1 | /* $Id: systemmem-solaris.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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2 | /** @file
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3 | * IPRT - RTSystemQueryTotalRam, Solaris ring-3.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2012-2023 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/system.h>
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42 | #include "internal/iprt.h"
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43 |
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44 | #include <iprt/errcore.h>
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45 | #include <iprt/assert.h>
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46 | #include <iprt/critsect.h>
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47 | #include <iprt/once.h>
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48 | #include <iprt/param.h>
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49 |
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50 | #include <errno.h>
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51 | #include <kstat.h>
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52 |
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53 |
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54 | /*********************************************************************************************************************************
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55 | * Global Variables *
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56 | *********************************************************************************************************************************/
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57 | /** Initialize globals once. */
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58 | static RTONCE g_rtSysMemSolInitOnce = RTONCE_INITIALIZER;
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59 | /** Critical section serializing access to g_pKStatCtl and the other handles. */
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60 | static RTCRITSECT g_rtSysMemSolCritSect;
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61 | /** The kstate control handle. */
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62 | static kstat_ctl_t *g_pKStatCtl = NULL;
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63 | /** The unix.system_pages handle. */
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64 | static kstat_t *g_pUnixSysPages = NULL;
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65 | /** The zfs.archstats handle. */
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66 | static kstat_t *g_pZfsArcStats = NULL;
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67 |
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68 |
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69 | /** @callback_method_impl{FNRTONCE} */
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70 | static DECLCALLBACK(int) rtSysMemSolInit(void *pvUser)
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71 | {
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72 | int rc = RTCritSectInit(&g_rtSysMemSolCritSect);
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73 | if (RT_SUCCESS(rc))
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74 | {
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75 | g_pKStatCtl = kstat_open();
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76 | if (g_pKStatCtl)
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77 | {
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78 | g_pUnixSysPages = kstat_lookup(g_pKStatCtl, (char *)"unix", 0, (char *)"system_pages");
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79 | if (g_pUnixSysPages)
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80 | {
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81 | g_pZfsArcStats = kstat_lookup(g_pKStatCtl, (char *)"zfs", 0, (char *)"arcstats"); /* allow NULL */
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82 | return VINF_SUCCESS;
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83 | }
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84 |
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85 | rc = RTErrConvertFromErrno(errno);
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86 | kstat_close(g_pKStatCtl);
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87 | g_pKStatCtl = NULL;
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88 | }
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89 | else
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90 | rc = RTErrConvertFromErrno(errno);
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91 | }
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92 | return rc;
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93 | }
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94 |
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95 |
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96 | /** @callback_method_impl{FNRTONCECLEANUP} */
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97 | static DECLCALLBACK(void) rtSysMemSolCleanUp(void *pvUser, bool fLazyCleanUpOk)
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98 | {
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99 | RTCritSectDelete(&g_rtSysMemSolCritSect);
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100 |
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101 | kstat_close(g_pKStatCtl);
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102 | g_pKStatCtl = NULL;
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103 | g_pUnixSysPages = NULL;
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104 | g_pZfsArcStats = NULL;
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105 |
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106 | NOREF(pvUser); NOREF(fLazyCleanUpOk);
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107 | }
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108 |
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109 |
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110 |
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111 | RTDECL(int) RTSystemQueryTotalRam(uint64_t *pcb)
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112 | {
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113 | AssertPtrReturn(pcb, VERR_INVALID_POINTER);
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114 |
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115 | int rc = RTOnceEx(&g_rtSysMemSolInitOnce, rtSysMemSolInit, rtSysMemSolCleanUp, NULL);
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116 | if (RT_SUCCESS(rc))
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117 | {
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118 | rc = RTCritSectEnter(&g_rtSysMemSolCritSect);
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119 | if (RT_SUCCESS(rc))
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120 | {
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121 | if (kstat_read(g_pKStatCtl, g_pUnixSysPages, NULL) != -1)
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122 | {
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123 | kstat_named_t *pData = (kstat_named_t *)kstat_data_lookup(g_pUnixSysPages, (char *)"physmem");
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124 | if (pData)
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125 | *pcb = (uint64_t)pData->value.ul * PAGE_SIZE;
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126 | else
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127 | rc = RTErrConvertFromErrno(errno);
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128 | }
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129 | else
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130 | rc = RTErrConvertFromErrno(errno);
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131 | RTCritSectLeave(&g_rtSysMemSolCritSect);
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132 | }
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133 | }
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134 | return rc;
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135 | }
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136 |
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137 |
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138 | RTDECL(int) RTSystemQueryAvailableRam(uint64_t *pcb)
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139 | {
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140 | AssertPtrReturn(pcb, VERR_INVALID_POINTER);
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141 |
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142 | int rc = RTOnceEx(&g_rtSysMemSolInitOnce, rtSysMemSolInit, rtSysMemSolCleanUp, NULL);
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143 | if (RT_SUCCESS(rc))
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144 | {
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145 | rc = RTCritSectEnter(&g_rtSysMemSolCritSect);
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146 | if (RT_SUCCESS(rc))
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147 | {
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148 | if (kstat_read(g_pKStatCtl, g_pUnixSysPages, NULL) != -1)
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149 | {
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150 | kstat_named_t *pData = (kstat_named_t *)kstat_data_lookup(g_pUnixSysPages, (char *)"freemem");
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151 | if (pData)
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152 | {
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153 | *pcb = (uint64_t)pData->value.ul * PAGE_SIZE;
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154 |
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155 | /*
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156 | * Adjust for ZFS greedyness if possible.
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157 | * (c_min is the target minimum size of the cache, it is not
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158 | * an absolute minimum.)
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159 | */
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160 | if ( g_pZfsArcStats
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161 | && kstat_read(g_pKStatCtl, g_pZfsArcStats, NULL) != -1)
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162 | {
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163 | kstat_named_t *pCurSize = (kstat_named_t *)kstat_data_lookup(g_pZfsArcStats, (char *)"size");
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164 | kstat_named_t *pMinSize = (kstat_named_t *)kstat_data_lookup(g_pZfsArcStats, (char *)"c_min");
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165 | if ( pCurSize
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166 | && pMinSize
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167 | && pCurSize->value.ul > pMinSize->value.ul)
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168 | {
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169 | *pcb += pCurSize->value.ul - pMinSize->value.ul;
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170 | }
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171 | }
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172 | }
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173 | else
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174 | rc = RTErrConvertFromErrno(errno);
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175 | }
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176 |
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177 | RTCritSectLeave(&g_rtSysMemSolCritSect);
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178 | }
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179 | }
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180 | return rc;
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181 | }
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182 |
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