552c9ca5a0
WHAT: Open our low-level communication infrastructure by moving all necessary components (btl/rcache/allocator/mpool) down in OPAL All the components required for inter-process communications are currently deeply integrated in the OMPI layer. Several groups/institutions have express interest in having a more generic communication infrastructure, without all the OMPI layer dependencies. This communication layer should be made available at a different software level, available to all layers in the Open MPI software stack. As an example, our ORTE layer could replace the current OOB and instead use the BTL directly, gaining access to more reactive network interfaces than TCP. Similarly, external software libraries could take advantage of our highly optimized AM (active message) communication layer for their own purpose. UTK with support from Sandia, developped a version of Open MPI where the entire communication infrastucture has been moved down to OPAL (btl/rcache/allocator/mpool). Most of the moved components have been updated to match the new schema, with few exceptions (mainly BTLs where I have no way of compiling/testing them). Thus, the completion of this RFC is tied to being able to completing this move for all BTLs. For this we need help from the rest of the Open MPI community, especially those supporting some of the BTLs. A non-exhaustive list of BTLs that qualify here is: mx, portals4, scif, udapl, ugni, usnic. This commit was SVN r32317.
123 строки
4.3 KiB
C
123 строки
4.3 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
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/*
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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) 2004-2009 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) 2008 Sun Microsystems, Inc. All rights reserved.
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* Copyright (c) 2009 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2011-2013 Los Alamos National Security, LLC. All rights
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* 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 MCA_BTL_VADER_SEND_FRAG_H
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#define MCA_BTL_VADER_SEND_FRAG_H
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#include "opal_config.h"
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enum {
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MCA_BTL_VADER_FLAG_INLINE = 0,
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MCA_BTL_VADER_FLAG_SINGLE_COPY = 1,
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MCA_BTL_VADER_FLAG_COMPLETE = 2,
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};
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struct mca_btl_vader_frag_t;
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struct mca_btl_vader_fbox_t;
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struct mca_btl_vader_hdr_t {
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volatile intptr_t next; /* next item in fifo. many peers may touch this */
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struct mca_btl_vader_frag_t *frag;
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mca_btl_base_tag_t tag; /* tag associated with this fragment (used to lookup callback) */
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uint8_t flags; /* vader send flags */
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uint16_t seqn;
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int32_t len; /* length of data following this header */
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struct iovec sc_iov; /* io vector containing pointer to single-copy data */
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};
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typedef struct mca_btl_vader_hdr_t mca_btl_vader_hdr_t;
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/**
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* shared memory send fragment derived type.
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*/
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struct mca_btl_vader_frag_t {
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mca_btl_base_descriptor_t base;
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mca_btl_base_segment_t segments[2];
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struct mca_btl_base_endpoint_t *endpoint;
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struct mca_btl_vader_fbox_t *fbox;
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mca_btl_vader_hdr_t *hdr; /* in the shared memory region */
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ompi_free_list_t *my_list;
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};
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typedef struct mca_btl_vader_frag_t mca_btl_vader_frag_t;
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static inline int mca_btl_vader_frag_alloc (mca_btl_vader_frag_t **frag, ompi_free_list_t *list,
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struct mca_btl_base_endpoint_t *endpoint) {
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ompi_free_list_item_t *item;
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OMPI_FREE_LIST_GET_MT(list, item);
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*frag = (mca_btl_vader_frag_t *) item;
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if (OPAL_LIKELY(NULL != item)) {
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if (NULL == (*frag)->hdr) {
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OMPI_FREE_LIST_RETURN_MT(list, (ompi_free_list_item_t *)*frag);
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*frag = NULL;
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return OPAL_ERR_TEMP_OUT_OF_RESOURCE;
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}
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(*frag)->endpoint = endpoint;
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}
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return OPAL_SUCCESS;
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}
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static inline void mca_btl_vader_frag_return (mca_btl_vader_frag_t *frag)
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{
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frag->hdr->flags = 0;
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frag->segments[0].seg_addr.pval = (char *)(frag->hdr + 1);
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frag->base.des_local_count = 1;
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frag->fbox = NULL;
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OMPI_FREE_LIST_RETURN_MT(frag->my_list, (ompi_free_list_item_t *)frag);
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}
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OBJ_CLASS_DECLARATION(mca_btl_vader_frag_t);
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#define MCA_BTL_VADER_FRAG_ALLOC_EAGER(frag, endpoint) \
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mca_btl_vader_frag_alloc (&(frag), &mca_btl_vader_component.vader_frags_eager, endpoint)
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#if !OPAL_BTL_VADER_HAVE_XPMEM
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#define MCA_BTL_VADER_FRAG_ALLOC_MAX(frag, endpoint) \
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mca_btl_vader_frag_alloc (&(frag), &mca_btl_vader_component.vader_frags_max_send, endpoint)
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#endif
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#define MCA_BTL_VADER_FRAG_ALLOC_USER(frag, endpoint) \
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mca_btl_vader_frag_alloc (&(frag), &mca_btl_vader_component.vader_frags_user, endpoint)
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#define MCA_BTL_VADER_FRAG_RETURN(frag) mca_btl_vader_frag_return(frag)
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static inline void mca_btl_vader_frag_complete (mca_btl_vader_frag_t *frag) {
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if (OPAL_UNLIKELY(MCA_BTL_DES_SEND_ALWAYS_CALLBACK & frag->base.des_flags)) {
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/* completion callback */
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frag->base.des_cbfunc(&mca_btl_vader.super, frag->endpoint,
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&frag->base, OPAL_SUCCESS);
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}
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if (OPAL_LIKELY(frag->base.des_flags & MCA_BTL_DES_FLAGS_BTL_OWNERSHIP)) {
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MCA_BTL_VADER_FRAG_RETURN(frag);
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}
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}
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void mca_btl_vader_frag_init (ompi_free_list_item_t *item, void *ctx);
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#endif /* MCA_BTL_VADER_SEND_FRAG_H */
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