86 строки
2.7 KiB
C
86 строки
2.7 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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* $COPYRIGHT$
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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_sm_frag.h"
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/**
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* Internal alignment for the SM BTL. Don't know yet if it's interesting to export it
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* via the MCA parameters. It might make sense on some NUMA machines to have the
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* fragments aligned on 64 bits instead ...
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* What we really need here is to have the header on the same cache line to
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* speed-up the access to the header information.
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*/
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#define BTL_SM_ALIGNMENT_TO 32
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static inline void mca_btl_sm_frag_constructor(mca_btl_sm_frag_t* frag)
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{
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size_t alignment;
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frag->segment.seg_addr.pval = frag+1;
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alignment = (size_t)((unsigned long)frag->segment.seg_addr.pval &
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(unsigned long)(BTL_SM_ALIGNMENT_TO - 1));
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if( 0 != alignment ) {
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unsigned long ptr = (unsigned long)frag->segment.seg_addr.pval;
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alignment = BTL_SM_ALIGNMENT_TO - alignment;
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ptr += alignment;
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frag->segment.seg_addr.pval = (void*)ptr;
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}
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frag->segment.seg_len = frag->size - alignment;
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frag->base.des_src = &frag->segment;
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frag->base.des_src_cnt = 1;
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frag->base.des_dst = &frag->segment;
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frag->base.des_dst_cnt = 1;
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frag->base.des_flags = 0;
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}
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static void mca_btl_sm_frag1_constructor(mca_btl_sm_frag_t* frag)
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{
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frag->size = mca_btl_sm_component.eager_limit;
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mca_btl_sm_frag_constructor(frag);
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}
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static void mca_btl_sm_frag2_constructor(mca_btl_sm_frag_t* frag)
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{
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frag->size = mca_btl_sm_component.max_frag_size;
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mca_btl_sm_frag_constructor(frag);
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}
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static void mca_btl_sm_frag_destructor(mca_btl_sm_frag_t* frag)
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{
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}
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OBJ_CLASS_INSTANCE(
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mca_btl_sm_frag_t,
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mca_btl_base_descriptor_t,
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mca_btl_sm_frag_constructor,
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mca_btl_sm_frag_destructor);
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OBJ_CLASS_INSTANCE(
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mca_btl_sm_frag1_t,
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mca_btl_base_descriptor_t,
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mca_btl_sm_frag1_constructor,
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mca_btl_sm_frag_destructor);
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OBJ_CLASS_INSTANCE(
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mca_btl_sm_frag2_t,
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mca_btl_base_descriptor_t,
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mca_btl_sm_frag2_constructor,
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mca_btl_sm_frag_destructor);
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