Hardware Locality (hwloc) 2.4.1

openfabrics-verbs.h
1 /*
2 * Copyright © 2009 CNRS
3 * Copyright © 2009-2020 Inria. All rights reserved.
4 * Copyright © 2009-2010 Université Bordeaux
5 * Copyright © 2009-2011 Cisco Systems, Inc. All rights reserved.
6 * See COPYING in top-level directory.
7 */
8
19 #ifndef HWLOC_OPENFABRICS_VERBS_H
20 #define HWLOC_OPENFABRICS_VERBS_H
21
22 #include "hwloc.h"
23 #include "hwloc/autogen/config.h"
24 #ifdef HWLOC_LINUX_SYS
25 #include "hwloc/linux.h"
26 #endif
27
28 #include <infiniband/verbs.h>
29
30
31 #ifdef __cplusplus
32 extern "C" {
33 #endif
34
35
61 static __hwloc_inline int
62 hwloc_ibv_get_device_cpuset(hwloc_topology_t topology __hwloc_attribute_unused,
63 struct ibv_device *ibdev, hwloc_cpuset_t set)
64 {
65 #ifdef HWLOC_LINUX_SYS
66 /* If we're on Linux, use the verbs-provided sysfs mechanism to
67 get the local cpus */
68 #define HWLOC_OPENFABRICS_VERBS_SYSFS_PATH_MAX 128
69 char path[HWLOC_OPENFABRICS_VERBS_SYSFS_PATH_MAX];
70
71 if (!hwloc_topology_is_thissystem(topology)) {
72 errno = EINVAL;
73 return -1;
74 }
75
76 sprintf(path, "/sys/class/infiniband/%s/device/local_cpus",
77 ibv_get_device_name(ibdev));
78 if (hwloc_linux_read_path_as_cpumask(path, set) < 0
79 || hwloc_bitmap_iszero(set))
80 hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
81 #else
82 /* Non-Linux systems simply get a full cpuset */
83 hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
84 #endif
85 return 0;
86 }
87
104 static __hwloc_inline hwloc_obj_t
105 hwloc_ibv_get_device_osdev_by_name(hwloc_topology_t topology,
106 const char *ibname)
107 {
108 hwloc_obj_t osdev = NULL;
109 while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
110 if (HWLOC_OBJ_OSDEV_OPENFABRICS == osdev->attr->osdev.type
111 && osdev->name && !strcmp(ibname, osdev->name))
112 return osdev;
113 }
114 return NULL;
115 }
116
131 static __hwloc_inline hwloc_obj_t
132 hwloc_ibv_get_device_osdev(hwloc_topology_t topology,
133 struct ibv_device *ibdev)
134 {
135 if (!hwloc_topology_is_thissystem(topology)) {
136 errno = EINVAL;
137 return NULL;
138 }
139 return hwloc_ibv_get_device_osdev_by_name(topology, ibv_get_device_name(ibdev));
140 }
141
145 #ifdef __cplusplus
146 } /* extern "C" */
147 #endif
148
149
150 #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:140
HWLOC_OBJ_OSDEV_OPENFABRICS
@ HWLOC_OBJ_OSDEV_OPENFABRICS
Operating system openfabrics device. For instance the "mlx4_0" InfiniBand HCA, or "hfi1_0" Omni-Path ...
Definition: hwloc.h:347
hwloc_topology_t
struct hwloc_topology * hwloc_topology_t
Topology context.
Definition: hwloc.h:691
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
static 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:1151
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
static 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:105
hwloc_ibv_get_device_cpuset
static 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:62
hwloc_ibv_get_device_osdev
static 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:132
hwloc_obj
Structure of a topology object.
Definition: hwloc.h:395
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:407
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:414
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:665