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1 ;;; elp.el --- Emacs Lisp Profiler
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2
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3 ;; Copyright (C) 1994 Free Software Foundation, Inc.
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4
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5 ;; Author: 1994-1995 Barry A. Warsaw
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6 ;; Maintainer: tools-help@merlin.cnri.reston.va.us
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7 ;; Created: 26-Feb-1994
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8 ;; Version: 2.32
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9 ;; Last Modified: 1995/07/12 18:53:17
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10 ;; Keywords: debugging lisp tools
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11
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12 ;; This file is part of GNU Emacs.
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13
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14 ;; GNU Emacs is free software; you can redistribute it and/or modify
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15 ;; it under the terms of the GNU General Public License as published by
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16 ;; the Free Software Foundation; either version 2, or (at your option)
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17 ;; any later version.
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18
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19 ;; GNU Emacs is distributed in the hope that it will be useful,
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20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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22 ;; GNU General Public License for more details.
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23
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24 ;; You should have received a copy of the GNU General Public License
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25 ;; along with GNU Emacs; see the file COPYING. If not, write to
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26 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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27
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28 ;;; Synched up with: FSF 19.30.
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29 ;;; In typical "What the hell?" fashion, the version distributed
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30 ;;; with FSF 19.30 claims to be version 2.33 while ours is version 2.32,
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31 ;;; but ours is actually more recent. Is this another example of
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32 ;;; FSFmacs version corruption?
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33
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34 ;;; Commentary:
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35 ;;
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36 ;; If you want to profile a bunch of functions, set elp-function-list
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37 ;; to the list of symbols, then do a M-x elp-instrument-list. This
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38 ;; hacks those functions so that profiling information is recorded
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39 ;; whenever they are called. To print out the current results, use
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40 ;; M-x elp-results. If you want output to go to standard-output
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41 ;; instead of a separate buffer, setq elp-use-standard-output to
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42 ;; non-nil. With elp-reset-after-results set to non-nil, profiling
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43 ;; information will be reset whenever the results are displayed. You
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44 ;; can also reset all profiling info at any time with M-x
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45 ;; elp-reset-all.
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46 ;;
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47 ;; You can also instrument all functions in a package, provided that
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48 ;; the package follows the GNU coding standard of a common textural
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49 ;; prefix. Use M-x elp-instrument-package for this.
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50 ;;
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51 ;; If you want to sort the results, set elp-sort-by-function to some
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52 ;; predicate function. The three most obvious choices are predefined:
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53 ;; elp-sort-by-call-count, elp-sort-by-average-time, and
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54 ;; elp-sort-by-total-time. Also, you can prune from the output, all
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55 ;; functions that have been called fewer than a given number of times
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56 ;; by setting elp-report-limit.
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57 ;;
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58 ;; Elp can instrument byte-compiled functions just as easily as
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59 ;; interpreted functions, but it cannot instrument macros. However,
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60 ;; when you redefine a function (e.g. with eval-defun), you'll need to
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61 ;; re-instrument it with M-x elp-instrument-function. This will also
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62 ;; reset profiling information for that function. Elp can handle
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63 ;; interactive functions (i.e. commands), but of course any time spent
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64 ;; idling for user prompts will show up in the timing results.
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65 ;;
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66 ;; You can also designate a `master' function. Profiling times will
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67 ;; be gathered for instrumented functions only during execution of
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68 ;; this master function. Thus, if you have some defuns like:
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69 ;;
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70 ;; (defun foo () (do-something-time-intensive))
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71 ;; (defun bar () (foo))
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72 ;; (defun baz () (bar) (foo))
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73 ;;
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74 ;; and you want to find out the amount of time spent in bar and foo,
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75 ;; but only during execution of bar, make bar the master. The call of
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76 ;; foo from baz will not add to foo's total timing sums. Use M-x
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77 ;; elp-set-master and M-x elp-unset-master to utilize this feature.
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78 ;; Only one master function can be set at a time.
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79
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80 ;; You can restore any function's original function definition with
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81 ;; elp-restore-function. The other instrument, restore, and reset
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82 ;; functions are provided for symmetry.
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83
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84 ;; Note that there are plenty of factors that could make the times
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85 ;; reported unreliable, including the accuracy and granularity of your
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86 ;; system clock, and the overhead spent in lisp calculating and
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87 ;; recording the intervals. The latter I figure is pretty constant
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88 ;; so, while the times may not be entirely accurate, I think they'll
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89 ;; give you a good feel for the relative amount of work spent in the
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90 ;; various lisp routines you are profiling. Note further that times
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91 ;; are calculated using wall-clock time, so other system load will
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92 ;; affect accuracy too.
