1 | /* $Id: mp-solaris.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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2 | /** @file
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3 | * IPRT - Multiprocessor, Solaris.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2008-2023 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 | #define LOG_GROUP RTLOGGROUP_DEFAULT
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42 | #include <unistd.h>
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43 | #include <stdio.h>
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44 | #include <errno.h>
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45 | #include <kstat.h>
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46 | #include <sys/processor.h>
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47 |
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48 | #include <iprt/mp.h>
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49 | #include <iprt/cpuset.h>
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50 | #include <iprt/assert.h>
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51 | #include <iprt/critsect.h>
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52 | #include <iprt/err.h>
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53 | #include <iprt/mem.h>
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54 | #include <iprt/log.h>
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55 | #include <iprt/once.h>
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56 | #include <iprt/string.h>
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57 |
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58 |
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59 | /*********************************************************************************************************************************
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60 | * Global Variables *
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61 | *********************************************************************************************************************************/
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62 | /** Initialization serializing (rtMpSolarisOnce). */
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63 | static RTONCE g_MpSolarisOnce = RTONCE_INITIALIZER;
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64 | /** Critical section serializing access to kstat. */
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65 | static RTCRITSECT g_MpSolarisCritSect;
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66 | /** The kstat handle. */
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67 | static kstat_ctl_t *g_pKsCtl;
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68 | /** Array pointing to the cpu_info instances. */
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69 | static kstat_t **g_papCpuInfo;
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70 | /** The number of entries in g_papCpuInfo */
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71 | static RTCPUID g_capCpuInfo;
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72 | /** Array of core ids. */
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73 | static uint64_t *g_pu64CoreIds;
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74 | /** Number of entries in g_pu64CoreIds. */
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75 | static size_t g_cu64CoreIds;
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76 | /** Number of cores in the system. */
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77 | static size_t g_cCores;
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78 |
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79 |
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80 | /**
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81 | * Helper for getting the core ID for a given CPU/strand/hyperthread.
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82 | *
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83 | * @returns The core ID.
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84 | * @param idCpu The CPU ID instance.
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85 | */
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86 | static inline uint64_t rtMpSolarisGetCoreId(RTCPUID idCpu)
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87 | {
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88 | kstat_named_t *pStat = (kstat_named_t *)kstat_data_lookup(g_papCpuInfo[idCpu], (char *)"core_id");
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89 | Assert(pStat->data_type == KSTAT_DATA_LONG);
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90 | Assert(pStat->value.l >= 0);
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91 | AssertCompile(sizeof(uint64_t) >= sizeof(long)); /* Paranoia. */
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92 | return (uint64_t)pStat->value.l;
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93 | }
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94 |
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95 |
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96 | /**
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97 | * Populates 'g_pu64CoreIds' array with unique core identifiers in the system.
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98 | *
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99 | * @returns VBox status code.
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100 | */
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101 | static int rtMpSolarisGetCoreIds(void)
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102 | {
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103 | for (RTCPUID idCpu = 0; idCpu < g_capCpuInfo; idCpu++)
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104 | {
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105 | /*
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106 | * It is possible that the number of cores don't match the maximum number
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107 | * of cores possible on the system. Hence check if we have a valid cpu_info
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108 | * object. We don't want to break out if it's NULL, the array may be sparse
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109 | * in theory, see @bugref{8469}.
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110 | */
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111 | if (g_papCpuInfo[idCpu])
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112 | {
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113 | if (kstat_read(g_pKsCtl, g_papCpuInfo[idCpu], 0) != -1)
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114 | {
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115 | /* Strands/Hyperthreads share the same core ID. */
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116 | uint64_t u64CoreId = rtMpSolarisGetCoreId(idCpu);
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117 | bool fAddedCore = false;
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118 | for (RTCPUID i = 0; i < g_cCores; i++)
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119 | {
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120 | if (g_pu64CoreIds[i] == u64CoreId)
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121 | {
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122 | fAddedCore = true;
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123 | break;
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124 | }
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125 | }
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126 |
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127 | if (!fAddedCore)
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128 | {
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129 | g_pu64CoreIds[g_cCores] = u64CoreId;
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130 | ++g_cCores;
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131 | }
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132 | }
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133 | else
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134 | return VERR_INTERNAL_ERROR_2;
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135 | }
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136 | }
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137 |
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138 | return VINF_SUCCESS;
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139 | }
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140 |
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141 |
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142 | /**
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143 | * Run once function that initializes the kstats we need here.
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144 | *
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145 | * @returns IPRT status code.
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146 | * @param pvUser Unused.
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147 | */
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148 | static DECLCALLBACK(int) rtMpSolarisOnce(void *pvUser)
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149 | {
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150 | int rc = VINF_SUCCESS;
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151 | NOREF(pvUser);
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152 |
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153 | /*
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154 | * Open kstat and find the cpu_info entries for each of the CPUs.
