diff options
Diffstat (limited to 'hwloc-1.2.1/include/hwloc/openfabrics-verbs.h')
-rw-r--r-- | hwloc-1.2.1/include/hwloc/openfabrics-verbs.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/hwloc-1.2.1/include/hwloc/openfabrics-verbs.h b/hwloc-1.2.1/include/hwloc/openfabrics-verbs.h new file mode 100644 index 00000000..197b40b8 --- /dev/null +++ b/hwloc-1.2.1/include/hwloc/openfabrics-verbs.h @@ -0,0 +1,81 @@ +/* + * Copyright © 2009 CNRS + * Copyright © 2009-2010 INRIA. All rights reserved. + * Copyright © 2009-2010 Université Bordeaux 1 + * Copyright © 2009-2011 Cisco Systems, Inc. All rights reserved. + * See COPYING in top-level directory. + */ + +/** \file + * \brief Macros to help interaction between hwloc and OpenFabrics + * verbs. + * + * Applications that use both hwloc and OpenFabrics verbs may want to + * include this file so as to get topology information for OpenFabrics + * hardware. + * + */ + +#ifndef HWLOC_OPENFABRICS_VERBS_H +#define HWLOC_OPENFABRICS_VERBS_H + +#include <hwloc.h> +#include <hwloc/autogen/config.h> +#include <hwloc/linux.h> + +#include <infiniband/verbs.h> + + +#ifdef __cplusplus +extern "C" { +#endif + + +/** \defgroup hwlocality_openfabrics OpenFabrics-Specific Functions + * @{ + */ + +/** \brief Get the CPU set of logical processors that are physically + * close to device \p ibdev. + * + * For the given OpenFabrics device \p ibdev, read the corresponding + * kernel-provided cpumap file and return the corresponding CPU set. + * This function is currently only implemented in a meaningful way for + * Linux; other systems will simply get a full cpuset. + */ +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]; + FILE *sysfile = NULL; + + sprintf(path, "/sys/class/infiniband/%s/device/local_cpus", + ibv_get_device_name(ibdev)); + sysfile = fopen(path, "r"); + if (!sysfile) + return -1; + + hwloc_linux_parse_cpumap_file(sysfile, set); + + fclose(sysfile); +#else + /* Non-Linux systems simply get a full cpuset */ + hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology)); +#endif + return 0; +} + +/** @} */ + + +#ifdef __cplusplus +} /* extern "C" */ +#endif + + +#endif /* HWLOC_OPENFABRICS_VERBS_H */ |