Mercurial > hg
annotate mercurial/profiling.py @ 50757:19108906abaf stable
extensions: imp module is removed in Python 3.12 - use importlib to load files
imp has been deprecated for a long time, and has finally been removed in Python
3.12 .
imp was only used for loading extensions that has been specified with direct
.py path or path to a package directory. The same use cases can be achieved
quite simple with importlib, , possiby with small changes in corner cases with
undefined behaviour, such as extensions without .py source.
There might also be corner cases and undefined behaviour around use of
sys.modules and reloading.
author | Mads Kiilerich <mads@kiilerich.com> |
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date | Wed, 28 Jun 2023 14:23:13 +0200 |
parents | 642e31cb55f0 |
children | 18c8c18993f0 |
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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 |
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9 import contextlib |
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10 |
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11 from .i18n import _ |
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12 from .pycompat import ( |
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13 getattr, |
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14 open, |
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15 ) |
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16 from . import ( |
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17 encoding, |
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18 error, |
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19 extensions, |
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20 pycompat, |
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21 util, |
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22 ) |
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23 |
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24 |
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25 def _loadprofiler(ui, profiler): |
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26 """load profiler extension. return profile method, or None on failure""" |
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27 extname = profiler |
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28 extensions.loadall(ui, whitelist=[extname]) |
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29 try: |
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30 mod = extensions.find(extname) |
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31 except KeyError: |
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32 return None |
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33 else: |
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34 return getattr(mod, 'profile', None) |
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35 |
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36 |
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37 @contextlib.contextmanager |
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38 def lsprofile(ui, fp): |
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39 format = ui.config(b'profiling', b'format') |
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40 field = ui.config(b'profiling', b'sort') |
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41 limit = ui.configint(b'profiling', b'limit') |
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42 climit = ui.configint(b'profiling', b'nested') |
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43 |
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44 if format not in [b'text', b'kcachegrind']: |
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45 ui.warn(_(b"unrecognized profiling format '%s' - Ignored\n") % format) |
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46 format = b'text' |
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47 |
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48 try: |
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49 from . import lsprof |
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50 except ImportError: |
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51 raise error.Abort( |
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52 _( |
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53 b'lsprof not available - install from ' |
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54 b'http://codespeak.net/svn/user/arigo/hack/misc/lsprof/' |
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55 ) |
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56 ) |
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57 p = lsprof.Profiler() |
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58 p.enable(subcalls=True) |
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59 try: |
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60 yield |
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61 finally: |
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62 p.disable() |
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63 |
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64 if format == b'kcachegrind': |
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65 from . import lsprofcalltree |
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66 |
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67 calltree = lsprofcalltree.KCacheGrind(p) |
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68 calltree.output(fp) |
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69 else: |
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70 # format == 'text' |
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71 stats = lsprof.Stats(p.getstats()) |
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72 stats.sort(pycompat.sysstr(field)) |
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73 stats.pprint(limit=limit, file=fp, climit=climit) |
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74 |
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75 |
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76 @contextlib.contextmanager |
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77 def flameprofile(ui, fp): |
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78 try: |
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79 from flamegraph import flamegraph # pytype: disable=import-error |
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80 except ImportError: |
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81 raise error.Abort( |
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82 _( |
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83 b'flamegraph not available - install from ' |
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84 b'https://github.com/evanhempel/python-flamegraph' |
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85 ) |
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86 ) |
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87 # developer config: profiling.freq |
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88 freq = ui.configint(b'profiling', b'freq') |
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89 filter_ = None |
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90 collapse_recursion = True |
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91 thread = flamegraph.ProfileThread( |
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92 fp, 1.0 / freq, filter_, collapse_recursion |
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93 ) |
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94 start_time = util.timer() |
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95 try: |
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96 thread.start() |
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97 yield |
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98 finally: |
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99 thread.stop() |
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100 thread.join() |
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101 print( |
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102 b'Collected %d stack frames (%d unique) in %2.2f seconds.' |
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103 % ( |
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104 util.timer() - start_time, |
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105 thread.num_frames(), |
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106 thread.num_frames(unique=True), |
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107 ) |
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108 ) |
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109 |
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110 |
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111 @contextlib.contextmanager |
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112 def statprofile(ui, fp): |
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113 from . import statprof |
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114 |
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115 freq = ui.configint(b'profiling', b'freq') |
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116 if freq > 0: |
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117 # Cannot reset when profiler is already active. So silently no-op. |
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118 if statprof.state.profile_level == 0: |
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119 statprof.reset(freq) |
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120 else: |
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121 ui.warn(_(b"invalid sampling frequency '%s' - ignoring\n") % freq) |
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122 |
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123 track = ui.config( |
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124 b'profiling', b'time-track', pycompat.iswindows and b'cpu' or b'real' |
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125 ) |
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126 statprof.start(mechanism=b'thread', track=track) |
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127 |
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128 try: |
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129 yield |
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130 finally: |
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131 data = statprof.stop() |
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132 |
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133 profformat = ui.config(b'profiling', b'statformat') |
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134 |
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135 formats = { |
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136 b'byline': statprof.DisplayFormats.ByLine, |
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137 b'bymethod': statprof.DisplayFormats.ByMethod, |
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138 b'hotpath': statprof.DisplayFormats.Hotpath, |
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139 b'json': statprof.DisplayFormats.Json, |
