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annotate packages/kernel/current/tests/clockcnv.cxx @ 84:489eb5632bc3 ecos-sw-2000-04-28

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Merge from eCos master repository on 2000-04-28-18:44:39-BST
author jlarmour
date Fri, 28 Apr 2000 18:18:36 +0000
parents bf00f99aec69
children c37d3a9e1b28
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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 //==========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //==========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): hmt
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35 // Contributors: hmt
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36 // Date: 2000-01-24
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37 // Description: Tests the Kernel Real Time Clock Converter subsystem
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38 //
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39 //####DESCRIPTIONEND####
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40
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41 #include <pkgconf/kernel.h>
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42
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43 #include <cyg/kernel/clock.hxx>
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44 #include <cyg/kernel/thread.hxx>
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45
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46 #include <cyg/infra/testcase.h>
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47
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48 #include <cyg/kernel/clock.inl>
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49 #include <cyg/kernel/thread.inl>
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50
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51 #ifdef CYGVAR_KERNEL_COUNTERS_CLOCK
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52
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53 externC void diag_printf(const char *, ...);
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54
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55 static void null_printf(const char *, ...)
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56 { /* nothing */ }
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57
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58 #define PRINTF0 diag_printf
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59 #define nPRINTF0 null_printf
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60
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61 #define nPRINTF1 diag_printf
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62 #define PRINTF1 null_printf
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63
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64 #define nPRINTF2 diag_printf
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65 #define PRINTF2 null_printf
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67
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68 #define NTHREADS 1
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69 #include "testaux.hxx"
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70
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71 static struct { cyg_uint32 ns; double scale; } ns_tickers[] = {
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72 { 70000000, 7.0 }, // 7cS
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73 { 50000000, 5.0 }, // 5cS
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74 { 45000000, 4.5 }, // 4.5cS
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75 { 30000000, 3.0 }, // 3cS
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76 { 20000000, 2.0 }, // 2cS
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77 { 10000000, 1.0 }, // 1cS - no change
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78 { 5000000, 0.5 }, // 1/2 a cS
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79 { 4900000, 0.49 }, // a bit below
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80 { 3333333, 0.3333333 }, // 1/3 cS
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81 { 1250000, 0.125 }, // 800Hz
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82 { 1000000, 0.1 }, // 1000Hz
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83 { 909090, 0.0909090 }, // 1100Hz
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84 { 490000, 0.049 }, // 490uS
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85 { 333333, 0.0333333 }, // 1/30 cS, 1/3mS
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86 { 49000, 0.0049 }, // 49uS
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87 { 33333, 0.0033333 }, // 1/30 mS
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88 { 4900, 0.00049 }, // 4.9uS
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89 // now some outlandish ones
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90 { 170, 0.000017 }, // 170nS
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91 { 11, 0.0000011 }, // 11nS
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92 { 1000000000u, 100.0 }, // one second
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93 { 1234567777u, 123.4567777 }, // 1.234... seconds
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94 { 4294967291u, 429.4967291 }, // 4.3 seconds, nearly maxint.
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95 // now some which are prime in the nS per tick field
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96 { 909091, 0.0909091 }, // also 1100Hz - but 909091 is a prime!
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97 // and some eye-pleasing primes from the www - if they're not actually
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98 // prime, don't blame me. http://www.rsok.com/~jrm/printprimes.html
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99 { 1000003, 0.1000003 },
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100 { 1477771, 0.1477771 },
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101 { 2000003, 0.2000003 },
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102 { 2382001, 0.2382001 },
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103 { 3333133, 0.3333133 },
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104 { 3999971, 0.3999971 },
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105 { 5555591, 0.5555591 },
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106 { 6013919, 0.6013919 },
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107 // That's enough
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108 };
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109
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110 static void entry0( CYG_ADDRWORD data )
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111 {
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112 // First just try it with the clock as default:
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113 Cyg_Clock *rtc = Cyg_Clock::real_time_clock;
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114
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115 Cyg_Clock::converter cv, rcv;
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116 Cyg_Clock::cyg_resolution res;
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117
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118 unsigned int counter = 0;
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119 unsigned int skipped = 0;
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120
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121 unsigned int i;
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122 for ( i = 0; i < sizeof( ns_tickers )/sizeof( ns_tickers[0] ); i++ ) {
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123
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124 unsigned int lcounter = 0;
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125 unsigned int lskipped = 0;
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126
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127 rtc->get_other_to_clock_converter( ns_tickers[i].ns, &cv );
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128 rtc->get_clock_to_other_converter( ns_tickers[i].ns, &rcv );
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129
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130 PRINTF1( "ns per tick: %d\n", ns_tickers[i].ns );
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131 PRINTF1( " converter: * %d / %d * %d / %d\n",
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132 (int)cv.mul1, (int)cv.div1, (int)cv.mul2,(int) cv.div2 );
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133 PRINTF1( " reverser: * %d / %d * %d / %d\n",
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134 (int)rcv.mul1, (int)rcv.div1, (int)rcv.mul2, (int)rcv.div2 );
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135
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136 double d = 1.0;
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137 d *= (double)cv.mul1;
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138 d /= (double)cv.div1;
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139 d *= (double)cv.mul2;
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140 d /= (double)cv.div2;
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141 d *= (double)rcv.mul1;
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142 d /= (double)rcv.div1;
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143 d *= (double)rcv.mul2;
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144 d /= (double)rcv.div2;
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145 PRINTF1( " composite product %d.%d\n",
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146 (int)d, ((int)(d * 1000000) % 1000000 ) );
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147 d -= 1.0;
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148 CYG_TEST_CHECK( d < +0.0001, "Overflow in composite product" );
