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annotate src/profiler.cc @ 16088:b29b10fbb744 stable release-3-6-4

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Version 3.6.4 released. * configure.ac (AC_INIT): Version is now 3.6.4. (OCTAVE_RELEASE_DATE): Now 2013-02-21.
author John W. Eaton <jwe@octave.org>
date Thu, 21 Feb 2013 15:17:54 -0500
parents 06f706e92771
children
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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 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include <iostream>
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28
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29 #include "defun.h"
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30 #include "oct-time.h"
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31 #include "ov-struct.h"
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32 #include "pager.h"
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33 #include "profiler.h"
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34
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35 profile_data_accumulator::enter::enter (profile_data_accumulator& a,
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36 const std::string& f)
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37 : acc (a)
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38 {
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39 if (acc.is_active ())
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40 {
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41 fcn = f;
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42 acc.enter_function (fcn);
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43 }
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44 else
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45 fcn = "";
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46 }
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47
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48 profile_data_accumulator::enter::~enter ()
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49 {
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50 if (fcn != "")
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51 acc.exit_function (fcn);
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52 }
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53
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54 profile_data_accumulator::stats::stats ()
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55 : time (0.0), calls (0), recursive (false),
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56 parents (), children ()
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57 {}
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58
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59 octave_value
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60 profile_data_accumulator::stats::function_set_value (const function_set& list)
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61 {
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62 const octave_idx_type n = list.size ();
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63
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64 RowVector retval (n);
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65 octave_idx_type i = 0;
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66 for (function_set::const_iterator p = list.begin (); p != list.end (); ++p)
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67 {
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68 retval(i) = *p;
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69 ++i;
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70 }
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71 assert (i == n);
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72
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73 return retval;
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74 }
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75
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76 profile_data_accumulator::tree_node::tree_node (tree_node* p, octave_idx_type f)
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77 : parent (p), fcn_id (f), children (), time (0.0), calls (0)
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78 {}
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79
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80 profile_data_accumulator::tree_node::~tree_node ()
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81 {
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82 for (child_map::iterator i = children.begin (); i != children.end (); ++i)
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83 delete i->second;
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84 }
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85
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86 profile_data_accumulator::tree_node*
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87 profile_data_accumulator::tree_node::enter (octave_idx_type fcn)
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88 {
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89 tree_node* retval;
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90
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91 child_map::iterator pos = children.find (fcn);
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92 if (pos == children.end ())
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93 {
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94 retval = new tree_node (this, fcn);
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95 children[fcn] = retval;
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96 }
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97 else
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98 retval = pos->second;
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99
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100 ++retval->calls;
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101 return retval;
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102 }
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103
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104 profile_data_accumulator::tree_node*
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105 profile_data_accumulator::tree_node::exit (octave_idx_type fcn)
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106 {
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107 assert (parent);
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108 assert (fcn_id == fcn);
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109
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110 return parent;
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111 }
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112
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113 void
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114 profile_data_accumulator::tree_node::build_flat (flat_profile& data) const
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115 {
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116 // If this is not the top-level node, update profile entry for this function.
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117 if (fcn_id != 0)
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118 {
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119 stats& entry = data[fcn_id - 1];
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120
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121 entry.time += time;
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122 entry.calls += calls;
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123
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124 assert (parent);
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125 if (parent->fcn_id != 0)
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126 {
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127 entry.parents.insert (parent->fcn_id);
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128 data[parent->fcn_id - 1].children.insert (fcn_id);
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129 }
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130
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131 if (!entry.recursive)
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132 for (const tree_node* i = parent; i; i = i->parent)
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133 if (i->fcn_id == fcn_id)
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134 {
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135 entry.recursive = true;
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136 break;
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137 }
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138 }
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139
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140 // Recurse on children.
