mpid_nem_inline.h 30.7 KB
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/* -*- Mode: C; c-basic-offset:4 ; -*- */
/*
 *  (C) 2006 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */

#ifndef _MPID_NEM_INLINE_H
#define _MPID_NEM_INLINE_H

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#define MPID_NEM_POLLS_BEFORE_YIELD 1000
#define MPID_NEM_THREAD_POLLS_BEFORE_YIELD 1
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#include "my_papi_defs.h"
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#include "mpiiov.h"
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extern int MPID_nem_lmt_shm_pending;
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extern MPID_nem_cell_ptr_t MPID_nem_prefetched_cell;

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static inline int MPID_nem_mpich2_send_header (void* buf, int size, MPIDI_VC_t *vc, int *again);
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static inline int MPID_nem_mpich2_sendv (MPID_IOV **iov, int *n_iov, MPIDI_VC_t *vc, int *again);
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static inline void MPID_nem_mpich2_dequeue_fastbox (int local_rank);
static inline void MPID_nem_mpich2_enqueue_fastbox (int local_rank);
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static inline int MPID_nem_mpich2_sendv_header (MPID_IOV **iov, int *n_iov, MPIDI_VC_t *vc, int *again);
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static inline int MPID_nem_recv_seqno_matches (MPID_nem_queue_ptr_t qhead);
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static inline int MPID_nem_mpich2_test_recv (MPID_nem_cell_ptr_t *cell, int *in_fbox, int in_blocking_progress);
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static inline int MPID_nem_mpich2_blocking_recv (MPID_nem_cell_ptr_t *cell, int *in_fbox);
static inline int MPID_nem_mpich2_test_recv_wait (MPID_nem_cell_ptr_t *cell, int *in_fbox, int timeout);
static inline int MPID_nem_mpich2_release_cell (MPID_nem_cell_ptr_t cell, MPIDI_VC_t *vc);
static inline void MPID_nem_mpich2_send_seg_header (MPID_Segment *segment, MPIDI_msg_sz_t *segment_first,
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                                                           MPIDI_msg_sz_t segment_size, void *header, MPIDI_msg_sz_t header_sz,
                                                           MPIDI_VC_t *vc, int *again);
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static inline void MPID_nem_mpich2_send_seg (MPID_Segment *segment, MPIDI_msg_sz_t *segment_first, MPIDI_msg_sz_t segment_size,
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                                                    MPIDI_VC_t *vc, int *again);


/* MPID_nem_mpich2_send_header (void* buf, int size, MPIDI_VC_t *vc)
   same as above, but sends MPICH2 32 byte header */
#undef FUNCNAME
#define FUNCNAME MPID_nem_mpich2_send_header
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
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static inline int
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MPID_nem_mpich2_send_header (void* buf, int size, MPIDI_VC_t *vc, int *again)
{
    int mpi_errno = MPI_SUCCESS;
    MPID_nem_cell_ptr_t el;
    int my_rank;
    MPIDI_CH3I_VC *vc_ch = (MPIDI_CH3I_VC *)vc->channel_private;

    /*DO_PAPI (PAPI_reset (PAPI_EventSet)); */

    MPIU_Assert (size == sizeof(MPIDI_CH3_Pkt_t));

    my_rank = MPID_nem_mem_region.rank;

#ifdef USE_FASTBOX
    if (vc_ch->is_local)
    {
	MPID_nem_fbox_mpich2_t *pbox = vc_ch->fbox_out;
	int count = 10;
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	uint32_t *payload_32 = (uint32_t *)pbox->cell.pkt.mpich2.payload;
	uint32_t *buf_32 = (uint32_t *)buf;
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	if (MPID_nem_islocked ((MPID_nem_fbox_common_ptr_t)pbox, 0, count))
	    goto usequeue_l;
	{
	    pbox->cell.pkt.mpich2.source  = MPID_nem_mem_region.local_rank;
	    pbox->cell.pkt.mpich2.datalen = size;
	    pbox->cell.pkt.mpich2.seqno   = vc_ch->send_seqno++;

            MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, pbox->cell.pkt.mpich2.type = MPID_NEM_PKT_MPICH2_HEAD);
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	    payload_32[0] = buf_32[0];
	    payload_32[1] = buf_32[1];
	    payload_32[2] = buf_32[2];
	    payload_32[3] = buf_32[3];
	    payload_32[4] = buf_32[4];
	    payload_32[5] = buf_32[5];
	    payload_32[6] = buf_32[6];
	    payload_32[7] = buf_32[7];
	    if (sizeof(MPIDI_CH3_Pkt_t) == 40) /* This conditional should be optimized out */
	    {
		payload_32[8] = buf_32[8];
		payload_32[9] = buf_32[9];
	    }
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	    OPA_write_barrier();
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	    pbox->flag.value = 1;

	    MPIU_DBG_MSG (CH3_CHANNEL, VERBOSE, "--> Sent fbox ");
	    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, MPID_nem_dbg_dump_cell (&pbox->cell));

	    goto return_success;
	}
    }
 usequeue_l:
#endif /*USE_FASTBOX */
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#ifdef PREFETCH_CELL
    DO_PAPI (PAPI_reset (PAPI_EventSet));
    el = MPID_nem_prefetched_cell;
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    if (!el)
    {
	if (MPID_nem_queue_empty (MPID_nem_mem_region.my_freeQ))
	    goto return_again;
	
