123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122 |
- # -*- coding: utf-8 -*-
- # Copyright 2015, 2016 OpenMarket Ltd
- #
- # Licensed under the Apache License, Version 2.0 (the "License");
- # you may not use this file except in compliance with the License.
- # You may obtain a copy of the License at
- #
- # http://www.apache.org/licenses/LICENSE-2.0
- #
- # Unless required by applicable law or agreed to in writing, software
- # distributed under the License is distributed on an "AS IS" BASIS,
- # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- # See the License for the specific language governing permissions and
- # limitations under the License.
- import os
- TICKS_PER_SEC = 100
- BYTES_PER_PAGE = 4096
- HAVE_PROC_STAT = os.path.exists("/proc/stat")
- HAVE_PROC_SELF_STAT = os.path.exists("/proc/self/stat")
- HAVE_PROC_SELF_LIMITS = os.path.exists("/proc/self/limits")
- HAVE_PROC_SELF_FD = os.path.exists("/proc/self/fd")
- # Field indexes from /proc/self/stat, taken from the proc(5) manpage
- STAT_FIELDS = {
- "utime": 14,
- "stime": 15,
- "starttime": 22,
- "vsize": 23,
- "rss": 24,
- }
- stats = {}
- # In order to report process_start_time_seconds we need to know the
- # machine's boot time, because the value in /proc/self/stat is relative to
- # this
- boot_time = None
- if HAVE_PROC_STAT:
- with open("/proc/stat") as _procstat:
- for line in _procstat:
- if line.startswith("btime "):
- boot_time = int(line.split()[1])
- def update_resource_metrics():
- if HAVE_PROC_SELF_STAT:
- global stats
- with open("/proc/self/stat") as s:
- line = s.read()
- # line is PID (command) more stats go here ...
- raw_stats = line.split(") ", 1)[1].split(" ")
- for (name, index) in STAT_FIELDS.iteritems():
- # subtract 3 from the index, because proc(5) is 1-based, and
- # we've lost the first two fields in PID and COMMAND above
- stats[name] = int(raw_stats[index - 3])
- def _count_fds():
- # Not every OS will have a /proc/self/fd directory
- if not HAVE_PROC_SELF_FD:
- return 0
- return len(os.listdir("/proc/self/fd"))
- def register_process_collector(process_metrics):
- process_metrics.register_collector(update_resource_metrics)
- if HAVE_PROC_SELF_STAT:
- process_metrics.register_callback(
- "cpu_user_seconds_total",
- lambda: float(stats["utime"]) / TICKS_PER_SEC
- )
- process_metrics.register_callback(
- "cpu_system_seconds_total",
- lambda: float(stats["stime"]) / TICKS_PER_SEC
- )
- process_metrics.register_callback(
- "cpu_seconds_total",
- lambda: (float(stats["utime"] + stats["stime"])) / TICKS_PER_SEC
- )
- process_metrics.register_callback(
- "virtual_memory_bytes",
- lambda: int(stats["vsize"])
- )
- process_metrics.register_callback(
- "resident_memory_bytes",
- lambda: int(stats["rss"]) * BYTES_PER_PAGE
- )
- process_metrics.register_callback(
- "start_time_seconds",
- lambda: boot_time + int(stats["starttime"]) / TICKS_PER_SEC
- )
- if HAVE_PROC_SELF_FD:
- process_metrics.register_callback(
- "open_fds",
- lambda: _count_fds()
- )
- if HAVE_PROC_SELF_LIMITS:
- def _get_max_fds():
- with open("/proc/self/limits") as limits:
- for line in limits:
- if not line.startswith("Max open files "):
- continue
- # Line is Max open files $SOFT $HARD
- return int(line.split()[3])
- return None
- process_metrics.register_callback(
- "max_fds",
- lambda: _get_max_fds()
- )
|