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# 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
__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.
: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.
"""
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()
self.p.enable(subcalls=True)
threading.setprofile(self._thread_profile)
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.
"""
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)
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()
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