	MPID_nem_queue_dequeue (MPID_nem_mem_region.my_freeQ, &el);
    }
    DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues14));
#else /* PREFETCH_CELL */
    DO_PAPI (PAPI_reset (PAPI_EventSet));
    if (MPID_nem_queue_empty (MPID_nem_mem_region.my_freeQ))
    {
	goto return_again;
    }
    DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues14));

    DO_PAPI (PAPI_reset (PAPI_EventSet));
    MPID_nem_queue_dequeue (MPID_nem_mem_region.my_freeQ , &el);
    DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues10));
#endif /* PREFETCH_CELL */

    DO_PAPI (PAPI_reset (PAPI_EventSet));
    el->pkt.mpich2.source  = my_rank;
    el->pkt.mpich2.dest    = vc->lpid;
    el->pkt.mpich2.datalen = size;
    el->pkt.mpich2.seqno   = vc_ch->send_seqno++;
    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, el->pkt.mpich2.type = MPID_NEM_PKT_MPICH2_HEAD);
    
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    MPIU_Memcpy((void *)el->pkt.mpich2.payload, buf, size);
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    DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues11));

    MPIU_DBG_MSG (CH3_CHANNEL, VERBOSE, "--> Sent queue");
    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, MPID_nem_dbg_dump_cell (el));

    DO_PAPI (PAPI_reset (PAPI_EventSet));
    if (vc_ch->is_local)
    {
	MPID_nem_queue_enqueue (vc_ch->recv_queue, el);
	/*MPID_nem_rel_dump_queue( vc_ch->recv_queue ); */
    }
    else
    {
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        mpi_errno = MPID_nem_netmod_func->send (vc, el, size);
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        if (mpi_errno) MPIU_ERR_POP (mpi_errno);
    }
    DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues12));
    DO_PAPI (PAPI_reset (PAPI_EventSet));    

#ifdef PREFETCH_CELL
    DO_PAPI (PAPI_reset (PAPI_EventSet));
    if (!MPID_nem_queue_empty (MPID_nem_mem_region.my_freeQ))
	MPID_nem_queue_dequeue (MPID_nem_mem_region.my_freeQ, &MPID_nem_prefetched_cell);
    else
	MPID_nem_prefetched_cell = 0;
    DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues10));
#endif /*PREFETCH_CELL */

    /*DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues14)); */

 return_success:
    *again = 0;
    goto fn_exit;
 return_again:
    *again = 1;
    goto fn_exit;
 fn_exit:
    return mpi_errno;
 fn_fail:
    goto fn_exit;
}


/*
  int MPID_nem_mpich2_sendv (struct iovec **iov, int *n_iov, MPIDI_VC_t *vc);

  sends iov to vc
  Non-blocking
  if iov specifies more than MPID_NEM_MPICH2_DATA_LEN of data, the iov will be truncated, so that after MPID_nem_mpich2_sendv returns,
  iov will describe unsent data
  sets again to 1 if it can't get a free cell, 0 otherwise
*/
#undef FUNCNAME
#define FUNCNAME MPID_nem_mpich2_sendv
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
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static inline int
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MPID_nem_mpich2_sendv (MPID_IOV **iov, int *n_iov, MPIDI_VC_t *vc, int *again)
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{
    int mpi_errno = MPI_SUCCESS;
    MPID_nem_cell_ptr_t el;
    char *cell_buf;
    MPIDI_msg_sz_t payload_len;    
    int my_rank;
    MPIDI_CH3I_VC *vc_ch = (MPIDI_CH3I_VC *)vc->channel_private;
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    MPIDI_STATE_DECL(MPID_STATE_MPID_NEM_MPICH2_SENDV);

    MPIDI_FUNC_ENTER(MPID_STATE_MPID_NEM_MPICH2_SENDV);
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    MPIU_Assert (*n_iov > 0 && (*iov)->MPID_IOV_LEN > 0);
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    DO_PAPI (PAPI_reset (PAPI_EventSet));

    my_rank = MPID_nem_mem_region.rank;
	
#ifdef PREFETCH_CELL
    el = MPID_nem_prefetched_cell;
    
    if (!el)
    {
	if (MPID_nem_queue_empty (MPID_nem_mem_region.my_freeQ))
	{
	    DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues5));
            goto return_again;
	}
	
	MPID_nem_queue_dequeue (MPID_nem_mem_region.my_freeQ, &el);
    }
#else /*PREFETCH_CELL     */
    if (MPID_nem_queue_empty (MPID_nem_mem_region.my_freeQ))
    {
	DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues5));
        goto return_again;
    }

    MPID_nem_queue_dequeue (MPID_nem_mem_region.my_freeQ , &el);
#endif /*PREFETCH_CELL     */

    payload_len = MPID_NEM_MPICH2_DATA_LEN;
    cell_buf    = (char *) el->pkt.mpich2.payload; /* cast away volatile */
    
