derek.holloway
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78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/*
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* Copyright © 2009 CNRS
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* Copyright © 2009-2016 Inria. All rights reserved.
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* Copyright © 2009-2011 Université Bordeaux
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* See COPYING in top-level directory.
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*/
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/** \file
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* \brief Macros to help interaction between hwloc and Linux.
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*
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* Applications that use hwloc on Linux may want to include this file
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* if using some low-level Linux features.
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*/
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#ifndef HWLOC_LINUX_H
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#define HWLOC_LINUX_H
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#include <hwloc.h>
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#include <stdio.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** \defgroup hwlocality_linux Linux-specific helpers
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*
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* This includes helpers for manipulating Linux kernel cpumap files, and hwloc
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* equivalents of the Linux sched_setaffinity and sched_getaffinity system calls.
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*
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* @{
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*/
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/** \brief Convert a linux kernel cpumap file \p file into hwloc CPU set.
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*
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* Might be used when reading CPU set from sysfs attributes such as topology
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* and caches for processors, or local_cpus for devices.
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*/
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HWLOC_DECLSPEC int hwloc_linux_parse_cpumap_file(FILE *file, hwloc_cpuset_t set);
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/** \brief Bind a thread \p tid on cpus given in cpuset \p set
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*
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* The behavior is exactly the same as the Linux sched_setaffinity system call,
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* but uses a hwloc cpuset.
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*
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* \note This is equivalent to calling hwloc_set_proc_cpubind() with
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* HWLOC_CPUBIND_THREAD as flags.
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*/
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HWLOC_DECLSPEC int hwloc_linux_set_tid_cpubind(hwloc_topology_t topology, pid_t tid, hwloc_const_cpuset_t set);
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/** \brief Get the current binding of thread \p tid
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*
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* The behavior is exactly the same as the Linux sched_getaffinity system call,
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* but uses a hwloc cpuset.
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*
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* \note This is equivalent to calling hwloc_get_proc_cpubind() with
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* ::HWLOC_CPUBIND_THREAD as flags.
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*/
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HWLOC_DECLSPEC int hwloc_linux_get_tid_cpubind(hwloc_topology_t topology, pid_t tid, hwloc_cpuset_t set);
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/** \brief Get the last physical CPU where thread \p tid ran.
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*
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* \note This is equivalent to calling hwloc_get_proc_last_cpu_location() with
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* ::HWLOC_CPUBIND_THREAD as flags.
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*/
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HWLOC_DECLSPEC int hwloc_linux_get_tid_last_cpu_location(hwloc_topology_t topology, pid_t tid, hwloc_bitmap_t set);
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/** @} */
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* HWLOC_LINUX_H */
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