Mercurial > octave-nkf
annotate src/profiler.h @ 15536:2e8eb9ac43a5 stable rc-3-6-4-0
3.6.4-rc0 release candidate
* configure.ac (AC_INIT): Version is now 3.6.2-rc0.
(OCTAVE_RELEASE_DATE): Now 2012-05-11.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 17 Oct 2012 10:05:44 -0400 |
parents | 72c96de7a403 |
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1 /* |
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2 |
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3 Copyright (C) 2012 Daniel Kraft |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 3 of the License, or (at your |
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10 option) any later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, see |
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19 <http://www.gnu.org/licenses/>. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_profiler_h) |
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24 #define octave_profiler_h 1 |
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25 |
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26 #include <cstddef> |
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27 #include <map> |
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28 #include <set> |
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29 #include <string> |
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30 #include <vector> |
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31 |
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32 class octave_value; |
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33 |
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34 class |
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35 OCTINTERP_API |
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36 profile_data_accumulator |
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37 { |
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38 public: |
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39 |
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40 // This is a utility class that can be used to call the enter/exit |
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41 // functions in a manner protected from stack unwinding. |
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42 class enter |
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43 { |
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44 private: |
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45 |
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46 profile_data_accumulator& acc; |
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47 std::string fcn; |
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48 |
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49 public: |
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50 |
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51 enter (profile_data_accumulator&, const std::string&); |
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52 virtual ~enter (void); |
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53 |
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54 private: |
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55 |
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56 // No copying! |
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57 enter (const enter&); |
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58 enter& operator = (const enter&); |
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59 }; |
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60 |
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61 profile_data_accumulator (void); |
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62 virtual ~profile_data_accumulator (); |
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63 |
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64 bool is_active (void) const { return enabled; } |
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65 void set_active (bool); |
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66 |
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67 void reset (void); |
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68 |
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69 octave_value get_flat (void) const; |
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70 octave_value get_hierarchical (void) const; |
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71 |
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72 private: |
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73 |
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74 // One entry in the flat profile (i.e., a collection of data for a single |
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75 // function). This is filled in when building the flat profile from the |
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76 // hierarchical call tree. |
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77 struct stats |
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78 { |
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79 stats (); |
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80 |
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81 double time; |
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82 unsigned calls; |
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83 |
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84 bool recursive; |
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85 |
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86 typedef std::set<octave_idx_type> function_set; |
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87 function_set parents; |
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88 function_set children; |
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89 |
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90 // Convert a function_set list to an Octave array of indices. |
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91 static octave_value function_set_value (const function_set&); |
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92 }; |
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93 |
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94 typedef std::vector<stats> flat_profile; |
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95 |
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96 // Store data for one node in the call-tree of the hierarchical profiler |
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97 // data we collect. |
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98 class tree_node |
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99 { |
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100 public: |
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101 |
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102 tree_node (tree_node*, octave_idx_type); |
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103 virtual ~tree_node (); |
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104 |
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105 void add_time (double dt) { time += dt; } |
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106 |
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107 // Enter a child function. It is created in the list of children if it |
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108 // wasn't already there. The now-active child node is returned. |
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109 tree_node* enter (octave_idx_type); |
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110 |
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111 // Exit function. As a sanity-check, it is verified that the currently |
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112 // active function actually is the one handed in here. Returned is the |
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113 // then-active node, which is our parent. |
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114 tree_node* exit (octave_idx_type); |
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115 |
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116 void build_flat (flat_profile&) const; |
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117 |
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118 // Get the hierarchical profile for this node and its children. If total |
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119 // is set, accumulate total time of the subtree in that variable as |
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120 // additional return value. |
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121 octave_value get_hierarchical (double* total = NULL) const; |
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122 |
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123 private: |
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124 |
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125 tree_node* parent; |
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126 octave_idx_type fcn_id; |
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127 |
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128 typedef std::map<octave_idx_type, tree_node*> child_map; |
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129 child_map children; |
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130 |
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131 // This is only time spent *directly* on this level, excluding children! |
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132 double time; |
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133 |
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134 unsigned calls; |
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135 |
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136 // No copying! |
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137 tree_node (const tree_node&); |
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138 tree_node& operator = (const tree_node&); |
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139 }; |
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140 |
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141 // Each function we see in the profiler is given a unique index (which |
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142 // simply counts starting from 1). We thus have to map profiler-names to |
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143 // those indices. For all other stuff, we identify functions by their index. |
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144 |
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145 typedef std::vector<std::string> function_set; |
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146 typedef std::map<std::string, octave_idx_type> fcn_index_map; |
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147 |
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148 function_set known_functions; |
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149 fcn_index_map fcn_index; |
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150 |
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151 bool enabled; |
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152 |
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153 tree_node* call_tree; |
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154 tree_node* active_fcn; |
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155 |
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156 // Store last timestamp we had, when the currently active function was called. |
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157 double last_time; |
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158 |
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159 // These are private as only the unwind-protecting inner class enter |
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160 // should be allowed to call them. |
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161 void enter_function (const std::string&); |
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162 void exit_function (const std::string&); |
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163 |
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164 // Query a timestamp, used for timing calls (obviously). |
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165 // This is not static because in the future, maybe we want a flag |
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166 // in the profiler or something to choose between cputime, wall-time, |
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167 // user-time, system-time, ... |
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168 double query_time () const; |
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169 |
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170 // Add the time elapsed since last_time to the function we're currently in. |
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171 // This is called from two different positions, thus it is useful to have |
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172 // it as a seperate function. |
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173 void add_current_time (void); |
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174 |
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175 // No copying! |
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176 profile_data_accumulator (const profile_data_accumulator&); |
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177 profile_data_accumulator& operator = (const profile_data_accumulator&); |
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178 }; |
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179 |
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180 // The instance used. |
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181 extern OCTINTERP_API profile_data_accumulator profiler; |
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182 |
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183 // Helper macro to profile a block of code. |
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184 #define BEGIN_PROFILER_BLOCK(name) \ |
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185 { \ |
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186 profile_data_accumulator::enter pe (profiler, (name)); |
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187 #define END_PROFILER_BLOCK \ |
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188 } |
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189 |
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190 #endif |