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
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
|
#
# cyclictest.py - object to manage a cyclictest executable instance
#
# Copyright 2009 - 2012 Clark Williams <williams@redhat.com>
# Copyright 2012 David Sommerseth <davids@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# For the avoidance of doubt the "preferred form" of this code is one which
# is in an open unpatent encumbered format. Where cryptographic key signing
# forms part of the process of creating an executable the information
# including keys needed to generate an equivalently functional executable
# are deemed to be part of the source code.
#
import os, sys, subprocess, signal, libxml2, shutil, tempfile, time
from rteval.Log import Log
from rteval.modules import rtevalModulePrototype
class RunData(object):
'''class to keep instance data from a cyclictest run'''
def __init__(self, id, type, priority, logfnc):
self.id = id
self.type = type
self.priority = int(priority)
self.description = ''
# histogram of data
self.samples = {}
self.numsamples = 0
self.min = 100000000
self.max = 0
self.stddev = 0.0
self.mean = 0.0
self.mode = 0.0
self.median = 0.0
self.range = 0.0
self.mad = 0.0
self.variance = 0.0
self._log = logfnc
def sample(self, value):
self.samples[value] += self.samples.setdefault(value, 0) + 1
if value > self.max: self.max = value
if value < self.min: self.min = value
self.numsamples += 1
def bucket(self, index, value):
self.samples[index] = self.samples.setdefault(index, 0) + value
if value and index > self.max: self.max = index
if value and index < self.min: self.min = index
self.numsamples += value
def reduce(self):
import math
# check to see if we have any samples and if we
# only have 1 (or none) set the calculated values
# to zero and return
if self.numsamples <= 1:
self._log(Log.DEBUG, "skipping %s (%d samples)" % (self.id, self.numsamples))
self.variance = 0
self.mad = 0
self.stddev = 0
return
self._log(Log.INFO, "reducing %s" % self.id)
total = 0
keys = self.samples.keys()
keys.sort()
sorted = []
mid = self.numsamples / 2
# mean, mode, and median
occurances = 0
lastkey = -1
for i in keys:
if mid > total and mid <= (total + self.samples[i]):
if self.numsamples & 1 and mid == total+1:
self.median = (lastkey + i) / 2
else:
self.median = i
total += (i * self.samples[i])
if self.samples[i] > occurances:
occurances = self.samples[i]
self.mode = i
self.mean = float(total) / float(self.numsamples)
# range
for i in keys:
if self.samples[i]:
low = i
break
high = keys[-1]
while high and self.samples[high] == 0:
high -= 1
self.range = high - low
# Mean Absolute Deviation and Variance
madsum = 0
varsum = 0
for i in keys:
madsum += float(abs(float(i) - self.mean) * self.samples[i])
varsum += float(((float(i) - self.mean) ** 2) * self.samples[i])
self.mad = madsum / self.numsamples
self.variance = varsum / (self.numsamples - 1)
# standard deviation
self.stddev = math.sqrt(self.variance)
def MakeReport(self):
rep_n = libxml2.newNode(self.type)
if self.type == 'system':
rep_n.newProp('description', self.description)
else:
rep_n.newProp('id', str(self.id))
rep_n.newProp('priority', str(self.priority))
stat_n = rep_n.newChild(None, 'statistics', None)
stat_n.newTextChild(None, 'samples', str(self.numsamples))
if self.numsamples > 0:
n = stat_n.newTextChild(None, 'minimum', str(self.min))
n.newProp('unit', 'us')
n = stat_n.newTextChild(None, 'maximum', str(self.max))
n.newProp('unit', 'us')
n = stat_n.newTextChild(None, 'median', str(self.median))
