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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
##############################################################################
# Copyright (c) 2015 Ericsson AB and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
"""Processor statistics and system load."""
import logging
import time
import re
import yardstick.ssh as ssh
from yardstick.benchmark.scenarios import base
LOG = logging.getLogger(__name__)
class CPULoad(base.Scenario):
"""Collect processor statistics and system load.
This scenario reads system load averages and
CPU usage statistics on a Linux host.
CPU usage statistics are read using the utility 'mpstat'.
If 'mpstat' is not installed on the host usage statistics
are instead read directly from '/proc/stat'.
Load averages are read from the file '/proc/loadavg'
on the Linux host.
Parameters
interval - Time interval to measure CPU usage. A value of 0
indicates that processors statistics are to be
reported for the time since system startup (boot)
type: [int]
unit: seconds
default: 0
"""
__scenario_type__ = "CPUload"
MPSTAT_FIELD_SIZE = 10
def __init__(self, scenario_cfg, context_cfg):
"""Scenario construction."""
self.scenario_cfg = scenario_cfg
self.context_cfg = context_cfg
self.setup_done = False
self.has_mpstat = False
def setup(self):
"""Scenario setup."""
host = self.context_cfg['host']
user = host.get('user', 'ubuntu')
ip = host.get('ip', None)
key_filename = host.get('key_filename', '~/.ssh/id_rsa')
LOG.info("user:%s, host:%s", user, ip)
self.client = ssh.SSH(user, ip, key_filename=key_filename)
self.client.wait(timeout=600)
# Check if mpstat prog is installed
status, _, _ = self.client.execute("mpstat -V >/dev/null 2>&1")
if status != 0:
LOG.info("MPSTAT is NOT installed")
self.has_mpstat = False
else:
LOG.info("MPSTAT is installed")
self.has_mpstat = True
if 'options' in self.scenario_cfg:
self.interval = self.scenario_cfg['options'].get("interval", 0)
else:
self.interval = 0
self.setup_done = True
def _execute_command(self, cmd):
"""Execute a command on server."""
LOG.info("Executing: %s" % cmd)
status, stdout, stderr = self.client.execute(cmd)
if status != 0:
raise RuntimeError("Failed executing command: ",
cmd, stderr)
return stdout
def _get_loadavg(self):
"""Get system load."""
return {'loadavg': self._execute_command("cat /proc/loadavg").split()}
def _get_cpu_usage_mpstat(self):
"""Get processor usage using mpstat."""
if self.interval > 0:
cmd = "mpstat -P ON %s 1" % self.interval
else:
cmd = "mpstat -P ON"
result = self._execute_command(cmd)
fields = []
mpstat = {}
time_marker = re.compile("^([0-9]+):([0-9]+):([0-9]+)$")
ampm_marker = re.compile("(AM|PM)$")
# Parse CPU stats
for row in result.split('\n'):
line = row.split()
if line and re.match(time_marker, line[0]):
if re.match(ampm_marker, line[1]):
del line[:2]
else:
del line[:1]
if line[0] == 'CPU':
# header fields
fields = line[1:]
if len(fields) != CPULoad.MPSTAT_FIELD_SIZE:
raise RuntimeError("mpstat: unexpected field size",
fields)
else:
# value fields
cpu = 'cpu' if line[0] == 'all' else 'cpu' + line[0]
values = line[1:]
if values and len(values) == len(fields):
mpstat[cpu] = dict(zip(fields, values))
else:
raise RuntimeError("mpstat: parse error", fields, line)
return {'mpstat': mpstat}
def _get_cpu_usage(self):
"""Get processor usage from /proc/stat."""
fields = ['%usr', '%nice', '%sys', '%idle', '%iowait',
'%irq', '%soft', '%steal', '%guest', '%gnice']
cmd = "grep '^cpu[0-9 ].' /proc/stat"
if self.interval > 0:
previous = self._execute_command(cmd).splitlines()
time.sleep(self.interval)
current = self._execute_command(cmd).splitlines()
else:
current = self._execute_command(cmd).splitlines()
previous = current
mpstat = {}
for (prev, cur) in zip(previous, current):
# Split string to list tokens
cur_list = cur.split()
prev_list = prev.split()
cpu = cur_list[0]
cur_stats = map(int, cur_list[1:])
if self.interval > 0:
prev_stats = map(int, prev_list[1:])
else:
prev_stats = [0] * len(cur_stats)
# NB: Don't add 'guest' and 'gnice' as they
# are already included in 'usr' and 'nice'.
uptime_prev = sum(prev_stats[0:8])
uptime_cur = sum(cur_stats[0:8])
# Remove 'guest' and 'gnice' from 'usr' and 'nice'
prev_stats[0] -= prev_stats[8]
prev_stats[1] -= prev_stats[9]
cur_stats[0] -= cur_stats[8]
cur_stats[1] -= cur_stats[9]
# number of samples (jiffies) in the interval
samples = (uptime_cur - uptime_prev) or 1
def _percent(x, y):
if x < y:
return 0.0
else:
return "%.2f" % (100.0 * (x - y) / samples)
load = map(_percent, cur_stats, prev_stats)
mpstat[cpu] = dict(zip(fields, load))
return {'mpstat': mpstat}
def run(self, result):
"""Read processor statistics."""
if not self.setup_done:
self.setup()
result.update(self._get_loadavg())
if self.has_mpstat:
result.update(self._get_cpu_usage_mpstat())
else:
result.update(self._get_cpu_usage())
# Note: No SLA as this scenario is only collecting statistics
# def _test():
# """internal test function."""
# import pkg_resources
# key_filename = pkg_resources.resource_filename('yardstick.resources',
# 'files/yardstick_key')
# ctx = {
# 'host': {
# 'ip': '172.16.0.175',
# 'user': 'ec2-user',
# 'key_filename': key_filename
# }
# }
# logger = logging.getLogger('yardstick')
# logger.setLevel(logging.DEBUG)
# args = {}
# result = {}
# p = CPULoad(args, ctx)
# p.run(result)
# import json
# print json.dumps(result)
# if __name__ == '__main__':
# _test()
|
