtime_ionice_classdata: {}'.format(realtime_ionice_classdata))
|
||
|
||
print('\n8. Output verbosity\n')
|
||
print('print_config: {}'.format(print_config))
|
||
print('print_mem_check_results: {}'.format(print_mem_check_results))
|
||
print('print_sleep_periods: {}\n'.format(print_sleep_periods))
|
||
|
||
|
||
##########################################################################
|
||
|
||
|
||
# for calculating the column width when printing mem and zram
|
||
mem_len = len(str(round(mem_total / 1024.0)))
|
||
|
||
if gui_notifications or gui_low_memory_warnings:
|
||
from subprocess import Popen, TimeoutExpired
|
||
notify_sig_dict = {SIGKILL: 'Killing',
|
||
SIGTERM: 'Terminating'}
|
||
|
||
rate_mem = rate_mem * 1048576
|
||
rate_swap = rate_swap * 1048576
|
||
rate_zram = rate_zram * 1048576
|
||
|
||
warn_time_now = 0
|
||
warn_time_delta = 1000
|
||
warn_timer = 0
|
||
|
||
x = time() - start_time
|
||
print('The duration of startup:',
|
||
round(x * 1000, 1), 'ms')
|
||
|
||
print('Monitoring started!')
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
def save_env_cache():
|
||
z = '{}\n'.format(int(time()))
|
||
a = root_notify_env()
|
||
#print(a)
|
||
for i in a:
|
||
z = z + '{}\x00{}\x00{}\n'.format(i[0], i[1], i[2])
|
||
write(cache_path, z)
|
||
os.chmod(cache_path, 0000)
|
||
return a
|
||
|
||
|
||
def read_env_cache():
|
||
x, y = [], []
|
||
try:
|
||
with open(cache_path) as f:
|
||
for n, line in enumerate(f):
|
||
if n is 0:
|
||
t = line[:-1]
|
||
y.append(t)
|
||
continue
|
||
if n > 0:
|
||
x.append(line[:-1].split('\x00'))
|
||
except FileNotFoundError:
|
||
return None
|
||
y.append(x)
|
||
return y
|
||
|
||
|
||
def root_env_cache():
|
||
cache = read_env_cache()
|
||
if cache is None:
|
||
print('cache not found, get new env and cache it')
|
||
return save_env_cache()
|
||
delta_t = time() - int(cache[0])
|
||
if delta_t > cache_time:
|
||
print('cache time: {}, delta: {}, ' \
|
||
'get new env and cache it'.format(
|
||
cache_time, round(delta_t)))
|
||
save_env_cache()
|
||
return root_notify_env()
|
||
else:
|
||
print('cache time: {}, delta: {}, ' \
|
||
'get cached env'.format(
|
||
cache_time, round(delta_t)))
|
||
return cache[1]
|
||
|
||
|
||
t1 = time()
|
||
# root_env_cache()
|
||
t2 = time()
|
||
# print(t2 - t1)
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
stdout.flush()
|
||
|
||
#exit()