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155 | */
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156 | g_pKsCtl = kstat_open();
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157 | if (g_pKsCtl)
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158 | {
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159 | g_capCpuInfo = RTMpGetCount();
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160 | if (RT_LIKELY(g_capCpuInfo > 0))
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161 | {
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162 | g_papCpuInfo = (kstat_t **)RTMemAllocZ(g_capCpuInfo * sizeof(kstat_t *));
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163 | if (g_papCpuInfo)
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164 | {
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165 | g_cu64CoreIds = g_capCpuInfo;
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166 | g_pu64CoreIds = (uint64_t *)RTMemAllocZ(g_cu64CoreIds * sizeof(uint64_t));
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167 | if (g_pu64CoreIds)
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168 | {
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169 | rc = RTCritSectInit(&g_MpSolarisCritSect);
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170 | if (RT_SUCCESS(rc))
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171 | {
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172 | RTCPUID i = 0;
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173 | for (kstat_t *pKsp = g_pKsCtl->kc_chain; pKsp != NULL; pKsp = pKsp->ks_next)
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174 | {
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175 | if (!RTStrCmp(pKsp->ks_module, "cpu_info"))
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176 | {
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177 | AssertBreak(i < g_capCpuInfo);
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178 | g_papCpuInfo[i++] = pKsp;
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179 | /** @todo ks_instance == cpu_id (/usr/src/uts/common/os/cpu.c)? Check this and fix it ASAP. */
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180 | }
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181 | }
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182 |
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183 | rc = rtMpSolarisGetCoreIds();
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184 | if (RT_SUCCESS(rc))
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185 | return VINF_SUCCESS;
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186 | else
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187 | Log(("rtMpSolarisGetCoreIds failed. rc=%Rrc\n", rc));
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188 | }
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189 |
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190 | RTMemFree(g_pu64CoreIds);
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191 | g_pu64CoreIds = NULL;
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192 | }
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193 | else
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194 | rc = VERR_NO_MEMORY;
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195 |
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196 | /* bail out, we failed. */
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197 | RTMemFree(g_papCpuInfo);
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198 | g_papCpuInfo = NULL;
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199 | }
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200 | else
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201 | rc = VERR_NO_MEMORY;
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202 | }
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203 | else
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204 | rc = VERR_CPU_IPE_1;
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205 | kstat_close(g_pKsCtl);
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206 | g_pKsCtl = NULL;
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207 | }
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208 | else
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209 | {
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210 | rc = RTErrConvertFromErrno(errno);
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211 | if (RT_SUCCESS(rc))
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212 | rc = VERR_INTERNAL_ERROR;
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213 | Log(("kstat_open() -> %d (%Rrc)\n", errno, rc));
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214 | }
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215 |
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216 | return rc;
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217 | }
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218 |
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219 |
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220 | /**
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221 | * RTOnceEx() cleanup function.
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222 | *
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223 | * @param pvUser Unused.
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224 | * @param fLazyCleanUpOk Whether lazy cleanup is okay or not.
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225 | */
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226 | static DECLCALLBACK(void) rtMpSolarisCleanUp(void *pvUser, bool fLazyCleanUpOk)
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227 | {
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228 | if (g_pKsCtl)
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229 | kstat_close(g_pKsCtl);
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230 | RTMemFree(g_pu64CoreIds);
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231 | RTMemFree(g_papCpuInfo);
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232 | }
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233 |
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234 |
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235 | /**
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236 | * Worker for RTMpGetCurFrequency and RTMpGetMaxFrequency.
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237 | *
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238 | * @returns The desired frequency on success, 0 on failure.
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239 | *
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240 | * @param idCpu The CPU ID.
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241 | * @param pszStatName The cpu_info stat name.
