New upstream version 1.11.0+dfsgupstream/1.11.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 212 insertions, 0 deletions

diff --git a/collectors/python.d.plugin/cpuidle/Makefile.inc b/collectors/python.d.plugin/cpuidle/Makefile.inc
new file mode 100644
index 000000000..66c47d3cf
--- /dev/null
+++ b/collectors/python.d.plugin/cpuidle/Makefile.inc
@@ -0,0 +1,13 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# THIS IS NOT A COMPLETE Makefile
+# IT IS INCLUDED BY ITS PARENT'S Makefile.am
+# IT IS REQUIRED TO REFERENCE ALL FILES RELATIVE TO THE PARENT
+
+# install these files
+dist_python_DATA       += cpuidle/cpuidle.chart.py
+dist_pythonconfig_DATA += cpuidle/cpuidle.conf
+
+# do not install these files, but include them in the distribution
+dist_noinst_DATA       += cpuidle/README.md cpuidle/Makefile.inc
+
diff --git a/collectors/python.d.plugin/cpuidle/README.md b/collectors/python.d.plugin/cpuidle/README.md
new file mode 100644
index 000000000..495169638
--- /dev/null
+++ b/collectors/python.d.plugin/cpuidle/README.md
@@ -0,0 +1,11 @@
+# cpuidle
+
+This module monitors the usage of CPU idle states.
+
+**Requirement:**
+Your kernel needs to have `CONFIG_CPU_IDLE` enabled.
+
+It produces one stacked chart per CPU, showing the percentage of time spent in
+each state.
+
+---
diff --git a/collectors/python.d.plugin/cpuidle/cpuidle.chart.py b/collectors/python.d.plugin/cpuidle/cpuidle.chart.py
new file mode 100644
index 000000000..feac025bf
--- /dev/null
+++ b/collectors/python.d.plugin/cpuidle/cpuidle.chart.py
@@ -0,0 +1,148 @@
+# -*- coding: utf-8 -*-
+# Description: cpuidle netdata python.d module
+# Author: Steven Noonan (tycho)
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+import ctypes
+import glob
+import os
+import platform
+
+from bases.FrameworkServices.SimpleService import SimpleService
+
+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 not self.definitions:
+            self.error("couldn't find cstate stats")
+            return False
+
+        return True
diff --git a/collectors/python.d.plugin/cpuidle/cpuidle.conf b/collectors/python.d.plugin/cpuidle/cpuidle.conf
new file mode 100644
index 000000000..bc276fcd2
--- /dev/null
+++ b/collectors/python.d.plugin/cpuidle/cpuidle.conf
@@ -0,0 +1,40 @@
+# netdata python.d.plugin configuration for cpuidle
+#
+# This file is in YaML format. Generally the format is:
+#
+# name: value
+#
+# There are 2 sections:
+#  - global variables
+#  - one or more JOBS
+#
+# JOBS allow you to collect values from multiple sources.
+# Each source will have its own set of charts.
+#
+# JOB parameters have to be indented (using spaces only, example below).
+
+# ----------------------------------------------------------------------
+# Global Variables
+# These variables set the defaults for all JOBs, however each JOB
+# may define its own, overriding the defaults.
+
+# update_every sets the default data collection frequency.
+# If unset, the python.d.plugin default is used.
+# update_every: 1
+
+# priority controls the order of charts at the netdata dashboard.
+# Lower numbers move the charts towards the top of the page.
+# If unset, the default for python.d.plugin is used.
+# priority: 60000
+
+# retries sets the number of retries to be made in case of failures.
+# If unset, the default for python.d.plugin is used.
+# Attempts to restore the service are made once every update_every
+# and only if the module has collected values in the past.
+# retries: 60
+
+# autodetection_retry sets the job re-check interval in seconds.
+# The job is not deleted if check fails.
+# Attempts to start the job are made once every autodetection_retry.
+# This feature is disabled by default.
+# autodetection_retry: 0