| 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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