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    while (*n_iov && payload_len >= (*iov)->MPID_IOV_LEN)
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    {
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	int _iov_len = (*iov)->MPID_IOV_LEN;
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	MPIU_Memcpy (cell_buf, (*iov)->MPID_IOV_BUF, _iov_len);
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	payload_len -= _iov_len;
	cell_buf += _iov_len;
	--(*n_iov);
	++(*iov);
    }
    
    if (*n_iov && payload_len > 0)
    {
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	MPIU_Memcpy (cell_buf, (*iov)->MPID_IOV_BUF, payload_len);
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	(*iov)->MPID_IOV_BUF = (char *)(*iov)->MPID_IOV_BUF + payload_len;
	(*iov)->MPID_IOV_LEN -= payload_len;
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 	payload_len = 0;
    }

    el->pkt.mpich2.source  = my_rank;
    el->pkt.mpich2.dest    = vc->lpid;
    el->pkt.mpich2.datalen = MPID_NEM_MPICH2_DATA_LEN - payload_len;
    el->pkt.mpich2.seqno   = vc_ch->send_seqno++;
    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, el->pkt.mpich2.type = MPID_NEM_PKT_MPICH2);

    MPIU_DBG_MSG (CH3_CHANNEL, VERBOSE, "--> Sent queue");
    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, MPID_nem_dbg_dump_cell (el));

    if(vc_ch->is_local)
    {
	MPID_nem_queue_enqueue (vc_ch->recv_queue, el);
	/*MPID_nem_rel_dump_queue( vc_ch->recv_queue ); */
    }
    else
    {
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        mpi_errno = MPID_nem_netmod_func->send (vc, el, MPID_NEM_MPICH2_DATA_LEN - payload_len);
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        if (mpi_errno) MPIU_ERR_POP (mpi_errno);
    }

#ifdef PREFETCH_CELL
    if (!MPID_nem_queue_empty (MPID_nem_mem_region.my_freeQ))
	MPID_nem_queue_dequeue (MPID_nem_mem_region.my_freeQ, &MPID_nem_prefetched_cell);
    else
	MPID_nem_prefetched_cell = 0;
#endif /*PREFETCH_CELL */
    DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues5));

    *again = 0;
    goto fn_exit;
 return_again:
    *again = 1;
    goto fn_exit;
 fn_exit:
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    MPIDI_FUNC_EXIT(MPID_STATE_MPID_NEM_MPICH2_SENDV);
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    return mpi_errno;
 fn_fail:
    goto fn_exit;
}

/* MPID_nem_mpich2_sendv_header (struct iovec **iov, int *n_iov, int dest)
   same as above but first iov element is an MPICH2 32 byte header */
#undef FUNCNAME
#define FUNCNAME MPID_nem_mpich2_sendv_header
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
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static inline int
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MPID_nem_mpich2_sendv_header (MPID_IOV **iov, int *n_iov, MPIDI_VC_t *vc, int *again)
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{
    int mpi_errno = MPI_SUCCESS;
    MPID_nem_cell_ptr_t el;
    char *cell_buf;
    MPIDI_msg_sz_t payload_len;    
    int my_rank;
    MPIDI_CH3I_VC *vc_ch = (MPIDI_CH3I_VC *)vc->channel_private;
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    MPIDI_STATE_DECL(MPID_STATE_MPID_NEM_MPICH2_SENDV_HEADER);
    
    MPIDI_FUNC_ENTER(MPID_STATE_MPID_NEM_MPICH2_SENDV_HEADER);
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    DO_PAPI (PAPI_reset (PAPI_EventSet));
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    MPIU_Assert (*n_iov > 0 && (*iov)->MPID_IOV_LEN == sizeof(MPIDI_CH3_Pkt_t));
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    my_rank = MPID_nem_mem_region.rank;

#ifdef USE_FASTBOX
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    if (vc_ch->is_local && (*n_iov == 2 && (*iov)[1].MPID_IOV_LEN + sizeof(MPIDI_CH3_Pkt_t) <= MPID_NEM_FBOX_DATALEN))
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    {
	MPID_nem_fbox_mpich2_t *pbox = vc_ch->fbox_out;
	int count = 10;
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	uint32_t *payload_32 = (uint32_t *)(pbox->cell.pkt.mpich2.payload ) ;
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	uint32_t *buf_32 = (uint32_t *)(*iov)->MPID_IOV_BUF;
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	if (MPID_nem_islocked ((MPID_nem_fbox_common_ptr_t)pbox, 0, count))
	    goto usequeue_l;
	{
	    pbox->cell.pkt.mpich2.source  = MPID_nem_mem_region.local_rank;
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	    pbox->cell.pkt.mpich2.datalen = (*iov)[1].MPID_IOV_LEN + sizeof(MPIDI_CH3_Pkt_t);
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	    pbox->cell.pkt.mpich2.seqno   = vc_ch->send_seqno++;
            MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, pbox->cell.pkt.mpich2.type = MPID_NEM_PKT_MPICH2_HEAD);
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	    payload_32[0] = buf_32[0];
	    payload_32[1] = buf_32[1];
	    payload_32[2] = buf_32[2];
	    payload_32[3] = buf_32[3];
	    payload_32[4] = buf_32[4];
	    payload_32[5] = buf_32[5];
	    payload_32[6] = buf_32[6];
	    payload_32[7] = buf_32[7];
	    if (sizeof(MPIDI_CH3_Pkt_t) == 40) /* This conditional should be optimized out */
	    {
		payload_32[8] = buf_32[8];
		payload_32[9] = buf_32[9];
	    }
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	    MPIU_Memcpy ((char *)pbox->cell.pkt.mpich2.payload +sizeof(MPIDI_CH3_Pkt_t), (*iov)[1].MPID_IOV_BUF, (*iov)[1].MPID_IOV_LEN);
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	    OPA_write_barrier();
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	    pbox->flag.value = 1;
	    *n_iov = 0;

