1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/* $Id: thread-affinity-linux.cpp $ */
/** @file
* IPRT - Thread Affinity, Linux ring-3 implementation.
*/
/*
* Copyright (C) 2011-2019 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 *
*********************************************************************************************************************************/
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include <features.h>
#if __GLIBC_PREREQ(2,4)
#include <sched.h>
#include <unistd.h>
#include <errno.h>
#include <pthread.h>
#include <iprt/thread.h>
#include "internal/iprt.h"
#include <iprt/assert.h>
#include <iprt/cpuset.h>
#include <iprt/err.h>
#include <iprt/mp.h>
RTR3DECL(int) RTThreadSetAffinity(PCRTCPUSET pCpuSet)
{
/* convert */
cpu_set_t LnxCpuSet;
CPU_ZERO(&LnxCpuSet);
if (!pCpuSet)
for (unsigned iCpu = 0; iCpu < CPU_SETSIZE; iCpu++)
CPU_SET(iCpu, &LnxCpuSet);
else
for (unsigned iCpu = 0; iCpu < RT_MIN(CPU_SETSIZE, RTCPUSET_MAX_CPUS); iCpu++)
if (RTCpuSetIsMemberByIndex(pCpuSet, iCpu))
CPU_SET(iCpu, &LnxCpuSet);
int rc = pthread_setaffinity_np(pthread_self(), sizeof(LnxCpuSet), &LnxCpuSet);
if (!rc)
return VINF_SUCCESS;
rc = errno;
if (rc == ENOENT)
return VERR_CPU_NOT_FOUND;
return RTErrConvertFromErrno(errno);
}
RTR3DECL(int) RTThreadGetAffinity(PRTCPUSET pCpuSet)
{
cpu_set_t LnxCpuSet;
int rc = pthread_getaffinity_np(pthread_self(), sizeof(LnxCpuSet), &LnxCpuSet);
if (rc != 0)
return RTErrConvertFromErrno(errno);
/* convert */
RTCpuSetEmpty(pCpuSet);
for (unsigned iCpu = 0; iCpu < RT_MIN(CPU_SETSIZE, RTCPUSET_MAX_CPUS); iCpu++)
if (CPU_ISSET(iCpu, &LnxCpuSet))
RTCpuSetAddByIndex(pCpuSet, iCpu);
return VINF_SUCCESS;
}
#else
# include "../../generic/RTThreadGetAffinity-stub-generic.cpp"
# include "../../generic/RTThreadSetAffinity-stub-generic.cpp"
#endif
|
