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
|
# this is copied from the lsprof distro because somehow
# it is not installed by distutils
# I made one modification to profile so that it returns a pair
# instead of just the Stats object
import cPickle
import os
import sys
import thread
import threading
from _lsprof import Profiler, profiler_entry
from bzrlib import errors
__all__ = ['profile', 'Stats']
def profile(f, *args, **kwds):
"""Run a function profile.
Exceptions are not caught: If you need stats even when exceptions are to be
raised, pass in a closure that will catch the exceptions and transform them
appropriately for your driver function.
Important caveat: only one profile can execute at a time. See BzrProfiler
for details.
:return: The functions return value and a stats object.
"""
profiler = BzrProfiler()
profiler.start()
try:
ret = f(*args, **kwds)
finally:
stats = profiler.stop()
return ret, stats
class BzrProfiler(object):
"""Bzr utility wrapper around Profiler.
For most uses the module level 'profile()' function will be suitable.
However profiling when a simple wrapped function isn't available may
be easier to accomplish using this class.
To use it, create a BzrProfiler and call start() on it. Some arbitrary
time later call stop() to stop profiling and retrieve the statistics
from the code executed in the interim.
Note that profiling involves a threading.Lock around the actual profiling.
This is needed because profiling involves global manipulation of the python
interpreter state. As such you cannot perform multiple profiles at once.
Trying to do so will lock out the second profiler unless the global
bzrlib.lsprof.BzrProfiler.profiler_block is set to 0. Setting it to 0 will
cause profiling to fail rather than blocking.
"""
profiler_block = 1
"""Serialise rather than failing to profile concurrent profile requests."""
profiler_lock = threading.Lock()
"""Global lock used to serialise profiles."""
def start(self):
"""Start profiling.
This hooks into threading and will record all calls made until
stop() is called.
"""
self._g_threadmap = {}
self.p = Profiler()
permitted = self.__class__.profiler_lock.acquire(
self.__class__.profiler_block)
if not permitted:
raise errors.InternalBzrError(msg="Already profiling something")
try:
self.p.enable(subcalls=True)
threading.setprofile(self._thread_profile)
except:
self.__class__.profiler_lock.release()
raise
def stop(self):
"""Stop profiling.
This unhooks from threading and cleans up the profiler, returning
the gathered Stats object.
:return: A bzrlib.lsprof.Stats object.
"""
try:
self.p.disable()
for pp in self._g_threadmap.values():
pp.disable()
threading.setprofile(None)
p = self.p
self.p = None
threads = {}
for tid, pp in self._g_threadmap.items():
threads[tid] = Stats(pp.getstats(), {})
self._g_threadmap = None
return Stats(p.getstats(), threads)
finally:
self.__class__.profiler_lock.release()
def _thread_profile(self, f, *args, **kwds):
# we lose the first profile point for a new thread in order to
# trampoline a new Profile object into place
thr = thread.get_ident()
self._g_threadmap[thr] = p = Profiler()
# this overrides our sys.setprofile hook:
p.enable(subcalls=True, builtins=True)
class Stats(object):
"""XXX docstring"""
def __init__(self, data, threads):
self.data = data
self.threads = threads
def sort(self, crit="inlinetime"):
"""XXX docstring"""
if crit not in profiler_entry.__dict__:
raise ValueError, "Can't sort by %s" % crit
self.data.sort(lambda b, a: cmp(getattr(a, crit),
getattr(b, crit)))
for e in self.data:
if e.calls:
e.calls.sort(lambda b, a: cmp(getattr(a, crit),
getattr(b, crit)))
def pprint(self, top=None, file=None):
"""XXX docstring"""
if file is None:
file = sys.stdout
d = self.data
if top is not None:
d = d[:top]
cols = "% 12s %12s %11.4f %11.4f %s\n"
hcols = "% 12s %12s %12s %12s %s\n"
cols2 = "+%12s %12s %11.4f %11.4f + %s\n"
file.write(hcols % ("CallCount", "Recursive", "Total(ms)",
"Inline(ms)", "module:lineno(function)"))
for e in d:
file.write(cols % (e.callcount, e.reccallcount, e.totaltime,
e.inlinetime, label(e.code)))
if e.calls:
for se in e.calls:
file.write(cols % ("+%s" % se.callcount, se.reccallcount,
se.totaltime, se.inlinetime,
"+%s" % label(se.code)))
def freeze(self):
"""Replace all references to code objects with string
descriptions; this makes it possible to pickle the instance."""