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93
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94 ;; Here is a list of variable you can use to customize elp:
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95 ;; elp-function-list
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96 ;; elp-reset-after-results
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97 ;; elp-sort-by-function
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98 ;; elp-report-limit
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99 ;;
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100 ;; Here is a list of the interactive commands you can use:
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101 ;; elp-instrument-function
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102 ;; elp-restore-function
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103 ;; elp-instrument-list
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104 ;; elp-restore-list
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105 ;; elp-instrument-package
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106 ;; elp-restore-all
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107 ;; elp-reset-function
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108 ;; elp-reset-list
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109 ;; elp-reset-all
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110 ;; elp-set-master
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111 ;; elp-unset-master
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112 ;; elp-results
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113 ;; elp-submit-bug-report
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114
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115 ;; Note that there are plenty of factors that could make the times
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116 ;; reported unreliable, including the accuracy and granularity of your
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117 ;; system clock, and the overhead spent in lisp calculating and
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118 ;; recording the intervals. I figure the latter is pretty constant,
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119 ;; so while the times may not be entirely accurate, I think they'll
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120 ;; give you a good feel for the relative amount of work spent in the
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121 ;; various lisp routines you are profiling. Note further that times
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122 ;; are calculated using wall-clock time, so other system load will
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123 ;; affect accuracy too. You cannot profile anything longer than ~18
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124 ;; hours since I throw away the most significant 16 bits of seconds
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125 ;; returned by current-time: 2^16 == 65536 seconds == ~1092 minutes ==
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126 ;; ~18 hours. I doubt you will ever want to profile stuff on the
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127 ;; order of 18 hours anyway.
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128
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129 ;;; Background:
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130 ;;
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131 ;; This program was inspired by the only two existing Emacs Lisp
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132 ;; profilers that I'm aware of, Boaz Ben-Zvi's profile.el, and Root
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133 ;; Boy Jim's profiler.el. Both were written for Emacs 18 and both were
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134 ;; pretty good first shots at profiling, but I found that they didn't
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135 ;; provide the functionality or interface that I wanted, so I wrote
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136 ;; this. I've tested elp in XEmacs 19 and Emacs 19. There's no point
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137 ;; in even trying to make this work with Emacs 18.
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138
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139 ;; Unlike previous profilers, elp uses Emacs 19's built-in function
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140 ;; current-time to return interval times. This obviates the need for
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141 ;; both an external C program and Emacs processes to communicate with
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142 ;; such a program, and thus simplifies the package as a whole.
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143
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144 ;; TBD:
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145 ;; Make this act like a real profiler, so that it records time spent
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146 ;; in all branches of execution.
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147
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148 ;; LCD Archive Entry:
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149 ;; elp|Barry A. Warsaw|tools-help@merlin.cnri.reston.va.us|
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150 ;; Emacs Lisp Profiler|
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151 ;; 1995/07/12 18:53:17|2.32|~/misc/elp.el.Z|
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152
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153 ;;; Code:
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154
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155
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156 ;; start of user configuration variables
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157 ;; vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
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158
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159 (defvar elp-function-list nil
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160 "*List of functions to profile.
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161 Used by the command `elp-instrument-list'.")
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162
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163 (defvar elp-reset-after-results t
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164 "*Non-nil means reset all profiling info after results are displayed.
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165 Results are displayed with the `elp-results' command.")
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166
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167 (defvar elp-sort-by-function 'elp-sort-by-total-time
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168 "*Non-nil specifies elp results sorting function.
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169 These functions are currently available:
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170
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171 elp-sort-by-call-count -- sort by the highest call count
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172 elp-sort-by-total-time -- sort by the highest total time
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173 elp-sort-by-average-time -- sort by the highest average times
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174
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175 You can write you're own sort function. It should adhere to the
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176 interface specified by the PRED argument for the `sort' defun. Each
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177 \"element of LIST\" is really a 4 element vector where element 0 is
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178 the call count, element 1 is the total time spent in the function,
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179 element 2 is the average time spent in the function, and element 3 is
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180 the symbol's name string.")
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181
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182 (defvar elp-report-limit 1
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183 "*Prevents some functions from being displayed in the results buffer.