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141 for (child_map::const_iterator i = children.begin ();
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142 i != children.end (); ++i)
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143 i->second->build_flat (data);
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144 }
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145
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146 octave_value
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147 profile_data_accumulator::tree_node::get_hierarchical (double* total) const
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148 {
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149 /* Note that we don't generate the entry just for this node, but rather
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150 a struct-array with entries for all children. This way, the top-node
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151 (for which we don't want a real entry) generates already the final
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152 hierarchical profile data. */
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153
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154 const octave_idx_type n = children.size ();
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155
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156 Cell rv_indices (n, 1);
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157 Cell rv_times (n, 1);
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158 Cell rv_totals (n, 1);
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159 Cell rv_calls (n, 1);
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160 Cell rv_children (n, 1);
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161
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162 octave_idx_type i = 0;
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163 for (child_map::const_iterator p = children.begin ();
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164 p != children.end (); ++p)
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165 {
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166 const tree_node& entry = *p->second;
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167 double child_total = entry.time;
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168
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169 rv_indices(i) = octave_value (p->first);
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170 rv_times(i) = octave_value (entry.time);
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171 rv_calls(i) = octave_value (entry.calls);
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172 rv_children(i) = entry.get_hierarchical (&child_total);
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173 rv_totals(i) = octave_value (child_total);
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174
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175 if (total)
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176 *total += child_total;
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177
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178 ++i;
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179 }
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180 assert (i == n);
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181
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182 octave_map retval;
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183
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184 retval.assign ("Index", rv_indices);
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185 retval.assign ("SelfTime", rv_times);
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186 retval.assign ("TotalTime", rv_totals);
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187 retval.assign ("NumCalls", rv_calls);
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188 retval.assign ("Children", rv_children);
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189
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190 return retval;
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191 }
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192
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193 profile_data_accumulator::profile_data_accumulator ()
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194 : known_functions (), fcn_index (),
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195 enabled (false), call_tree (NULL), last_time (-1.0)
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196 {}
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197
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198 profile_data_accumulator::~profile_data_accumulator ()
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199 {
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200 if (call_tree)
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201 delete call_tree;
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202 }
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203
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204 void
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205 profile_data_accumulator::set_active (bool value)
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206 {
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207 if (value)
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208 {
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209 // Create a call-tree top-node if there isn't yet one.
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210 if (!call_tree)
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211 call_tree = new tree_node (NULL, 0);
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212
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213 // Let the top-node be the active one. This ensures we have a clean
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214 // fresh start collecting times.
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215 active_fcn = call_tree;
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216 }
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217 else
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218 {
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219 // Make sure we start with fresh timing if we're re-enabled later.
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220 last_time = -1.0;
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221 }
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222
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223 enabled = value;
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224 }
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225
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226 void
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227 profile_data_accumulator::enter_function (const std::string& fcn)
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228 {
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229 // The enter class will check and only call us if the profiler is active.
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230 assert (is_active ());
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231 assert (call_tree);
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232
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233 // If there is already an active function, add to its time before
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234 // pushing the new one.
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235 if (active_fcn != call_tree)
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236 add_current_time ();
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237
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238 // Map the function's name to its index.
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239 octave_idx_type fcn_idx;
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240 fcn_index_map::iterator pos = fcn_index.find (fcn);
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241 if (pos == fcn_index.end ())
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242 {
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243 known_functions.push_back (fcn);
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244 fcn_idx = known_functions.size ();
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245 fcn_index[fcn] = fcn_idx;
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246 }
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247 else
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248 fcn_idx = pos->second;
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249
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250 active_fcn = active_fcn->enter (fcn_idx);
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251 last_time = query_time ();
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252 }
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253
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254 void
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255 profile_data_accumulator::exit_function (const std::string& fcn)
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256 {
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257 assert (call_tree);
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258 assert (active_fcn != call_tree);
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259
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260 // Usually, if we are disabled this function is not even called. But the
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261 // call disabling the profiler is an exception. So also check here
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262 // and only record the time if enabled.
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263 if (is_active ())
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264 add_current_time ();
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265
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266 fcn_index_map::iterator pos = fcn_index.find (fcn);
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267 assert (pos != fcn_index.end ());
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268 active_fcn = active_fcn->exit (pos->second);
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269
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270 // If this was an "inner call", we resume executing the parent function
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271 // up the stack. So note the start-time for this!