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140 b'chrome': statprof.DisplayFormats.Chrome, |
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141 } |
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142 |
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143 if profformat in formats: |
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144 displayformat = formats[profformat] |
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145 else: |
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146 ui.warn(_(b'unknown profiler output format: %s\n') % profformat) |
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147 displayformat = statprof.DisplayFormats.Hotpath |
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148 |
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149 kwargs = {} |
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150 |
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151 def fraction(s): |
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152 if isinstance(s, (float, int)): |
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153 return float(s) |
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154 if s.endswith(b'%'): |
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155 v = float(s[:-1]) / 100 |
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156 else: |
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157 v = float(s) |
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158 if 0 <= v <= 1: |
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159 return v |
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160 raise ValueError(s) |
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161 |
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162 if profformat == b'chrome': |
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163 showmin = ui.configwith(fraction, b'profiling', b'showmin', 0.005) |
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164 showmax = ui.configwith(fraction, b'profiling', b'showmax') |
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165 kwargs.update(minthreshold=showmin, maxthreshold=showmax) |
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166 elif profformat == b'hotpath': |
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167 # inconsistent config: profiling.showmin |
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168 limit = ui.configwith(fraction, b'profiling', b'showmin', 0.05) |
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169 kwargs['limit'] = limit |
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170 showtime = ui.configbool(b'profiling', b'showtime') |
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171 kwargs['showtime'] = showtime |
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172 |
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173 statprof.display(fp, data=data, format=displayformat, **kwargs) |
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174 |
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175 |
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176 class profile: |
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177 """Start profiling. |
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178 |
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179 Profiling is active when the context manager is active. When the context |
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180 manager exits, profiling results will be written to the configured output. |
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181 """ |
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182 |
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183 def __init__(self, ui, enabled=True): |
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184 self._ui = ui |
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185 self._output = None |
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186 self._fp = None |
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187 self._fpdoclose = True |
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188 self._flushfp = None |
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189 self._profiler = None |
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190 self._enabled = enabled |
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191 self._entered = False |
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192 self._started = False |
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193 |
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194 def __enter__(self): |
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195 self._entered = True |
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196 if self._enabled: |
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197 self.start() |
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198 return self |
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199 |
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200 def start(self): |
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201 """Start profiling. |
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202 |
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203 The profiling will stop at the context exit. |
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204 |
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205 If the profiler was already started, this has no effect.""" |
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206 if not self._entered: |
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207 raise error.ProgrammingError(b'use a context manager to start') |
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208 if self._started: |
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209 return |
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210 self._started = True |
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211 profiler = encoding.environ.get(b'HGPROF') |
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212 proffn = None |
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213 if profiler is None: |
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214 profiler = self._ui.config(b'profiling', b'type') |
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215 if profiler not in (b'ls', b'stat', b'flame'): |
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216 # try load profiler from extension with the same name |
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217 proffn = _loadprofiler(self._ui, profiler) |
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218 if proffn is None: |
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219 self._ui.warn( |
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220 _(b"unrecognized profiler '%s' - ignored\n") % profiler |
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221 ) |
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222 profiler = b'stat' |
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223 |
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224 self._output = self._ui.config(b'profiling', b'output') |
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225 |
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226 try: |
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227 if self._output == b'blackbox': |
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228 self._fp = util.stringio() |
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229 elif self._output: |
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230 path = util.expandpath(self._output) |
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231 self._fp = open(path, b'wb') |
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232 elif pycompat.iswindows: |
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233 # parse escape sequence by win32print() |
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234 class uifp: |
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235 def __init__(self, ui): |
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236 self._ui = ui |
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237 |
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238 def write(self, data): |
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239 self._ui.write_err(data) |
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240 |
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241 def flush(self): |
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242 self._ui.flush() |
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243 |
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244 self._fpdoclose = False |
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245 self._fp = uifp(self._ui) |
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246 else: |
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247 self._fpdoclose = False |
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248 self._fp = self._ui.ferr |
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249 # Ensure we've flushed fout before writing to ferr. |
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250 self._flushfp = self._ui.fout |
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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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267 def __exit__(self, exception_type, exception_value, traceback): |
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268 propagate = None |
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269 if self._profiler is not None: |
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270 self._uiflush() |
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271 propagate = self._profiler.__exit__( |
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272 exception_type, exception_value, traceback |
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273 ) |
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274 if self._output == b'blackbox': |
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275 val = b'Profile:\n%s' % self._fp.getvalue() |
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276 # ui.log treats the input as a format string, |
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277 # so we need to escape any % signs. |
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278 val = val.replace(b'%', b'%%') |
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279 self._ui.log(b'profile', val) |
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280 self._closefp() |
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281 return propagate |
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282 |
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283 def _closefp(self): |
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284 if self._fpdoclose and self._fp is not None: |
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285 self._fp.close() |
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286 |
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287 def _uiflush(self): |
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288 if self._flushfp: |
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289 self._flushfp.flush() |