n.newProp('unit', 'us')
n = stat_n.newTextChild(None, 'mode', str(self.mode))
n.newProp('unit', 'us')
n = stat_n.newTextChild(None, 'range', str(self.range))
n.newProp('unit', 'us')
n = stat_n.newTextChild(None, 'mean', str(self.mean))
n.newProp('unit', 'us')
n = stat_n.newTextChild(None, 'mean_absolute_deviation', str(self.mad))
n.newProp('unit', 'us')
n = stat_n.newTextChild(None, 'variance', str(self.variance))
n.newProp('unit', 'us')
n = stat_n.newTextChild(None, 'standard_deviation', str(self.stddev))
n.newProp('unit', 'us')
hist_n = rep_n.newChild(None, 'histogram', None)
hist_n.newProp('nbuckets', str(len(self.samples)))
keys = self.samples.keys()
keys.sort()
for k in keys:
b_n = hist_n.newChild(None, 'bucket', None)
b_n.newProp('index', str(k))
b_n.newProp('value', str(self.samples[k]))
return rep_n
class Cyclictest(rtevalModulePrototype):
def __init__(self, config, logger=None):
rtevalModulePrototype.__init__(self, 'measurement', 'cyclictest', logger)
self.__cfg = config
# Create a RunData object per CPU core
f = open('/proc/cpuinfo')
self.__numanodes = int(self.__cfg.setdefault('numanodes', 0))
self.__priority = int(self.__cfg.setdefault('priority', 95))
self.__buckets = int(self.__cfg.setdefault('buckets', 2000))
self.__numcores = 0
self.__cyclicdata = {}
for line in f:
if line.startswith('processor'):
core = line.split()[-1]
self.__cyclicdata[core] = RunData(core, 'core',self.__priority,
logfnc=self._log)
self.__numcores += 1
if line.startswith('model name'):
desc = line.split(': ')[-1][:-1]
self.__cyclicdata[core].description = ' '.join(desc.split())
f.close()
# Create a RunData object for the overall system
self.__cyclicdata['system'] = RunData('system', 'system', self.__priority,
logfnc=self._log)
self.__cyclicdata['system'].description = ("(%d cores) " % self.__numcores) + self.__cyclicdata['0'].description
self._log(Log.DEBUG, "system has %d cpu cores" % self.__numcores)
self.__started = False
self.__cyclicoutput = None
self.__breaktraceval = None
def __getmode(self):
if self.__numanodes > 1:
self._log(Log.DEBUG, "running in NUMA mode (%d nodes)" % self.__numanodes)
return '--numa'
self._log(Log.DEBUG, "running in SMP mode")
return '--smp'
def __get_debugfs_mount(self):
ret = None
mounts = open('/proc/mounts')
for l in mounts:
field = l.split()
if field[2] == "debugfs":
ret = field[1]
break
mounts.close()
return ret
def _WorkloadSetup(self):
self.__cyclicprocess = None
pass
def _WorkloadBuild(self):
self._setReady()
def _WorkloadPrepare(self):
self.__interval = self.__cfg.has_key('interval') and '-i%d' % int(self.__cfg.interval) or ""
self.__cmd = ['cyclictest',
self.__interval,
'-qmu',
'-h %d' % self.__buckets,
"-p%d" % int(self.__priority),
self.__getmode(),
]
if self.__cfg.has_key('threads') and self.__cfg.threads:
self.__cmd.append("-t%d" % int(self.__cfg.threads))
if self.__cfg.has_key('breaktrace') and self.__cfg.breaktrace:
self.__cmd.append("-b%d" % int(self.__cfg.breaktrace))
# Buffer for cyclictest data written to stdout
self.__cyclicoutput = tempfile.SpooledTemporaryFile(mode='rw+b')
def _WorkloadTask(self):
if self.__started:
# Don't restart cyclictest if it is already runing
return
self._log(Log.DEBUG, "starting with cmd: %s" % " ".join(self.__cmd))
self.__nullfp = os.open('/dev/null', os.O_RDWR)
debugdir = self.__get_debugfs_mount()
if self.__cfg.has_key('breaktrace') and self.__cfg.breaktrace and debugdir:
# Ensure that the trace log is clean
trace = os.path.join(debugdir, 'tracing', 'trace')
fp = open(os.path.join(trace), "w")
fp.write("0")
fp.flush()
