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/* $Id: systemmem-solaris.cpp $ */
/** @file
* IPRT - RTSystemQueryTotalRam, Solaris ring-3.
*/
/*
* Copyright (C) 2012-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/system.h>
#include "internal/iprt.h"
#include <iprt/errcore.h>
#include <iprt/assert.h>
#include <iprt/critsect.h>
#include <iprt/once.h>
#include <iprt/param.h>
#include <errno.h>
#include <kstat.h>
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
/** Initialize globals once. */
static RTONCE g_rtSysMemSolInitOnce = RTONCE_INITIALIZER;
/** Critical section serializing access to g_pKStatCtl and the other handles. */
static RTCRITSECT g_rtSysMemSolCritSect;
/** The kstate control handle. */
static kstat_ctl_t *g_pKStatCtl = NULL;
/** The unix.system_pages handle. */
static kstat_t *g_pUnixSysPages = NULL;
/** The zfs.archstats handle. */
static kstat_t *g_pZfsArcStats = NULL;
/** @callback_method_impl{FNRTONCE} */
static DECLCALLBACK(int) rtSysMemSolInit(void *pvUser)
{
int rc = RTCritSectInit(&g_rtSysMemSolCritSect);
if (RT_SUCCESS(rc))
{
g_pKStatCtl = kstat_open();
if (g_pKStatCtl)
{
g_pUnixSysPages = kstat_lookup(g_pKStatCtl, (char *)"unix", 0, (char *)"system_pages");
if (g_pUnixSysPages)
{
g_pZfsArcStats = kstat_lookup(g_pKStatCtl, (char *)"zfs", 0, (char *)"arcstats"); /* allow NULL */
return VINF_SUCCESS;
}
rc = RTErrConvertFromErrno(errno);
kstat_close(g_pKStatCtl);
g_pKStatCtl = NULL;
}
else
rc = RTErrConvertFromErrno(errno);
}
return rc;
}
/** @callback_method_impl{FNRTONCECLEANUP} */
static DECLCALLBACK(void) rtSysMemSolCleanUp(void *pvUser, bool fLazyCleanUpOk)
{
RTCritSectDelete(&g_rtSysMemSolCritSect);
kstat_close(g_pKStatCtl);
g_pKStatCtl = NULL;
g_pUnixSysPages = NULL;
g_pZfsArcStats = NULL;
NOREF(pvUser); NOREF(fLazyCleanUpOk);
}
RTDECL(int) RTSystemQueryTotalRam(uint64_t *pcb)
{
AssertPtrReturn(pcb, VERR_INVALID_POINTER);
int rc = RTOnceEx(&g_rtSysMemSolInitOnce, rtSysMemSolInit, rtSysMemSolCleanUp, NULL);
if (RT_SUCCESS(rc))
{
rc = RTCritSectEnter(&g_rtSysMemSolCritSect);
if (RT_SUCCESS(rc))
{
if (kstat_read(g_pKStatCtl, g_pUnixSysPages, NULL) != -1)
{
kstat_named_t *pData = (kstat_named_t *)kstat_data_lookup(g_pUnixSysPages, (char *)"physmem");
if (pData)
*pcb = (uint64_t)pData->value.ul * PAGE_SIZE;
else
rc = RTErrConvertFromErrno(errno);
}
else
rc = RTErrConvertFromErrno(errno);
RTCritSectLeave(&g_rtSysMemSolCritSect);
}
}
return rc;
}
RTDECL(int) RTSystemQueryAvailableRam(uint64_t *pcb)
{
AssertPtrReturn(pcb, VERR_INVALID_POINTER);
int rc = RTOnceEx(&g_rtSysMemSolInitOnce, rtSysMemSolInit, rtSysMemSolCleanUp, NULL);
if (RT_SUCCESS(rc))
{
rc = RTCritSectEnter(&g_rtSysMemSolCritSect);
if (RT_SUCCESS(rc))
{
if (kstat_read(g_pKStatCtl, g_pUnixSysPages, NULL) != -1)
{
kstat_named_t *pData = (kstat_named_t *)kstat_data_lookup(g_pUnixSysPages, (char *)"freemem");
if (pData)
{
*pcb = (uint64_t)pData->value.ul * PAGE_SIZE;
/*
* Adjust for ZFS greedyness if possible.
* (c_min is the target minimum size of the cache, it is not
* an absolute minimum.)
*/
if ( g_pZfsArcStats
&& kstat_read(g_pKStatCtl, g_pZfsArcStats, NULL) != -1)
{
kstat_named_t *pCurSize = (kstat_named_t *)kstat_data_lookup(g_pZfsArcStats, (char *)"size");
kstat_named_t *pMinSize = (kstat_named_t *)kstat_data_lookup(g_pZfsArcStats, (char *)"c_min");
if ( pCurSize
&& pMinSize
&& pCurSize->value.ul > pMinSize->value.ul)
{
*pcb += pCurSize->value.ul - pMinSize->value.ul;
}
}
}
else
rc = RTErrConvertFromErrno(errno);
}
RTCritSectLeave(&g_rtSysMemSolCritSect);
}
}
return rc;
}
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