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.
99 строки
3.4 KiB
C
99 строки
3.4 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
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/*
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* Copyright (c) 2004-2011 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) 2004-2007 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) 2006-2007 Voltaire. All rights reserved.
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* Copyright (c) 2009 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2010-2013 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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#include "opal_config.h"
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#include "btl_vader.h"
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#include "btl_vader_frag.h"
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#include "btl_vader_fifo.h"
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#include "btl_vader_fbox.h"
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/**
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* Initiate an inline 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_vader_sendi (struct mca_btl_base_module_t *btl,
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struct mca_btl_base_endpoint_t *endpoint,
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struct opal_convertor_t *convertor,
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void *header, size_t header_size,
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size_t payload_size, uint8_t order,
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uint32_t flags, mca_btl_base_tag_t tag,
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mca_btl_base_descriptor_t **descriptor)
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{
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mca_btl_vader_frag_t *frag;
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void *data_ptr = NULL;
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size_t length;
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if (payload_size) {
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opal_convertor_get_current_pointer (convertor, &data_ptr);
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}
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if (!(payload_size && opal_convertor_need_buffers (convertor)) &&
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mca_btl_vader_fbox_sendi (endpoint, tag, header, header_size, data_ptr, payload_size)) {
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return OPAL_SUCCESS;
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}
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length = header_size + payload_size;
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/* allocate a fragment, giving up if we can't get one */
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frag = (mca_btl_vader_frag_t *) mca_btl_vader_alloc (btl, endpoint, order, length,
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flags | MCA_BTL_DES_FLAGS_BTL_OWNERSHIP);
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if (OPAL_UNLIKELY(NULL == frag)) {
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*descriptor = NULL;
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return OPAL_ERR_OUT_OF_RESOURCE;
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}
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/* fill in fragment fields */
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frag->hdr->len = length;
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frag->hdr->tag = tag;
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/* write the match header (with MPI comm/tag/etc. info) */
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memcpy (frag->segments[0].seg_addr.pval, header, header_size);
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/* write the message data if there is any */
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/* we can't use single-copy semantics here since as caller will consider the send
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complete when we return */
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if (payload_size) {
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uint32_t iov_count = 1;
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struct iovec iov;
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/* pack the data into the supplied buffer */
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iov.iov_base = (IOVBASE_TYPE *)((uintptr_t)frag->segments[0].seg_addr.pval + header_size);
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iov.iov_len = length = payload_size;
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(void) opal_convertor_pack (convertor, &iov, &iov_count, &length);
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assert (length == payload_size);
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}
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/* write the fragment pointer to peer's the FIFO. the progress function will return the fragment */
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vader_fifo_write_ep (frag->hdr, endpoint);
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return OPAL_SUCCESS;
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}
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