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184 If a number, no function that has been called fewer than that number
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185 of times will be displayed in the output buffer. If nil, all
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186 functions will be displayed.")
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187
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188 (defvar elp-use-standard-output nil
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189 "*Non-nil says to output to `standard-output' instead of a buffer.")
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190
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191 (defvar elp-recycle-buffers-p t
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192 "*Nil says to not recycle the `elp-results-buffer'.
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193 In other words, a new unique buffer is create every time you run
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194 \\[elp-results].")
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195
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196
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197 ;; ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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198 ;; end of user configuration variables
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199
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200
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201 (defconst elp-version "2.32"
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202 "ELP version number.")
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203
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204 (defconst elp-help-address "tools-help@merlin.cnri.reston.va.us"
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205 "Address accepting submissions of bug reports and questions.")
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206
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207 (defvar elp-results-buffer "*ELP Profiling Results*"
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208 "Buffer name for outputting profiling results.")
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209
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210 (defconst elp-timer-info-property 'elp-info
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211 "ELP information property name.")
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212
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213 (defvar elp-all-instrumented-list nil
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214 "List of all functions currently being instrumented.")
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215
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216 (defvar elp-record-p t
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217 "Controls whether functions should record times or not.
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218 This variable is set by the master function.")
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219
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220 (defvar elp-master nil
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221 "Master function symbol.")
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222
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223
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224 ;;;###autoload
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225 (defun elp-instrument-function (funsym)
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226 "Instrument FUNSYM for profiling.
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227 FUNSYM must be a symbol of a defined function."
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228 (interactive "aFunction to instrument: ")
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229 ;; raise an error if the function is already instrumented
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230 (and (get funsym elp-timer-info-property)
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231 (error "Symbol `%s' is already instrumented for profiling." funsym))
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232 (let* ((funguts (symbol-function funsym))
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233 (infovec (vector 0 0 funguts))
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234 (newguts '(lambda (&rest args))))
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235 ;; we cannot profile macros
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236 (and (eq (car-safe funguts) 'macro)
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237 (error "ELP cannot profile macro %s" funsym))
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238 ;; put rest of newguts together
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239 (if (commandp funsym)
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240 (setq newguts (append newguts '((interactive)))))
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241 (setq newguts (append newguts (list
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242 (list 'elp-wrapper
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243 (list 'quote funsym)
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244 (list 'and
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245 '(interactive-p)
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246 (not (not (commandp funsym))))
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247 'args))))
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248 ;; to record profiling times, we set the symbol's function
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249 ;; definition so that it runs the elp-wrapper function with the
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250 ;; function symbol as an argument. We place the old function
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251 ;; definition on the info vector.
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252 ;;
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253 ;; The info vector data structure is a 3 element vector. The 0th
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254 ;; element is the call-count, i.e. the total number of times this
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255 ;; function has been entered. This value is bumped up on entry to
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256 ;; the function so that non-local exists are still recorded. TBD:
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257 ;; I haven't tested non-local exits at all, so no guarantees.
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258 ;;
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259 ;; The 1st element is the total amount of time in usecs that have
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260 ;; been spent inside this function. This number is added to on
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261 ;; function exit.
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262 ;;
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263 ;; The 2nd element is the old function definition list. This gets
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264 ;; funcall'd in between start/end time retrievals. I believe that
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265 ;; this lets us profile even byte-compiled functions.
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266
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267 ;; put the info vector on the property list
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268 (put funsym elp-timer-info-property infovec)
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269
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270 ;; set the symbol's new profiling function definition to run
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271 ;; elp-wrapper
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272 (fset funsym newguts)
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273
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274 ;; add this function to the instrumentation list
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275 (or (memq funsym elp-all-instrumented-list)
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276 (setq elp-all-instrumented-list
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277 (cons funsym elp-all-instrumented-list)))
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278 ))
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279
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280 ;;;###autoload
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281 (defun elp-restore-function (funsym)
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282 "Restore an instrumented function to its original definition.
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283 Argument FUNSYM is the symbol of a defined function."