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242 | */
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243 | static uint64_t rtMpSolarisGetFrequency(RTCPUID idCpu, const char *pszStatName)
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244 | {
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245 | uint64_t u64 = 0;
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246 | int rc = RTOnceEx(&g_MpSolarisOnce, rtMpSolarisOnce, rtMpSolarisCleanUp, NULL /* pvUser */);
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247 | if (RT_SUCCESS(rc))
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248 | {
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249 | if ( idCpu < g_capCpuInfo
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250 | && g_papCpuInfo[idCpu])
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251 | {
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252 | rc = RTCritSectEnter(&g_MpSolarisCritSect);
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253 | AssertRC(rc);
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254 | if (RT_SUCCESS(rc))
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255 | {
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256 | if (kstat_read(g_pKsCtl, g_papCpuInfo[idCpu], 0) != -1)
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257 | {
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258 | /* Solaris really need to fix their APIs. Explicitly cast for now. */
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259 | kstat_named_t *pStat = (kstat_named_t *)kstat_data_lookup(g_papCpuInfo[idCpu], (char*)pszStatName);
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260 | if (pStat)
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261 | {
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262 | Assert(pStat->data_type == KSTAT_DATA_UINT64 || pStat->data_type == KSTAT_DATA_LONG);
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263 | switch (pStat->data_type)
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264 | {
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265 | case KSTAT_DATA_UINT64: u64 = pStat->value.ui64; break; /* current_clock_Hz */
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266 | case KSTAT_DATA_INT32: u64 = pStat->value.i32; break; /* clock_MHz */
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267 |
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268 | /* just in case... */
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269 | case KSTAT_DATA_UINT32: u64 = pStat->value.ui32; break;
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270 | case KSTAT_DATA_INT64: u64 = pStat->value.i64; break;
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271 | default:
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272 | AssertMsgFailed(("%d\n", pStat->data_type));
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273 | break;
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274 | }
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275 | }
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276 | else
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277 | Log(("kstat_data_lookup(%s) -> %d\n", pszStatName, errno));
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278 | }
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279 | else
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280 | Log(("kstat_read() -> %d\n", errno));
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281 | RTCritSectLeave(&g_MpSolarisCritSect);
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282 | }
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283 | }
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284 | else
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285 | Log(("invalid idCpu: %d (g_capCpuInfo=%d)\n", (int)idCpu, (int)g_capCpuInfo));
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286 | }
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287 |
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288 | return u64;
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289 | }
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290 |
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291 |
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292 | RTDECL(uint32_t) RTMpGetCurFrequency(RTCPUID idCpu)
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293 | {
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294 | return rtMpSolarisGetFrequency(idCpu, "current_clock_Hz") / 1000000;
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295 | }
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296 |
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297 |
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298 | RTDECL(uint32_t) RTMpGetMaxFrequency(RTCPUID idCpu)
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299 | {
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300 | return rtMpSolarisGetFrequency(idCpu, "clock_MHz");
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301 | }
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302 |
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303 |
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304 | #if defined(RT_ARCH_SPARC) || defined(RT_ARCH_SPARC64)
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305 | RTDECL(RTCPUID) RTMpCpuId(void)
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306 | {
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307 | /** @todo implement RTMpCpuId on solaris/r3! */
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308 | return NIL_RTCPUID;
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309 | }
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310 | #endif
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311 |
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312 |
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313 | RTDECL(int) RTMpCpuIdToSetIndex(RTCPUID idCpu)
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314 | {
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315 | return idCpu < RTCPUSET_MAX_CPUS ? (int)idCpu : -1;
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316 | }
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317 |
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318 |
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319 | RTDECL(RTCPUID) RTMpCpuIdFromSetIndex(int iCpu)
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320 | {
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321 | return (unsigned)iCpu < RTCPUSET_MAX_CPUS ? iCpu : NIL_RTCPUID;
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322 | }
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323 |
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324 |
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325 | RTDECL(RTCPUID) RTMpGetMaxCpuId(void)
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326 | {
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327 | return RTMpGetCount() - 1;
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328 | }
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329 |
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330 |
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331 | RTDECL(bool) RTMpIsCpuPossible(RTCPUID idCpu)
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332 | {
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333 | return idCpu != NIL_RTCPUID
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334 | && idCpu < (RTCPUID)RTMpGetCount();
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335 | }
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336 |
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337 |
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338 | RTDECL(bool) RTMpIsCpuOnline(RTCPUID idCpu)
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339 | {
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340 | int iStatus = p_online(idCpu, P_STATUS);
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341 | return iStatus == P_ONLINE
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342 | || iStatus == P_NOINTR;
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343 | }
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344 |
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345 |
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346 | RTDECL(bool) RTMpIsCpuPresent(RTCPUID idCpu)
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347 | {
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348 | int iStatus = p_online(idCpu, P_STATUS);
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349 | return iStatus != -1;
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350 | }
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351 |
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352 |
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353 | RTDECL(RTCPUID) RTMpGetCount(void)
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354 | {
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355 | /*
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356 | * Solaris has sysconf.
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357 | */
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358 | int cCpus = sysconf(_SC_NPROCESSORS_MAX);
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359 | if (cCpus < 0)
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360 | cCpus = sysconf(_SC_NPROCESSORS_CONF);
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361 | return cCpus;
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362 | }
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363 |
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364 |
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365 | RTDECL(PRTCPUSET) RTMpGetSet(PRTCPUSET pSet)
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366 | {
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367 | RTCpuSetEmpty(pSet);
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368 | int idCpu = RTMpGetCount();
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369 | while (idCpu-- > 0)
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370 | RTCpuSetAdd(pSet, idCpu);
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371 | return pSet;
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372 | }
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373 |
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374 |
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375 | RTDECL(RTCPUID) RTMpGetOnlineCount(void)
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376 | {
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377 | /*
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378 | * Solaris has sysconf.
