mirror of https://github.com/xzeldon/htop.git
108 lines
2.5 KiB
C
108 lines
2.5 KiB
C
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/*
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* Copyright © 2010 INRIA. All rights reserved.
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* Copyright © 2011 Cisco Systems, Inc. All rights reserved.
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* See COPYING in top-level directory.
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*/
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/** \file
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* \brief Macros to help interaction between hwloc and Myrinet Express.
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*
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* Applications that use both hwloc and Myrinet Express verbs may want to
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* include this file so as to get topology information for Myrinet hardware.
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*
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*/
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#ifndef HWLOC_MYRIEXPRESS_H
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#define HWLOC_MYRIEXPRESS_H
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#include <hwloc.h>
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#include <hwloc/autogen/config.h>
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#include <hwloc/linux.h>
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#include <myriexpress.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** \defgroup hwlocality_myriexpress Myrinet Express-Specific Functions
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* @{
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*/
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/** \brief Get the CPU set of logical processors that are physically
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* close the MX board \p id.
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*
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* For the given Myrinet Express board index \p id, read the
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* OS-provided NUMA node and return the corresponding CPU set.
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*/
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static __hwloc_inline int
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hwloc_mx_board_get_device_cpuset(hwloc_topology_t topology,
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unsigned id, hwloc_cpuset_t set)
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{
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uint32_t in, out;
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in = id;
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if (mx_get_info(NULL, MX_NUMA_NODE, &in, sizeof(in), &out, sizeof(out)) != MX_SUCCESS) {
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errno = EINVAL;
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return -1;
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}
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if (out != (uint32_t) -1) {
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hwloc_obj_t obj = NULL;
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while ((obj = hwloc_get_next_obj_by_type(topology, HWLOC_OBJ_NODE, obj)) != NULL)
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if (obj->os_index == out) {
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hwloc_bitmap_copy(set, obj->cpuset);
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goto out;
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}
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}
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/* fallback to the full topology cpuset */
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hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
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out:
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return 0;
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}
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/** \brief Get the CPU set of logical processors that are physically
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* close to endpoint \p endpoint.
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*
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* For the given Myrinet Express endpoint \p endpoint, read the
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* OS-provided NUMA node and return the corresponding CPU set.
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*/
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static __hwloc_inline int
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hwloc_mx_endpoint_get_device_cpuset(hwloc_topology_t topology,
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mx_endpoint_t endpoint, hwloc_cpuset_t set)
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{
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uint64_t nid;
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uint32_t nindex, eid;
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mx_endpoint_addr_t eaddr;
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if (mx_get_endpoint_addr(endpoint, &eaddr) != MX_SUCCESS) {
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errno = EINVAL;
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return -1;
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}
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if (mx_decompose_endpoint_addr(eaddr, &nid, &eid) != MX_SUCCESS) {
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errno = EINVAL;
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return -1;
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}
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if (mx_nic_id_to_board_number(nid, &nindex) != MX_SUCCESS) {
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errno = EINVAL;
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return -1;
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}
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return hwloc_mx_board_get_device_cpuset(topology, nindex, set);
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}
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/** @} */
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* HWLOC_MYRIEXPRESS_H */
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