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.
85 строки
2.8 KiB
C
85 строки
2.8 KiB
C
/*
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* Copyright (c) 2013-2014 Cisco Systems, Inc. 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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#ifndef BTL_USNIC_ACK_H
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#define BTL_USNIC_ACK_H
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#include "opal_config.h"
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#include "opal/class/opal_hotel.h"
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#include "btl_usnic.h"
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#include "btl_usnic_frag.h"
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#include "btl_usnic_endpoint.h"
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/* Invoke the descriptor callback for the frag, updating stats and clearing the
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* _CALLBACK flag in the process. */
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#define OPAL_BTL_USNIC_DO_SEND_FRAG_CB(module, send_frag, comment) \
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do { \
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MSGDEBUG1_OUT("%s:%d: %s send callback for module=%p frag=%p\n", \
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__func__, __LINE__, \
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(comment), (void *)(module), (void *)(send_frag)); \
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(send_frag)->sf_base.uf_base.des_cbfunc( \
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&(module)->super, \
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(send_frag)->sf_endpoint, \
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&(send_frag)->sf_base.uf_base, \
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OPAL_SUCCESS); \
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frag->sf_base.uf_base.des_flags &= ~MCA_BTL_DES_SEND_ALWAYS_CALLBACK; \
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++((module)->stats.pml_send_callbacks); \
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} while (0)
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/*
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* Reap an ACK send that is complete
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*/
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void opal_btl_usnic_ack_complete(opal_btl_usnic_module_t *module,
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opal_btl_usnic_ack_segment_t *ack);
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/*
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* Send an ACK
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*/
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void opal_btl_usnic_ack_send(opal_btl_usnic_module_t *module,
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opal_btl_usnic_endpoint_t *endpoint);
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/*
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* Callback for when a send times out without receiving a
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* corresponding ACK
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*/
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void opal_btl_usnic_ack_timeout(opal_hotel_t *hotel, int room_num,
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void *occupant);
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/*
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* Handle an incoming ACK
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*/
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void opal_btl_usnic_handle_ack(opal_btl_usnic_endpoint_t *endpoint,
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opal_btl_usnic_seq_t ack_seq);
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static inline void
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opal_btl_usnic_piggyback_ack(
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opal_btl_usnic_endpoint_t *endpoint,
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opal_btl_usnic_send_segment_t *sseg)
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{
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/* If ACK is needed, piggy-back it here and send it on */
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if (endpoint->endpoint_ack_needed) {
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opal_btl_usnic_remove_from_endpoints_needing_ack(endpoint);
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sseg->ss_base.us_btl_header->ack_seq =
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endpoint->endpoint_next_contig_seq_to_recv - 1;
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sseg->ss_base.us_btl_header->ack_present = 1;
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#if MSGDEBUG1
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opal_output(0, "Piggy-backing ACK for sequence %"UDSEQ"\n",
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sseg->ss_base.us_btl_header->ack_seq);
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#endif
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} else {
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sseg->ss_base.us_btl_header->ack_present = 0;
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}
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}
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#endif /* BTL_USNIC_ACK_H */
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