1d75b7972f
convertor (when prepared) increase the reference count on the used datatype. This reference count will be released only when the OBJ_DESTRUCT is called on a convertor. However, having to call OBJ_CONSTRUCT and OBJ_DESTRUCT on each request every time we want to use it (even when it come from the cache) is an expensive operation. This can be avoided is the OBJ_DESTRUCT will leave the convertor in exactly the same state as OBJ_CONSTRUCT. With this approach we just have to call OBJ_CONSTRUCT for each convertor once when we initially create the request. This commit was SVN r7813.
219 строки
8.4 KiB
C
219 строки
8.4 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University.
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* All rights reserved.
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* Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
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* All rights reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* 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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/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
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#include "ompi_config.h"
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#include "ompi/include/constants.h"
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#include "mca/pml/pml.h"
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#include "mca/ptl/ptl.h"
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#include "pml_teg.h"
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#include "pml_teg_proc.h"
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#include "pml_teg_sendreq.h"
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#include "pml_teg_recvreq.h"
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static int mca_pml_teg_send_request_fini(struct ompi_request_t** request)
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{
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MCA_PML_TEG_FINI(request);
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return OMPI_SUCCESS;
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}
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static int mca_pml_teg_send_request_free(struct ompi_request_t** request)
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{
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MCA_PML_TEG_FREE(request);
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return OMPI_SUCCESS;
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}
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static int mca_pml_teg_send_request_cancel(struct ompi_request_t* request, int complete)
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{
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/* we dont cancel send requests by now */
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return OMPI_SUCCESS;
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}
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static void mca_pml_teg_send_request_construct(mca_pml_teg_send_request_t* req)
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{
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req->req_cached = false;
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req->req_send.req_base.req_ompi.req_fini = mca_pml_teg_send_request_fini;
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req->req_send.req_base.req_ompi.req_free = mca_pml_teg_send_request_free;
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req->req_send.req_base.req_ompi.req_cancel = mca_pml_teg_send_request_cancel;
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OBJ_CONSTRUCT( &(req->req_send.req_convertor), ompi_convertor_t );
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}
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static void mca_pml_teg_send_request_destruct(mca_pml_teg_send_request_t* req)
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{
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}
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OBJ_CLASS_INSTANCE(
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mca_pml_teg_send_request_t,
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mca_ptl_base_send_request_t,
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mca_pml_teg_send_request_construct,
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mca_pml_teg_send_request_destruct);
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/**
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* Schedule message delivery across potentially multiple PTLs.
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*
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* @param request (IN) Request to schedule
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* @return status Error status
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*
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*/
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int mca_pml_teg_send_request_schedule(mca_ptl_base_send_request_t* req)
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{
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ompi_proc_t *proc;
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mca_pml_teg_proc_t* proc_pml;
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int send_count = 0;
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size_t bytes_remaining;
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size_t num_ptl_avail;
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size_t num_ptl;
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/*
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* Only allow one thread in this routine for a given request.
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* However, we cannot block callers on a mutex, so simply keep track
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* of the number of times the routine has been called and run through
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* the scheduling logic once for every call.
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*/
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if(OPAL_THREAD_ADD32(&req->req_lock,1) == 1) {
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proc = ompi_comm_peer_lookup(req->req_send.req_base.req_comm, req->req_send.req_base.req_peer);
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proc_pml = (mca_pml_teg_proc_t*) proc->proc_pml;
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do {
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/* allocate remaining bytes to PTLs */
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bytes_remaining = req->req_send.req_bytes_packed - req->req_offset;
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num_ptl_avail = proc_pml->proc_ptl_next.ptl_size;
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num_ptl = 0;
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while(bytes_remaining > 0 && num_ptl++ < num_ptl_avail) {
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mca_ptl_proc_t* ptl_proc = mca_ptl_array_get_next(&proc_pml->proc_ptl_next);
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mca_ptl_base_module_t* ptl = ptl_proc->ptl;
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int rc;
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/* if this is the last PTL that is available to use, or the number of
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* bytes remaining in the message is less than the PTLs minimum fragment
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* size, then go ahead and give the rest of the message to this PTL.
