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Collect hierarchical data profile. * profiler.h: Retructure whole data collection. * profiler.cc: Ditto for implementation.
author Daniel Kraft <d@domob.eu>
date Thu, 11 Aug 2011 17:55:23 +0200
parents 5d18231eee00
children 05941540287c
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1 /*
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2
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3 Copyright (C) 2011 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 <cstddef>
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28 #include <iostream>
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29
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30 #include "defun.h"
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31 #include "oct-time.h"
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32 #include "ov-struct.h"
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33 #include "pager.h"
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34 #include "profiler.h"
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35
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36 profile_data_accumulator::enter::enter (profile_data_accumulator& a,
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37 const std::string& f)
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38 : acc (a)
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39 {
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40 if (acc.is_active ())
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41 {
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42 fcn = f;
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43 acc.enter_function (fcn);
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44 }
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45 else
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46 fcn = "";
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47 }
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48
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49 profile_data_accumulator::enter::~enter ()
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50 {
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51 if (fcn != "")
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52 acc.exit_function (fcn);
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53 }
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54
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55 profile_data_accumulator::stats::stats ()
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56 : time (0.0), calls (0), recursive (false),
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57 parents (), children ()
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58 {}
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59
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60 octave_value
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61 profile_data_accumulator::stats::function_set_value (const function_set& list)
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62 {
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63 const octave_idx_type n = list.size ();
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64
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65 RowVector retval (n);
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66 octave_idx_type i = 0;
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67 for (function_set::const_iterator p = list.begin (); p != list.end (); ++p)
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68 {
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69 retval(i) = *p;
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70 ++i;
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71 }
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72 assert (i == n);
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73
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74 return retval;
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75 }
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76
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77 profile_data_accumulator::tree_node::tree_node (tree_node* p, octave_idx_type f)
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78 : parent (p), fcn_id (f), children (), time (0.0), calls (0)
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79 {}
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80
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81 profile_data_accumulator::tree_node::~tree_node ()
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82 {
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83 for (child_map::iterator i = children.begin (); i != children.end (); ++i)
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84 delete i->second;
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85 }
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86
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87 profile_data_accumulator::tree_node*
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88 profile_data_accumulator::tree_node::enter (octave_idx_type fcn)
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89 {
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90 tree_node* retval;
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91
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92 child_map::iterator pos = children.find (fcn);
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93 if (pos == children.end ())
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94 {
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95 retval = new tree_node (this, fcn);
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96 children[fcn] = retval;
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97 }
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98 else
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99 retval = pos->second;
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100
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101 ++retval->calls;
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102 return retval;
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103 }
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104
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105 profile_data_accumulator::tree_node*
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106 profile_data_accumulator::tree_node::exit (octave_idx_type fcn)
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107 {
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108 assert (parent);
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109 assert (fcn_id == fcn);
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110
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111 return parent;
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112 }
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113
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114 void
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115 profile_data_accumulator::tree_node::build_flat (flat_profile& data) const
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116 {
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117 // If this is not the top-level node, update profile entry for this function.
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118 if (fcn_id != 0)
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119 {
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120 stats& entry = data[fcn_id - 1];
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121
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122 entry.time += time;
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123 entry.calls += calls;
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124
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125 assert (parent);
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126 if (parent->fcn_id != 0)
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127 {
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128 entry.parents.insert (parent->fcn_id);
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129 data[parent->fcn_id - 1].children.insert (fcn_id);
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130 }
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131
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132 if (!entry.recursive)
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133 for (const tree_node* i = parent; i; i = i->parent)
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134 if (i->fcn_id == fcn_id)
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135 {
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136 entry.recursive = true;
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137 break;
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138 }
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139 }
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140
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141 // Recurse on children.
