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annotate src/profiler.cc @ 12783:ad9263d965dc

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First experimental profiler implementation with flat profile. * profiler.cc: New file. * profiler.h: New file. * Makefile.am: Include new files in build process. * oct-parse.yy (frob_function): Store location of function parsed. * ov-fcn.h (octave_function::profiler_name): New method. * ov-builtin.cc (octave_builtin::do_multi_index_op): Record timings in profiler. * ov-mex-fcn.cc (octave_mex_function::do_multi_index_op): Ditto. * ov-usr-fcn.cc (octave_user_script::do_multi_index_op): Ditto. (octave_user_function::do_multi_index_op): Ditto. (octave_user_function::octave_user_function): Initialize location_line/column. (octave_user_function::profiler_name): New method. * ov-usr-fcn.h (octave_user_function): New variables location_line, location column and new method stash_fcn_location to set them. * pt-fcn-handle.cc (tree_anon_fcn_handle::rvalue1): Store location.
author Daniel Kraft <d@domob.eu>
date Thu, 30 Jun 2011 20:04:34 +0200
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children c499d54796d6
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12783
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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 <iostream>
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28
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29 #include "Cell.h"
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30 #include "defun.h"
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31 #include "oct-time.h"
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32 #include "ov-fcn.h"
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33 #include "ov-struct.h"
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34 #include "pager.h"
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35 #include "profiler.h"
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36
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37 profile_data_accumulator::enter::enter (profile_data_accumulator& a,
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38 const octave_function& f)
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39 : acc (a)
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40 {
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41 if (acc.is_active ())
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42 {
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43 fcn = &f;
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44 acc.enter_function (*fcn);
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45 }
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46 else
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47 fcn = NULL;
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48 }
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49
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50 profile_data_accumulator::enter::~enter ()
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51 {
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52 if (fcn)
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53 acc.exit_function (*fcn);
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54 }
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55
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56 profile_data_accumulator::profile_data_accumulator ()
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57 : enabled (false), call_stack (), times (), last_time (-1.0)
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58 {}
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59
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60 void
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61 profile_data_accumulator::set_active (bool value)
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62 {
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63 // If we enable, clear the call-stack. This ensures we freshly start
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64 // with collecting times now.
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65 if (value)
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66 {
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67 while (!call_stack.empty ())
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68 call_stack.pop ();
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69 }
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70
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71 enabled = value;
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72 }
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73
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74 void
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75 profile_data_accumulator::enter_function (const octave_function& fcn)
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76 {
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77 // The enter class will check and only call us if the profiler is active.
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78 assert (is_active ());
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79
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80 // If there is already an active function, add to its time before
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81 // pushing the new one.
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82 if (!call_stack.empty ())
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83 add_current_time ();
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84
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85 call_stack.push (&fcn);
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86 last_time = query_time ();
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87 }
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88
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89 void
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90 profile_data_accumulator::exit_function (const octave_function& fcn)
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91 {
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92 assert (!call_stack.empty ());
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93 assert (&fcn == call_stack.top ());
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94
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95 // Usually, if we are disabled this function is not even called. But the
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96 // call disabling the profiler is an exception. So also check here
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97 // and only record the time if enabled.
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98 if (is_active ())
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99 add_current_time ();
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100
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101 call_stack.pop ();
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102
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103 // If this was an "inner call", we resume executing the parent function
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104 // up the stack. So note the start-time for this!
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105 last_time = query_time ();
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106 }
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107
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108 void
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109 profile_data_accumulator::reset (void)
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110 {
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111 if (is_active ())
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112 {
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113 error ("Can't reset active profiler.");
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114 return;
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115 }
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116
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117 times.clear ();
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118 last_time = -1.0;
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119 }
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120
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121 Cell
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122 profile_data_accumulator::get_data (void) const
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123 {
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124 const int n = times.size ();
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125
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126 Cell result (1, n);
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127 int i = 0;
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128 for (timing_map::const_iterator p = times.begin (); p != times.end (); ++p)
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129 {
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130 octave_scalar_map entry;
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131
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132 entry.contents ("name") = octave_value (p->first);
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133 entry.contents ("time") = octave_value (p->second);
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134
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135 result (i++) = entry;
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136 }
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137 assert (i == n);
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138
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139 return result;
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140 }
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141
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142 double
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143 profile_data_accumulator::query_time (void) const
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144 {
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145 octave_time now;
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146 return now.double_value ();
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147 }
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148
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149 void
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150 profile_data_accumulator::add_current_time (void)
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151 {
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152 const double t = query_time ();
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153 assert (last_time >= 0.0 && last_time <= t);
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154
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155 assert (!call_stack.empty ());
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156 const std::string name = call_stack.top ()->profiler_name ();
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157
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158 // If the key is not yet present in the map, it is constructed
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159 // with default value 0.
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160 times[name] += t - last_time;
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161 }
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162
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163 profile_data_accumulator profiler;
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164
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165 DEFUN (profiler_enable, args, nargout,
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166 "-*- texinfo -*-\n\
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167 @deftypefn {Built-in Function} {} profiler_enable (enabled)\n\
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168 Enable or disable the profiler data collection.\n\
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169 @end deftypefn")
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170 {
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171 // If there is an output argument, return current (if we change the old)
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172 // status of the profiler.
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173 octave_value_list result;
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174 if (nargout > 0)
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175 {
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176 if (nargout > 1)
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177 error ("profiler_enable: too many output arguments requested");
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178
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179 result(0) = profiler.is_active ();
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180 }
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181
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182 // If there is an input argument, set the status.
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183 const int nargin = args.length ();
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184 if (nargin > 0)
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185 {
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186 if (nargin > 1)
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187 error ("profiler_enable: too many arguments specified");
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188
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189 profiler.set_active (args(0).bool_value ());
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190 }
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191
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192 return result;
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193 }
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194
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195 DEFUN (profiler_reset, args, nargout,
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196 "-*- texinfo -*-\n\
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197 @deftypefn {Built-in Function} {} profiler_reset ()\n\
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198 Clear all collected profiling data.\n\
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199 @end deftypefn")
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200 {
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201 octave_value_list result;
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202 const int nargin = args.length ();
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203
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204 if (nargin > 0)
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205 error ("profiler_reset: no arguments expected");
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206 if (nargout > 0)
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207 error ("profiler_reset: no output argument possible");
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208
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209 profiler.reset ();
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210
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211 return result;
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212 }
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213
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214 DEFUN (profiler_data, args, nargout,
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215 "-*- texinfo -*-\n\
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216 @deftypefn {Built-in Function} {} data = profiler_data ()\n\
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217 Query the timings collected by the profiler.\n\
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218 @end deftypefn")
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219 {
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220 octave_value_list result;
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221 const int nargin = args.length ();
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222
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223 if (nargin > 0)
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224 error ("profiler_data: no arguments expected");
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225 if (nargout != 1)
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226 error ("profiler_reset: expected exactly one output argument");
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227
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228 result(0) = profiler.get_data ();
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229
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230 return result;
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231 }