0849d61e38
feature This commit should fix a hang seen when running some of the one-sided tests. The downside of this fix is it reduces the maximum size of the messages that use the fast boxes. I will fix this in a later commit. To improve performance under a heavy load I introduced sequencing to ensure messages are given to the pml in order. I have seen little-no impact on the message rate or latency with this change and there is a clear improvement to the heavy message rate case. Lets let this sit in the trunk for a couple of days to ensure that everything is working correctly. cmr=v1.8.2:reviewer=jsquyres This commit was SVN r31522.
70 строки
2.3 KiB
C
70 строки
2.3 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 "ompi_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 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_vader_send (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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mca_btl_vader_frag_t *frag = (mca_btl_vader_frag_t *) descriptor;
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if (OPAL_LIKELY(frag->fbox)) {
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mca_btl_vader_fbox_send (frag->fbox, tag, endpoint);
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mca_btl_vader_frag_complete (frag);
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return 1;
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}
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/* header (+ optional inline data) */
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frag->hdr->len = frag->segments[0].seg_len;
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/* type of message, pt-2-pt, one-sided, etc */
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frag->hdr->tag = tag;
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/* post the relative address of the descriptor into the peer's fifo */
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vader_fifo_write_ep (frag->hdr, endpoint);
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if ((frag->hdr->flags & MCA_BTL_VADER_FLAG_SINGLE_COPY) ||
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!(frag->base.des_flags & MCA_BTL_DES_FLAGS_BTL_OWNERSHIP)) {
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frag->base.des_flags |= MCA_BTL_DES_SEND_ALWAYS_CALLBACK;
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return 0;
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}
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/* data is gone (from the pml's perspective). frag callback/release will
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happen later */
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return 1;
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}
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