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*/
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size_t bytes_to_frag;
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if(num_ptl == num_ptl_avail || bytes_remaining < ptl->ptl_min_frag_size) {
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bytes_to_frag = bytes_remaining;
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/* otherwise attempt to give the PTL a percentage of the message
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* based on a weighting factor. for simplicity calculate this as
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* a percentage of the overall message length (regardless of amount
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* previously assigned)
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*/
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} else {
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bytes_to_frag = (ptl_proc->ptl_weight * bytes_remaining) / 100;
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}
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/* makes sure that we don't exceed ptl_max_frag_size */
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if(ptl->ptl_max_frag_size != 0 && bytes_to_frag > ptl->ptl_max_frag_size)
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bytes_to_frag = ptl->ptl_max_frag_size;
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rc = ptl->ptl_put(ptl, ptl_proc->ptl_peer, req, req->req_offset, bytes_to_frag, 0);
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if(rc == OMPI_SUCCESS) {
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send_count++;
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bytes_remaining = req->req_send.req_bytes_packed - req->req_offset;
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}
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}
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/* unable to complete send - queue for later */
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if(send_count == 0) {
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OPAL_THREAD_LOCK(&mca_pml_teg.teg_lock);
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opal_list_append(&mca_pml_teg.teg_send_pending, (opal_list_item_t*)req);
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OPAL_THREAD_UNLOCK(&mca_pml_teg.teg_lock);
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req->req_lock = 0;
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return OMPI_ERR_OUT_OF_RESOURCE;
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}
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/* fragments completed while scheduling - so retry */
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} while(OPAL_THREAD_ADD32(&req->req_lock,-1) > 0);
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/* free the request if completed while in the scheduler */
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if (req->req_send.req_base.req_free_called && req->req_send.req_base.req_pml_complete) {
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MCA_PML_TEG_FREE((ompi_request_t**)&req);
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}
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}
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return OMPI_SUCCESS;
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}
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/**
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* Update the status of the send request to reflect the number of bytes
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* "actually" sent (and acknowledged). This should be called by the
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* lower layer PTL after the fragment is actually delivered and has been
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* acknowledged (if required). Note that this routine should NOT be called
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* directly by the PTL, a function pointer is setup on the PTL at init to
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* enable upcalls into the PML w/out directly linking to a specific PML
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* implementation.
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*/
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void mca_pml_teg_send_request_progress(
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struct mca_ptl_base_module_t* ptl,
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mca_ptl_base_send_request_t* req,
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size_t bytes_sent)
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{
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bool schedule = false;
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OPAL_THREAD_LOCK(&ompi_request_lock);
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req->req_bytes_sent += bytes_sent;
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if (req->req_bytes_sent >= req->req_send.req_bytes_packed) {
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req->req_send.req_base.req_pml_complete = true;
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if (req->req_send.req_base.req_ompi.req_complete == false) {
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req->req_send.req_base.req_ompi.req_status.MPI_SOURCE = req->req_send.req_base.req_comm->c_my_rank;
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req->req_send.req_base.req_ompi.req_status.MPI_TAG = req->req_send.req_base.req_tag;
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req->req_send.req_base.req_ompi.req_status.MPI_ERROR = OMPI_SUCCESS;
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req->req_send.req_base.req_ompi.req_status._count = req->req_bytes_sent;
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req->req_send.req_base.req_ompi.req_complete = true;
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if(ompi_request_waiting) {
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opal_condition_broadcast(&ompi_request_cond);
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}
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} else if(req->req_send.req_base.req_free_called) {
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/* don't free the request if in the scheduler */
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if(req->req_lock == 0) {
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MCA_PML_TEG_FREE((ompi_request_t**)&req);
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}
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} else if (req->req_send.req_send_mode == MCA_PML_BASE_SEND_BUFFERED) {
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mca_pml_base_bsend_request_fini((ompi_request_t*)req);
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}
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/* test to see if we have scheduled the entire request */
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} else if (req->req_offset < req->req_send.req_bytes_packed) {
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schedule = true;
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}
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OPAL_THREAD_UNLOCK(&ompi_request_lock);
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/* schedule remaining fragments of this request */
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if(schedule) {
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mca_pml_teg_send_request_schedule(req);
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}
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/* check for pending requests that need to be progressed */
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while(opal_list_get_size(&mca_pml_teg.teg_send_pending) != 0) {
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OPAL_THREAD_LOCK(&mca_pml_teg.teg_lock);
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req = (mca_ptl_base_send_request_t*)opal_list_remove_first(&mca_pml_teg.teg_send_pending);
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OPAL_THREAD_UNLOCK(&mca_pml_teg.teg_lock);
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if(req == NULL)
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break;
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if(mca_pml_teg_send_request_schedule(req) != OMPI_SUCCESS)
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break;
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}
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}
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