1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
# -*- 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.
# Because otherwise 'resource' collides with synapse.metrics.resource
from __future__ import absolute_import
import os
import stat
from resource import getrusage, RUSAGE_SELF
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")
TYPES = {
stat.S_IFSOCK: "SOCK",
stat.S_IFLNK: "LNK",
stat.S_IFREG: "REG",
stat.S_IFBLK: "BLK",
stat.S_IFDIR: "DIR",
stat.S_IFCHR: "CHR",
stat.S_IFIFO: "FIFO",
}
# Field indexes from /proc/self/stat, taken from the proc(5) manpage
STAT_FIELDS = {
"utime": 14,
"stime": 15,
"starttime": 22,
"vsize": 23,
"rss": 24,
}
rusage = None
stats = {}
fd_counts = None
# 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():
global rusage
rusage = getrusage(RUSAGE_SELF)
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])
global fd_counts
fd_counts = _process_fds()
def _process_fds():
counts = {(k,): 0 for k in TYPES.values()}
counts[("other",)] = 0
# Not every OS will have a /proc/self/fd directory
if not HAVE_PROC_SELF_FD:
return counts
for fd in os.listdir("/proc/self/fd"):
try:
s = os.stat("/proc/self/fd/%s" % (fd))
fmt = stat.S_IFMT(s.st_mode)
if fmt in TYPES:
t = TYPES[fmt]
else:
t = "other"
counts[(t,)] += 1
except OSError:
# the dirh itself used by listdir() is usually missing by now
pass
return counts
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: sum(fd_counts.values())
)
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()
)
|