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149 CYG_TEST_CHECK( d > -0.0001, "Underflow in composite product" );
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150
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151 res = rtc->get_resolution();
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152
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153 double factor_other_to_clock;
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154 double factor_clock_to_other;
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155
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156 // res.dividend/res.divisor is the number of nS in a system
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157 // clock tick. So:
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158 d = (double)res.dividend/(double)res.divisor;
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159
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160 factor_other_to_clock = ns_tickers[i].scale * 1.0e7 / d ;
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161 factor_clock_to_other = d / (ns_tickers[i].scale * 1.0e7);
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162
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163 unsigned int j;
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164 for ( j = 1; j < 100; j++ ) {
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165 cyg_uint64 delay;
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166 if (cyg_test_is_simulator)
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167 j += 30; // test fewer values
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168 /* tr.b..m..k.. */
84
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169
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170
64
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171 for ( delay = j; delay < 1000000000000ll; delay *= 10 ) {
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172 // get the converted result
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173 cyg_uint64 result = Cyg_Clock::convert( delay, &cv );
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174
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175 counter++; lcounter++;
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176 if ( (double)delay * (double)cv.mul1 > 1.6e+19 ||
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177 (double)delay * (double)rcv.mul1 > 1.6e+19 ) {
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178 // in silly territory now, give up.
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179 // (that's MAXINT squared, approx.)
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180 skipped++; lskipped++;
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181 continue; // so the counter is accurate
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182 }
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183
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184 PRINTF2( "delay %x%08x to result %x%08x\n",
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185 (int)(delay >> 32), (int)delay,
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186 (int)(result >> 32), (int)result );
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187
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188 // get what it should be in double maths
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189 double delta = factor_other_to_clock * (double)delay;
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190 if ( delta > 1000.0 ) {
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191 delta = (double)result - delta;
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192 delta /= (double)result;
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193 CYG_TEST_CHECK( delta <= +0.01,
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194 "Proportional overflow in conversion to" );
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195 CYG_TEST_CHECK( delta >= -0.01,
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196 "Proportional underflow in conversion to" );
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197 }
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198 else {
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199 cyg_uint64 lo = (cyg_uint64)(delta); // assume TRUNCATION
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200 cyg_uint64 hi = lo + 1;
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201 CYG_TEST_CHECK( hi >= result,
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202 "Range overflow in conversion to" );
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203 CYG_TEST_CHECK( lo <= result,
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204 "Range underflow in conversion to" );
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205 }
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206
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207 // get the converted result
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208 result = Cyg_Clock::convert( delay, &rcv );
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209
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210 PRINTF2( "delay %x%08x from result %x%08x\n",
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211 (int)(delay >> 32), (int)delay,
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212 (int)(result >> 32), (int)result );
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213
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214 // get what it should be in double maths
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215 delta = factor_clock_to_other * (double)delay;
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216 if ( delta > 1000.0 ) {
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217 delta = (double)result - delta;
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218 delta /= (double)result;
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219 CYG_TEST_CHECK( delta <= +0.01,
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220 "Proportional overflow in conversion from" );
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221 CYG_TEST_CHECK( delta >= -0.01,
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222 "Proportional underflow in conversion from" );
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223 }
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224 else {
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225 cyg_uint64 lo = (cyg_uint64)(delta); // assume TRUNCATION
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226 cyg_uint64 hi = lo + 1;
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227 CYG_TEST_CHECK( hi >= result,
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228 "Range overflow in conversion from" );
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229 CYG_TEST_CHECK( lo <= result,
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230 "Range underflow in conversion from" );
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231 }
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232
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233 if (cyg_test_is_simulator)
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234 break;
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235 }
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236 }
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237 PRINTF0( "INFO:<%d nS/tick: tested %d values, skipped %d because of overflow>\n",
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238 ns_tickers[i].ns, lcounter, lskipped );
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239 }
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240
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241 PRINTF0( "INFO:<tested %d values, total skipped %d because of overflow>\n",
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242 counter, skipped );
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243
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244 CYG_TEST_PASS_FINISH("ClockCnv OK");
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245 }
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246
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247 void clockcnv_main( void )
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248 {
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249 CYG_TEST_INIT();
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250 new_thread(entry0, (CYG_ADDRWORD)&thread_obj[0]);
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251 Cyg_Scheduler::start();
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252 }
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253
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254 externC void
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255 cyg_start( void )
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256 {
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257 clockcnv_main();
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258 }
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259
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260 #else // def CYGVAR_KERNEL_COUNTERS_CLOCK
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261
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262 externC void
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263 cyg_start( void )
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264 {
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265 CYG_TEST_INIT();
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266 CYG_TEST_NA( "Kernel real-time clock disabled");
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267 }
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268
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269 #endif // def CYGVAR_KERNEL_COUNTERS_CLOCK
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270
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271 // EOF clockcnv.cxx