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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2012-2013 Sandia National Laboratories. All rights reserved.
* Copyright (c) 2014-2017 Los Alamos National Security, LLC. All rights
* reserved.
* Copyright (c) 2015 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2017-2018 Cisco Systems, Inc. All rights reserved
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "osc_pt2pt.h"
#include "osc_pt2pt_frag.h"
#include "osc_pt2pt_data_move.h"
static void ompi_osc_pt2pt_frag_constructor (ompi_osc_pt2pt_frag_t *frag)
{
frag->buffer = frag->super.ptr;
}
OBJ_CLASS_INSTANCE(ompi_osc_pt2pt_frag_t, opal_free_list_item_t,
ompi_osc_pt2pt_frag_constructor, NULL);
static int frag_send_cb (ompi_request_t *request)
{
ompi_osc_pt2pt_frag_t *frag =
(ompi_osc_pt2pt_frag_t*) request->req_complete_cb_data;
ompi_osc_pt2pt_module_t *module = frag->module;
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
"osc pt2pt: frag_send complete to %d, frag = %p, request = %p",
frag->target, (void *) frag, (void *) request));
mark_outgoing_completion(module);
opal_free_list_return (&mca_osc_pt2pt_component.frags, &frag->super);
ompi_request_free (&request);
return 1;
}
static int frag_send (ompi_osc_pt2pt_module_t *module, ompi_osc_pt2pt_frag_t *frag)
{
int count;
count = (int)((uintptr_t) frag->top - (uintptr_t) frag->buffer);
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
"osc pt2pt: frag_send called to %d, frag = %p, count = %d",
frag->target, (void *) frag, count));
OSC_PT2PT_HTON(frag->header, module, frag->target);
return ompi_osc_pt2pt_isend_w_cb (frag->buffer, count, MPI_BYTE, frag->target, OSC_PT2PT_FRAG_TAG,
module->comm, frag_send_cb, frag);
}
int ompi_osc_pt2pt_frag_start (ompi_osc_pt2pt_module_t *module,
ompi_osc_pt2pt_frag_t *frag)
{
ompi_osc_pt2pt_peer_t *peer = ompi_osc_pt2pt_peer_lookup (module, frag->target);
int ret;
assert(0 == frag->pending && peer->active_frag != frag);
/* we need to signal now that a frag is outgoing to ensure the count sent
* with the unlock message is correct */
ompi_osc_signal_outgoing (module, frag->target, 1);
/* if eager sends are not active, can't send yet, so buffer and
get out... */
if (!ompi_osc_pt2pt_peer_sends_active (module, frag->target) || opal_list_get_size (&peer->queued_frags)) {
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output, "queuing fragment to peer %d",
frag->target));
OPAL_THREAD_SCOPED_LOCK(&peer->lock,
opal_list_append(&peer->queued_frags, (opal_list_item_t *) frag));
return OMPI_SUCCESS;
}
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output, "sending fragment to peer %d",
frag->target));
ret = frag_send(module, frag);
opal_condition_broadcast(&module->cond);
return ret;
}
static int ompi_osc_pt2pt_flush_active_frag (ompi_osc_pt2pt_module_t *module, ompi_osc_pt2pt_peer_t *peer)
{
ompi_osc_pt2pt_frag_t *active_frag = peer->active_frag;
int ret = OMPI_SUCCESS;
if (NULL == active_frag) {
/* nothing to do */
return OMPI_SUCCESS;
}
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
"osc pt2pt: flushing active fragment to target %d. pending: %d",
active_frag->target, active_frag->pending));
if (opal_atomic_compare_exchange_strong_ptr (&peer->active_frag, &active_frag, NULL)) {
if (0 != OPAL_THREAD_ADD_FETCH32(&active_frag->pending, -1)) {
/* communication going on while synchronizing; this is an rma usage bug */
return OMPI_ERR_RMA_SYNC;
}
ompi_osc_signal_outgoing (module, active_frag->target, 1);
ret = frag_send (module, active_frag);
}
return ret;
}
int ompi_osc_pt2pt_frag_flush_pending (ompi_osc_pt2pt_module_t *module, int target)
{
ompi_osc_pt2pt_peer_t *peer = ompi_osc_pt2pt_peer_lookup (module, target);
ompi_osc_pt2pt_frag_t *frag;
int ret = OMPI_SUCCESS;
/* walk through the pending list and send */
OPAL_THREAD_LOCK(&peer->lock);
while (NULL != (frag = ((ompi_osc_pt2pt_frag_t *) opal_list_remove_first (&peer->queued_frags)))) {
ret = frag_send(module, frag);
if (OPAL_UNLIKELY(OMPI_SUCCESS != ret)) {
break;
}
}
OPAL_THREAD_UNLOCK(&peer->lock);
return ret;
}
int ompi_osc_pt2pt_frag_flush_pending_all (ompi_osc_pt2pt_module_t *module)
{
int ret = OPAL_SUCCESS;
for (int i = 0 ; i < ompi_comm_size (module->comm) ; ++i) {
ret = ompi_osc_pt2pt_frag_flush_pending (module, i);
if (OPAL_UNLIKELY(OMPI_SUCCESS != ret)) {
return ret;
}
}
return ret;
}
int ompi_osc_pt2pt_frag_flush_target (ompi_osc_pt2pt_module_t *module, int target)
{
ompi_osc_pt2pt_peer_t *peer = ompi_osc_pt2pt_peer_lookup (module, target);
int ret = OMPI_SUCCESS;
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
"osc pt2pt: frag flush to target target %d. queue fragments: %lu",
target, (unsigned long) opal_list_get_size (&peer->queued_frags)));
ret = ompi_osc_pt2pt_frag_flush_pending (module, target);
if (OMPI_SUCCESS != ret) {
/* XXX -- TODO -- better error handling */
return ret;
}
/* flush the active frag */
ret = ompi_osc_pt2pt_flush_active_frag (module, peer);
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
"osc pt2pt: frag flush target %d finished", target));
return ret;
}
int ompi_osc_pt2pt_frag_flush_all (ompi_osc_pt2pt_module_t *module)
{
int ret = OMPI_SUCCESS;
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
"osc pt2pt: frag flush all begin"));
/* try to start frags queued to all peers */
for (int i = 0 ; i < ompi_comm_size (module->comm) ; ++i) {
ret = ompi_osc_pt2pt_frag_flush_target (module, i);
if (OMPI_SUCCESS != ret) {
break;
}
}
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
"osc pt2pt: frag flush all done. ret: %d", ret));
return ret;
}
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