d624e0d60f
Sequence numbers will wrap around; it is not sufficient to check for (seq-1) -- must use the SEQ_DIFF macro to properly handle the wraparound. This bug wasn't serious; it just meant we might retransmit one or two extra times when retransmits were triggerd and the sequence numbers wrapped around their sliding windows.
108 строки
4.2 KiB
C
108 строки
4.2 KiB
C
/*
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* Copyright (c) 2013-2016 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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#include "btl_usnic_compat.h"
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/* Invoke the descriptor callback for a (non-PUT) send frag, updating
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* stats and clearing the _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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#if BTL_VERSION == 30
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/* Invoke the descriptor callback for a send frag that was a PUT,
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* updating stats and clearing the _CALLBACK flag in the process. */
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#define OPAL_BTL_USNIC_DO_PUT_FRAG_CB(module, send_frag, comment) \
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do { \
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MSGDEBUG1_OUT("%s:%d: %s PUT 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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mca_btl_base_rdma_completion_fn_t func = \
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(mca_btl_base_rdma_completion_fn_t) \
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(send_frag)->sf_base.uf_base.des_cbfunc; \
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func(&(module)->super, \
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(send_frag)->sf_endpoint, \
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(send_frag)->sf_base.uf_local_seg[0].seg_addr.pval, \
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NULL, \
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(send_frag)->sf_base.uf_base.des_context, \
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(send_frag)->sf_base.uf_base.des_cbdata, \
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OPAL_SUCCESS); \
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++((module)->stats.pml_send_callbacks); \
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} while (0)
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#endif
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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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SEQ_DIFF(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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