# this code is probably rather ickier than it needs to be!
for i in range(len(self.data)):
e = self.data[i]
if not isinstance(e.code, str):
self.data[i] = type(e)((label(e.code),) + e[1:])
if e.calls:
for j in range(len(e.calls)):
se = e.calls[j]
if not isinstance(se.code, str):
e.calls[j] = type(se)((label(se.code),) + se[1:])
for s in self.threads.values():
s.freeze()
def calltree(self, file):
"""Output profiling data in calltree format (for KCacheGrind)."""
_CallTreeFilter(self.data).output(file)
def save(self, filename, format=None):
"""Save profiling data to a file.
:param filename: the name of the output file
:param format: 'txt' for a text representation;
'callgrind' for calltree format;
otherwise a pickled Python object. A format of None indicates
that the format to use is to be found from the filename. If
the name starts with callgrind.out, callgrind format is used
otherwise the format is given by the filename extension.
"""
if format is None:
basename = os.path.basename(filename)
if basename.startswith('callgrind.out'):
format = "callgrind"
else:
ext = os.path.splitext(filename)[1]
if len(ext) > 1:
format = ext[1:]
outfile = open(filename, 'wb')
try:
if format == "callgrind":
self.calltree(outfile)
elif format == "txt":
self.pprint(file=outfile)
else:
self.freeze()
cPickle.dump(self, outfile, 2)
finally:
outfile.close()
class _CallTreeFilter(object):
"""Converter of a Stats object to input suitable for KCacheGrind.
This code is taken from http://ddaa.net/blog/python/lsprof-calltree
with the changes made by J.P. Calderone and Itamar applied. Note that
isinstance(code, str) needs to be used at times to determine if the code
object is actually an external code object (with a filename, etc.) or
a Python built-in.
"""
def __init__(self, data):
self.data = data
self.out_file = None
def output(self, out_file):
self.out_file = out_file
out_file.write('events: Ticks\n')
self._print_summary()
for entry in self.data:
self._entry(entry)
def _print_summary(self):
max_cost = 0
for entry in self.data:
totaltime = int(entry.totaltime * 1000)
max_cost = max(max_cost, totaltime)
self.out_file.write('summary: %d\n' % (max_cost,))
def _entry(self, entry):
out_file = self.out_file
code = entry.code
inlinetime = int(entry.inlinetime * 1000)
#out_file.write('ob=%s\n' % (code.co_filename,))
if isinstance(code, str):
out_file.write('fi=~\n')
else:
out_file.write('fi=%s\n' % (code.co_filename,))
out_file.write('fn=%s\n' % (label(code, True),))
if isinstance(code, str):
out_file.write('0 %s\n' % (inlinetime,))
else:
out_file.write('%d %d\n' % (code.co_firstlineno, inlinetime))
# recursive calls are counted in entry.calls
if entry.calls:
calls = entry.calls
else:
calls = []
if isinstance(code, str):
lineno = 0
else:
lineno = code.co_firstlineno
for subentry in calls:
self._subentry(lineno, subentry)
out_file.write('\n')
def _subentry(self, lineno, subentry):
out_file = self.out_file
code = subentry.code
totaltime = int(subentry.totaltime * 1000)
#out_file.write('cob=%s\n' % (code.co_filename,))
out_file.write('cfn=%s\n' % (label(code, True),))
if isinstance(code, str):
out_file.write('cfi=~\n')
out_file.write('calls=%d 0\n' % (subentry.callcount,))
else:
out_file.write('cfi=%s\n' % (code.co_filename,))
out_file.write('calls=%d %d\n' % (
subentry.callcount, code.co_firstlineno))
out_file.write('%d %d\n' % (lineno, totaltime))
_fn2mod = {}
def label(code, calltree=False):
if isinstance(code, str):
return code
try:
mname = _fn2mod[code.co_filename]
except KeyError:
for k, v in sys.modules.items():
if v is None:
continue
if getattr(v, '__file__', None) is None:
continue
if not isinstance(v.__file__, str):
continue
if v.__file__.startswith(code.co_filename):
mname = _fn2mod[code.co_filename] = k
break
else:
mname = _fn2mod[code.co_filename] = '<%s>'%code.co_filename
if calltree:
return '%s %s:%d' % (code.co_name, mname, code.co_firstlineno)
else:
return '%s:%d(%s)' % (mname, code.co_firstlineno, code.co_name)
if __name__ == '__main__':
import os
sys.argv = sys.argv[1:]
if not sys.argv:
sys.stderr.write("usage: lsprof.py <script> <arguments...>\n")
sys.exit(2)
sys.path.insert(0, os.path.abspath(os.path.dirname(sys.argv[0])))
stats = profile(execfile, sys.argv[0], globals(), locals())
stats.sort()
stats.pprint()
|