	    MPIU_DBG_MSG (CH3_CHANNEL, VERBOSE, "--> Sent fbox ");
	    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, MPID_nem_dbg_dump_cell (&pbox->cell));

            goto return_success;
	}
    }
 usequeue_l:
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#endif /*USE_FASTBOX */
	
#ifdef PREFETCH_CELL
    el = MPID_nem_prefetched_cell;
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    if (!el)
    {
	if (MPID_nem_queue_empty (MPID_nem_mem_region.my_freeQ))
	{
	    DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues5));
            goto return_again;
	}
	
	MPID_nem_queue_dequeue (MPID_nem_mem_region.my_freeQ, &el);
    }
#else /*PREFETCH_CELL    */
    if (MPID_nem_queue_empty (MPID_nem_mem_region.my_freeQ))
    {
	DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues5));
        goto return_again;
    }

    MPID_nem_queue_dequeue (MPID_nem_mem_region.my_freeQ, &el);
#endif /*PREFETCH_CELL */

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    MPIU_Memcpy((void *)el->pkt.mpich2.payload, (*iov)->MPID_IOV_BUF, sizeof(MPIDI_CH3_Pkt_t));
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    cell_buf = (char *)(el->pkt.mpich2.payload) + sizeof(MPIDI_CH3_Pkt_t);
    ++(*iov);
    --(*n_iov);

    payload_len = MPID_NEM_MPICH2_DATA_LEN - sizeof(MPIDI_CH3_Pkt_t);
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    while (*n_iov && payload_len >= (*iov)->MPID_IOV_LEN)
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    {
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	int _iov_len = (*iov)->MPID_IOV_LEN;
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	MPIU_Memcpy (cell_buf, (*iov)->MPID_IOV_BUF, _iov_len);
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	payload_len -= _iov_len;
	cell_buf += _iov_len;
	--(*n_iov);
	++(*iov);
    }
    
    if (*n_iov && payload_len > 0)
    {
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	MPIU_Memcpy (cell_buf, (*iov)->MPID_IOV_BUF, payload_len);
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	(*iov)->MPID_IOV_BUF = (char *)(*iov)->MPID_IOV_BUF + payload_len;
	(*iov)->MPID_IOV_LEN -= payload_len;
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	payload_len = 0;
    }

    el->pkt.mpich2.source  = my_rank;
    el->pkt.mpich2.dest    = vc->lpid;
    el->pkt.mpich2.datalen = MPID_NEM_MPICH2_DATA_LEN - payload_len;
    el->pkt.mpich2.seqno   = vc_ch->send_seqno++;
    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, el->pkt.mpich2.type = MPID_NEM_PKT_MPICH2_HEAD);

    MPIU_DBG_MSG (CH3_CHANNEL, VERBOSE, "--> Sent queue");
    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, MPID_nem_dbg_dump_cell (el));

    if (vc_ch->is_local)
    {    
	MPID_nem_queue_enqueue (vc_ch->recv_queue, el);	
	/*MPID_nem_rel_dump_queue( vc_ch->recv_queue ); */
    }
    else
    {
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        mpi_errno = MPID_nem_netmod_func->send (vc, el, MPID_NEM_MPICH2_DATA_LEN - payload_len);
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        if (mpi_errno) MPIU_ERR_POP (mpi_errno);
    }

#ifdef PREFETCH_CELL
    if (!MPID_nem_queue_empty (MPID_nem_mem_region.my_freeQ))
	MPID_nem_queue_dequeue (MPID_nem_mem_region.my_freeQ, &MPID_nem_prefetched_cell);
    else
	MPID_nem_prefetched_cell = 0;
#endif /*PREFETCH_CELL */
    DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues5));

 return_success:
    *again = 0;
    goto fn_exit;
 return_again:
    *again = 1;
    goto fn_exit;
 fn_exit:
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    MPIDI_FUNC_EXIT(MPID_STATE_MPID_NEM_MPICH2_SENDV_HEADER);
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    return mpi_errno;
 fn_fail:
    goto fn_exit;
}

/* send the header and data described by the segment in one cell.  If
   there is no cell available, *again is set to 1.  If all of the data
   cannot be sent, *segment_first is set to the index of the first
   unsent byte.
   Pre condition:  This must be the first packet of a message (i.e.,
                       *segment first == 0)
                   The destination process is local
   Post conditions:  the header has been sent iff *again == 0
                     if there is data to send (segment_size > 0) then
                         (the header has been sent iff any data has
                         been sent (i.e., *segment_first > 0) )
                     i.e.: we will never send only the header
*/
#undef FUNCNAME
#define FUNCNAME MPID_nem_mpich2_send_seg_header
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
466
static inline void
467
468
469
470
MPID_nem_mpich2_send_seg_header (MPID_Segment *segment, MPIDI_msg_sz_t *segment_first, MPIDI_msg_sz_t segment_size,
                                 void *header, MPIDI_msg_sz_t header_sz, MPIDI_VC_t *vc, int *again)
{
    MPID_nem_cell_ptr_t el;
471
    MPIDI_msg_sz_t datalen;
472
473
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475
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477
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480
481
482
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499
    int my_rank;
    MPIDI_msg_sz_t last;
    MPIDI_CH3I_VC *vc_ch = (MPIDI_CH3I_VC *)vc->channel_private;

