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annotate mercurial/profiling.py @ 43076:2372284d9457

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formatting: blacken the codebase This is using my patch to black (https://github.com/psf/black/pull/826) so we don't un-wrap collection literals. Done with: hg files 'set:**.py - mercurial/thirdparty/** - "contrib/python-zstandard/**"' | xargs black -S # skip-blame mass-reformatting only # no-check-commit reformats foo_bar functions Differential Revision: https://phab.mercurial-scm.org/D6971
author Augie Fackler <augie@google.com>
date Sun, 06 Oct 2019 09:45:02 -0400
parents 0ae593e791fb
children 687b865b95ad
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1 # profiling.py - profiling functions
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2 #
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3 # Copyright 2016 Gregory Szorc <gregory.szorc@gmail.com>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from __future__ import absolute_import, print_function
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9
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10 import contextlib
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11
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12 from .i18n import _
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13 from . import (
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14 encoding,
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15 error,
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16 extensions,
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17 pycompat,
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18 util,
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19 )
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20
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21
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22 def _loadprofiler(ui, profiler):
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23 """load profiler extension. return profile method, or None on failure"""
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24 extname = profiler
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25 extensions.loadall(ui, whitelist=[extname])
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26 try:
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27 mod = extensions.find(extname)
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28 except KeyError:
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29 return None
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30 else:
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31 return getattr(mod, 'profile', None)
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32
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33
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34 @contextlib.contextmanager
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35 def lsprofile(ui, fp):
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36 format = ui.config('profiling', 'format')
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37 field = ui.config('profiling', 'sort')
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38 limit = ui.configint('profiling', 'limit')
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39 climit = ui.configint('profiling', 'nested')
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40
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41 if format not in ['text', 'kcachegrind']:
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42 ui.warn(_("unrecognized profiling format '%s'" " - Ignored\n") % format)
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43 format = 'text'
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44
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45 try:
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46 from . import lsprof
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47 except ImportError:
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48 raise error.Abort(
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49 _(
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50 'lsprof not available - install from '
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51 'http://codespeak.net/svn/user/arigo/hack/misc/lsprof/'
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52 )
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53 )
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54 p = lsprof.Profiler()
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55 p.enable(subcalls=True)
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56 try:
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57 yield
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58 finally:
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59 p.disable()
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60
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61 if format == 'kcachegrind':
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62 from . import lsprofcalltree
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63
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64 calltree = lsprofcalltree.KCacheGrind(p)
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65 calltree.output(fp)
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66 else:
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67 # format == 'text'
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68 stats = lsprof.Stats(p.getstats())
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69 stats.sort(pycompat.sysstr(field))
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70 stats.pprint(limit=limit, file=fp, climit=climit)
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71
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72
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73 @contextlib.contextmanager
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74 def flameprofile(ui, fp):
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75 try:
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76 from flamegraph import flamegraph
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77 except ImportError:
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78 raise error.Abort(
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79 _(
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80 'flamegraph not available - install from '
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81 'https://github.com/evanhempel/python-flamegraph'
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82 )
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83 )
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84 # developer config: profiling.freq
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85 freq = ui.configint('profiling', 'freq')
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86 filter_ = None
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87 collapse_recursion = True
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88 thread = flamegraph.ProfileThread(
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89 fp, 1.0 / freq, filter_, collapse_recursion
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90 )
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91 start_time = util.timer()
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92 try:
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93 thread.start()
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94 yield
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95 finally:
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96 thread.stop()
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97 thread.join()
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98 print(
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99 'Collected %d stack frames (%d unique) in %2.2f seconds.'
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100 % (
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101 util.timer() - start_time,
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102 thread.num_frames(),
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103 thread.num_frames(unique=True),
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104 )
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105 )
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106
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107
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108 @contextlib.contextmanager
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109 def statprofile(ui, fp):
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110 from . import statprof
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111
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112 freq = ui.configint('profiling', 'freq')
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113 if freq > 0:
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114 # Cannot reset when profiler is already active. So silently no-op.