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284 (interactive "aFunction to restore: ")
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285 (let ((info (get funsym elp-timer-info-property)))
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286 ;; delete the function from the all instrumented list
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287 (setq elp-all-instrumented-list
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288 (delq funsym elp-all-instrumented-list))
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289
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290 ;; if the function was the master, reset the master
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291 (if (eq funsym elp-master)
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292 (setq elp-master nil
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293 elp-record-p t))
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294
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295 ;; zap the properties
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296 (put funsym elp-timer-info-property nil)
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297
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298 ;; restore the original function definition, but if the function
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299 ;; wasn't instrumented do nothing. we do this after the above
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300 ;; because its possible the function got un-instrumented due to
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301 ;; circumstances beyond our control. Also, check to make sure
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302 ;; that the current function symbol points to elp-wrapper. If
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303 ;; not, then the user probably did an eval-defun while the
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304 ;; function was instrumented and we don't want to destroy the new
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305 ;; definition.
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306 (and info
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307 (assq 'elp-wrapper (symbol-function funsym))
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308 (fset funsym (aref info 2)))))
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309
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310 ;;;###autoload
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311 (defun elp-instrument-list (&optional list)
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312 "Instrument for profiling, all functions in `elp-function-list'.
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313 Use optional LIST if provided instead."
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314 (interactive "PList of functions to instrument: ")
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315 (let ((list (or list elp-function-list)))
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316 (mapcar
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317 (function
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318 (lambda (funsym)
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319 (condition-case nil
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320 (elp-instrument-function funsym)
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321 (error nil))))
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322 list)))
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323
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324 ;;;###autoload
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325 (defun elp-instrument-package (prefix)
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326 "Instrument for profiling, all functions which start with PREFIX.
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327 For example, to instrument all ELP functions, do the following:
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328
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329 \\[elp-instrument-package] RET elp- RET"
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330 (interactive "sPrefix of package to instrument: ")
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331 (elp-instrument-list
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332 (mapcar 'intern (all-completions prefix obarray
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333 (function
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334 (lambda (sym)
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335 (and (fboundp sym)
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336 (not (eq (car-safe
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337 (symbol-function sym))
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338 'macro)))))))))
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339
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340 (defun elp-restore-list (&optional list)
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341 "Restore the original definitions for all functions in `elp-function-list'.
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342 Use optional LIST if provided instead."
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343 (interactive "PList of functions to restore: ")
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344 (let ((list (or list elp-function-list)))
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345 (mapcar 'elp-restore-function list)))
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346
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347 (defun elp-restore-all ()
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348 "Restores the original definitions of all functions being profiled."
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349 (interactive)
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350 (elp-restore-list elp-all-instrumented-list))
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351
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352
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353 (defun elp-reset-function (funsym)
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354 "Reset the profiling information for FUNSYM."
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355 (interactive "aFunction to reset: ")
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356 (let ((info (get funsym elp-timer-info-property)))
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357 (or info
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358 (error "%s is not instrumented for profiling." funsym))
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359 (aset info 0 0) ;reset call counter
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360 (aset info 1 0.0) ;reset total time
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361 ;; don't muck with aref 2 as that is the old symbol definition
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362 ))
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363
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364 (defun elp-reset-list (&optional list)
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365 "Reset the profiling information for all functions in `elp-function-list'.
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366 Use optional LIST if provided instead."
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367 (interactive "PList of functions to reset: ")
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368 (let ((list (or list elp-function-list)))
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369 (mapcar 'elp-reset-function list)))
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370
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371 (defun elp-reset-all ()
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372 "Reset the profiling information for all functions being profiled."
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373 (interactive)
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374 (elp-reset-list elp-all-instrumented-list))
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375
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376 (defun elp-set-master (funsym)
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377 "Set the master function for profiling."
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378 (interactive "aMaster function: ")
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379 ;; when there's a master function, recording is turned off by
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380 ;; default
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381 (setq elp-master funsym
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382 elp-record-p nil)
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383 ;; make sure master function is instrumented
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384 (or (memq funsym elp-all-instrumented-list)
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385 (elp-instrument-function funsym)))
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386
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387 (defun elp-unset-master ()
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388 "Unsets the master function."
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389 (interactive)
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390 ;; when there's no master function, recording is turned on by default.
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391 (setq elp-master nil
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392 elp-record-p t))
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393
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394
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395 (defsubst elp-get-time ()
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396 ;; get current time in seconds and microseconds. I throw away the
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397 ;; most significant 16 bits of seconds since I doubt we'll ever want
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398 ;; to profile lisp on the order of 18 hours. See notes at top of file.
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399 (let ((now (current-time)))
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400 (+ (float (nth 1 now)) (/ (float (nth 2 now)) 1000000.0))))
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401
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402 (defun elp-wrapper (funsym interactive-p args)
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403 "This function has been instrumented for profiling by the ELP.