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142 for (child_map::const_iterator i = children.begin ();
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143 i != children.end (); ++i)
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144 i->second->build_flat (data);
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145 }
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146
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147 octave_value
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148 profile_data_accumulator::tree_node::get_hierarchical (void) const
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149 {
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150 /* Note that we don't generate the entry just for this node, but rather
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151 a struct-array with entries for all children. This way, the top-node
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152 (for which we don't want a real entry) generates already the final
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153 hierarchical profile data. */
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154
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155 const octave_idx_type n = children.size ();
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156
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157 Cell rv_indices (n, 1);
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158 Cell rv_times (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
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168 rv_indices(i) = octave_value (p->first);
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169 rv_times(i) = octave_value (entry.time);
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170 rv_calls(i) = octave_value (entry.calls);
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171 rv_children(i) = entry.get_hierarchical ();
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172
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173 ++i;
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174 }
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175 assert (i == n);
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176
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177 Octave_map retval;
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178
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179 retval.assign ("Index", rv_indices);
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180 retval.assign ("SelfTime", rv_times);
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181 retval.assign ("NumCalls", rv_calls);
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182 retval.assign ("Children", rv_children);
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183
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184 return retval;
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185 }
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186
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187 profile_data_accumulator::profile_data_accumulator ()
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188 : known_functions (), fcn_index (),
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189 enabled (false), call_tree (NULL), last_time (-1.0)
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190 {}
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191
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192 profile_data_accumulator::~profile_data_accumulator ()
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193 {
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194 if (call_tree)
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195 delete call_tree;
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196 }
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197
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198 void
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199 profile_data_accumulator::set_active (bool value)
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200 {
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201 if (value)
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202 {
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203 // Create a call-tree top-node if there isn't yet one.
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204 if (!call_tree)
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205 call_tree = new tree_node (NULL, 0);
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206
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207 // Let the top-node be the active one. This ensures we have a clean
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208 // fresh start collecting times.
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209 active_fcn = call_tree;
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210 }
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211 else
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212 {
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213 // Make sure we start with fresh timing if we're re-enabled later.
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214 last_time = -1.0;
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215 }
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216
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217 enabled = value;
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218 }
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219
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220 void
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221 profile_data_accumulator::enter_function (const std::string& fcn)
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222 {
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223 // The enter class will check and only call us if the profiler is active.
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224 assert (is_active ());
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225 assert (call_tree);
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226
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227 // If there is already an active function, add to its time before
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228 // pushing the new one.
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229 if (active_fcn != call_tree)
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230 add_current_time ();
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231
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232 // Map the function's name to its index.
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233 octave_idx_type fcn_idx;
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234 fcn_index_map::iterator pos = fcn_index.find (fcn);
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235 if (pos == fcn_index.end ())
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236 {
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237 known_functions.push_back (fcn);
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238 fcn_idx = known_functions.size ();
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239 fcn_index[fcn] = fcn_idx;
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240 }
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241 else
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242 fcn_idx = pos->second;
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243
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244 active_fcn = active_fcn->enter (fcn_idx);
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245 last_time = query_time ();
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246 }
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247
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248 void
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249 profile_data_accumulator::exit_function (const std::string& fcn)
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250 {
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251 assert (call_tree);
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252 assert (active_fcn != call_tree);
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253
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254 // Usually, if we are disabled this function is not even called. But the
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255 // call disabling the profiler is an exception. So also check here
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256 // and only record the time if enabled.
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257 if (is_active ())
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258 add_current_time ();
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259
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260 fcn_index_map::iterator pos = fcn_index.find (fcn);
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261 assert (pos != fcn_index.end ());
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262 active_fcn = active_fcn->exit (pos->second);
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263
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264 // If this was an "inner call", we resume executing the parent function
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265 // up the stack. So note the start-time for this!