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115 if statprof.state.profile_level == 0:
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116 statprof.reset(freq)
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117 else:
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118 ui.warn(_("invalid sampling frequency '%s' - ignoring\n") % freq)
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119
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120 track = ui.config(
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121 'profiling', 'time-track', pycompat.iswindows and 'cpu' or 'real'
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122 )
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123 statprof.start(mechanism='thread', track=track)
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124
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125 try:
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126 yield
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127 finally:
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128 data = statprof.stop()
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129
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130 profformat = ui.config('profiling', 'statformat')
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131
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132 formats = {
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133 'byline': statprof.DisplayFormats.ByLine,
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134 'bymethod': statprof.DisplayFormats.ByMethod,
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135 'hotpath': statprof.DisplayFormats.Hotpath,
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136 'json': statprof.DisplayFormats.Json,
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137 'chrome': statprof.DisplayFormats.Chrome,
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138 }
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139
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140 if profformat in formats:
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141 displayformat = formats[profformat]
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142 else:
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143 ui.warn(_('unknown profiler output format: %s\n') % profformat)
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144 displayformat = statprof.DisplayFormats.Hotpath
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145
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146 kwargs = {}
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147
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148 def fraction(s):
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149 if isinstance(s, (float, int)):
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150 return float(s)
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151 if s.endswith('%'):
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152 v = float(s[:-1]) / 100
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153 else:
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154 v = float(s)
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155 if 0 <= v <= 1:
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156 return v
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157 raise ValueError(s)
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158
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159 if profformat == 'chrome':
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160 showmin = ui.configwith(fraction, 'profiling', 'showmin', 0.005)
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161 showmax = ui.configwith(fraction, 'profiling', 'showmax')
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162 kwargs.update(minthreshold=showmin, maxthreshold=showmax)
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163 elif profformat == 'hotpath':
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164 # inconsistent config: profiling.showmin
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165 limit = ui.configwith(fraction, 'profiling', 'showmin', 0.05)
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166 kwargs[r'limit'] = limit
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167 showtime = ui.configbool('profiling', 'showtime')
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168 kwargs[r'showtime'] = showtime
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169
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170 statprof.display(fp, data=data, format=displayformat, **kwargs)
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171
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172
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173 class profile(object):
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174 """Start profiling.
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175
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176 Profiling is active when the context manager is active. When the context
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177 manager exits, profiling results will be written to the configured output.
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178 """
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179
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180 def __init__(self, ui, enabled=True):
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181 self._ui = ui
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182 self._output = None
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183 self._fp = None
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184 self._fpdoclose = True
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185 self._profiler = None
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186 self._enabled = enabled
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187 self._entered = False
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188 self._started = False
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189
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190 def __enter__(self):
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191 self._entered = True
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192 if self._enabled:
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193 self.start()
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194 return self
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195
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196 def start(self):
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197 """Start profiling.
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198
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199 The profiling will stop at the context exit.
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200
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201 If the profiler was already started, this has no effect."""
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202 if not self._entered:
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203 raise error.ProgrammingError()
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204 if self._started:
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205 return
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206 self._started = True
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207 profiler = encoding.environ.get('HGPROF')
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208 proffn = None
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209 if profiler is None:
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210 profiler = self._ui.config('profiling', 'type')
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211 if profiler not in ('ls', 'stat', 'flame'):
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212 # try load profiler from extension with the same name
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213 proffn = _loadprofiler(self._ui, profiler)
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214 if proffn is None:
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215 self._ui.warn(
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216 _("unrecognized profiler '%s' - ignored\n") % profiler
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217 )
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218 profiler = 'stat'
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219
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220 self._output = self._ui.config('profiling', 'output')
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221
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222 try:
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223 if self._output == 'blackbox':
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224 self._fp = util.stringio()
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225 elif self._output:
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226 path = self._ui.expandpath(self._output)
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diff changeset
227 self._fp = open(path, 'wb')
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diff changeset
228 elif pycompat.iswindows:
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diff changeset
229 # parse escape sequence by win32print()
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diff changeset
230 class uifp(object):
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231 def __init__(self, ui):
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232 self._ui = ui
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diff changeset
233
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diff changeset
234 def write(self, data):
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diff changeset
235 self._ui.write_err(data)
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236
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diff changeset
237 def flush(self):
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238 self._ui.flush()
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239
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240 self._fpdoclose = False
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241 self._fp = uifp(self._ui)
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242 else:
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243 self._fpdoclose = False
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244 self._fp = self._ui.ferr
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245
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246 if proffn is not None:
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247 pass
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248 elif profiler == 'ls':
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249 proffn = lsprofile
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250 elif profiler == 'flame':
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251 proffn = flameprofile
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252 else:
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253 proffn = statprofile
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254
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255 self._profiler = proffn(self._ui, self._fp)
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256 self._profiler.__enter__()
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257 except: # re-raises
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258 self._closefp()
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259 raise
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260
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261 def __exit__(self, exception_type, exception_value, traceback):
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262 propagate = None
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diff changeset
263 if self._profiler is not None:
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264 propagate = self._profiler.__exit__(
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265 exception_type, exception_value, traceback
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266 )
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267 if self._output == 'blackbox':
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268 val = 'Profile:\n%s' % self._fp.getvalue()
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269 # ui.log treats the input as a format string,
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270 # so we need to escape any % signs.
062eb859d3ee profile: close 'fp' in all cases
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32808
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271 val = val.replace('%', '%%')
062eb859d3ee profile: close 'fp' in all cases
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32808
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272 self._ui.log('profile', val)
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3a4c677cbd6e profile: remove now useless indent
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32805
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273 self._closefp()
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6675d23da748 profile: properly propagate exception from the sub-context manager
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32809
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274 return propagate
32804
c0b2c8f25ad9 profiling: move 'fp' closing logic into its own function
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32788
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275
c0b2c8f25ad9 profiling: move 'fp' closing logic into its own function
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32788
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276 def _closefp(self):
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2b0fc56840d0 profile: use explicit logic to control file closing
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32804
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277 if self._fpdoclose and self._fp is not None:
2b0fc56840d0 profile: use explicit logic to control file closing
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32804
diff changeset
278 self._fp.close()