/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2005 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 "ompi/include/constants.h"
#include "mca/pml/pml.h"
#include "mca/ptl/ptl.h"
#include "pml_uniq.h"
#include "pml_uniq_proc.h"
#include "pml_uniq_sendreq.h"
#include "pml_uniq_recvreq.h"
static int mca_pml_uniq_send_request_fini(struct ompi_request_t** request)
{
MCA_PML_UNIQ_FINI(request);
return OMPI_SUCCESS;
}
static int mca_pml_uniq_send_request_free(struct ompi_request_t** request)
{
MCA_PML_UNIQ_FREE(request);
return OMPI_SUCCESS;
}
static int mca_pml_uniq_send_request_cancel(struct ompi_request_t* request, int complete)
{
/* we dont cancel send requests by now */
return OMPI_SUCCESS;
}
static void mca_pml_uniq_send_request_construct(mca_pml_base_send_request_t* req)
{
req->req_base.req_type = MCA_PML_REQUEST_SEND;
req->req_base.req_ompi.req_fini = mca_pml_uniq_send_request_fini;
req->req_base.req_ompi.req_free = mca_pml_uniq_send_request_free;
req->req_base.req_ompi.req_cancel = mca_pml_uniq_send_request_cancel;
}
static void mca_pml_uniq_send_request_destruct(mca_pml_base_send_request_t* req)
{
}
OBJ_CLASS_INSTANCE(
mca_pml_uniq_send_request_t,
mca_pml_base_send_request_t,
mca_pml_uniq_send_request_construct,
mca_pml_uniq_send_request_destruct);
/**
* Schedule message delivery across potentially multiple PTLs.
*
* @param request (IN) Request to schedule
* @return status Error status
*
*/
int mca_pml_uniq_send_request_schedule(mca_ptl_base_send_request_t* req)
{
int rc;
size_t bytes_remaining;
/*
* Only allow one thread in this routine for a given request.
* However, we cannot block callers on a mutex, so simply keep track
* of the number of times the routine has been called and run through
* the scheduling logic once for every call.
*/
if(OPAL_THREAD_ADD32(&req->req_lock,1) == 1) {
mca_pml_uniq_proc_t* proc_pml = (mca_pml_uniq_proc_t*)
mca_pml_uniq_proc_lookup_remote( req->req_send.req_base.req_comm,
req->req_send.req_base.req_peer );
#if PML_UNIQ_ACCEPT_NEXT_PTL
mca_ptl_proc_t* ptl_proc = &(proc_pml->proc_ptl_next);
#else
mca_ptl_proc_t* ptl_proc = &(proc_pml->proc_ptl_first);
#endif /* PML_UNIQ_ACCEPT_NEXT_PTL */
mca_ptl_base_module_t* ptl = ptl_proc->ptl;
/* allocate remaining bytes to PTLs */
bytes_remaining = req->req_send.req_bytes_packed - req->req_offset;
/* The rest of the message will be scheduled over the same PTL (the one in the next field). We try
* to be PTL friendly here so we will respect the maximum size accepted by the PTL.
*/
if( bytes_remaining > ptl->ptl_max_frag_size) {
bytes_remaining = ptl->ptl_max_frag_size;
}
rc = ptl->ptl_put(ptl, ptl_proc->ptl_peer, req, req->req_offset, bytes_remaining, 0);
if(rc == OMPI_SUCCESS) {
bytes_remaining = req->req_send.req_bytes_packed - req->req_offset;
} else { /* unable to complete send - queue for later */
OPAL_THREAD_LOCK(&mca_pml_uniq.uniq_lock);
opal_list_append(&mca_pml_uniq.uniq_send_pending, (opal_list_item_t*)req);
OPAL_THREAD_UNLOCK(&mca_pml_uniq.uniq_lock);
req->req_lock = 0;
return OMPI_ERR_OUT_OF_RESOURCE;
}
OPAL_THREAD_ADD32(&req->req_lock,-1);
/* free the request if completed while in the scheduler */
if (req->req_send.req_base.req_free_called && req->req_send.req_base.req_pml_complete) {
MCA_PML_UNIQ_FREE((ompi_request_t**)&req);
}
return OMPI_SUCCESS;
}
OPAL_THREAD_ADD32(&req->req_lock,-1);
return OMPI_SUCCESS;
}
/**
* Update the status of the send request to reflect the number of bytes
* "actually" sent (and acknowledged). This should be called by the
* lower layer PTL after the fragment is actually delivered and has been
* acknowledged (if required). Note that this routine should NOT be called
* directly by the PTL, a function pointer is setup on the PTL at init to
* enable upcalls into the PML w/out directly linking to a specific PML
* implementation.
*/
void mca_pml_uniq_send_request_progress(
struct mca_ptl_base_module_t* ptl,
mca_ptl_base_send_request_t* req,
size_t bytes_sent)
{
bool schedule = false;
OPAL_THREAD_LOCK(&ompi_request_lock);
req->req_bytes_sent += bytes_sent;
if (req->req_bytes_sent >= req->req_send.req_bytes_packed) {
req->req_send.req_base.req_pml_complete = true;
if (req->req_send.req_base.req_ompi.req_complete == false) {
req->req_send.req_base.req_ompi.req_status.MPI_SOURCE = req->req_send.req_base.req_comm->c_my_rank;
req->req_send.req_base.req_ompi.req_status.MPI_TAG = req->req_send.req_base.req_tag;
req->req_send.req_base.req_ompi.req_status.MPI_ERROR = OMPI_SUCCESS;
req->req_send.req_base.req_ompi.req_status._count = req->req_bytes_sent;
req->req_send.req_base.req_ompi.req_complete = true;
if(ompi_request_waiting) {
opal_condition_broadcast(&ompi_request_cond);
}
} else if(req->req_send.req_base.req_free_called) {
/* don't free the request if in the scheduler */
if(req->req_lock == 0) {
MCA_PML_UNIQ_FREE((ompi_request_t**)&req);
}
} else if (req->req_send.req_send_mode == MCA_PML_BASE_SEND_BUFFERED) {
mca_pml_base_bsend_request_fini((ompi_request_t*)req);
}
/* test to see if we have scheduled the entire request */
} else if (req->req_offset < req->req_send.req_bytes_packed) {
schedule = true;
}
OPAL_THREAD_UNLOCK(&ompi_request_lock);
/* schedule remaining fragments of this request */
if(schedule) {
mca_pml_uniq_send_request_schedule(req);
}
/* check for pending requests that need to be progressed */
while(opal_list_get_size(&mca_pml_uniq.uniq_send_pending) != 0) {
OPAL_THREAD_LOCK(&mca_pml_uniq.uniq_lock);
req = (mca_ptl_base_send_request_t*)opal_list_remove_first(&mca_pml_uniq.uniq_send_pending);
OPAL_THREAD_UNLOCK(&mca_pml_uniq.uniq_lock);
if(req == NULL)
break;
if(mca_pml_uniq_send_request_schedule(req) != OMPI_SUCCESS)
break;
}
}