    MPIU_Assert(vc_ch->is_local); /* netmods will have their own implementation */
    MPIU_Assert(header_sz <= sizeof(MPIDI_CH3_Pkt_t));
    MPIU_Assert(*segment_first == 0); /* this routine is only called for new messages */
    
    
    DO_PAPI (PAPI_reset (PAPI_EventSet));

    my_rank = MPID_nem_mem_region.rank;

#ifdef USE_FASTBOX
    if (sizeof(MPIDI_CH3_Pkt_t) + segment_size <= MPID_NEM_FBOX_DATALEN)
    {
	MPID_nem_fbox_mpich2_t *pbox = vc_ch->fbox_out;
	int count = 10;

	if (MPID_nem_islocked ((MPID_nem_fbox_common_ptr_t)pbox, 0, count))
	    goto usequeue_l;
	{
	    pbox->cell.pkt.mpich2.source  = MPID_nem_mem_region.local_rank;
	    pbox->cell.pkt.mpich2.datalen = sizeof(MPIDI_CH3_Pkt_t) + segment_size;
	    pbox->cell.pkt.mpich2.seqno   = vc_ch->send_seqno++;
            MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, pbox->cell.pkt.mpich2.type = MPID_NEM_PKT_MPICH2_HEAD);

            /* copy header */
500
            MPIU_Memcpy((void *)pbox->cell.pkt.mpich2.payload, header, header_sz);
501
            
502
503
504
505
            /* copy data */
            last = segment_size;
            MPID_Segment_pack(segment, *segment_first, &last, (char *)pbox->cell.pkt.mpich2.payload + sizeof(MPIDI_CH3_Pkt_t));
            MPIU_Assert(last == segment_size);
506
507

	    OPA_write_barrier();
508
509
510
511
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514
515
516
517
518
	    pbox->flag.value = 1;

            *segment_first = last;

	    MPIU_DBG_MSG(CH3_CHANNEL, VERBOSE, "--> Sent fbox ");
	    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, MPID_nem_dbg_dump_cell (&pbox->cell));

            goto return_success;
	}
    }
 usequeue_l:
519

520
521
522
523
#endif /*USE_FASTBOX */
	
#ifdef PREFETCH_CELL
    el = MPID_nem_prefetched_cell;
524

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    if (!el)
    {
	if (MPID_nem_queue_empty (MPID_nem_mem_region.my_freeQ))
	{
	    DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues5));
            goto return_again;
	}
	
	MPID_nem_queue_dequeue (MPID_nem_mem_region.my_freeQ, &el);
    }
#else /*PREFETCH_CELL    */
    if (MPID_nem_queue_empty (MPID_nem_mem_region.my_freeQ))
    {
	DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues5));
        goto return_again;
    }

    MPID_nem_queue_dequeue (MPID_nem_mem_region.my_freeQ, &el);
#endif /*PREFETCH_CELL */

    /* copy header */
546
    MPIU_Memcpy((void *)el->pkt.mpich2.payload, header, header_sz);
547
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591
592
    
    /* copy data */
    if (segment_size - *segment_first <= MPID_NEM_MPICH2_DATA_LEN - sizeof(MPIDI_CH3_Pkt_t))
        last = segment_size;
    else
        last = *segment_first + MPID_NEM_MPICH2_DATA_LEN - sizeof(MPIDI_CH3_Pkt_t);
    
    MPID_Segment_pack(segment, *segment_first, &last, (char *)el->pkt.mpich2.payload + sizeof(MPIDI_CH3_Pkt_t));
    datalen = sizeof(MPIDI_CH3_Pkt_t) + last - *segment_first;
    *segment_first = last;
    
    el->pkt.mpich2.source  = my_rank;
    el->pkt.mpich2.dest    = vc->lpid;
    el->pkt.mpich2.datalen = datalen;
    el->pkt.mpich2.seqno   = vc_ch->send_seqno++;
    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, el->pkt.mpich2.type = MPID_NEM_PKT_MPICH2_HEAD);

    MPIU_DBG_MSG (CH3_CHANNEL, VERBOSE, "--> Sent queue");
    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, MPID_nem_dbg_dump_cell (el));

    MPID_nem_queue_enqueue (vc_ch->recv_queue, el);	

#ifdef PREFETCH_CELL
    if (!MPID_nem_queue_empty (MPID_nem_mem_region.my_freeQ))
	MPID_nem_queue_dequeue (MPID_nem_mem_region.my_freeQ, &MPID_nem_prefetched_cell);
    else
	MPID_nem_prefetched_cell = 0;
#endif /*PREFETCH_CELL */
    DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues5));

 return_success:
    *again = 0;
    goto fn_exit;
 return_again:
    *again = 1;
    goto fn_exit;
 fn_exit:
    return;
}

/* similar to MPID_nem_mpich2_send_seg_header, except there is no
   header to send.  This need not be the first packet of a message. */
#undef FUNCNAME
#define FUNCNAME MPID_nem_mpich2_send_seg
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
593
static inline void
594
595
596
597
598
599
600
601
MPID_nem_mpich2_send_seg (MPID_Segment *segment, MPIDI_msg_sz_t *segment_first, MPIDI_msg_sz_t segment_size, MPIDI_VC_t *vc, int *again)
{
    MPID_nem_cell_ptr_t el;
    MPIDI_msg_sz_t datalen;    
    int my_rank;
    MPIDI_msg_sz_t last;
    MPIDI_CH3I_VC *vc_ch = (MPIDI_CH3I_VC *)vc->channel_private;

