3401bd2b07
This is required to tighten up the BTL semantics. Ordering is not guaranteed, but, if the BTL returns a order tag in a descriptor (other than MCA_BTL_NO_ORDER) then we may request another descriptor that will obey ordering w.r.t. to the other descriptor. This will allow sane behavior for RDMA networks, where local completion of an RDMA operation on the active side does not imply remote completion on the passive side. If we send a FIN message after local completion and the FIN is not ordered w.r.t. the RDMA operation then badness may occur as the passive side may now try to deregister the memory and the RDMA operation may still be pending on the passive side. Note that this has no impact on networks that don't suffer from this limitation as the ORDER tag can simply always be specified as MCA_BTL_NO_ORDER. This commit was SVN r14768.
252 строки
7.1 KiB
C
252 строки
7.1 KiB
C
/*
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* Copyright (c) 2004-2007 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) 2004-2006 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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* $COPYRIGHT$
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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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/**
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* @file
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*/
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#ifndef MCA_BTL_SELF_H
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#define MCA_BTL_SELF_H
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif /* HAVE_STDLIB_H */
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif /* HAVE_SYS_TYPES_H */
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#include "ompi/class/ompi_free_list.h"
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#include "ompi/class/ompi_bitmap.h"
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#include "ompi/class/ompi_fifo.h"
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#include "opal/event/event.h"
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#include "ompi/mca/pml/pml.h"
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#include "ompi/mca/btl/btl.h"
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#include "ompi/mca/btl/base/base.h"
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#if defined(c_plusplus) || defined(__cplusplus)
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extern "C" {
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#endif
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/**
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* Shared Memory (SELF) BTL module.
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*/
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struct mca_btl_self_component_t {
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mca_btl_base_component_1_0_1_t super; /**< base BTL component */
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int free_list_num; /**< initial size of free lists */
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int free_list_max; /**< maximum size of free lists */
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int free_list_inc; /**< number of elements to alloc when growing free lists */
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opal_mutex_t self_lock;
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ompi_free_list_t self_frags_eager; /**< free list of self first */
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ompi_free_list_t self_frags_send; /**< free list of self second */
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ompi_free_list_t self_frags_rdma; /**< free list of self second */
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mca_btl_base_recv_reg_t self_reg[256];
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};
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typedef struct mca_btl_self_component_t mca_btl_self_component_t;
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OMPI_MODULE_DECLSPEC extern mca_btl_self_component_t mca_btl_self_component;
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/**
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* Register shared memory module parameters with the MCA framework
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*/
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int mca_btl_self_component_open(void);
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/**
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* Any final cleanup before being unloaded.
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*/
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int mca_btl_self_component_close(void);
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/**
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* SELF module initialization.
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*
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* @param num_btls (OUT) Number of BTLs returned in BTL array.
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* @param enable_progress_threads (IN) Flag indicating whether BTL is allowed to have progress threads
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* @param enable_mpi_threads (IN) Flag indicating whether BTL must support multilple simultaneous invocations from different threads
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*
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*/
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mca_btl_base_module_t** mca_btl_self_component_init(
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int *num_btls,
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bool enable_progress_threads,
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bool enable_mpi_threads
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);
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extern mca_btl_base_module_t mca_btl_self;
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/**
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* Cleanup any resources held by the BTL.
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*
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* @param btl BTL instance.
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* @return OMPI_SUCCESS or error status on failure.
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*/
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int mca_btl_self_finalize(
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struct mca_btl_base_module_t* btl
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);
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/**
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* PML->BTL notification of change in the process list.
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* PML->BTL Notification that a receive fragment has been matched.
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* Called for message that is send from process with the virtual
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* address of the shared memory segment being different than that of
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* the receiver.
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*
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* @param btl (IN)
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* @param proc (IN)
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* @param peer (OUT)
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* @return OMPI_SUCCESS or error status on failure.
