Hardware Locality (hwloc) 1.10.0

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openfabrics-verbs.h
1 /*
2 * Copyright © 2009 CNRS
3 * Copyright © 2009-2013 Inria. All rights reserved.
4 * Copyright © 2009-2010 Université Bordeaux 1
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 FILE *sysfile = NULL;
71
72 if (!hwloc_topology_is_thissystem(topology)) {
73 errno = EINVAL;
74 return -1;
75 }
76
77 sprintf(path, "/sys/class/infiniband/%s/device/local_cpus",
78 ibv_get_device_name(ibdev));
79 sysfile = fopen(path, "r");
80 if (!sysfile)
81 return -1;
82
83 hwloc_linux_parse_cpumap_file(sysfile, set);
84 if (hwloc_bitmap_iszero(set))
85 hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
86
87 fclose(sysfile);
88 #else
89 /* Non-Linux systems simply get a full cpuset */
90 hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
91 #endif
92 return 0;
93 }
94
109 static __hwloc_inline hwloc_obj_t
110 hwloc_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
136 static __hwloc_inline hwloc_obj_t
137 hwloc_ibv_get_device_osdev(hwloc_topology_t topology,
138 struct ibv_device *ibdev)
139 {
140 if (!hwloc_topology_is_thissystem(topology)) {
141 errno = EINVAL;
142 return NULL;
143 }
144 return hwloc_ibv_get_device_osdev_by_name(topology, ibv_get_device_name(ibdev));
145 }
146
150 #ifdef __cplusplus
151 } /* extern "C" */
152 #endif
153
154
155 #endif /* HWLOC_OPENFABRICS_VERBS_H */
hwloc_obj_attr_u::hwloc_osdev_attr_s::type
hwloc_obj_osdev_type_t type
Definition: hwloc.h:528
hwloc_topology_is_thissystem
int hwloc_topology_is_thissystem(hwloc_topology_t restrict topology)
Does the topology context come from this system?
hwloc_obj::name
char * name
Object description if any.
Definition: hwloc.h:343
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:110
HWLOC_OBJ_OSDEV_OPENFABRICS
Operating system openfabrics device. For instance the "mlx4_0" InfiniBand HCA device on Linux...
Definition: hwloc.h:274
hwloc_topology_get_complete_cpuset
static hwloc_const_cpuset_t hwloc_topology_get_complete_cpuset(hwloc_topology_t topology)
Get complete CPU set.
Definition: helper.h:782
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:1231
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:137
hwloc_linux_parse_cpumap_file
int hwloc_linux_parse_cpumap_file(FILE *file, hwloc_cpuset_t set)
Convert a linux kernel cpumap file file into hwloc CPU set.
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:347
hwloc_bitmap_iszero
int hwloc_bitmap_iszero(hwloc_const_bitmap_t bitmap)
Test whether bitmap bitmap is empty.
hwloc_bitmap_copy
void 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_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 logical processors that are physically close to device ibdev.
Definition: openfabrics-verbs.h:62
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:122
hwloc_topology_t
struct hwloc_topology * hwloc_topology_t
Topology context.
Definition: hwloc.h:585
hwloc_obj_attr_u::osdev
struct hwloc_obj_attr_u::hwloc_osdev_attr_s osdev
hwloc_obj
Structure of a topology object.
Definition: hwloc.h:339