602
    MPIU_Assert(vc_ch->is_local); /* netmods will have their own implementation */    
603
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673
674
675
676
677
678
679
    
    DO_PAPI (PAPI_reset (PAPI_EventSet));

    my_rank = MPID_nem_mem_region.rank;
	
#ifdef PREFETCH_CELL
    el = MPID_nem_prefetched_cell;
    
    if (!el)
    {
	if (MPID_nem_queue_empty (MPID_nem_mem_region.my_freeQ))
	{
	    DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues5));
            goto return_again;
	}
	
	MPID_nem_queue_dequeue (MPID_nem_mem_region.my_freeQ, &el);
    }
#else /*PREFETCH_CELL    */
    if (MPID_nem_queue_empty (MPID_nem_mem_region.my_freeQ))
    {
	DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues5));
        goto return_again;
    }

    MPID_nem_queue_dequeue (MPID_nem_mem_region.my_freeQ, &el);
#endif /*PREFETCH_CELL */

    /* copy data */
    if (segment_size - *segment_first <= MPID_NEM_MPICH2_DATA_LEN)
        last = segment_size;
    else
        last = *segment_first + MPID_NEM_MPICH2_DATA_LEN;
    
    MPID_Segment_pack(segment, *segment_first, &last, (char *)el->pkt.mpich2.payload);
    datalen = last - *segment_first;
    *segment_first = last;
    
    el->pkt.mpich2.source  = my_rank;
    el->pkt.mpich2.dest    = vc->lpid;
    el->pkt.mpich2.datalen = datalen;
    el->pkt.mpich2.seqno   = vc_ch->send_seqno++;
    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, el->pkt.mpich2.type = MPID_NEM_PKT_MPICH2_HEAD);

    MPIU_DBG_MSG (CH3_CHANNEL, VERBOSE, "--> Sent queue");
    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, MPID_nem_dbg_dump_cell (el));

    MPID_nem_queue_enqueue (vc_ch->recv_queue, el);	

#ifdef PREFETCH_CELL
    if (!MPID_nem_queue_empty (MPID_nem_mem_region.my_freeQ))
	MPID_nem_queue_dequeue (MPID_nem_mem_region.my_freeQ, &MPID_nem_prefetched_cell);
    else
	MPID_nem_prefetched_cell = 0;
#endif /*PREFETCH_CELL */
    DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues5));

    *again = 0;
    goto fn_exit;
 return_again:
    *again = 1;
    goto fn_exit;
 fn_exit:
    return;
}

/*
  MPID_nem_mpich2_dequeue_fastbox (int local_rank)
  decrements usage count on fastbox for process with local rank local_rank and
  dequeues it from fbox queue if usage is 0.
  This function is called whenever a receive for a process on this node is matched.
  Fastboxes on fbox queue are polled regularly for incoming messages.
*/
#undef FUNCNAME
#define FUNCNAME MPID_nem_mpich2_dequeue_fastbox
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
680
static inline void MPID_nem_mpich2_dequeue_fastbox(int local_rank)
681
682
683
{
    MPID_nem_fboxq_elem_t *el;

684
685
    MPIU_Assert(local_rank < MPID_nem_mem_region.num_local);

686
    el = &MPID_nem_fboxq_elem_list[local_rank];    
687
    MPIU_Assert(el->fbox != NULL);
688

689
    MPIU_Assert(el->usage);
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710

    --el->usage;
    if (el->usage == 0)
    {
	if (el->prev == NULL)
	    MPID_nem_fboxq_head = el->next;
	else
	    el->prev->next = el->next;

	if (el->next == NULL)
	    MPID_nem_fboxq_tail = el->prev;
	else
	    el->next->prev = el->prev;

	if (el == MPID_nem_curr_fboxq_elem)
	{
	    if (el->next == NULL)
		MPID_nem_curr_fboxq_elem = MPID_nem_fboxq_head;
	    else
		MPID_nem_curr_fboxq_elem = el->next;
	}
711
    }    
712
713
714
715
716
717
718
719
720
721
722
723
}

/*
  MPID_nem_mpich2_enqueue_fastbox (int local_rank)
  enqueues fastbox for process with local rank local_rank on fbox queue
  This function is called whenever a receive is posted for a process on this node.
  Fastboxes on fbox queue are polled regularly for incoming messages.
*/
#undef FUNCNAME
#define FUNCNAME MPID_nem_mpich2_dequeue_fastbox
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
724
static inline void MPID_nem_mpich2_enqueue_fastbox(int local_rank)
725
726
727
{
    MPID_nem_fboxq_elem_t *el;

728
729
    MPIU_Assert(local_rank < MPID_nem_mem_region.num_local);

730
    el = &MPID_nem_fboxq_elem_list[local_rank];
731
732
    MPIU_Assert(el->fbox != NULL);

