1 | /* $Id: tstRTMemCache.cpp 99007 2023-03-16 14:13:51Z vboxsync $ */
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2 | /** @file
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3 | * IPRT Testcase - RTMemCache.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2010-2023 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 <iprt/memcache.h>
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42 |
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43 | #include <iprt/asm.h>
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44 | #include <iprt/err.h>
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45 | #include <iprt/initterm.h>
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46 | #include <iprt/mem.h>
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47 | #include <iprt/param.h>
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48 | #include <iprt/rand.h>
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49 | #include <iprt/string.h>
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50 | #include <iprt/semaphore.h>
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51 | #include <iprt/test.h>
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52 | #include <iprt/time.h>
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53 | #include <iprt/thread.h>
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54 |
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55 |
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56 | /*********************************************************************************************************************************
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57 | * Structures and Typedefs *
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58 | *********************************************************************************************************************************/
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59 | typedef struct TST3THREAD
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60 | {
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61 | RTTHREAD hThread;
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62 | RTSEMEVENTMULTI hEvt;
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63 | uint64_t volatile cIterations;
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64 | uint32_t cbObject;
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65 | bool fUseCache;
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66 | } TST3THREAD, *PTST3THREAD;
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67 |
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68 |
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69 | /*********************************************************************************************************************************
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70 | * Global Variables *
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71 | *********************************************************************************************************************************/
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72 | /** The test handle */
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73 | static RTTEST g_hTest;
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74 | /** Global mem cache handle for use in some of the testcases. */
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75 | static RTMEMCACHE g_hMemCache;
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76 | /** Stop indicator for tst3 threads. */
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77 | static bool volatile g_fTst3Stop;
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78 |
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79 |
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80 | /**
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81 | * Basic API checks.
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82 | * We'll return if any of these fails.
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83 | */
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84 | static void tst1(void)
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85 | {
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86 | RTTestISub("Basics");
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87 |
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88 | /* Create one without constructor or destructor. */
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89 | uint32_t const cObjects = PAGE_SIZE * 2 / 256;
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90 | RTMEMCACHE hMemCache;
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91 | RTTESTI_CHECK_RC_RETV(RTMemCacheCreate(&hMemCache, 256, 32 /*cbAlignment*/, cObjects, NULL, NULL, NULL, 0 /*fFlags*/), VINF_SUCCESS);
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92 | RTTESTI_CHECK_RETV(hMemCache != NIL_RTMEMCACHE);
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93 |
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94 | /* Allocate a bit and free it again. */
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95 | void *pv = NULL;
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96 | RTTESTI_CHECK_RC_RETV(RTMemCacheAllocEx(hMemCache, &pv), VINF_SUCCESS);
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97 | RTTESTI_CHECK_RETV(pv != NULL);
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98 | RTTESTI_CHECK_RETV(RT_ALIGN_P(pv, 32) == pv);
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99 | RTMemCacheFree(hMemCache, pv);
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100 |
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101 | RTTESTI_CHECK((pv = RTMemCacheAlloc(hMemCache)) != NULL);
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102 | RTMemCacheFree(hMemCache, pv);
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103 |
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104 | /* Allocate everything and free it again, checking size constraints. */
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105 | for (uint32_t iLoop = 0; iLoop < 20; iLoop++)
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106 | {
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107 | /* Allocate everything. */
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108 | void *apv[cObjects];
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109 | for (uint32_t i = 0; i < cObjects; i++)
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110 | {
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111 | apv[i] = NULL;
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112 | RTTESTI_CHECK_RC(RTMemCacheAllocEx(hMemCache, &apv[i]), VINF_SUCCESS);
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113 | }
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114 |
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115 | /* Check that we've got it all. */
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116 | int rc;
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117 | RTTESTI_CHECK_RC(rc = RTMemCacheAllocEx(hMemCache, &pv), VERR_MEM_CACHE_MAX_SIZE);
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118 | if (RT_SUCCESS(rc))
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119 | RTMemCacheFree(hMemCache, pv);
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120 |
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121 | RTTESTI_CHECK((pv = RTMemCacheAlloc(hMemCache)) == NULL);
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122 | RTMemCacheFree(hMemCache, pv);
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123 |