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266 last_time = query_time ();
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267 }
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268
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269 void
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270 profile_data_accumulator::reset (void)
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271 {
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272 if (is_active ())
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273 {
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274 error ("Can't reset active profiler.");
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275 return;
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276 }
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277
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278 known_functions.clear ();
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279 fcn_index.clear ();
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280
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281 if (call_tree)
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282 {
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283 delete call_tree;
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284 call_tree = NULL;
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285 }
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286
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287 last_time = -1.0;
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288 }
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289
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290 octave_value
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291 profile_data_accumulator::get_flat (void) const
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292 {
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293 const octave_idx_type n = known_functions.size ();
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294
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295 flat_profile flat (n);
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296 assert (call_tree);
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297 call_tree->build_flat (flat);
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298
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299 Cell rv_names (n, 1);
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300 Cell rv_times (n, 1);
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301 Cell rv_calls (n, 1);
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302 Cell rv_recursive (n, 1);
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303 Cell rv_parents (n, 1);
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304 Cell rv_children (n, 1);
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305
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306 for (octave_idx_type i = 0; i != n; ++i)
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307 {
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308 rv_names(i) = octave_value (known_functions[i]);
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309 rv_times(i) = octave_value (flat[i].time);
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310 rv_calls(i) = octave_value (flat[i].calls);
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311 rv_recursive(i) = octave_value (flat[i].recursive);
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312 rv_parents(i) = stats::function_set_value (flat[i].parents);
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313 rv_children(i) = stats::function_set_value (flat[i].children);
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314 }
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315
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316 Octave_map retval;
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317
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318 retval.assign ("FunctionName", rv_names);
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319 retval.assign ("TotalTime", rv_times);
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320 retval.assign ("NumCalls", rv_calls);
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321 retval.assign ("IsRecursive", rv_recursive);
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322 retval.assign ("Parents", rv_parents);
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323 retval.assign ("Children", rv_children);
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324
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325 return retval;
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326 }
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327
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328 octave_value
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329 profile_data_accumulator::get_hierarchical (void) const
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330 {
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331 assert (call_tree);
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332 return call_tree->get_hierarchical ();
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333 }
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334
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335 double
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336 profile_data_accumulator::query_time (void) const
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337 {
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338 octave_time now;
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339 return now.double_value ();
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340 }
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341
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342 void
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343 profile_data_accumulator::add_current_time (void)
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344 {
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345 const double t = query_time ();
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346 assert (last_time >= 0.0 && last_time <= t);
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347
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348 assert (call_tree && active_fcn != call_tree);
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349 active_fcn->add_time (t - last_time);
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350 }
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351
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352 profile_data_accumulator profiler;
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353
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354 // Enable or disable the profiler data collection.
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355 DEFUN (__profiler_enable, args, ,
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356 "-*- texinfo -*-\n\
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357 @deftypefn {Function File} __profiler_enable ()\n\
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358 Undocumented internal function.\n\
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359 @end deftypefn")
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360 {
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361 octave_value_list retval;
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362
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363 const int nargin = args.length ();
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364 if (nargin > 0)
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365 {
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366 if (nargin > 1)
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367 {
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368 print_usage ();
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369 return retval;
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370 }
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371
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372 profiler.set_active (args(0).bool_value ());
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373 }
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374
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375 retval(0) = profiler.is_active ();
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376
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377 return retval;
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378 }
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379
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380 // Clear all collected profiling data.
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381 DEFUN (__profiler_reset, args, ,
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382 "-*- texinfo -*-\n\
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383 @deftypefn {Function File} __profiler_reset ()\n\
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384 Undocumented internal function.\n\
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385 @end deftypefn")
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386 {
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387 octave_value_list retval;
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388 const int nargin = args.length ();
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389
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390 if (nargin > 0)
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391 warning ("profiler_reset: ignoring extra arguments");
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392
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393 profiler.reset ();
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394
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395 return retval;
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396 }
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397
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398 // Query the timings collected by the profiler.
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399 DEFUN (__profiler_data, args, nargout,
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400 "-*- texinfo -*-\n\
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401 @deftypefn {Function File} __profiler_data ()\n\
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402 Undocumented internal function.\n\
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403 @end deftypefn")
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404 {
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405 octave_value_list retval;
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406 const int nargin = args.length ();
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407
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408 if (nargin > 0)
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409 warning ("profiler_data: ignoring extra arguments");
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410
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411 retval(0) = profiler.get_flat ();
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412 if (nargout > 1)
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413 retval(1) = profiler.get_hierarchical ();
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414
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415 return retval;
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416 }