733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
    if (el->usage)
    {
	++el->usage;
    }
    else
    {
	el->usage = 1;
	if (MPID_nem_fboxq_tail == NULL)
	{
	    el->prev = NULL;
	    MPID_nem_curr_fboxq_elem = MPID_nem_fboxq_head = el;
	}
	else
	{
	    el->prev = MPID_nem_fboxq_tail;
	    MPID_nem_fboxq_tail->next = el;
	}
	    
	el->next = NULL;
	MPID_nem_fboxq_tail = el;
753
    }
754
755
756
757
758
759
760
761
762
763
764
}
/*
  MPID_nem_recv_seqno_matches (MPID_nem_queue_ptr_t qhead)
  check whether the sequence number for the cell at the head of qhead is the one
  expected from the sender of that cell
  We only check these for processes in COMM_WORLD (i.e. the ones initially allocated)
*/
#undef FUNCNAME
#define FUNCNAME MPID_nem_recv_seqno_matches
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
765
static inline int
766
767
MPID_nem_recv_seqno_matches (MPID_nem_queue_ptr_t qhead)
{
768
769
770
    int source;
    MPID_nem_cell_ptr_t cell = MPID_nem_queue_head(qhead);
    source = cell->pkt.mpich2.source;
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
    
    return (cell->pkt.mpich2.seqno == MPID_nem_recv_seqno[source]);
}

/*
  int MPID_nem_mpich2_test_recv (MPID_nem_cell_ptr_t *cell, int *in_fbox);

  non-blocking receive
  sets cell to the received cell, or NULL if there is nothing to receive. in_fbox is true iff the cell was found in a fbox
  the cell must be released back to the subsystem with MPID_nem_mpich2_release_cell() once the packet has been copied out
*/
#undef FUNCNAME
#define FUNCNAME MPID_nem_mpich2_test_recv
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
786
static inline int
787
MPID_nem_mpich2_test_recv(MPID_nem_cell_ptr_t *cell, int *in_fbox, int in_blocking_progress)
788
789
790
791
792
793
{
    int mpi_errno = MPI_SUCCESS;
    
    DO_PAPI (PAPI_reset (PAPI_EventSet));

#ifdef USE_FASTBOX
794
    if (poll_fboxes(cell)) goto fbox_l;
795
796
#endif/* USE_FASTBOX     */

797
    if (MPID_nem_num_netmods)
798
    {
799
	mpi_errno = MPID_nem_network_poll(in_blocking_progress);
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
        if (mpi_errno) MPIU_ERR_POP (mpi_errno);
    }

    if (MPID_nem_queue_empty (MPID_nem_mem_region.my_recvQ) || !MPID_nem_recv_seqno_matches (MPID_nem_mem_region.my_recvQ))
    {
#ifdef USE_FASTBOX
	poll_all_fboxes (cell, goto fbox_l);
#endif/* USE_FASTBOX     */
	*cell = NULL;
	goto fn_exit;
    }
    
    MPID_nem_queue_dequeue (MPID_nem_mem_region.my_recvQ, cell);

    ++MPID_nem_recv_seqno[(*cell)->pkt.mpich2.source];
    *in_fbox = 0;

 fn_exit:
    DO_PAPI (PAPI_accum_var (PAPI_EventSet, PAPI_vvalues6));
    
    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, {
	if (*cell)
	{
	    MPIU_DBG_MSG_S (CH3_CHANNEL, VERBOSE, "<-- Recv %s", (*in_fbox) ? "fbox " : "queue");
	    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, MPID_nem_dbg_dump_cell (*cell));
	}
    });

 fn_fail:
    return mpi_errno;

 fbox_l:
    *in_fbox = 1;
    goto fn_exit;

}

/*
  int MPID_nem_mpich2_test_recv_wait (MPID_nem_cell_ptr_t *cell, int *in_fbox, int timeout);

  blocking receive with timeout
  waits up to timeout iterations to receive a cell
  sets cell to the received cell, or NULL if there is nothing to receive. in_fbox is true iff the cell was found in a fbox
  the cell must be released back to the subsystem with MPID_nem_mpich2_release_cell() once the packet has been copied out
*/
#undef FUNCNAME
#define FUNCNAME MPID_nem_mpich2_test_recv_wait
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
849
static inline int
850
851
852
853
854
MPID_nem_mpich2_test_recv_wait (MPID_nem_cell_ptr_t *cell, int *in_fbox, int timeout)
{
    int mpi_errno = MPI_SUCCESS;
    
#ifdef USE_FASTBOX
855
    if (poll_fboxes(cell)) goto fbox_l;
856
857
#endif/* USE_FASTBOX     */

858
    if (MPID_nem_num_netmods)
859
    {
860
	mpi_errno = MPID_nem_network_poll(TRUE /* blocking */);
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
        if (mpi_errno) MPIU_ERR_POP (mpi_errno);
    }

    while ((--timeout > 0) && (MPID_nem_queue_empty (MPID_nem_mem_region.my_recvQ) || !MPID_nem_recv_seqno_matches (MPID_nem_mem_region.my_recvQ)))
    {
#ifdef USE_FASTBOX
	poll_all_fboxes (cell, goto fbox_l);
#endif/* USE_FASTBOX     */
	*cell = NULL;
	goto exit_l;
    }
    
    MPID_nem_queue_dequeue (MPID_nem_mem_region.my_recvQ, cell);

    ++MPID_nem_recv_seqno[(*cell)->pkt.mpich2.source];
    *in_fbox = 0;
 exit_l:
    
