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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2018-11-07 12:22:44 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2018-11-07 12:22:44 +0000 |
commit | 1e6c93250172946eeb38e94a92a1fd12c9d3011e (patch) | |
tree | 8ca5e16dfc7ad6b3bf2738ca0a48408a950f8f7e /python.d/cpuidle.chart.py | |
parent | Update watch file (diff) | |
download | netdata-1e6c93250172946eeb38e94a92a1fd12c9d3011e.tar.xz netdata-1e6c93250172946eeb38e94a92a1fd12c9d3011e.zip |
Merging upstream version 1.11.0+dfsg.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'python.d/cpuidle.chart.py')
-rw-r--r-- | python.d/cpuidle.chart.py | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/python.d/cpuidle.chart.py b/python.d/cpuidle.chart.py deleted file mode 100644 index d14c6aaf3..000000000 --- a/python.d/cpuidle.chart.py +++ /dev/null @@ -1,148 +0,0 @@ -# -*- coding: utf-8 -*- -# Description: cpuidle netdata python.d module -# Author: Steven Noonan (tycho) - -import glob -import os -import platform - -from bases.FrameworkServices.SimpleService import SimpleService - -import ctypes -syscall = ctypes.CDLL('libc.so.6').syscall - -# default module values (can be overridden per job in `config`) -# update_every = 2 - - -class Service(SimpleService): - def __init__(self, configuration=None, name=None): - prefix = os.getenv('NETDATA_HOST_PREFIX', "") - if prefix.endswith('/'): - prefix = prefix[:-1] - self.sys_dir = prefix + "/sys/devices/system/cpu" - self.schedstat_path = prefix + "/proc/schedstat" - SimpleService.__init__(self, configuration=configuration, name=name) - self.order = [] - self.definitions = {} - self.fake_name = 'cpu' - self.assignment = {} - self.last_schedstat = None - - @staticmethod - def __gettid(): - # This is horrendous. We need the *thread id* (not the *process id*), - # but there's no Python standard library way of doing that. If you need - # to enable this module on a non-x86 machine type, you'll have to find - # the Linux syscall number for gettid() and add it to the dictionary - # below. - syscalls = { - 'i386': 224, - 'x86_64': 186, - } - if platform.machine() not in syscalls: - return None - tid = syscall(syscalls[platform.machine()]) - return tid - - def __wake_cpus(self, cpus): - # Requires Python 3.3+. This will "tickle" each CPU to force it to - # update its idle counters. - if hasattr(os, 'sched_setaffinity'): - pid = self.__gettid() - save_affinity = os.sched_getaffinity(pid) - for idx in cpus: - os.sched_setaffinity(pid, [idx]) - os.sched_getaffinity(pid) - os.sched_setaffinity(pid, save_affinity) - - def __read_schedstat(self): - cpus = {} - for line in open(self.schedstat_path, 'r'): - if not line.startswith('cpu'): - continue - line = line.rstrip().split() - cpu = line[0] - active_time = line[7] - cpus[cpu] = int(active_time) // 1000 - return cpus - - def _get_data(self): - results = {} - - # Use the kernel scheduler stats to determine how much time was spent - # in C0 (active). - schedstat = self.__read_schedstat() - - # Determine if any of the CPUs are idle. If they are, then we need to - # tickle them in order to update their C-state residency statistics. - if self.last_schedstat is None: - needs_tickle = list(self.assignment.keys()) - else: - needs_tickle = [] - for cpu, active_time in self.last_schedstat.items(): - delta = schedstat[cpu] - active_time - if delta < 1: - needs_tickle.append(cpu) - - if needs_tickle: - # This line is critical for the stats to update. If we don't "tickle" - # idle CPUs, then the counters for those CPUs stop counting. - self.__wake_cpus([int(cpu[3:]) for cpu in needs_tickle]) - - # Re-read schedstat now that we've tickled any idlers. - schedstat = self.__read_schedstat() - - self.last_schedstat = schedstat - - for cpu, metrics in self.assignment.items(): - update_time = schedstat[cpu] - results[cpu + '_active_time'] = update_time - - for metric, path in metrics.items(): - residency = int(open(path, 'r').read()) - results[metric] = residency - - return results - - def check(self): - if self.__gettid() is None: - self.error("Cannot get thread ID. Stats would be completely broken.") - return False - - for path in sorted(glob.glob(self.sys_dir + '/cpu*/cpuidle/state*/name')): - # ['', 'sys', 'devices', 'system', 'cpu', 'cpu0', 'cpuidle', 'state3', 'name'] - path_elem = path.split('/') - cpu = path_elem[-4] - state = path_elem[-2] - statename = open(path, 'rt').read().rstrip() - - orderid = '%s_cpuidle' % (cpu,) - if orderid not in self.definitions: - self.order.append(orderid) - active_name = '%s_active_time' % (cpu,) - self.definitions[orderid] = { - 'options': [None, 'C-state residency', 'time%', 'cpuidle', 'cpuidle.cpuidle', 'stacked'], - 'lines': [ - [active_name, 'C0 (active)', 'percentage-of-incremental-row', 1, 1], - ], - } - self.assignment[cpu] = {} - - defid = '%s_%s_time' % (orderid, state) - - self.definitions[orderid]['lines'].append( - [defid, statename, 'percentage-of-incremental-row', 1, 1] - ) - - self.assignment[cpu][defid] = '/'.join(path_elem[:-1] + ['time']) - - # Sort order by kernel-specified CPU index - self.order.sort(key=lambda x: int(x.split('_')[0][3:])) - - if len(self.definitions) == 0: - self.error("couldn't find cstate stats") - return False - - return True - |