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379 | */
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380 | return sysconf(_SC_NPROCESSORS_ONLN);
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381 | }
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382 |
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383 |
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384 | RTDECL(PRTCPUSET) RTMpGetOnlineSet(PRTCPUSET pSet)
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385 | {
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386 | RTCpuSetEmpty(pSet);
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387 | RTCPUID cCpus = RTMpGetCount();
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388 | for (RTCPUID idCpu = 0; idCpu < cCpus; idCpu++)
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389 | if (RTMpIsCpuOnline(idCpu))
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390 | RTCpuSetAdd(pSet, idCpu);
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391 | return pSet;
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392 | }
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393 |
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394 |
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395 | RTDECL(PRTCPUSET) RTMpGetPresentSet(PRTCPUSET pSet)
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396 | {
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397 | #ifdef RT_STRICT
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398 | RTCPUID cCpusPresent = 0;
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399 | #endif
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400 | RTCpuSetEmpty(pSet);
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401 | RTCPUID cCpus = RTMpGetCount();
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402 | for (RTCPUID idCpu = 0; idCpu < cCpus; idCpu++)
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403 | if (RTMpIsCpuPresent(idCpu))
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404 | {
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405 | RTCpuSetAdd(pSet, idCpu);
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406 | #ifdef RT_STRICT
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407 | cCpusPresent++;
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408 | #endif
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409 | }
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410 | Assert(cCpusPresent == RTMpGetPresentCount());
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411 | return pSet;
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412 | }
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413 |
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414 |
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415 | RTDECL(RTCPUID) RTMpGetPresentCount(void)
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416 | {
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417 | /*
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418 | * Solaris has sysconf.
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419 | */
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420 | return sysconf(_SC_NPROCESSORS_CONF);
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421 | }
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422 |
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423 |
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424 | RTDECL(RTCPUID) RTMpGetPresentCoreCount(void)
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425 | {
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426 | return RTMpGetCoreCount();
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427 | }
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428 |
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429 |
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430 | RTDECL(RTCPUID) RTMpGetCoreCount(void)
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431 | {
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432 | int rc = RTOnceEx(&g_MpSolarisOnce, rtMpSolarisOnce, rtMpSolarisCleanUp, NULL /* pvUser */);
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433 | if (RT_SUCCESS(rc))
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434 | return g_cCores;
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435 |
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436 | return 0;
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437 | }
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438 |
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439 |
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440 | RTDECL(RTCPUID) RTMpGetOnlineCoreCount(void)
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441 | {
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442 | RTCPUID uOnlineCores = 0;
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443 | int rc = RTOnceEx(&g_MpSolarisOnce, rtMpSolarisOnce, rtMpSolarisCleanUp, NULL /* pvUser */);
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444 | if (RT_SUCCESS(rc))
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445 | {
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446 | rc = RTCritSectEnter(&g_MpSolarisCritSect);
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447 | AssertRC(rc);
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448 |
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449 | /*
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450 | * For each core in the system, count how many are currently online.
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451 | */
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452 | for (RTCPUID j = 0; j < g_cCores; j++)
|
---|
453 | {
|
---|
454 | uint64_t u64CoreId = g_pu64CoreIds[j];
|
---|
455 | for (RTCPUID idCpu = 0; idCpu < g_capCpuInfo; idCpu++)
|
---|
456 | {
|
---|
457 | rc = kstat_read(g_pKsCtl, g_papCpuInfo[idCpu], 0);
|
---|
458 | AssertReturn(rc != -1, 0 /* rc */);
|
---|
459 | uint64_t u64ThreadCoreId = rtMpSolarisGetCoreId(idCpu);
|
---|
460 | if (u64ThreadCoreId == u64CoreId)
|
---|
461 | {
|
---|
462 | kstat_named_t *pStat = (kstat_named_t *)kstat_data_lookup(g_papCpuInfo[idCpu], (char *)"state");
|
---|
463 | Assert(pStat->data_type == KSTAT_DATA_CHAR);
|
---|
464 | if( !RTStrNCmp(pStat->value.c, PS_ONLINE, sizeof(PS_ONLINE) - 1)
|
---|
465 | || !RTStrNCmp(pStat->value.c, PS_NOINTR, sizeof(PS_NOINTR) - 1))
|
---|
466 | {
|
---|
467 | uOnlineCores++;
|
---|
468 | break; /* Move to the next core. We have at least 1 hyperthread online in the current core. */
|
---|
469 | }
|
---|
470 | }
|
---|
471 | }
|
---|
472 | }
|
---|
473 |
|
---|
474 | RTCritSectLeave(&g_MpSolarisCritSect);
|
---|
475 | }
|
---|
476 |
|
---|
477 | return uOnlineCores;
|
---|
478 | }
|
---|
479 |
|
---|