Portable Hardware Locality (hwloc) Documentation: v1.4.2

00001 /*
00002  * Copyright © 2009 CNRS
00003  * Copyright © 2009-2012 inria.  All rights reserved.
00004  * Copyright © 2009-2010 Université Bordeaux 1
00005  * Copyright © 2009-2011 Cisco Systems, Inc.  All rights reserved.
00006  * See COPYING in top-level directory.
00007  */
00008 
00019 #ifndef HWLOC_OPENFABRICS_VERBS_H
00020 #define HWLOC_OPENFABRICS_VERBS_H
00021 
00022 #include <hwloc.h>
00023 #include <hwloc/autogen/config.h>
00024 #include <hwloc/linux.h>
00025 
00026 #include <infiniband/verbs.h>
00027 
00028 
00029 #ifdef __cplusplus
00030 extern "C" {
00031 #endif
00032 
00033 
00048 static __hwloc_inline int
00049 hwloc_ibv_get_device_cpuset(hwloc_topology_t topology __hwloc_attribute_unused,
00050                             struct ibv_device *ibdev, hwloc_cpuset_t set)
00051 {
00052 #ifdef HWLOC_LINUX_SYS
00053   /* If we're on Linux, use the verbs-provided sysfs mechanism to
00054      get the local cpus */
00055 #define HWLOC_OPENFABRICS_VERBS_SYSFS_PATH_MAX 128
00056   char path[HWLOC_OPENFABRICS_VERBS_SYSFS_PATH_MAX];
00057   FILE *sysfile = NULL;
00058 
00059   sprintf(path, "/sys/class/infiniband/%s/device/local_cpus",
00060           ibv_get_device_name(ibdev));
00061   sysfile = fopen(path, "r");
00062   if (!sysfile)
00063     return -1;
00064 
00065   hwloc_linux_parse_cpumap_file(sysfile, set);
00066   if (hwloc_bitmap_iszero(set))
00067     hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
00068 
00069   fclose(sysfile);
00070 #else
00071   /* Non-Linux systems simply get a full cpuset */
00072   hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
00073 #endif
00074   return 0;
00075 }
00076 
00080 #ifdef __cplusplus
00081 } /* extern "C" */
00082 #endif
00083 
00084 
00085 #endif /* HWLOC_OPENFABRICS_VERBS_H */