fp.close()
self.__cyclicoutput.seek(0)
self.__cyclicprocess = subprocess.Popen(self.__cmd,
stdout=self.__cyclicoutput,
stderr=self.__nullfp,
stdin=self.__nullfp)
self.__started = True
def WorkloadAlive(self):
if self.__started:
return self.__cyclicprocess.poll() is None
else:
return False
def _WorkloadCleanup(self):
while self.__cyclicprocess.poll() == None:
self._log(Log.DEBUG, "Sending SIGINT")
os.kill(self.__cyclicprocess.pid, signal.SIGINT)
time.sleep(2)
# now parse the histogram output
self.__cyclicoutput.seek(0)
for line in self.__cyclicoutput:
if line.startswith('#'):
# Catch if cyclictest stopped due to a breaktrace
if line.startswith('# Break value: '):
self.__breaktraceval = int(line.split(':')[1])
continue
vals = line.split()
index = int(vals[0])
for i in range(0, len(self.__cyclicdata)-1):
if str(i) not in self.__cyclicdata: continue
self.__cyclicdata[str(i)].bucket(index, int(vals[i+1]))
self.__cyclicdata['system'].bucket(index, int(vals[i+1]))
for n in self.__cyclicdata.keys():
self.__cyclicdata[n].reduce()
# If the breaktrace feature of cyclictest was enabled and triggered,
# put the trace into the log directory
debugdir = self.__get_debugfs_mount()
if self.__breaktraceval and debugdir:
trace = os.path.join(debugdir, 'tracing', 'trace')
cyclicdir = os.path.join(self.__cfg.reportdir, 'cyclictest')
os.mkdir(cyclicdir)
shutil.copyfile(trace, os.path.join(cyclicdir, 'breaktrace.log'))
self._setFinished()
self.__started = False
os.close(self.__nullfp)
del self.__nullfp
def MakeReport(self):
rep_n = libxml2.newNode('cyclictest')
rep_n.newProp('command_line', ' '.join(self.__cmd))
# If it was detected cyclictest was aborted somehow,
# report the reason
abrt_n = libxml2.newNode('abort_report')
abrt = False
if self.__breaktraceval:
abrt_n.newProp('reason', 'breaktrace')
btv_n = abrt_n.newChild(None, 'breaktrace', None)
btv_n.newProp('latency_threshold', str(self.__cfg.breaktrace))
btv_n.newProp('measured_latency', str(self.__breaktraceval))
abrt = True
# Only add the <abort_report/> node if an abortion happened
if abrt:
rep_n.addChild(abrt_n)
rep_n.addChild(self.__cyclicdata["system"].MakeReport())
for thr in range(0, self.__numcores):
if str(thr) not in self.__cyclicdata:
continue
rep_n.addChild(self.__cyclicdata[str(thr)].MakeReport())
return rep_n
def ModuleInfo():
return {"parallel": True,
"loads": True}
def ModuleParameters():
return {"interval": {"descr": "Base interval of the threads in microseconds",
"default": 100,
"metavar": "INTV_US"},
"buckets": {"descr": "Histogram width",
"default": 2000,
"metavar": "NUM"},
"priority": {"descr": "Run cyclictest with the given priority",
"default": 95,
"metavar": "PRIO"},
"breaktrace": {"descr": "Send a break trace command when latency > USEC",
"default": None,
"metavar": "USEC"}
}
def create(params, logger):
return Cyclictest(params, logger)
if __name__ == '__main__':
from rteval.rtevalConfig import rtevalConfig
l = Log()
l.SetLogVerbosity(Log.INFO|Log.DEBUG|Log.ERR|Log.WARN)
cfg = rtevalConfig({}, logger=l)
prms = {}
modprms = ModuleParameters()
for c, p in modprms.items():
prms[c] = p['default']
cfg.AppendConfig('cyclictest', prms)
cfg_ct = cfg.GetSection('cyclictest')
cfg_ct.reportdir = "."
cfg_ct.buckets = 200
# cfg_ct.breaktrace = 30
runtime = 10
c = Cyclictest(cfg_ct, l)
c._WorkloadSetup()
c._WorkloadPrepare()
c._WorkloadTask()
print "Running for %i seconds" % runtime
time.sleep(runtime)
c._WorkloadCleanup()
rep_n = c.MakeReport()
xml = libxml2.newDoc('1.0')
xml.setRootElement(rep_n)
xml.saveFormatFileEnc('-','UTF-8',1)
|