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Portable Hardware Locality (hwloc) Documentation: v1.8

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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))
86 
87  fclose(sysfile);
88 #else
89  /* Non-Linux systems simply get a full cpuset */
91 #endif
92  return 0;
93 }
94 
109 static __hwloc_inline hwloc_obj_t
111  const char *ibname)
112 {
113  hwloc_obj_t osdev = NULL;
114  while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
116  && osdev->name && !strcmp(ibname, osdev->name))
117  return osdev;
118  }
119  return NULL;
120 }
121 
136 static __hwloc_inline hwloc_obj_t
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_DECLSPEC int hwloc_topology_is_thissystem(hwloc_topology_t __hwloc_restrict topology) __hwloc_attribute_pure
Does the topology context come from this system?
HWLOC_DECLSPEC int hwloc_linux_parse_cpumap_file(FILE *file, hwloc_cpuset_t set)
Convert a linux kernel cpumap file file into hwloc CPU set.
Structure of a topology object.
Definition: hwloc.h:331
HWLOC_DECLSPEC 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.
Operating system openfabrics device. For instance the &quot;mlx4_0&quot; InfiniBand HCA device on Linux...
Definition: hwloc.h:266
static __hwloc_inline hwloc_const_cpuset_t hwloc_topology_get_complete_cpuset(hwloc_topology_t topology) __hwloc_attribute_pure
Get complete CPU set.
Definition: helper.h:726
struct hwloc_obj_attr_u::hwloc_osdev_attr_s osdev
hwloc_obj_osdev_type_t type
Definition: hwloc.h:520
char * name
Object description if any.
Definition: hwloc.h:335
static __hwloc_inline 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:1175
static __hwloc_inline int hwloc_ibv_get_device_cpuset(hwloc_topology_t topology __hwloc_attribute_unused, 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
static __hwloc_inline 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
union hwloc_obj_attr_u * attr
Object type-specific Attributes, may be NULL if no attribute value was found.
Definition: hwloc.h:339
HWLOC_DECLSPEC int hwloc_bitmap_iszero(hwloc_const_bitmap_t bitmap) __hwloc_attribute_pure
Test whether bitmap bitmap is empty.
struct hwloc_topology * hwloc_topology_t
Topology context.
Definition: hwloc.h:577
static __hwloc_inline 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_bitmap_t hwloc_cpuset_t
A CPU set is a bitmap whose bits are set according to CPU physical OS indexes.
Definition: hwloc.h:116