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272 last_time = query_time ();
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273 }
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274
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275 void
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276 profile_data_accumulator::reset (void)
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277 {
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278 if (is_active ())
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279 {
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280 error ("Can't reset active profiler.");
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281 return;
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282 }
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283
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284 known_functions.clear ();
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285 fcn_index.clear ();
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286
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287 if (call_tree)
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288 {
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289 delete call_tree;
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290 call_tree = NULL;
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291 }
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292
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293 last_time = -1.0;
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294 }
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295
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296 octave_value
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297 profile_data_accumulator::get_flat (void) const
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298 {
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299 octave_value retval;
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300
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301 const octave_idx_type n = known_functions.size ();
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302
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303 flat_profile flat (n);
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304
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305 if (call_tree)
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306 {
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307 call_tree->build_flat (flat);
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308
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309 Cell rv_names (n, 1);
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310 Cell rv_times (n, 1);
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311 Cell rv_calls (n, 1);
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312 Cell rv_recursive (n, 1);
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313 Cell rv_parents (n, 1);
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314 Cell rv_children (n, 1);
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315
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316 for (octave_idx_type i = 0; i != n; ++i)
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317 {
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318 rv_names(i) = octave_value (known_functions[i]);
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319 rv_times(i) = octave_value (flat[i].time);
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320 rv_calls(i) = octave_value (flat[i].calls);
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321 rv_recursive(i) = octave_value (flat[i].recursive);
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322 rv_parents(i) = stats::function_set_value (flat[i].parents);
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323 rv_children(i) = stats::function_set_value (flat[i].children);
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324 }
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325
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326 octave_map m;
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327
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328 m.assign ("FunctionName", rv_names);
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329 m.assign ("TotalTime", rv_times);
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330 m.assign ("NumCalls", rv_calls);
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331 m.assign ("IsRecursive", rv_recursive);
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332 m.assign ("Parents", rv_parents);
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333 m.assign ("Children", rv_children);
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334
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335 retval = m;
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336 }
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337 else
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338 {
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339 static const char *fn[] =
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340 {
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341 "FunctionName",
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342 "TotalTime",
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343 "NumCalls",
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344 "IsRecursive",
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345 "Parents",
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346 "Children",
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347 0
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348 };
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349
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350 static octave_map m (dim_vector (0, 1), string_vector (fn));
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351
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352 retval = m;
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353 }
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354
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355 return retval;
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356 }
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357
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358 octave_value
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359 profile_data_accumulator::get_hierarchical (void) const
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360 {
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361 octave_value retval;
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362
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363 if (call_tree)
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364 retval = call_tree->get_hierarchical ();
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365 else
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366 {
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367 static const char *fn[] =
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368 {
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369 "Index",
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370 "SelfTime",
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371 "NumCalls",
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372 "Children",
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373 0
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374 };
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375
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376 static octave_map m (dim_vector (0, 1), string_vector (fn));
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377
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378 retval = m;
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379 }
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380
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381 return retval;
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382 }
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383
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384 double
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385 profile_data_accumulator::query_time (void) const
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386 {
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387 octave_time now;
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388
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389 // FIXME -- is this volatile declaration really needed?
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390 // See bug #34210 for additional details.
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391 volatile double dnow = now.double_value ();
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392
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393 return dnow;
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394 }
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395
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396 void
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397 profile_data_accumulator::add_current_time (void)
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398 {
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399 const double t = query_time ();
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400 assert (last_time >= 0.0 && last_time <= t);
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401
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402 assert (call_tree && active_fcn != call_tree);
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403 active_fcn->add_time (t - last_time);
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404 }
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diff changeset
405
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406 profile_data_accumulator profiler;
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407
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408 // Enable or disable the profiler data collection.
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409 DEFUN (__profiler_enable__, args, ,
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diff changeset
410 "-*- texinfo -*-\n\
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411 @deftypefn {Function File} __profiler_enable ()\n\
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412 Undocumented internal function.\n\
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diff changeset
413 @end deftypefn")
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414 {
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diff changeset
415 octave_value_list retval;
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416
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417 const int nargin = args.length ();
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418 if (nargin > 0)
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419 {
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420 if (nargin > 1)
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421 {
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422 print_usage ();
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423 return retval;
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diff changeset
424 }
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425
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426 profiler.set_active (args(0).bool_value ());
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427 }
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diff changeset
428
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diff changeset
429 retval(0) = profiler.is_active ();
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diff changeset
430
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431 return retval;
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432 }
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433
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434 // Clear all collected profiling data.
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435 DEFUN (__profiler_reset__, args, ,
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436 "-*- texinfo -*-\n\
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diff changeset
437 @deftypefn {Function File} __profiler_reset ()\n\
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438 Undocumented internal function.\n\
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439 @end deftypefn")
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440 {
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441 octave_value_list retval;
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442 const int nargin = args.length ();
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443
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444 if (nargin > 0)
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diff changeset
445 warning ("profiler_reset: ignoring extra arguments");
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446
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447 profiler.reset ();
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448
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449 return retval;
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450 }
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451
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452 // Query the timings collected by the profiler.
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453 DEFUN (__profiler_data__, args, nargout,
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454 "-*- texinfo -*-\n\
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455 @deftypefn {Function File} __profiler_data ()\n\
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456 Undocumented internal function.\n\
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457 @end deftypefn")
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458 {
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diff changeset
459 octave_value_list retval;
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460 const int nargin = args.length ();
ad9263d965dc First experimental profiler implementation with flat profile.
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461
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462 if (nargin > 0)
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463 warning ("profiler_data: ignoring extra arguments");
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464
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465 retval(0) = profiler.get_flat ();
a451ae847adb Collect hierarchical data profile.
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466 if (nargout > 1)
a451ae847adb Collect hierarchical data profile.
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467 retval(1) = profiler.get_hierarchical ();
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468
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diff changeset
469 return retval;
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ad9263d965dc First experimental profiler implementation with flat profile.
Daniel Kraft <d@domob.eu>
parents:
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