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annotate packages/kernel/current/tests/clockcnv.cxx @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents eb9fd8c04db3
children d2c90368aeef
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1 //==========================================================================
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2 //
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3 // clockcnv.cxx
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4 //
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5 // Clock Converter test
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6 //
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7 //==========================================================================
208
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8 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
64
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): hmt
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44 // Contributors: hmt
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45 // Date: 2000-01-24
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46 // Description: Tests the Kernel Real Time Clock Converter subsystem
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47 //
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48 //####DESCRIPTIONEND####
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49
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50 #include <pkgconf/kernel.h>
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51
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52 #include <cyg/kernel/clock.hxx>
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53 #include <cyg/kernel/thread.hxx>
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54
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55 #include <cyg/infra/testcase.h>
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56
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57 #include <cyg/kernel/clock.inl>
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58 #include <cyg/kernel/thread.inl>
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59
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60 #ifdef CYGVAR_KERNEL_COUNTERS_CLOCK
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61
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62 externC void diag_printf(const char *, ...);
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63
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64 static void null_printf(const char *, ...)
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65 { /* nothing */ }
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66
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67 #define PRINTF0 diag_printf
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68 #define nPRINTF0 null_printf
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69
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70 #define nPRINTF1 diag_printf
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71 #define PRINTF1 null_printf
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72
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73 #define nPRINTF2 diag_printf
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74 #define PRINTF2 null_printf
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75
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76
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77 #define NTHREADS 1
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78 #include "testaux.hxx"
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79
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80 static struct { cyg_uint32 ns; double scale; } ns_tickers[] = {
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81 { 70000000, 7.0 }, // 7cS
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82 { 50000000, 5.0 }, // 5cS
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83 { 45000000, 4.5 }, // 4.5cS
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84 { 30000000, 3.0 }, // 3cS
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85 { 20000000, 2.0 }, // 2cS
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86 { 10000000, 1.0 }, // 1cS - no change
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87 { 5000000, 0.5 }, // 1/2 a cS
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88 { 4900000, 0.49 }, // a bit below
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89 { 3333333, 0.3333333 }, // 1/3 cS
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90 { 1250000, 0.125 }, // 800Hz
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91 { 1000000, 0.1 }, // 1000Hz
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92 { 909090, 0.0909090 }, // 1100Hz
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93 { 490000, 0.049 }, // 490uS
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94 { 333333, 0.0333333 }, // 1/30 cS, 1/3mS
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95 { 49000, 0.0049 }, // 49uS
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96 { 33333, 0.0033333 }, // 1/30 mS
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97 { 4900, 0.00049 }, // 4.9uS
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98 // now some outlandish ones
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99 { 170, 0.000017 }, // 170nS
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100 { 11, 0.0000011 }, // 11nS
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101 { 1000000000u, 100.0 }, // one second
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102 { 1234567777u, 123.4567777 }, // 1.234... seconds
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103 { 4294967291u, 429.4967291 }, // 4.3 seconds, nearly maxint.
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104 // now some which are prime in the nS per tick field
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105 { 909091, 0.0909091 }, // also 1100Hz - but 909091 is a prime!
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106 // and some eye-pleasing primes from the www - if they're not actually
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107 // prime, don't blame me. http://www.rsok.com/~jrm/printprimes.html
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108 { 1000003, 0.1000003 },
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109 { 1477771, 0.1477771 },
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110 { 2000003, 0.2000003 },
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111 { 2382001, 0.2382001 },
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112 { 3333133, 0.3333133 },
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113 { 3999971, 0.3999971 },
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114 { 5555591, 0.5555591 },
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115 { 6013919, 0.6013919 },
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116 // That's enough
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117 };
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118
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119 static void entry0( CYG_ADDRWORD data )
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120 {
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121 // First just try it with the clock as default:
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122 Cyg_Clock *rtc = Cyg_Clock::real_time_clock;
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123
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124 Cyg_Clock::converter cv, rcv;
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125 Cyg_Clock::cyg_resolution res;
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126
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127 unsigned int counter = 0;
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128 unsigned int skipped = 0;
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129
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130 unsigned int i;
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131 for ( i = 0; i < sizeof( ns_tickers )/sizeof( ns_tickers[0] ); i++ ) {
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132
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133 unsigned int lcounter = 0;
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134 unsigned int lskipped = 0;
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135
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136 rtc->get_other_to_clock_converter( ns_tickers[i].ns, &cv );
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137 rtc->get_clock_to_other_converter( ns_tickers[i].ns, &rcv );
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138
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139 PRINTF1( "ns per tick: %d\n", ns_tickers[i].ns );
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140 PRINTF1( " converter: * %d / %d * %d / %d\n",
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141 (int)cv.mul1, (int)cv.div1, (int)cv.mul2,(int) cv.div2 );
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142 PRINTF1( " reverser: * %d / %d * %d / %d\n",
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143 (int)rcv.mul1, (int)rcv.div1, (int)rcv.mul2, (int)rcv.div2 );
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144
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145 double d = 1.0;
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146 d *= (double)cv.mul1;
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147 d /= (double)cv.div1;
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148 d *= (double)cv.mul2;
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149 d /= (double)cv.div2;
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150 d *= (double)rcv.mul1;
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151 d /= (double)rcv.div1;
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152 d *= (double)rcv.mul2;
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153 d /= (double)rcv.div2;
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154 PRINTF1( " composite product %d.%d\n",
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155 (int)d, ((int)(d * 1000000) % 1000000 ) );
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156 d -= 1.0;
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157 CYG_TEST_CHECK( d < +0.0001, "Overflow in composite product" );