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124 | /* Free all the allocations. */
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125 | for (uint32_t i = 0; i < cObjects; i++)
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126 | {
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127 | RTMemCacheFree(hMemCache, apv[i]);
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128 |
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129 | RTTESTI_CHECK((pv = RTMemCacheAlloc(hMemCache)) != NULL);
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130 | RTMemCacheFree(hMemCache, pv);
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131 | }
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132 | }
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133 |
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134 | /* Destroy it. */
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135 | RTTESTI_CHECK_RC(RTMemCacheDestroy(hMemCache), VINF_SUCCESS);
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136 | RTTESTI_CHECK_RC(RTMemCacheDestroy(NIL_RTMEMCACHE), VINF_SUCCESS);
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137 | }
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138 |
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139 |
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140 |
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141 | /** Constructor for tst2. */
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142 | static DECLCALLBACK(int) tst2Ctor(RTMEMCACHE hMemCache, void *pvObj, void *pvUser)
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143 | {
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144 | RTTESTI_CHECK(hMemCache == g_hMemCache);
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145 | RTTESTI_CHECK(ASMMemIsZero(pvObj, 256));
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146 |
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147 | if (*(bool *)pvUser)
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148 | return VERR_RESOURCE_BUSY;
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149 |
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150 | strcat((char *)pvObj, "ctor was called\n");
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151 | return VINF_SUCCESS;
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152 | }
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153 |
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154 |
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155 | /** Destructor for tst2. Checks that it was constructed and used twice. */
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156 | static DECLCALLBACK(void) tst2Dtor(RTMEMCACHE hMemCache, void *pvObj, void *pvUser)
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157 | {
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158 | RT_NOREF_PV(hMemCache); RT_NOREF_PV(pvUser);
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159 |
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160 | RTTESTI_CHECK(!strcmp((char *)pvObj, "ctor was called\nused\nused\n"));
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161 | strcat((char *)pvObj, "dtor was called\n");
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162 | }
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163 |
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164 | /**
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165 | * Test constructor / destructor.
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166 | */
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167 | static void tst2(void)
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168 | {
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169 | RTTestISub("Ctor/Dtor");
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170 |
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171 | /* Create one without constructor or destructor. */
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172 | bool fFail = false;
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173 | uint32_t const cObjects = PAGE_SIZE * 2 / 256;
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174 | RTTESTI_CHECK_RC_RETV(RTMemCacheCreate(&g_hMemCache, 256, 32 /*cbAlignemnt*/, cObjects, tst2Ctor, tst2Dtor, &fFail, 0 /*fFlags*/), VINF_SUCCESS);
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175 |
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176 | /* A failure run first. */
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177 | fFail = true;
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178 | void *pv = (void *)0x42;
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179 | RTTESTI_CHECK_RC_RETV(RTMemCacheAllocEx(g_hMemCache, &pv), VERR_RESOURCE_BUSY);
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180 | RTTESTI_CHECK(pv == (void *)0x42);
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181 | fFail = false;
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182 |
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183 | /* To two rounds where we allocate all the objects and free them again. */
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184 | for (uint32_t iLoop = 0; iLoop < 2; iLoop++)
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185 | {
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186 | void *apv[cObjects];
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187 | for (uint32_t i = 0; i < cObjects; i++)
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188 | {
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189 | apv[i] = NULL;
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190 | RTTESTI_CHECK_RC_RETV(RTMemCacheAllocEx(g_hMemCache, &apv[i]), VINF_SUCCESS);
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191 | if (iLoop == 0)
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192 | RTTESTI_CHECK(!strcmp((char *)apv[i], "ctor was called\n"));
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193 | else
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194 | RTTESTI_CHECK(!strcmp((char *)apv[i], "ctor was called\nused\n"));
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195 | strcat((char *)apv[i], "used\n");
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196 | }
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197 |
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198 | RTTESTI_CHECK_RETV((pv = RTMemCacheAlloc(g_hMemCache)) == NULL);
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199 | RTMemCacheFree(g_hMemCache, pv);
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200 |
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201 | for (uint32_t i = 0; i < cObjects; i++)
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202 | RTMemCacheFree(g_hMemCache, apv[i]);
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203 | }
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204 |
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205 | /* Cone, destroy the cache. */
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206 | RTTESTI_CHECK_RC(RTMemCacheDestroy(g_hMemCache), VINF_SUCCESS);
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207 | }
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208 |
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209 |
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210 | /**
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211 | * Thread that allocates
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212 | * @returns
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213 | * @param hThreadSelf The thread.