    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, {
            if (*cell)
            {
                MPIU_DBG_MSG_S (CH3_CHANNEL, VERBOSE, "<-- Recv %s", (*in_fbox) ? "fbox " : "queue");
                MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, MPID_nem_dbg_dump_cell (*cell));
            }
        });

 fn_fail:
    return mpi_errno;

 fbox_l:
    *in_fbox = 1;
    goto exit_l;
}

/*
  int MPID_nem_mpich2_blocking_recv (MPID_nem_cell_ptr_t *cell, int *in_fbox);

  blocking receive waits until there is something to receive, or then
  sets cell to the received cell. in_fbox is true iff the cell was
  found in a fbox the cell must be released back to the subsystem with
  MPID_nem_mpich2_release_cell() once the packet has been copied out
*/
#undef FUNCNAME
#define FUNCNAME MPID_nem_mpich2_blocking_recv
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
907
static inline int
908
909
910
911
MPID_nem_mpich2_blocking_recv(MPID_nem_cell_ptr_t *cell, int *in_fbox)
{
    int mpi_errno = MPI_SUCCESS;
    unsigned completions = MPIDI_CH3I_progress_completion_count;
912
#ifndef ENABLE_NO_YIELD
913
914
915
916
917
918
919
920
921
922
923
924
925
926
    int pollcount = 0;
#endif
    DO_PAPI (PAPI_reset (PAPI_EventSet));

#ifdef MPICH_IS_THREADED
    /* We should never enter this function in a multithreaded app */
#ifdef HAVE_RUNTIME_THREADCHECK
    MPIU_Assert(!MPIR_ThreadInfo.isThreaded);
#else
    MPIU_Assert(0);
#endif
#endif

#ifdef USE_FASTBOX
927
    if (poll_fboxes(cell)) goto fbox_l;
928
929
#endif /*USE_FASTBOX */

930
    if (MPID_nem_num_netmods)
931
    {
932
	mpi_errno = MPID_nem_network_poll(TRUE /* blocking */);
933
934
935
936
937
938
939
940
941
        if (mpi_errno) MPIU_ERR_POP (mpi_errno);
    }

    while (MPID_nem_queue_empty (MPID_nem_mem_region.my_recvQ) || !MPID_nem_recv_seqno_matches (MPID_nem_mem_region.my_recvQ))
    {
	DO_PAPI (PAPI_reset (PAPI_EventSet));

#ifdef USE_FASTBOX	
	poll_all_fboxes (cell, goto fbox_l);
942
        if (poll_fboxes(cell)) goto fbox_l;
943
944
#endif /*USE_FASTBOX */

945
	if (MPID_nem_num_netmods)
946
	{            
947
	    mpi_errno = MPID_nem_network_poll(TRUE /* blocking */);
948
949
            if (mpi_errno) MPIU_ERR_POP (mpi_errno);

950
            if (completions != MPIDI_CH3I_progress_completion_count || MPID_nem_local_lmt_pending || MPIDI_CH3I_active_send[CH3_NORMAL_QUEUE]
951
                || MPIDI_CH3I_SendQ_head(CH3_NORMAL_QUEUE))
952
            {
953
                *cell = NULL;
954
955
956
957
                *in_fbox = 0;
                goto exit_l;
            }
	}
958
#if !defined ENABLE_NO_YIELD
959
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961
	if (pollcount >= MPID_NEM_POLLS_BEFORE_YIELD)
	{
	    pollcount = 0;
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	    MPIDU_Yield();
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	}
	++pollcount;
#endif
    }

    MPID_nem_queue_dequeue (MPID_nem_mem_region.my_recvQ, cell);

    ++MPID_nem_recv_seqno[(*cell)->pkt.mpich2.source];
    *in_fbox = 0;

 exit_l:    

    DO_PAPI (PAPI_accum_var (PAPI_EventSet,PAPI_vvalues8));
    
    MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, {
            if (*cell)
            {
                MPIU_DBG_MSG_S (CH3_CHANNEL, VERBOSE, "<-- Recv %s", (*in_fbox) ? "fbox " : "queue");
                MPIU_DBG_STMT (CH3_CHANNEL, VERBOSE, MPID_nem_dbg_dump_cell(*cell));
            }
        });

 fn_fail:
    return mpi_errno;

 fbox_l:
    *in_fbox = 1;
    goto exit_l;
}

/*
  int MPID_nem_mpich2_release_cell (MPID_nem_cell_ptr_t cell, MPIDI_VC_t *vc);

  releases the cell back to the subsystem to be used for subsequent receives
*/
#undef FUNCNAME
#define FUNCNAME MPID_nem_mpich2_release_cell
#undef FCNAME
#define FCNAME MPIDI_QUOTE(FUNCNAME)
1002
static inline int
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MPID_nem_mpich2_release_cell (MPID_nem_cell_ptr_t cell, MPIDI_VC_t *vc)
{
    int mpi_errno = MPI_SUCCESS;
    MPIDI_CH3I_VC *vc_ch = (MPIDI_CH3I_VC *)vc->channel_private;
    DO_PAPI (PAPI_reset (PAPI_EventSet));
    MPID_nem_queue_enqueue (vc_ch->free_queue, cell);
    DO_PAPI (PAPI_accum_var (PAPI_EventSet,PAPI_vvalues9));
    return mpi_errno;
}

#endif /*_MPID_NEM_INLINE_H*/