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
# ввести через конфиг!
|
||
sigterm_psi = 60
|
||
sigkill_psi = 95
|
||
avg_min_time = 4
|
||
psi_min_sleep_time_after_action = 16
|
||
|
||
|
||
##########################################################################
|
||
|
||
|
||
if psi_support:
|
||
ta0 = time()
|
||
a0 = psi_mem_some_avg_total()
|
||
kill_psi_t0 = time()
|
||
term_psi_t0 = time()
|
||
|
||
while True:
|
||
|
||
if psi_support:
|
||
|
||
ta1= time()
|
||
dt = ta1 - ta0
|
||
|
||
if dt >= avg_min_time:
|
||
|
||
a1 = psi_mem_some_avg_total()
|
||
avg = (a1 - a0) / (ta1 - ta0) / 10000
|
||
|
||
print(rline1(psi_path))
|
||
print('PSI mem some avg: {}, PSI avg time: {}'.format(round(avg, 2), round(dt, 1)))
|
||
ta0 = ta1
|
||
a0 = a1
|
||
|
||
|
||
if avg >= sigkill_psi and time() - kill_psi_t0 >= psi_min_sleep_time_after_action:
|
||
time0 = time()
|
||
mem_info = 'avg ({}) > sigkill_psi ({})'.format(round(avg, 2), sigkill_psi)
|
||
find_victim_and_send_signal(SIGKILL)
|
||
kill_psi_t0 = time()
|
||
elif avg >= sigterm_psi and time() - term_psi_t0 >= psi_min_sleep_time_after_action:
|
||
time0 = time()
|
||
mem_info = 'avg ({}) > sigterm_psi ({})'.format(round(avg, 2), sigterm_psi)
|
||
find_victim_and_send_signal(SIGTERM)
|
||
term_psi_t0 = time()
|
||
else:
|
||
print('PSI is OK or psi_min_sleep_time_after_action did not pass')
|
||
|
||
|
||
|
||
|
||
mem_available, swap_total, swap_free = check_mem_and_swap()
|
||
|
||
# if swap_min_sigkill is set in percent
|
||
if swap_kill_is_percent:
|
||
swap_min_sigkill_kb = swap_total * swap_min_sigkill_percent / 100.0
|
||
|
||
if swap_term_is_percent:
|
||
swap_min_sigterm_kb = swap_total * swap_min_sigterm_percent / 100.0
|
||
|
||
if swap_warn_is_percent:
|
||
swap_min_warnings_kb = swap_total * swap_min_warnings_percent / 100.0
|
||
|
||
|
||
|
||
mem_used_zram = check_zram()
|
||
|
||
|
||
|
||
if print_mem_check_results:
|
||
|
||
# Calculate 'swap-column' width
|
||
swap_len = len(str(round(swap_total / 1024.0)))
|
||
|
||
# Output avialable mem sizes
|
||
if swap_total == 0 and mem_used_zram == 0:
|
||
print('MemAvail: {} M, {} %'.format(
|
||
human(mem_available, mem_len),
|
||
just_percent_mem(mem_available / mem_total)))
|
||
|
||
elif swap_total > 0 and mem_used_zram == 0:
|
||
print('MemAvail: {} M, {} % | SwapFree: {} M, {} %'.format(
|
||
human(mem_available, mem_len),
|
||
just_percent_mem(mem_available / mem_total),
|
||
human(swap_free, swap_len),
|
||
just_percent_swap(swap_free / (swap_total + 0.1))))
|
||
|
||
else:
|
||
print('MemAvail: {} M, {} % | SwapFree: {} M, {} % | Mem'
|
||
'UsedZram: {} M, {} %'.format(
|
||
human(mem_available, mem_len),
|
||
just_percent_mem(mem_available / mem_total),
|
||
human(swap_free, swap_len),
|
||
just_percent_swap(swap_free / (swap_total + 0.1)),
|
||
human(mem_used_zram, mem_len),
|
||
just_percent_mem(mem_used_zram / mem_total)))
|
||
|
||
|
||
|
||
|
||
|
||
# если swap_min_sigkill задан в абсолютной величине и Swap_total = 0
|
||
if swap_total > swap_min_sigkill_kb: # If swap_min_sigkill is absolute
|
||
swap_sigkill_pc = percent(swap_min_sigkill_kb / (swap_total + 0.1))
|
||
else:
|
||
swap_sigkill_pc = '-'
|
||
|
||
|
||
|
||
if swap_total > swap_min_sigterm_kb:
