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1 /* |
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2 * LIBOIL - Library of Optimized Inner Loops |
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3 * Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org> |
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4 * All rights reserved. |
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5 * |
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6 * Redistribution and use in source and binary forms, with or without |
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7 * modification, are permitted provided that the following conditions |
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8 * are met: |
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9 * 1. Redistributions of source code must retain the above copyright |
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10 * notice, this list of conditions and the following disclaimer. |
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11 * 2. Redistributions in binary form must reproduce the above copyright |
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12 * notice, this list of conditions and the following disclaimer in the |
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13 * documentation and/or other materials provided with the distribution. |
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14 * |
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15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
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19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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25 * POSSIBILITY OF SUCH DAMAGE. |
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26 */ |
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27 //Portions Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. |
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28 |
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29 #ifdef HAVE_CONFIG_H |
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30 #include "config.h" |
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31 #endif |
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32 #include <liboil/liboilfunction.h> |
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33 #include <liboil/liboildebug.h> |
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34 #include <liboil/liboilcpu.h> |
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35 #include <liboil/liboilfault.h> |
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36 #include <liboil/liboilutils.h> |
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37 |
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38 #ifdef HAVE_UNISTD_H |
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39 #include <unistd.h> |
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40 #endif |
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41 #include <fcntl.h> |
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42 #include <stdlib.h> |
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43 #include <string.h> |
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44 #include <stdio.h> |
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45 #include <setjmp.h> |
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46 #include <signal.h> |
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47 #ifdef HAVE_SYS_TIME_H |
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48 #include <sys/time.h> |
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49 #endif |
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50 #include <time.h> |
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51 |
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52 #if defined(__FreeBSD__) |
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53 #include <sys/types.h> |
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54 #include <sys/sysctl.h> |
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55 #endif |
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56 |
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57 #ifdef __sun |
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58 #include <sys/auxv.h> |
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59 #endif |
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60 |
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61 |
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62 |
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63 /** |
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64 * SECTION:liboilcpu |
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65 * @title: CPU |
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66 * @short_description: Check the capabilities of the current CPU |
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67 * |
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68 */ |
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69 |
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70 //void oil_cpu_detect_arch(void); |
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71 |
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72 unsigned long oil_cpu_flags; |
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73 |
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74 extern unsigned long (*_oil_profile_stamp)(void); |
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75 |
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76 #ifdef HAVE_GETTIMEOFDAY |
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77 static unsigned long |
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78 oil_profile_stamp_gtod (void) |
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79 { |
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80 struct timeval tv; |
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81 gettimeofday(&tv,NULL); |
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82 return 1000000*(unsigned long)tv.tv_sec + (unsigned long)tv.tv_usec; |
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83 } |
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84 #endif |
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85 |
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86 #if defined(HAVE_CLOCK_GETTIME) && defined(HAVE_MONOTONIC_CLOCK) |
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87 static unsigned long |
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88 oil_profile_stamp_clock_gettime (void) |
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89 { |
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90 struct timespec ts; |
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91 clock_gettime (CLOCK_MONOTONIC, &ts); |
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92 return 1000000000*ts.tv_sec + ts.tv_nsec; |
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93 } |
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94 #endif |
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95 |
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96 static unsigned long |
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97 oil_profile_stamp_zero (void) |
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98 { |
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99 return 0; |
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100 } |
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101 |
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102 #ifdef __SYMBIAN32__ |
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103 |
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104 #endif |
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105 void |
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106 _oil_cpu_init (void) |
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107 { |
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108 const char *envvar; |
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109 |
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110 oil_cpu_detect_arch(); |
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111 |
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112 envvar = getenv ("OIL_CPU_FLAGS"); |
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113 if (envvar != NULL) { |
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114 char *end = NULL; |
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115 unsigned long flags; |
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116 |
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117 flags = strtoul (envvar, &end, 0); |
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118 if (end > envvar) { |
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119 oil_cpu_flags = flags; |
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120 } |
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121 OIL_INFO ("cpu flags from environment %08lx", oil_cpu_flags); |
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122 } |
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123 |
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124 OIL_INFO ("cpu flags %08lx", oil_cpu_flags); |
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125 |
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126 #if defined(HAVE_CLOCK_GETTIME) && defined(HAVE_MONOTONIC_CLOCK) |
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127 if (_oil_profile_stamp == NULL) { |
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128 _oil_profile_stamp = oil_profile_stamp_clock_gettime; |
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129 OIL_INFO("Using clock_gettime() as a timestamp function."); |
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130 } |
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131 #endif |
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132 |
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133 #ifdef HAVE_GETTIMEOFDAY |
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134 if (_oil_profile_stamp == NULL) { |
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135 _oil_profile_stamp = oil_profile_stamp_gtod; |
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136 OIL_WARNING("Using gettimeofday() as a timestamp function."); |
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137 } |
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138 #endif |
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139 if (_oil_profile_stamp == NULL) { |
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140 _oil_profile_stamp = oil_profile_stamp_zero; |
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141 OIL_ERROR("No timestamping function. This is kinda bad."); |
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142 } |
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143 } |
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144 |
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145 /** |
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146 * oil_cpu_get_flags: |
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147 * |
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148 * Returns a bitmask containing the available CPU features. |
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149 * |
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150 * Returns: the CPU features. |
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151 */ |
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152 #ifdef __SYMBIAN32__ |
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153 EXPORT_C |
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154 #endif |
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155 unsigned int |
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156 oil_cpu_get_flags (void) |
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157 { |
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158 return oil_cpu_flags; |
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159 } |
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160 |
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161 |
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162 #if 0 |
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163 /** |
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164 * oil_cpu_get_ticks_per_second: |
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165 * |
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166 * Returns the estimated number of ticks per second. This feature |
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167 * is currently unimplemented. |
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168 * |
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169 * This function may take several milliseconds or more to execute |
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170 * in order to calculate a good estimate of the number of ticks (as |
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171 * measured by the profiling functions) per second. Note that the |
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172 * number of ticks per second is often dependent on the CPU frequency, |
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173 * which can change dynamically. Thus the value returned by this |
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174 * function may be incorrect as soon as it is returned. |
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175 * |
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176 * Returns: a double |
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177 */ |
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178 double |
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179 oil_cpu_get_ticks_per_second (void) |
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180 { |
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181 return _oil_ticks_per_second; |
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182 } |
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183 #endif |
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184 |
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185 #ifdef __SYMBIAN32__ |
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186 EXPORT_C |
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187 #endif |
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188 double |
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189 oil_cpu_get_frequency (void) |
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190 { |
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191 #if defined(__linux__) |
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192 int freq; |
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193 if (get_file_int ("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq", |
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194 &freq)) { |
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195 return 1000.0 * freq; |
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196 } |
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197 return 0; |
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198 #else |
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199 return 0; |
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200 #endif |
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201 } |
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202 |