13
11
from _lsprof import Profiler, profiler_entry
15
from bzrlib import errors
17
13
__all__ = ['profile', 'Stats']
18
def _thread_profile(f, *args, **kwds):
19
# we lose the first profile point for a new thread in order to trampoline
20
# a new Profile object into place
22
thr = thread.get_ident()
23
_g_threadmap[thr] = p = Profiler()
24
# this overrides our sys.setprofile hook:
25
p.enable(subcalls=True, builtins=True)
19
28
def profile(f, *args, **kwds):
20
"""Run a function profile.
22
Exceptions are not caught: If you need stats even when exceptions are to be
23
raised, pass in a closure that will catch the exceptions and transform them
24
appropriately for your driver function.
26
Important caveat: only one profile can execute at a time. See BzrProfiler
29
:return: The functions return value and a stats object.
31
profiler = BzrProfiler()
32
p.enable(subcalls=True)
33
threading.setprofile(_thread_profile)
34
35
ret = f(*args, **kwds)
36
stats = profiler.stop()
40
class BzrProfiler(object):
41
"""Bzr utility wrapper around Profiler.
38
for pp in _g_threadmap.values():
40
threading.setprofile(None)
43
For most uses the module level 'profile()' function will be suitable.
44
However profiling when a simple wrapped function isn't available may
45
be easier to accomplish using this class.
47
To use it, create a BzrProfiler and call start() on it. Some arbitrary
48
time later call stop() to stop profiling and retrieve the statistics
49
from the code executed in the interim.
51
Note that profiling involves a threading.Lock around the actual profiling.
52
This is needed because profiling involves global manipulation of the python
53
interpreter state. As such you cannot perform multiple profiles at once.
54
Trying to do so will lock out the second profiler unless the global
55
bzrlib.lsprof.BzrProfiler.profiler_block is set to 0. Setting it to 0 will
56
cause profiling to fail rather than blocking.
60
"""Serialise rather than failing to profile concurrent profile requests."""
62
profiler_lock = threading.Lock()
63
"""Global lock used to serialise profiles."""
68
This hooks into threading and will record all calls made until
71
self._g_threadmap = {}
73
permitted = self.__class__.profiler_lock.acquire(
74
self.__class__.profiler_block)
76
raise errors.InternalBzrError(msg="Already profiling something")
78
self.p.enable(subcalls=True)
79
threading.setprofile(self._thread_profile)
81
self.__class__.profiler_lock.release()
87
This unhooks from threading and cleans up the profiler, returning
88
the gathered Stats object.
90
:return: A bzrlib.lsprof.Stats object.
94
for pp in self._g_threadmap.values():
96
threading.setprofile(None)
100
for tid, pp in self._g_threadmap.items():
101
threads[tid] = Stats(pp.getstats(), {})
102
self._g_threadmap = None
103
return Stats(p.getstats(), threads)
105
self.__class__.profiler_lock.release()
107
def _thread_profile(self, f, *args, **kwds):
108
# we lose the first profile point for a new thread in order to
109
# trampoline a new Profile object into place
110
thr = thread.get_ident()
111
self._g_threadmap[thr] = p = Profiler()
112
# this overrides our sys.setprofile hook:
113
p.enable(subcalls=True, builtins=True)
43
for tid, pp in _g_threadmap.items():
44
threads[tid] = Stats(pp.getstats(), {})
46
return ret, Stats(p.getstats(), threads)
116
49
class Stats(object):
117
"""Wrapper around the collected data.
119
A Stats instance is created when the profiler finishes. Normal
120
usage is to use save() to write out the data to a file, or pprint()
121
to write human-readable information to the command line.
124
52
def __init__(self, data, threads):
126
54
self.threads = threads
128
56
def sort(self, crit="inlinetime"):
129
"""Sort the data by the supplied critera.
131
:param crit: the data attribute used as the sort key."""
132
58
if crit not in profiler_entry.__dict__:
133
59
raise ValueError, "Can't sort by %s" % crit
134
60
self.data.sort(lambda b, a: cmp(getattr(a, crit),
192
113
:param format: 'txt' for a text representation;
193
114
'callgrind' for calltree format;
194
115
otherwise a pickled Python object. A format of None indicates
195
that the format to use is to be found from the filename. If
196
the name starts with callgrind.out, callgrind format is used
197
otherwise the format is given by the filename extension.
116
that the format to use is to be found from the extension of
199
119
if format is None:
200
basename = os.path.basename(filename)
201
if basename.startswith('callgrind.out'):
204
ext = os.path.splitext(filename)[1]
120
ext = os.path.splitext(filename)[1]
207
123
outfile = open(filename, 'wb')
209
125
if format == "callgrind":
243
159
for entry in self.data:
244
160
totaltime = int(entry.totaltime * 1000)
245
161
max_cost = max(max_cost, totaltime)
246
self.out_file.write('summary: %d\n' % (max_cost,))
162
print >> self.out_file, 'summary: %d' % (max_cost,)
248
164
def _entry(self, entry):
249
165
out_file = self.out_file
250
166
code = entry.code
251
167
inlinetime = int(entry.inlinetime * 1000)
252
#out_file.write('ob=%s\n' % (code.co_filename,))
253
if isinstance(code, str):
254
out_file.write('fi=~\n')
256
out_file.write('fi=%s\n' % (code.co_filename,))
257
out_file.write('fn=%s\n' % (label(code, True),))
258
if isinstance(code, str):
259
out_file.write('0 %s\n' % (inlinetime,))
261
out_file.write('%d %d\n' % (code.co_firstlineno, inlinetime))
168
#print >> out_file, 'ob=%s' % (code.co_filename,)
169
if isinstance(code, str):
170
print >> out_file, 'fi=~'
172
print >> out_file, 'fi=%s' % (code.co_filename,)
173
print >> out_file, 'fn=%s' % (label(code, True),)
174
if isinstance(code, str):
175
print >> out_file, '0 ', inlinetime
177
print >> out_file, '%d %d' % (code.co_firstlineno, inlinetime)
262
178
# recursive calls are counted in entry.calls
264
180
calls = entry.calls
270
186
lineno = code.co_firstlineno
271
187
for subentry in calls:
272
188
self._subentry(lineno, subentry)
275
191
def _subentry(self, lineno, subentry):
276
192
out_file = self.out_file
277
193
code = subentry.code
278
194
totaltime = int(subentry.totaltime * 1000)
279
#out_file.write('cob=%s\n' % (code.co_filename,))
195
#print >> out_file, 'cob=%s' % (code.co_filename,)
196
print >> out_file, 'cfn=%s' % (label(code, True),)
280
197
if isinstance(code, str):
281
out_file.write('cfi=~\n')
282
out_file.write('cfn=%s\n' % (label(code, True),))
283
out_file.write('calls=%d 0\n' % (subentry.callcount,))
198
print >> out_file, 'cfi=~'
199
print >> out_file, 'calls=%d 0' % (subentry.callcount,)
285
out_file.write('cfi=%s\n' % (code.co_filename,))
286
out_file.write('cfn=%s\n' % (label(code, True),))
287
out_file.write('calls=%d %d\n' % (
288
subentry.callcount, code.co_firstlineno))
289
out_file.write('%d %d\n' % (lineno, totaltime))
201
print >> out_file, 'cfi=%s' % (code.co_filename,)
202
print >> out_file, 'calls=%d %d' % (
203
subentry.callcount, code.co_firstlineno)
204
print >> out_file, '%d %d' % (lineno, totaltime)