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annotate mercurial/profiling.py @ 43089:c59eb1560c44

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py3: manually import getattr where it is needed The march continues. Differential Revision: https://phab.mercurial-scm.org/D7009
author Gregory Szorc <gregory.szorc@gmail.com>
date Sun, 06 Oct 2019 16:55:18 -0400
parents eef9a2d67051
children 8ff1ecfadcd1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 .pycompat import (
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14 getattr,
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15 open,
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16 )
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17 from . import (
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18 encoding,
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19 error,
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20 extensions,
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21 pycompat,
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22 util,
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23 )
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24
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25
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26 def _loadprofiler(ui, profiler):
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27 """load profiler extension. return profile method, or None on failure"""
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28 extname = profiler
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29 extensions.loadall(ui, whitelist=[extname])
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30 try:
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31 mod = extensions.find(extname)
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32 except KeyError:
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33 return None
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34 else:
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35 return getattr(mod, 'profile', None)
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36
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37
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38 @contextlib.contextmanager
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39 def lsprofile(ui, fp):
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40 format = ui.config(b'profiling', b'format')
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41 field = ui.config(b'profiling', b'sort')
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42 limit = ui.configint(b'profiling', b'limit')
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43 climit = ui.configint(b'profiling', b'nested')
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44
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45 if format not in [b'text', b'kcachegrind']:
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46 ui.warn(
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47 _(b"unrecognized profiling format '%s'" b" - Ignored\n") % format
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48 )
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49 format = b'text'
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50
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51 try:
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52 from . import lsprof
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53 except ImportError:
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54 raise error.Abort(
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55 _(
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56 b'lsprof not available - install from '
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57 b'http://codespeak.net/svn/user/arigo/hack/misc/lsprof/'
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58 )
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59 )
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60 p = lsprof.Profiler()
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61 p.enable(subcalls=True)
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62 try:
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63 yield
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64 finally:
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65 p.disable()
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66
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67 if format == b'kcachegrind':
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68 from . import lsprofcalltree
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69
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70 calltree = lsprofcalltree.KCacheGrind(p)
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71 calltree.output(fp)
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72 else:
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73 # format == 'text'
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74 stats = lsprof.Stats(p.getstats())
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75 stats.sort(pycompat.sysstr(field))
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76 stats.pprint(limit=limit, file=fp, climit=climit)
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77
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78
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79 @contextlib.contextmanager
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80 def flameprofile(ui, fp):
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81 try:
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82 from flamegraph import flamegraph
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83 except ImportError:
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84 raise error.Abort(
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85 _(
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86 b'flamegraph not available - install from '
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87 b'https://github.com/evanhempel/python-flamegraph'
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88 )
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89 )
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90 # developer config: profiling.freq
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91 freq = ui.configint(b'profiling', b'freq')
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92 filter_ = None
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93 collapse_recursion = True
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94 thread = flamegraph.ProfileThread(
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95 fp, 1.0 / freq, filter_, collapse_recursion
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96 )
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97 start_time = util.timer()
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98 try:
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99 thread.start()
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100 yield
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101 finally:
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102 thread.stop()
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103 thread.join()
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104 print(
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105 b'Collected %d stack frames (%d unique) in %2.2f seconds.'
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106 % (
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107 util.timer() - start_time,
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108 thread.num_frames(),
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109 thread.num_frames(unique=True),
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110 )
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111 )
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112
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113
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114 @contextlib.contextmanager
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115 def statprofile(ui, fp):
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116 from . import statprof
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117
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118 freq = ui.configint(b'profiling', b'freq')
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119 if freq > 0:
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120 # Cannot reset when profiler is already active. So silently no-op.
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121 if statprof.state.profile_level == 0:
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122 statprof.reset(freq)
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123 else:
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124 ui.warn(_(b"invalid sampling frequency '%s' - ignoring\n") % freq)
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125
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126 track = ui.config(
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127 b'profiling', b'time-track', pycompat.iswindows and b'cpu' or b'real'
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128 )
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129 statprof.start(mechanism=b'thread', track=track)
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130
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131 try:
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132 yield
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133 finally:
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134 data = statprof.stop()
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135
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136 profformat = ui.config(b'profiling', b'statformat')
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137
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138 formats = {
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139 b'byline': statprof.DisplayFormats.ByLine,
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140 b'bymethod': statprof.DisplayFormats.ByMethod,
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141 b'hotpath': statprof.DisplayFormats.Hotpath,
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142 b'json': statprof.DisplayFormats.Json,
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143 b'chrome': statprof.DisplayFormats.Chrome,
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144 }
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145
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146 if profformat in formats:
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147 displayformat = formats[profformat]
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148 else:
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149 ui.warn(_(b'unknown profiler output format: %s\n') % profformat)
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150 displayformat = statprof.DisplayFormats.Hotpath
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151
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152 kwargs = {}
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153
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154 def fraction(s):
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155 if isinstance(s, (float, int)):
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156 return float(s)
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157 if s.endswith(b'%'):
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158 v = float(s[:-1]) / 100
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159 else:
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160 v = float(s)
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161 if 0 <= v <= 1:
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162 return v
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163 raise ValueError(s)
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164
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165 if profformat == b'chrome':
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166 showmin = ui.configwith(fraction, b'profiling', b'showmin', 0.005)
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167 showmax = ui.configwith(fraction, b'profiling', b'showmax')
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168 kwargs.update(minthreshold=showmin, maxthreshold=showmax)
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169 elif profformat == b'hotpath':
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170 # inconsistent config: profiling.showmin
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171 limit = ui.configwith(fraction, b'profiling', b'showmin', 0.05)
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172 kwargs[r'limit'] = limit
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173 showtime = ui.configbool(b'profiling', b'showtime')
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174 kwargs[r'showtime'] = showtime
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175
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176 statprof.display(fp, data=data, format=displayformat, **kwargs)
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177
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178
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179 class profile(object):
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180 """Start profiling.
