2fb7c344fc
Configure Option: --enable-sysv MCA Parameter: mpi_common_sm mpi_common_sm accepts a comma delimited list of: [sysv],mmap (order dependent). The first component that is successfully selected is used. For example, -mca mpi_common_sm sysv,mmap will first try sysv. If sysv is not successfully selected, then mmap will be used. mmap will be used if mpi_common_sm is not provided. Notes: Please make certain that your system's shmmax limit, or equivalent, is larger than mpool_sm_min_size. Otherwise, shmget may fail. This commit was SVN r23260.
135 строки
4.6 KiB
C
135 строки
4.6 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2009 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2010 Los Alamos National Security, LLC.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#ifndef _COMMON_SM_MMAP_H_
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#define _COMMON_SM_MMAP_H_
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#include "ompi_config.h"
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#include "opal/class/opal_object.h"
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#include "opal/class/opal_list.h"
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#include "opal/sys/atomic.h"
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#include "ompi/mca/mpool/mpool.h"
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#include "ompi/proc/proc.h"
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#include "ompi/group/group.h"
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#include "ompi/mca/common/sm/common_sm.h"
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BEGIN_C_DECLS
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struct mca_mpool_base_module_t;
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typedef struct mca_common_sm_module_mmap_t
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{
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mca_common_sm_module_t super;
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} mca_common_sm_module_mmap_t;
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OBJ_CLASS_DECLARATION(mca_common_sm_module_mmap_t);
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/**
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* This routine is used to set up a shared memory file, backed
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* by a specified file. It is assumed that the file does not
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* exist before any of the current set of processes try and open
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* it.
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*
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* @param procs - array of (ompi_proc_t*)'s to create this shared
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* memory segment for. This array must be writable; it may be edited
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* (in undefined ways) if the array contains procs that are not on
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* this host. It is assumed that the caller will simply free this
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* array upon return. (INOUT)
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*
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* @param num_procs - length of the procs array (IN)
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*
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* @param size - size of the file, in bytes (IN)
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*
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* @param file_name name of file to be opened. (IN)
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*
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* @param size_ctl_structure size of the control structure at
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* the head of the file. The control structure
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* is assumed to have mca_common_sm_seg_header_t
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* as its first segment (IN)
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*
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* @param data_set_alignment alignment of the data segment. this
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* follows the control structure. If this
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* value if 0, then assume that there will
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* be no data segment following the control
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* structure. (IN)
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*
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* @return value pointer to control structure at head of file.
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*/
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OMPI_DECLSPEC extern mca_common_sm_module_t *
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mca_common_sm_mmap_init(ompi_proc_t **procs,
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size_t num_procs,
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size_t size,
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char *file_name,
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size_t size_ctl_structure,
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size_t data_seg_alignment);
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/**
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* This routine is used to set up a shared memory file, backed
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* by a specified file. It is assumed that the file does not
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* exist before any of the current set of processes try and open
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* it.
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*
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* This routine is the same as mca_common_sm_mmap_init() except that
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* it takes an (ompi_group_t*) parameter to specify the peers rather
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* than an array of procs. Unlike mca_common_sm_mmap_init(), the
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* group must contain *only* local peers, or this function will return
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* NULL and not create any shared memory segment.
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*/
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OMPI_DECLSPEC extern mca_common_sm_module_t *
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mca_common_sm_mmap_init_group(ompi_group_t *group,
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size_t size,
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char *file_name,
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size_t size_ctl_structure,
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size_t data_seg_alignment);
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/*
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* Callback from the sm mpool
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*/
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OMPI_DECLSPEC extern void *
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mca_common_sm_mmap_seg_alloc(struct mca_mpool_base_module_t *mpool,
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size_t *size,
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mca_mpool_base_registration_t **registration);
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/**
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* This function will release all local resources attached to the
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* mmapped file. We assume that the operating system will destroy the
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* file when the last process release it.
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*
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* @param sm_mmap - the control structure at head of file.
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*
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* @returnvalue 0 if everything was OK, otherwise a negative value.
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*/
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OMPI_DECLSPEC extern int
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mca_common_sm_mmap_fini(mca_common_sm_module_t *mca_common_sm_module);
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/**
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* component query routine
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*/
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OMPI_DECLSPEC extern int
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mca_common_sm_mmap_component_query(void);
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END_C_DECLS
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#endif
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