|
||
swap_sigterm_pc = percent(swap_min_sigterm_kb / (swap_total + 0.1))
|
||
else:
|
||
|
||
# печатать так: SwapTotal = 0, ignore swapspace
|
||
swap_sigterm_pc = '-'
|
||
|
||
|
||
|
||
|
||
# далее пошло ветвление
|
||
|
||
|
||
# MEM SWAP KILL
|
||
if mem_available <= mem_min_sigkill_kb and \
|
||
swap_free <= swap_min_sigkill_kb:
|
||
time0 = time()
|
||
|
||
mem_info = '\n\033[4mMemory status that requires corrective actions:' \
|
||
'\033[0m\n MemAvailable [{} MiB, {} %] <= mem_min_sig' \
|
||
'kill [{} MiB, {} %]\n SwapFree [{} MiB, {} %] <= swa' \
|
||
'p_min_sigkill [{} MiB, {} %]'.format(
|
||
kib_to_mib(mem_available),
|
||
percent(mem_available / mem_total),
|
||
kib_to_mib(mem_min_sigkill_kb),
|
||
percent(mem_min_sigkill_kb / mem_total),
|
||
kib_to_mib(swap_free),
|
||
percent(swap_free / (swap_total + 0.1)),
|
||
kib_to_mib(swap_min_sigkill_kb),
|
||
swap_sigkill_pc)
|
||
|
||
find_victim_and_send_signal(SIGKILL)
|
||
|
||
# ZRAM KILL
|
||
elif mem_used_zram >= zram_max_sigkill_kb:
|
||
time0 = time()
|
||
|
||
mem_info = '\n\033[4mMemory status that requires corrective actions:' \
|
||
'\033[0m\n MemUsedZram [{} MiB, {} %] >= zram_max_sig' \
|
||
'kill [{} MiB, {} %]'.format(
|
||
kib_to_mib(mem_used_zram),
|
||
percent(mem_used_zram / mem_total),
|
||
kib_to_mib(zram_max_sigkill_kb),
|
||
percent(zram_max_sigkill_kb / mem_total))
|
||
|
||
find_victim_and_send_signal(SIGKILL)
|
||
|
||
# MEM SWAP TERM
|
||
elif mem_available <= mem_min_sigterm_kb and \
|
||
swap_free <= swap_min_sigterm_kb:
|
||
|
||
time0 = time()
|
||
|
||
mem_info = '\n\033[4mMemory status that requires corrective actions:' \
|
||
'\033[0m\n MemAvailable [{} MiB, {} %] <= mem_min_sig' \
|
||
'term [{} MiB, {} %]\n SwapFree [{} MiB, {} %] <= swa' \
|
||
'p_min_sigterm [{} MiB, {} %]'.format(
|
||
kib_to_mib(mem_available),
|
||
percent(mem_available / mem_total),
|
||
kib_to_mib(mem_min_sigterm_kb),
|
||
#percent(mem_min_sigterm_kb / mem_total),
|
||
# ОКРУГЛЯТЬ НА МЕСТЕ ВЫШЕ
|
||
round(mem_min_sigterm_percent, 1),
|
||
kib_to_mib(swap_free),
|
||
percent(swap_free / (swap_total + 0.1)),
|
||
kib_to_mib(swap_min_sigterm_kb),
|
||
swap_sigterm_pc)
|
||
|
||
find_victim_and_send_signal(SIGTERM)
|
||
|
||
# ZRAM TERM
|
||
elif mem_used_zram >= zram_max_sigterm_kb:
|
||
time0 = time()
|
||
|
||
mem_info = '\n\033[4mMemory status that requires corrective actions:' \
|
||
'\033[0m\n MemUsedZram [{} MiB, {} %] >= ' \
|
||
'zram_max_sigterm [{} M, {} %]'.format(
|
||
kib_to_mib(mem_used_zram),
|
||
percent(mem_used_zram / mem_total),
|
||
kib_to_mib(zram_max_sigterm_kb),
|
||
percent(zram_max_sigterm_kb / mem_total))
|
||
|
||
find_victim_and_send_signal(SIGTERM)
|
||
|
||
# LOW MEMORY WARNINGS
|
||
elif gui_low_memory_warnings:
|
||
|
||
if mem_available <= mem_min_warnings_kb and \
|
||
swap_free <= swap_min_warnings_kb + 0.1 or \
|
||
mem_used_zram >= zram_max_warnings_kb:
|
||
warn_time_delta = time() - warn_time_now
|
||
warn_time_now = time()
|
||
warn_timer += warn_time_delta
|
||
if warn_timer > min_time_between_warnings:
|
||
send_notify_warn()
|
||
warn_timer = 0
|
||
|
||
sleep_after_check_mem()
|
||
|
||
# SLEEP BETWEEN MEM CHECKS
|
||
else:
|
||
sleep_after_check_mem()
|
||
|
||
|
||
|
||
|