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404 ELP is the Emacs Lisp Profiler. To restore the function to its
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405 original definition, use \\[elp-restore-function] or \\[elp-restore-all]."
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406 ;; turn on recording if this is the master function
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407 (if (and elp-master
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408 (eq funsym elp-master))
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409 (setq elp-record-p t))
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410 ;; get info vector and original function symbol
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411 (let* ((info (get funsym elp-timer-info-property))
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412 (func (aref info 2))
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413 result)
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414 (or func
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415 (error "%s is not instrumented for profiling." funsym))
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416 (if (not elp-record-p)
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417 ;; when not recording, just call the original function symbol
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418 ;; and return the results.
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419 (setq result
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420 (if interactive-p
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421 (call-interactively func)
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422 (apply func args)))
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423 ;; we are recording times
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424 (let ((enter-time (elp-get-time)))
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425 ;; increment the call-counter
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426 (aset info 0 (1+ (aref info 0)))
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427 ;; now call the old symbol function, checking to see if it
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428 ;; should be called interactively. make sure we return the
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429 ;; correct value
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430 (setq result
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431 (if interactive-p
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432 (call-interactively func)
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433 (apply func args)))
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434 ;; calculate total time in function
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435 (aset info 1 (+ (aref info 1) (- (elp-get-time) enter-time)))
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436 ))
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437 ;; turn off recording if this is the master function
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438 (if (and elp-master
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439 (eq funsym elp-master))
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440 (setq elp-record-p nil))
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441 result))
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442
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443
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444 ;; shut the byte-compiler up
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445 (defvar elp-field-len nil)
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446 (defvar elp-cc-len nil)
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447 (defvar elp-at-len nil)
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448 (defvar elp-et-len nil)
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449
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450 (defun elp-sort-by-call-count (vec1 vec2)
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451 ;; sort by highest call count. See `sort'.
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452 (>= (aref vec1 0) (aref vec2 0)))
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453
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454 (defun elp-sort-by-total-time (vec1 vec2)
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455 ;; sort by highest total time spent in function. See `sort'.
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456 (>= (aref vec1 1) (aref vec2 1)))
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457
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458 (defun elp-sort-by-average-time (vec1 vec2)
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459 ;; sort by highest average time spent in function. See `sort'.
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460 (>= (aref vec1 2) (aref vec2 2)))
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461
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462 (defsubst elp-pack-number (number width)
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463 ;; pack the NUMBER string into WIDTH characters, watching out for
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464 ;; very small or large numbers
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465 (if (<= (length number) width)
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466 number
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467 ;; check for very large or small numbers
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468 (if (string-match "^\\(.*\\)\\(e[+-].*\\)$" number)
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469 (concat (substring
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470 (substring number (match-beginning 1) (match-end 1))
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471 0
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472 (- width (match-end 2) (- (match-beginning 2)) 3))
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473 "..."
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474 (substring number (match-beginning 2) (match-end 2)))
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475 (concat (substring number 0 width)))))
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476
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477 (defun elp-output-result (resultvec)
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478 ;; output the RESULTVEC into the results buffer. RESULTVEC is a 4 or
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479 ;; more element vector where aref 0 is the call count, aref 1 is the
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480 ;; total time spent in the function, aref 2 is the average time
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481 ;; spent in the function, and aref 3 is the symbol's string
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482 ;; name. All other elements in the vector are ignored.
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483 (let* ((cc (aref resultvec 0))
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484 (tt (aref resultvec 1))
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485 (at (aref resultvec 2))
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486 (symname (aref resultvec 3))
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487 callcnt totaltime avetime)
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488 (setq callcnt (number-to-string cc)
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489 totaltime (number-to-string tt)
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490 avetime (number-to-string at))
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491 ;; possibly prune the results
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492 (if (and elp-report-limit
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493 (numberp elp-report-limit)
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494 (< cc elp-report-limit))
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495 nil
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496 (insert symname)
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497 (insert-char 32 (+ elp-field-len (- (length symname)) 2))
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498 ;; print stuff out, formatting it nicely
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499 (insert callcnt)
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500 (insert-char 32 (+ elp-cc-len (- (length callcnt)) 2))
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501 (let ((ttstr (elp-pack-number totaltime elp-et-len))
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502 (atstr (elp-pack-number avetime elp-at-len)))
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503 (insert ttstr)
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504 (insert-char 32 (+ elp-et-len (- (length ttstr)) 2))
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505 (insert atstr))
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506 (insert "\n"))))
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507
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508 ;;;###autoload
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509 (defun elp-results ()
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510 "Display current profiling results.