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*
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*/
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int mca_btl_self_add_procs(
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struct mca_btl_base_module_t* btl,
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size_t nprocs,
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struct ompi_proc_t **procs,
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struct mca_btl_base_endpoint_t** peers,
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struct ompi_bitmap_t* reachability
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);
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/**
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* PML->BTL notification of change in the process list.
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*
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* @param btl (IN) BTL instance
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* @param proc (IN) Peer process
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* @param peer (IN) Peer addressing information.
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* @return Status indicating if cleanup was successful
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*
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*/
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int mca_btl_self_del_procs(
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struct mca_btl_base_module_t* btl,
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size_t nprocs,
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struct ompi_proc_t **procs,
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struct mca_btl_base_endpoint_t **peers
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);
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/**
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* Register a callback function that is called on receipt
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* of a fragment.
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*
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* @param btl (IN) BTL module
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* @return Status indicating if cleanup was successful
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*
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* When the process list changes, the PML notifies the BTL of the
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* change, to provide the opportunity to cleanup or release any
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* resources associated with the peer.
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*/
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int mca_btl_self_register(
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struct mca_btl_base_module_t* btl,
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mca_btl_base_tag_t tag,
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mca_btl_base_module_recv_cb_fn_t cbfunc,
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void* cbdata
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);
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/**
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* Allocate a segment.
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*
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* @param btl (IN) BTL module
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* @param size (IN) Request segment size.
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*/
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mca_btl_base_descriptor_t* mca_btl_self_alloc(
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struct mca_btl_base_module_t* btl,
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uint8_t order,
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size_t size
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);
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/**
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* Return a segment allocated by this BTL.
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*
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* @param btl (IN) BTL module
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* @param segment (IN) Allocated segment.
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*/
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int mca_btl_self_free(
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struct mca_btl_base_module_t* btl,
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mca_btl_base_descriptor_t* segment
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);
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/**
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* Pack data
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*
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* @param btl (IN) BTL module
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* @param peer (IN) BTL peer addressing
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*/
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struct mca_btl_base_descriptor_t* mca_btl_self_prepare_src(
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struct mca_btl_base_module_t* btl,
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struct mca_btl_base_endpoint_t* endpoint,
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struct mca_mpool_base_registration_t* registration,
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struct ompi_convertor_t* convertor,
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uint8_t order,
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size_t reserve,
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size_t* size
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);
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/**
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* Prepare data for RDMA
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*
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* @param btl (IN) BTL module
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* @param peer (IN) BTL peer addressing
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*/
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struct mca_btl_base_descriptor_t* mca_btl_self_prepare_dst(
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struct mca_btl_base_module_t* btl,
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struct mca_btl_base_endpoint_t* endpoint,
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struct mca_mpool_base_registration_t* registration,
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struct ompi_convertor_t* convertor,
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uint8_t order,
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size_t reserve,
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size_t* size
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);
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/**
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* Initiate a send to the peer.
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*
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* @param btl (IN) BTL module
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* @param peer (IN) BTL peer addressing
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*/
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int mca_btl_self_send(
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struct mca_btl_base_module_t* btl,
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struct mca_btl_base_endpoint_t* endpoint,
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struct mca_btl_base_descriptor_t* descriptor,
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mca_btl_base_tag_t tag
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);
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/**
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* Initiate a put to the peer.
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*
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* @param btl (IN) BTL module
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* @param peer (IN) BTL peer addressing
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*/
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int mca_btl_self_rdma(
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struct mca_btl_base_module_t* btl,
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struct mca_btl_base_endpoint_t* endpoint,
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struct mca_btl_base_descriptor_t* descriptor
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);
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/**
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* Fault Tolerance Event Notification Function
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* @param state Checkpoint Stae
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* @return OMPI_SUCCESS or failure status
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*/
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int mca_btl_self_ft_event(int state);
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#if defined(c_plusplus) || defined(__cplusplus)
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}
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#endif
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#endif
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