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openmpi/ompi/mca/pml/ob1/pml_ob1_progress.c
George Bosilca 17e65369be Fix the deadlock when we run out of resources on the BTLs. Move the progress
function from the BML into the PML. The BTL progress functions are now directly
registered with the event library.

This commit was SVN r19561.
2008-09-15 22:56:23 +00:00

78 строки
2.6 KiB
C

/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2008 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "pml_ob1.h"
#include "pml_ob1_sendreq.h"
#include "ompi/mca/bml/base/base.h"
int mca_pml_ob1_progress(void)
{
int i, queue_length = opal_list_get_size(&mca_pml_ob1.send_pending);
int j, completed_requests = 0;
bool send_succedded;
if( OPAL_LIKELY(0 == queue_length) )
return 0;
for( i = 0; i < queue_length; i++ ) {
mca_pml_ob1_send_pending_t pending_type = MCA_PML_OB1_SEND_PENDING_NONE;
mca_pml_ob1_send_request_t* sendreq;
mca_bml_base_endpoint_t* endpoint;
sendreq = get_request_from_send_pending(&pending_type);
if(OPAL_UNLIKELY(NULL == sendreq))
break;
switch(pending_type) {
case MCA_PML_OB1_SEND_PENDING_NONE:
assert(0);
return 0;
case MCA_PML_OB1_SEND_PENDING_SCHEDULE:
if( mca_pml_ob1_send_request_schedule_exclusive(sendreq) ==
OMPI_ERR_OUT_OF_RESOURCE ) {
return 0;
}
completed_requests++;
break;
case MCA_PML_OB1_SEND_PENDING_START:
endpoint = sendreq->req_endpoint;
send_succedded = false;
for(j = 0; j < (int)mca_bml_base_btl_array_get_size(&endpoint->btl_eager); j++) {
mca_bml_base_btl_t* bml_btl;
int rc;
/* select a btl */
bml_btl = mca_bml_base_btl_array_get_next(&endpoint->btl_eager);
rc = mca_pml_ob1_send_request_start_btl(sendreq, bml_btl);
if( OPAL_LIKELY(OMPI_SUCCESS == rc) ) {
send_succedded = true;
completed_requests++;
break;
}
}
if( false == send_succedded ) {
add_request_to_send_pending(sendreq, MCA_PML_OB1_SEND_PENDING_START, true);
}
}
}
return completed_requests;
}