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511 If `elp-reset-after-results' is non-nil, then current profiling
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512 information for all instrumented functions are reset after results are
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513 displayed."
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514 (interactive)
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515 (let ((curbuf (current-buffer))
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516 (resultsbuf (if elp-recycle-buffers-p
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517 (get-buffer-create elp-results-buffer)
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518 (generate-new-buffer elp-results-buffer))))
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519 (set-buffer resultsbuf)
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520 (erase-buffer)
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521 (beginning-of-buffer)
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522 ;; get the length of the longest function name being profiled
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523 (let* ((longest 0)
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524 (title "Function Name")
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525 (titlelen (length title))
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526 (elp-field-len titlelen)
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527 (cc-header "Call Count")
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528 (elp-cc-len (length cc-header))
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529 (et-header "Elapsed Time")
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530 (elp-et-len (length et-header))
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531 (at-header "Average Time")
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532 (elp-at-len (length at-header))
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533 (resvec
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|
534 (mapcar
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|
535 (function
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536 (lambda (funsym)
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537 (let* ((info (get funsym elp-timer-info-property))
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538 (symname (format "%s" funsym))
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539 (cc (aref info 0))
|
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|
540 (tt (aref info 1)))
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|
541 (if (not info)
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|
542 (insert "No profiling information found for: "
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|
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543 symname)
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|
544 (setq longest (max longest (length symname)))
|
|
|
545 (vector cc tt (if (zerop cc)
|
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546 0.0 ;avoid arithmetic div-by-zero errors
|
|
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547 (/ (float tt) (float cc)))
|
|
|
548 symname)))))
|
|
|
549 elp-all-instrumented-list))
|
|
|
550 ) ; end let*
|
|
|
551 (insert title)
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|
|
552 (if (> longest titlelen)
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|
|
553 (progn
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|
|
554 (insert-char 32 (- longest titlelen))
|
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|
555 (setq elp-field-len longest)))
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556 (insert " " cc-header " " et-header " " at-header "\n")
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|
557 (insert-char ?= elp-field-len)
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|
558 (insert " ")
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|
559 (insert-char ?= elp-cc-len)
|
|
|
560 (insert " ")
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|
|
561 (insert-char ?= elp-et-len)
|
|
|
562 (insert " ")
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|
|
563 (insert-char ?= elp-at-len)
|
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|
564 (insert "\n")
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|
565 ;; if sorting is enabled, then sort the results list. in either
|
|
|
566 ;; case, call elp-output-result to output the result in the
|
|
|
567 ;; buffer
|
|
|
568 (if elp-sort-by-function
|
|
|
569 (setq resvec (sort resvec elp-sort-by-function)))
|
|
|
570 (mapcar 'elp-output-result resvec))
|
|
|
571 ;; now pop up results buffer
|
|
|
572 (set-buffer curbuf)
|
|
|
573 (pop-to-buffer resultsbuf)
|
|
|
574 ;; copy results to standard-output?
|
|
|
575 (if (or elp-use-standard-output noninteractive)
|
|
|
576 (princ (buffer-substring (point-min) (point-max))))
|
|
|
577 ;; reset profiling info if desired
|
|
|
578 (and elp-reset-after-results
|
|
|
579 (elp-reset-all))))
|
|
|
580
|
|
|
581
|
|
|
582 (eval-when-compile
|
|
|
583 (require 'reporter))
|
|
|
584
|
|
|
585 ;;;###autoload
|
|
|
586 (defun elp-submit-bug-report ()
|
|
|
587 "Submit via mail, a bug report on elp."
|
|
|
588 (interactive)
|
|
|
589 (and
|
|
|
590 (y-or-n-p "Do you want to submit a report on elp? ")
|
|
|
591 (require 'reporter)
|
|
|
592 (reporter-submit-bug-report
|
|
|
593 elp-help-address (concat "elp " elp-version)
|
|
|
594 '(elp-report-limit
|
|
|
595 elp-reset-after-results
|
|
|
596 elp-sort-by-function))))
|
|
|
597
|
|
|
598
|
|
|
599 (provide 'elp)
|
|
|
600
|
|
|
601 ;; elp.el ends here
|
