1 | /* $Id: tstSupTscDelta.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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2 | /** @file
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3 | * SUP Testcase - Global Info Page TSC Delta Measurement Utility.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2015-2023 Oracle and/or its affiliates.
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8 | *
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9 | * This file is part of VirtualBox base platform packages, as
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10 | * available from https://www.virtualbox.org.
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11 | *
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12 | * This program is free software; you can redistribute it and/or
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13 | * modify it under the terms of the GNU General Public License
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14 | * as published by the Free Software Foundation, in version 3 of the
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15 | * License.
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16 | *
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17 | * This program is distributed in the hope that it will be useful, but
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18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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20 | * General Public License 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
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23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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24 | *
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25 | * The contents of this file may alternatively be used under the terms
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26 | * of the Common Development and Distribution License Version 1.0
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27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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28 | * in the VirtualBox distribution, in which case the provisions of the
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29 | * CDDL are applicable instead of those of the GPL.
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30 | *
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31 | * You may elect to license modified versions of this file under the
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32 | * terms and conditions of either the GPL or the CDDL or both.
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33 | *
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34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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35 | */
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36 |
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37 |
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38 | /*********************************************************************************************************************************
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39 | * Header Files *
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40 | *********************************************************************************************************************************/
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41 | #include <VBox/sup.h>
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42 | #include <iprt/errcore.h>
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43 | #include <iprt/assert.h>
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44 | #include <iprt/stream.h>
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45 | #include <iprt/string.h>
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46 | #include <iprt/getopt.h>
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47 | #include <iprt/test.h>
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48 | #include <iprt/thread.h>
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49 |
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50 |
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51 |
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52 | int main(int argc, char **argv)
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53 | {
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54 | RTTEST hTest;
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55 | RTEXITCODE rcExit = RTTestInitExAndCreate(argc, &argv, 0 /*fRtInit*/, "tstSupTscDelta", &hTest);
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56 | if (rcExit != RTEXITCODE_SUCCESS)
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57 | return rcExit;
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58 |
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59 | /*
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60 | * Parse args
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61 | */
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62 | static const RTGETOPTDEF g_aOptions[] =
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63 | {
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64 | { "--iterations", 'i', RTGETOPT_REQ_INT32 },
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65 | { "--delay", 'd', RTGETOPT_REQ_INT32 },
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66 | };
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67 |
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68 | uint32_t cIterations = 0; /* Currently 0 so that it doesn't upset testing. */
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69 | uint32_t cMsSleepBetweenIterations = 10;
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70 |
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71 | int ch;
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72 | RTGETOPTUNION ValueUnion;
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73 | RTGETOPTSTATE GetState;
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74 | RTGetOptInit(&GetState, argc, argv, g_aOptions, RT_ELEMENTS(g_aOptions), 1, RTGETOPTINIT_FLAGS_NO_STD_OPTS);
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75 | while ((ch = RTGetOpt(&GetState, &ValueUnion)))
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76 | {
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77 | switch (ch)
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78 | {
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79 | case 'd':
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80 | cMsSleepBetweenIterations = ValueUnion.u32;
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81 | break;
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82 | case 'i':
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83 | cIterations = ValueUnion.u32;
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84 | break;
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85 |
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86 | default:
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87 | return RTGetOptPrintError(ch, &ValueUnion);
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88 | }
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89 | }
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90 | if (!cIterations)
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91 | return RTTestSkipAndDestroy(hTest, "Nothing to do. The --iterations argument is 0 or not given.");
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92 |
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93 | /*
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94 | * Init
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95 | */
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96 | PSUPDRVSESSION pSession = NIL_RTR0PTR;
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97 | int rc = SUPR3Init(&pSession);
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98 | if (RT_SUCCESS(rc))
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99 | {
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100 | PSUPGLOBALINFOPAGE pGip = g_pSUPGlobalInfoPage;
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101 | if (pGip)
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102 | {
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103 | if (pGip->enmUseTscDelta < SUPGIPUSETSCDELTA_PRACTICALLY_ZERO)
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104 | return RTTestSkipAndDestroy(hTest, "No deltas to play with: enmUseTscDelta=%d\n", pGip->enmUseTscDelta);
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105 |
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106 | /*
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107 | * Init stats.
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108 | */
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109 | struct
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110 | {
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111 | int64_t iLowest;
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112 | int64_t iHighest;
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113 | int64_t iTotal;
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114 | uint64_t uAbsMin;
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115 | uint64_t uAbsMax;
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116 | uint64_t uAbsTotal;
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117 | } aCpuStats[RTCPUSET_MAX_CPUS];
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118 | RT_ZERO(aCpuStats);
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119 | for (uint32_t i = 0; i < pGip->cCpus; i++)
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120 | {
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121 | aCpuStats[i].iLowest = INT64_MAX;
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122 | aCpuStats[i].iHighest = INT64_MIN;
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123 | aCpuStats[i].uAbsMin = UINT64_MAX;
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124 | }
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125 |
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126 | /*
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127 | * Do the work.
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128 | */
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129 | for (uint32_t iIteration = 0; ; iIteration++)
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130 | {
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131 | /*
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132 | * Display the current deltas and gather statistics.
