openfabrics-verbs.h
/*
* Copyright © 2009 CNRS
* Copyright © 2009-2021 Inria. All rights reserved.
* Copyright © 2009-2010 Université Bordeaux
* Copyright © 2009-2011 Cisco Systems, Inc. All rights reserved.
* See COPYING in top-level directory.
*/
#ifndef HWLOC_OPENFABRICS_VERBS_H
#define HWLOC_OPENFABRICS_VERBS_H
#include "hwloc.h"
#include "hwloc/autogen/config.h"
#ifdef HWLOC_LINUX_SYS
#include "hwloc/linux.h"
#endif
#include <infiniband/verbs.h>
#ifdef __cplusplus
extern "C" {
#endif
static __hwloc_inline int
hwloc_ibv_get_device_cpuset(hwloc_topology_t topology __hwloc_attribute_unused,
struct ibv_device *ibdev, hwloc_cpuset_t set)
{
#ifdef HWLOC_LINUX_SYS
/* If we're on Linux, use the verbs-provided sysfs mechanism to
get the local cpus */
#define HWLOC_OPENFABRICS_VERBS_SYSFS_PATH_MAX 128
char path[HWLOC_OPENFABRICS_VERBS_SYSFS_PATH_MAX];
if (!hwloc_topology_is_thissystem(topology)) {
errno = EINVAL;
return -1;
}
sprintf(path, "/sys/class/infiniband/%s/device/local_cpus",
ibv_get_device_name(ibdev));
if (hwloc_linux_read_path_as_cpumask(path, set) < 0
|| hwloc_bitmap_iszero(set))
hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
#else
/* Non-Linux systems simply get a full cpuset */
hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
#endif
return 0;
}
static __hwloc_inline hwloc_obj_t
hwloc_ibv_get_device_osdev_by_name(hwloc_topology_t topology,
const char *ibname)
{
hwloc_obj_t osdev = NULL;
while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
if (HWLOC_OBJ_OSDEV_OPENFABRICS == osdev->attr->osdev.type
&& osdev->name && !strcmp(ibname, osdev->name))
return osdev;
}
return NULL;
}
static __hwloc_inline hwloc_obj_t
hwloc_ibv_get_device_osdev(hwloc_topology_t topology,
struct ibv_device *ibdev)
{
if (!hwloc_topology_is_thissystem(topology)) {
errno = EINVAL;
return NULL;
}
return hwloc_ibv_get_device_osdev_by_name(topology, ibv_get_device_name(ibdev));
}
#ifdef __cplusplus
} /* extern "C" */
#endif
#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, "hfi1_0" Omni-Path int...
Definition: hwloc.h:347
hwloc_topology_t
struct hwloc_topology * hwloc_topology_t
Topology context.
Definition: hwloc.h:692
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:1194
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:106
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:134
hwloc_obj
Structure of a topology object.
Definition: hwloc.h:396
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:408
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:415
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:666