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158 CYG_TEST_CHECK( d > -0.0001, "Underflow in composite product" );
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159
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160 res = rtc->get_resolution();
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161
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162 double factor_other_to_clock;
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163 double factor_clock_to_other;
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164
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165 // res.dividend/res.divisor is the number of nS in a system
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166 // clock tick. So:
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167 d = (double)res.dividend/(double)res.divisor;
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168
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169 factor_other_to_clock = ns_tickers[i].scale * 1.0e7 / d ;
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170 factor_clock_to_other = d / (ns_tickers[i].scale * 1.0e7);
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171
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172 unsigned int j;
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173 for ( j = 1; j < 100; j++ ) {
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174 cyg_uint64 delay;
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175 if (cyg_test_is_simulator)
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176 j += 30; // test fewer values
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177 /* tr.b..m..k.. */
84
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178
101
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179 #ifdef CYGPKG_HAL_V85X_V850_CEB
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180 j += 30; // test fewer values
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181 #endif
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182
64
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183 for ( delay = j; delay < 1000000000000ll; delay *= 10 ) {
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184 // get the converted result
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185 cyg_uint64 result = Cyg_Clock::convert( delay, &cv );
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186
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187 counter++; lcounter++;
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188 if ( (double)delay * (double)cv.mul1 > 1.6e+19 ||
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189 (double)delay * (double)rcv.mul1 > 1.6e+19 ) {
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190 // in silly territory now, give up.
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191 // (that's MAXINT squared, approx.)
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192 skipped++; lskipped++;
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193 continue; // so the counter is accurate
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194 }
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195
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196 PRINTF2( "delay %x%08x to result %x%08x\n",
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197 (int)(delay >> 32), (int)delay,
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198 (int)(result >> 32), (int)result );
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199
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200 // get what it should be in double maths
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201 double delta = factor_other_to_clock * (double)delay;
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202 if ( delta > 1000.0 ) {
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203 delta = (double)result - delta;
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204 delta /= (double)result;
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205 CYG_TEST_CHECK( delta <= +0.01,
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206 "Proportional overflow in conversion to" );
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207 CYG_TEST_CHECK( delta >= -0.01,
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208 "Proportional underflow in conversion to" );
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209 }
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210 else {
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211 cyg_uint64 lo = (cyg_uint64)(delta); // assume TRUNCATION
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212 cyg_uint64 hi = lo + 1;
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213 CYG_TEST_CHECK( hi >= result,
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214 "Range overflow in conversion to" );
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215 CYG_TEST_CHECK( lo <= result,
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216 "Range underflow in conversion to" );
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217 }
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218
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219 // get the converted result
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220 result = Cyg_Clock::convert( delay, &rcv );
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221
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222 PRINTF2( "delay %x%08x from result %x%08x\n",
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223 (int)(delay >> 32), (int)delay,
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224 (int)(result >> 32), (int)result );
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225
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226 // get what it should be in double maths
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227 delta = factor_clock_to_other * (double)delay;
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228 if ( delta > 1000.0 ) {
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229 delta = (double)result - delta;
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230 delta /= (double)result;
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231 CYG_TEST_CHECK( delta <= +0.01,
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232 "Proportional overflow in conversion from" );
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233 CYG_TEST_CHECK( delta >= -0.01,
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234 "Proportional underflow in conversion from" );
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235 }
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236 else {
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237 cyg_uint64 lo = (cyg_uint64)(delta); // assume TRUNCATION
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238 cyg_uint64 hi = lo + 1;
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239 CYG_TEST_CHECK( hi >= result,
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240 "Range overflow in conversion from" );
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241 CYG_TEST_CHECK( lo <= result,
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242 "Range underflow in conversion from" );
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243 }
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244
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245 if (cyg_test_is_simulator)
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246 break;
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247 }
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248 }
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249 PRINTF0( "INFO:<%d nS/tick: tested %d values, skipped %d because of overflow>\n",
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250 ns_tickers[i].ns, lcounter, lskipped );
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251 }
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252
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253 PRINTF0( "INFO:<tested %d values, total skipped %d because of overflow>\n",
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254 counter, skipped );
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255
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256 CYG_TEST_PASS_FINISH("ClockCnv OK");
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257 }
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258
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259 void clockcnv_main( void )
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260 {
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261 CYG_TEST_INIT();
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262 new_thread(entry0, (CYG_ADDRWORD)&thread_obj[0]);
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263 Cyg_Scheduler::start();
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264 }
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265
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266 externC void
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267 cyg_start( void )
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268 {
130
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269 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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270 cyg_hal_invoke_constructors();
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271 #endif
64
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272 clockcnv_main();
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273 }
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274
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275 #else // def CYGVAR_KERNEL_COUNTERS_CLOCK
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276
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277 externC void
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278 cyg_start( void )
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279 {
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280 CYG_TEST_INIT();
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281 CYG_TEST_NA( "Kernel real-time clock disabled");
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282 }
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283
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284 #endif // def CYGVAR_KERNEL_COUNTERS_CLOCK
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285
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286 // EOF clockcnv.cxx