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133 | */
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134 | RTPrintf("tstSupTscDelta: Iteration #%u results:", iIteration);
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135 | for (uint32_t iCpu = 0; iCpu < pGip->cCpus; iCpu++)
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136 | {
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137 | int64_t iTscDelta = pGip->aCPUs[iCpu].i64TSCDelta;
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138 |
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139 | /* print */
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140 | if ((iCpu % 4) == 0)
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141 | RTPrintf("\ntstSupTscDelta:");
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142 | if (pGip->aCPUs[iCpu].enmState != SUPGIPCPUSTATE_ONLINE)
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143 | RTPrintf(" %02x: offline ", iCpu);
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144 | else if (iTscDelta != INT64_MAX)
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145 | RTPrintf(" %02x: %-12lld", iCpu, iTscDelta);
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146 | else
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147 | RTPrintf(" %02x: INT64_MAX ", iCpu);
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148 |
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149 | /* stats */
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150 | if ( iTscDelta != INT64_MAX
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151 | && pGip->aCPUs[iCpu].enmState == SUPGIPCPUSTATE_ONLINE)
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152 | {
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153 | if (aCpuStats[iCpu].iLowest > iTscDelta)
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154 | aCpuStats[iCpu].iLowest = iTscDelta;
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155 | if (aCpuStats[iCpu].iHighest < iTscDelta)
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156 | aCpuStats[iCpu].iHighest = iTscDelta;
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157 | aCpuStats[iCpu].iTotal += iTscDelta;
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158 |
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159 | uint64_t uAbsTscDelta = iTscDelta >= 0 ? (uint64_t)iTscDelta : (uint64_t)-iTscDelta;
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160 | if (aCpuStats[iCpu].uAbsMin > uAbsTscDelta)
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161 | aCpuStats[iCpu].uAbsMin = uAbsTscDelta;
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162 | if (aCpuStats[iCpu].uAbsMax < uAbsTscDelta)
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163 | aCpuStats[iCpu].uAbsMax = uAbsTscDelta;
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164 | aCpuStats[iCpu].uAbsTotal += uAbsTscDelta;
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165 | }
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166 | }
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167 | if (((pGip->cCpus - 1) % 4) != 0)
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168 | RTPrintf("\n");
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169 |
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170 | /*
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171 | * Done?
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172 | */
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173 | if (iIteration + 1 >= cIterations)
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174 | break;
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175 |
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176 | /*
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177 | * Force a new measurement.
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178 | */
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179 | RTThreadSleep(cMsSleepBetweenIterations);
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180 | for (uint32_t iCpu = 0; iCpu < pGip->cCpus; iCpu++)
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181 | if (pGip->aCPUs[iCpu].enmState == SUPGIPCPUSTATE_ONLINE)
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182 | {
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183 | rc = SUPR3TscDeltaMeasure(pGip->aCPUs[iCpu].idCpu, false /*fAsync*/, true /*fForce*/, 64, 16 /*ms*/);
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184 | if (RT_FAILURE(rc))
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185 | RTTestFailed(hTest, "SUPR3TscDeltaMeasure failed on %#x: %Rrc", pGip->aCPUs[iCpu].idCpu, rc);
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186 | }
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187 | }
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188 |
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189 | /*
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190 | * Display statistics that we've gathered.
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191 | */
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192 | RTPrintf("tstSupTscDelta: Results:\n");
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193 | int64_t iLowest = INT64_MAX;
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194 | int64_t iHighest = INT64_MIN;
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195 | int64_t iTotal = 0;
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196 | uint32_t cTotal = 0;
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197 | for (uint32_t iCpu = 0; iCpu < pGip->cCpus; iCpu++)
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198 | {
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199 | if (pGip->aCPUs[iCpu].enmState != SUPGIPCPUSTATE_ONLINE)
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200 | RTPrintf("tstSupTscDelta: %02x: offline\n", iCpu);
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201 | else
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202 | {
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203 | RTPrintf("tstSupTscDelta: %02x: lowest=%-12lld highest=%-12lld average=%-12lld spread=%-12lld\n",
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204 | iCpu,
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205 | aCpuStats[iCpu].iLowest,
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206 | aCpuStats[iCpu].iHighest,
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207 | aCpuStats[iCpu].iTotal / cIterations,
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208 | aCpuStats[iCpu].iHighest - aCpuStats[iCpu].iLowest);
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209 | RTPrintf( "tstSupTscDelta: absmin=%-12llu absmax=%-12llu absavg=%-12llu idCpu=%#4x idApic=%#4x\n",
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210 | aCpuStats[iCpu].uAbsMin,
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211 | aCpuStats[iCpu].uAbsMax,
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212 | aCpuStats[iCpu].uAbsTotal / cIterations,
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213 | pGip->aCPUs[iCpu].idCpu,
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214 | pGip->aCPUs[iCpu].idApic);
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215 | if (iLowest > aCpuStats[iCpu].iLowest)
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216 | iLowest = aCpuStats[iCpu].iLowest;
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217 | if (iHighest < aCpuStats[iCpu].iHighest)
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218 | iHighest = aCpuStats[iCpu].iHighest;
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219 | iTotal += aCpuStats[iCpu].iHighest;
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220 | cTotal += cIterations;
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221 | }
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222 | }
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223 | RTPrintf("tstSupTscDelta: all: lowest=%-12lld highest=%-12lld average=%-12lld spread=%-12lld\n",
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224 | iLowest, iHighest, iTotal / cTotal, iHighest - iLowest);
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225 | }
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226 | else
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227 | RTTestFailed(hTest, "g_pSUPGlobalInfoPage is NULL");
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228 |
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229 | SUPR3Term(false /*fForced*/);
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230 | }
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231 | else
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232 | RTTestFailed(hTest, "SUPR3Init failed: %Rrc", rc);
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233 | return RTTestSummaryAndDestroy(hTest);
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234 | }
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235 |
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