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181
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182 Profiling is active when the context manager is active. When the context
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183 manager exits, profiling results will be written to the configured output.
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184 """
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185
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186 def __init__(self, ui, enabled=True):
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187 self._ui = ui
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188 self._output = None
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189 self._fp = None
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190 self._fpdoclose = True
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191 self._profiler = None
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192 self._enabled = enabled
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193 self._entered = False
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194 self._started = False
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195
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196 def __enter__(self):
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197 self._entered = True
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198 if self._enabled:
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199 self.start()
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200 return self
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201
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202 def start(self):
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203 """Start profiling.
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204
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205 The profiling will stop at the context exit.
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206
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207 If the profiler was already started, this has no effect."""
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208 if not self._entered:
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209 raise error.ProgrammingError()
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210 if self._started:
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211 return
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212 self._started = True
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213 profiler = encoding.environ.get(b'HGPROF')
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214 proffn = None
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215 if profiler is None:
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216 profiler = self._ui.config(b'profiling', b'type')
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217 if profiler not in (b'ls', b'stat', b'flame'):
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218 # try load profiler from extension with the same name
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219 proffn = _loadprofiler(self._ui, profiler)
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220 if proffn is None:
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221 self._ui.warn(
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222 _(b"unrecognized profiler '%s' - ignored\n") % profiler
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223 )
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224 profiler = b'stat'
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225
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226 self._output = self._ui.config(b'profiling', b'output')
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227
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228 try:
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229 if self._output == b'blackbox':
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230 self._fp = util.stringio()
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231 elif self._output:
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232 path = self._ui.expandpath(self._output)
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233 self._fp = open(path, b'wb')
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234 elif pycompat.iswindows:
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235 # parse escape sequence by win32print()
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236 class uifp(object):
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237 def __init__(self, ui):
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238 self._ui = ui
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239
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240 def write(self, data):
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241 self._ui.write_err(data)
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242
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243 def flush(self):
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244 self._ui.flush()
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245
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246 self._fpdoclose = False
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247 self._fp = uifp(self._ui)
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248 else:
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249 self._fpdoclose = False
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250 self._fp = self._ui.ferr
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251
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252 if proffn is not None:
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253 pass
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254 elif profiler == b'ls':
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255 proffn = lsprofile
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256 elif profiler == b'flame':
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257 proffn = flameprofile
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258 else:
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259 proffn = statprofile
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260
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261 self._profiler = proffn(self._ui, self._fp)
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262 self._profiler.__enter__()
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263 except: # re-raises
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264 self._closefp()
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265 raise
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266
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Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32417
diff changeset
267 def __exit__(self, exception_type, exception_value, traceback):
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6675d23da748 profile: properly propagate exception from the sub-context manager
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32809
diff changeset
268 propagate = None
32809
062eb859d3ee profile: close 'fp' in all cases
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32808
diff changeset
269 if self._profiler is not None:
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42423
diff changeset
270 propagate = self._profiler.__exit__(
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42423
diff changeset
271 exception_type, exception_value, traceback
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42423
diff changeset
272 )
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Augie Fackler <augie@google.com>
parents: 43076
diff changeset
273 if self._output == b'blackbox':
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
274 val = b'Profile:\n%s' % self._fp.getvalue()
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Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32808
diff changeset
275 # ui.log treats the input as a format string,
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Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32808
diff changeset
276 # so we need to escape any % signs.
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687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
277 val = val.replace(b'%', b'%%')
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Augie Fackler <augie@google.com>
parents: 43076
diff changeset
278 self._ui.log(b'profile', val)
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3a4c677cbd6e profile: remove now useless indent
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32805
diff changeset
279 self._closefp()
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Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32809
diff changeset
280 return propagate
32804
c0b2c8f25ad9 profiling: move 'fp' closing logic into its own function
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32788
diff changeset
281
c0b2c8f25ad9 profiling: move 'fp' closing logic into its own function
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 32788
diff changeset
282 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
diff changeset
283 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
284 self._fp.close()