diff options
Diffstat (limited to 'src/VBox/Runtime/r3/linux/thread-affinity-linux.cpp')
-rw-r--r-- | src/VBox/Runtime/r3/linux/thread-affinity-linux.cpp | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/linux/thread-affinity-linux.cpp b/src/VBox/Runtime/r3/linux/thread-affinity-linux.cpp new file mode 100644 index 00000000..8eb51488 --- /dev/null +++ b/src/VBox/Runtime/r3/linux/thread-affinity-linux.cpp @@ -0,0 +1,105 @@ +/* $Id: thread-affinity-linux.cpp $ */ +/** @file + * IPRT - Thread Affinity, Linux ring-3 implementation. + */ + +/* + * Copyright (C) 2011-2022 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox 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. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + + +/********************************************************************************************************************************* +* 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 + |