| 1 | /* $Id: mp-freebsd.cpp 28800 2010-04-27 08:22:32Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Multiprocessor, FreeBSD.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2008 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 | /*******************************************************************************
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| 28 | * Header Files *
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| 29 | *******************************************************************************/
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| 30 | #define LOG_GROUP RTLOGGROUP_DEFAULT
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| 31 | #include <unistd.h>
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| 32 | #include <stdio.h>
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| 33 | #include <errno.h>
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| 34 | #include <sys/sysctl.h>
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| 35 |
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| 36 | #include <iprt/mp.h>
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| 37 | #include <iprt/cpuset.h>
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| 38 | #include <iprt/assert.h>
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| 39 | #include <iprt/string.h>
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| 40 | #include <iprt/alloc.h>
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| 41 | #include <iprt/log.h>
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| 42 | #include <iprt/once.h>
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| 43 | #include <iprt/critsect.h>
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| 44 |
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| 45 |
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| 46 | RTDECL(uint32_t) RTMpGetCurFrequency(RTCPUID idCpu)
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| 47 | {
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| 48 | int uFreqCurr = 0;
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| 49 | size_t cbParameter = sizeof(uFreqCurr);
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| 50 |
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| 51 | /* CPU's have a common frequency. */
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| 52 | int rc = sysctlbyname("dev.cpu.0.freq", &uFreqCurr, &cbParameter, NULL, NULL);
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| 53 | if (rc)
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| 54 | return 0;
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| 55 |
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| 56 | return (uint32_t)uFreqCurr;
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| 57 | }
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| 58 |
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| 59 |
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| 60 | RTDECL(uint32_t) RTMpGetMaxFrequency(RTCPUID idCpu)
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| 61 | {
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| 62 | char szFreqLevels[20]; /* Should be enough to get the highest level which is always the first. */
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| 63 | size_t cbFreqLevels = sizeof(szFreqLevels);
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| 64 |
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| 65 | memset(szFreqLevels, 0, sizeof(szFreqLevels));
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| 66 |
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| 67 | /*
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| 68 | * CPU 0 has the freq levels entry. ENOMEM is ok as we don't need all supported
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| 69 | * levels but only the first one.
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| 70 | */
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| 71 | int rc = sysctlbyname("dev.cpu.0.freq_levels", szFreqLevels, &cbFreqLevels, NULL, NULL);
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| 72 | if ( (rc && (errno != ENOMEM))
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| 73 | || (cbFreqLevels == 0))
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| 74 | return 0;
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| 75 |
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| 76 | /* Clear everything starting from the '/' */
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| 77 | unsigned i = 0;
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| 78 |
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| 79 | do
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| 80 | {
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| 81 | if (szFreqLevels[i] == '/')
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| 82 | {
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| 83 | memset(&szFreqLevels[i], 0, sizeof(szFreqLevels) - i);
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| 84 | break;
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| 85 | }
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| 86 | i++;
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| 87 | } while (i < sizeof(szFreqLevels));
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| 88 |
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| 89 | /* Returns 0 on failure. */
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| 90 | return RTStrToUInt32(szFreqLevels);
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| 91 | }
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| 92 |
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| 93 | RTDECL(RTCPUID) RTMpGetOnlineCount(void)
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| 94 | {
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| 95 | /*
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| 96 | * FreeBSD has sysconf.
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| 97 | */
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| 98 | return sysconf(_SC_NPROCESSORS_ONLN);
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| 99 | }
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| 100 |
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