Hardware Locality (hwloc): openfabrics-verbs.h Source File

Hardware Locality (hwloc) 2.14.0rc1

openfabrics-verbs.h
1/*
2 * SPDX-License-Identifier: BSD-3-Clause
3 * Copyright © 2009 CNRS
4 * Copyright © 2009-2023 Inria. All rights reserved.
5 * Copyright © 2009-2010 Université Bordeaux
6 * Copyright © 2009-2011 Cisco Systems, Inc. All rights reserved.
7 * See COPYING in top-level directory.
8 */
9
19
20#ifndef HWLOC_OPENFABRICS_VERBS_H
21#define HWLOC_OPENFABRICS_VERBS_H
22
23#include "hwloc.h"
24#include "hwloc/autogen/config.h"
25#ifdef HWLOC_LINUX_SYS
26#include "hwloc/linux.h"
27#endif
28
29#include <infiniband/verbs.h>
30
31
32#ifdef __cplusplus
33extern "C" {
34#endif
35
36
44
65static __hwloc_inline int
66hwloc_ibv_get_device_cpuset(hwloc_topology_t topology __hwloc_attribute_unused,
67 struct ibv_device *ibdev, hwloc_cpuset_t set)
68{
69#ifdef HWLOC_LINUX_SYS
70 /* If we're on Linux, use the verbs-provided sysfs mechanism to
71 get the local cpus */
72#define HWLOC_OPENFABRICS_VERBS_SYSFS_PATH_MAX 128
73 char path[HWLOC_OPENFABRICS_VERBS_SYSFS_PATH_MAX];
74
75 if (!hwloc_topology_is_thissystem(topology)) {
76 errno = EINVAL;
77 return -1;
78 }
79
80 sprintf(path, "/sys/class/infiniband/%s/device/local_cpus",
81 ibv_get_device_name(ibdev));
82 if (hwloc_linux_read_path_as_cpumask(path, set) < 0
83 || hwloc_bitmap_iszero(set))
84 hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
85#else
86 /* Non-Linux systems simply get a full cpuset */
87 hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
88#endif
89 return 0;
90}
91
109static __hwloc_inline hwloc_obj_t
110hwloc_ibv_get_device_osdev_by_name(hwloc_topology_t topology,
111 const char *ibname)
112{
113 hwloc_obj_t osdev = NULL;
114 while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
115 if (HWLOC_OBJ_OSDEV_OPENFABRICS == osdev->attr->osdev.type
116 && osdev->name && !strcmp(ibname, osdev->name))
117 return osdev;
118 }
119 return NULL;
120}
121
137static __hwloc_inline hwloc_obj_t
138hwloc_ibv_get_device_osdev(hwloc_topology_t topology,
139 struct ibv_device *ibdev)
140{
141 if (!hwloc_topology_is_thissystem(topology)) {
142 errno = EINVAL;
143 return NULL;
144 }
145 return hwloc_ibv_get_device_osdev_by_name(topology, ibv_get_device_name(ibdev));
146}
147
149
150
151#ifdef __cplusplus
152} /* extern "C" */
153#endif
154
155
156#endif /* HWLOC_OPENFABRICS_VERBS_H */
hwloc_cpuset_t
hwloc_bitmap_t hwloc_cpuset_t
A CPU set is a bitmap whose bits are set according to CPU physical OS indexes.
Definition hwloc.h:165
HWLOC_OBJ_OSDEV_OPENFABRICS
@ HWLOC_OBJ_OSDEV_OPENFABRICS
Operating system openfabrics device. For instance the "mlx4_0" InfiniBand HCA, "hfi1_0" Omni-Path int...
Definition hwloc.h:385
hwloc_obj_t
struct hwloc_obj * hwloc_obj_t
Convenience typedef; a pointer to a struct hwloc_obj.
Definition hwloc.h:637
hwloc_topology_t
struct hwloc_topology * hwloc_topology_t
Topology context.
Definition hwloc.h:748
hwloc_topology_is_thissystem
int hwloc_topology_is_thissystem(hwloc_topology_t restrict topology)
Does the topology context come from this system?
hwloc_topology_get_complete_cpuset
hwloc_const_cpuset_t hwloc_topology_get_complete_cpuset(hwloc_topology_t topology)
Get complete CPU set.
hwloc_get_next_osdev
hwloc_obj_t hwloc_get_next_osdev(hwloc_topology_t topology, hwloc_obj_t prev)
Get the next OS device in the system.
Definition helper.h:1291
hwloc_bitmap_iszero
int hwloc_bitmap_iszero(hwloc_const_bitmap_t bitmap)
Test whether bitmap bitmap is empty.
hwloc_bitmap_copy
int hwloc_bitmap_copy(hwloc_bitmap_t dst, hwloc_const_bitmap_t src)
Copy the contents of bitmap src into the already allocated bitmap dst.
hwloc_linux_read_path_as_cpumask
int hwloc_linux_read_path_as_cpumask(const char *path, hwloc_bitmap_t set)
Convert a linux kernel cpumask file path into a hwloc bitmap set.
hwloc_ibv_get_device_osdev_by_name
hwloc_obj_t hwloc_ibv_get_device_osdev_by_name(hwloc_topology_t topology, const char *ibname)
Get the hwloc OS device object corresponding to the OpenFabrics device named ibname.
Definition openfabrics-verbs.h:110
hwloc_ibv_get_device_cpuset
int hwloc_ibv_get_device_cpuset(hwloc_topology_t topology, struct ibv_device *ibdev, hwloc_cpuset_t set)
Get the CPU set of processors that are physically close to device ibdev.
Definition openfabrics-verbs.h:66
hwloc_ibv_get_device_osdev
hwloc_obj_t hwloc_ibv_get_device_osdev(hwloc_topology_t topology, struct ibv_device *ibdev)
Get the hwloc OS device object corresponding to the OpenFabrics device ibdev.
Definition openfabrics-verbs.h:138
hwloc_obj::name
char * name
Object-specific name if any. Mostly used for identifying OS devices and Misc objects where a name str...
Definition hwloc.h:449
hwloc_obj::attr
union hwloc_obj_attr_u * attr
Object type-specific Attributes, may be NULL if no attribute value was found.
Definition hwloc.h:456
hwloc_obj_attr_u::osdev
struct hwloc_obj_attr_u::hwloc_osdev_attr_s osdev
hwloc_obj_attr_u::hwloc_osdev_attr_s::type
hwloc_obj_osdev_type_t type
Definition hwloc.h:722