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214 | * @param pvArg Pointer to fUseCache.
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215 | */
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216 | static DECLCALLBACK(int) tst3Thread(RTTHREAD hThreadSelf, void *pvArg)
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217 | {
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218 | PTST3THREAD pThread = (PTST3THREAD)(pvArg);
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219 | size_t cbObject = pThread->cbObject;
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220 | uint64_t cIterations = 0;
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221 | RT_NOREF_PV(hThreadSelf);
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222 |
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223 | /* wait for the kick-off */
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224 | RTTEST_CHECK_RC_OK(g_hTest, RTSemEventMultiWait(pThread->hEvt, RT_INDEFINITE_WAIT));
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225 |
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226 | /* allocate and free loop */
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227 | if (pThread->fUseCache)
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228 | {
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229 | while (!g_fTst3Stop)
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230 | {
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231 | void *apv[64];
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232 | for (unsigned i = 0; i < RT_ELEMENTS(apv); i++)
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233 | {
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234 | apv[i] = RTMemCacheAlloc(g_hMemCache);
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235 | RTTEST_CHECK(g_hTest, apv[i] != NULL);
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236 | }
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237 | for (unsigned i = 0; i < RT_ELEMENTS(apv); i++)
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238 | RTMemCacheFree(g_hMemCache, apv[i]);
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239 |
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240 | cIterations += RT_ELEMENTS(apv);
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241 | }
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242 | }
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243 | else
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244 | {
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245 | while (!g_fTst3Stop)
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246 | {
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247 | void *apv[64];
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248 |
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249 | for (unsigned i = 0; i < RT_ELEMENTS(apv); i++)
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250 | {
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251 | apv[i] = RTMemAlloc(cbObject);
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252 | RTTEST_CHECK(g_hTest, apv[i] != NULL);
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253 | }
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254 |
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255 | for (unsigned i = 0; i < RT_ELEMENTS(apv); i++)
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256 | RTMemFree(apv[i]);
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257 |
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258 | cIterations += RT_ELEMENTS(apv);
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259 | }
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260 | }
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261 |
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262 | /* report back the status */
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263 | pThread->cIterations = cIterations;
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264 | return VINF_SUCCESS;
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265 | }
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266 |
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267 | /**
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268 | * Time constrained test with and unlimited N threads.
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269 | */
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270 | static void tst3(uint32_t cThreads, uint32_t cbObject, int iMethod, uint32_t cSecs)
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271 | {
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272 | RTTestISubF("Benchmark - %u threads, %u bytes, %u secs, %s", cThreads, cbObject, cSecs,
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273 | iMethod == 0 ? "RTMemCache"
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274 | : "RTMemAlloc");
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275 |
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276 | /*
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277 | * Create a cache with unlimited space, a start semaphore and line up
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278 | * the threads.
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279 | */
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280 | RTTESTI_CHECK_RC_RETV(RTMemCacheCreate(&g_hMemCache, cbObject, 0 /*cbAlignment*/, UINT32_MAX, NULL, NULL, NULL, 0 /*fFlags*/), VINF_SUCCESS);
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281 |
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282 | RTSEMEVENTMULTI hEvt;
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283 | RTTESTI_CHECK_RC_OK_RETV(RTSemEventMultiCreate(&hEvt));
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284 |
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285 | TST3THREAD aThreads[64];
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286 | RTTESTI_CHECK_RETV(cThreads < RT_ELEMENTS(aThreads));
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287 |
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288 | ASMAtomicWriteBool(&g_fTst3Stop, false);
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289 | for (uint32_t i = 0; i < cThreads; i++)
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290 | {
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291 | aThreads[i].hThread = NIL_RTTHREAD;
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292 | aThreads[i].cIterations = 0;
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293 | aThreads[i].fUseCache = iMethod == 0;
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294 | aThreads[i].cbObject = cbObject;
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295 | aThreads[i].hEvt = hEvt;
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296 | RTTESTI_CHECK_RC_OK_RETV(RTThreadCreateF(&aThreads[i].hThread, tst3Thread, &aThreads[i], 0,
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297 | RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "tst3-%u", i));
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298 | }
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299 |
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300 | /*
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301 | * Start the race.
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302 | */
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303 | RTTimeNanoTS(); /* warmup */
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304 |
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305 | uint64_t uStartTS = RTTimeNanoTS();
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306 | RTTESTI_CHECK_RC_OK_RETV(RTSemEventMultiSignal(hEvt));
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307 | RTThreadSleep(cSecs * 1000);
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308 | ASMAtomicWriteBool(&g_fTst3Stop, true);
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309 | for (uint32_t i = 0; i < cThreads; i++)
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310 | RTTESTI_CHECK_RC_OK_RETV(RTThreadWait(aThreads[i].hThread, 60*1000, NULL));
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311 | uint64_t cElapsedNS = RTTimeNanoTS() - uStartTS;
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312 |
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313 | /*
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314 | * Sum up the counts.
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315 | */
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316 | uint64_t cIterations = 0;
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317 | for (uint32_t i = 0; i < cThreads; i++)
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318 | cIterations += aThreads[i].cIterations;
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319 |
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320 | RTTestIPrintf(RTTESTLVL_ALWAYS, "%'8u iterations per second, %'llu ns on avg\n",
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321 | (unsigned)((long double)cIterations * 1000000000.0 / (long double)cElapsedNS),
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322 | cElapsedNS / cIterations);
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323 |
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324 | /* clean up */
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325 | RTTESTI_CHECK_RC(RTMemCacheDestroy(g_hMemCache), VINF_SUCCESS);
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326 | RTTESTI_CHECK_RC_OK(RTSemEventMultiDestroy(hEvt));
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327 | }
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328 |
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329 | static void tst3AllMethods(uint32_t cThreads, uint32_t cbObject, uint32_t cSecs)
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330 | {
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331 | tst3(cThreads, cbObject, 0, cSecs);
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332 | tst3(cThreads, cbObject, 1, cSecs);
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333 | }
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334 |
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335 |
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336 | int main(int argc, char **argv)
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337 | {
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338 | RT_NOREF_PV(argc); RT_NOREF_PV(argv);
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339 |
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340 | RTTEST hTest;
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341 | int rc = RTTestInitAndCreate("tstRTMemCache", &hTest);
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342 | if (rc)
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343 | return rc;
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344 | RTTestBanner(hTest);
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345 | g_hTest = hTest;
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346 |
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347 | tst1();
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348 | tst2();
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349 | if (RTTestIErrorCount() == 0)
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350 | {
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351 | uint32_t cSecs = argc == 1 ? 5 : 2;
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352 | /* threads, cbObj, cSecs */
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353 | tst3AllMethods( 1, 256, cSecs);
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354 | tst3AllMethods( 1, 32, cSecs);
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355 | tst3AllMethods( 1, 8, cSecs);
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356 | tst3AllMethods( 1, 2, cSecs);
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357 | tst3AllMethods( 1, 1, cSecs);
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358 |
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359 | tst3AllMethods( 3, 256, cSecs);
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360 | tst3AllMethods( 3, 128, cSecs);
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361 | tst3AllMethods( 3, 64, cSecs);
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362 | tst3AllMethods( 3, 32, cSecs);
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363 | tst3AllMethods( 3, 2, cSecs);
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364 | tst3AllMethods( 3, 1, cSecs);
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365 |
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366 | tst3AllMethods( 16, 32, cSecs);
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367 | }
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368 |
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369 | /*
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370 | * Summary.
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371 | */
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372 | return RTTestSummaryAndDestroy(hTest);
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373 | }
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374 |
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