948 строки
32 KiB
C
948 строки
32 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
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/*
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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 (c) 2007-2015 Los Alamos National Security, LLC. All rights
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* reserved.
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* Copyright (c) 2010 IBM Corporation. All rights reserved.
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* Copyright (c) 2012-2013 Sandia National Laboratories. All rights reserved.
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* Copyright (c) 2015 Intel, Inc. 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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#include "ompi_config.h"
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#include "osc_pt2pt.h"
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#include "osc_pt2pt_header.h"
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#include "osc_pt2pt_data_move.h"
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#include "osc_pt2pt_frag.h"
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#include "mpi.h"
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#include "opal/runtime/opal_progress.h"
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#include "opal/threads/mutex.h"
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#include "ompi/communicator/communicator.h"
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#include "ompi/mca/osc/base/base.h"
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#include "opal/include/opal_stdint.h"
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static bool ompi_osc_pt2pt_lock_try_acquire (ompi_osc_pt2pt_module_t* module, int source, int lock_type,
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uint64_t serial_number);
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/* target-side tracking of a lock request */
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struct ompi_osc_pt2pt_pending_lock_t {
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opal_list_item_t super;
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int peer;
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int lock_type;
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uint64_t lock_ptr;
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};
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typedef struct ompi_osc_pt2pt_pending_lock_t ompi_osc_pt2pt_pending_lock_t;
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OBJ_CLASS_INSTANCE(ompi_osc_pt2pt_pending_lock_t, opal_list_item_t,
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NULL, NULL);
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/* origin-side tracking of a lock request */
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struct ompi_osc_pt2pt_outstanding_lock_t {
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opal_list_item_t super;
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int target;
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int assert;
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bool flushing;
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int32_t lock_acks_expected;
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int32_t unlock_acks_expected;
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int32_t flush_acks_expected;
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uint64_t serial_number;
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int32_t type;
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};
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typedef struct ompi_osc_pt2pt_outstanding_lock_t ompi_osc_pt2pt_outstanding_lock_t;
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OBJ_CLASS_INSTANCE(ompi_osc_pt2pt_outstanding_lock_t, opal_list_item_t,
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NULL, NULL);
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static int ompi_osc_activate_next_lock (ompi_osc_pt2pt_module_t *module);
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static inline int queue_lock (ompi_osc_pt2pt_module_t *module, int requestor, int lock_type, uint64_t lock_ptr);
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static int ompi_osc_pt2pt_flush_lock (ompi_osc_pt2pt_module_t *module, ompi_osc_pt2pt_outstanding_lock_t *lock,
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int target);
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/**
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* Find the first outstanding lock to a target.
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*
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* @param[in] module - OSC PT2PT module
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* @param[in] target - Target rank
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*
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* @returns an outstanding lock on success
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*
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* This function traverses the outstanding_locks list in the module
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* looking for a lock that matches target. The caller must hold the
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* module lock.
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*/
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static inline ompi_osc_pt2pt_outstanding_lock_t *find_outstanding_lock_st (ompi_osc_pt2pt_module_t *module, int target)
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{
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ompi_osc_pt2pt_outstanding_lock_t *outstanding_lock, *lock = NULL;
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OPAL_LIST_FOREACH(outstanding_lock, &module->outstanding_locks, ompi_osc_pt2pt_outstanding_lock_t) {
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if (outstanding_lock->target == target) {
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lock = outstanding_lock;
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break;
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}
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}
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return lock;
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}
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static inline ompi_osc_pt2pt_outstanding_lock_t *find_outstanding_lock (ompi_osc_pt2pt_module_t *module, int target)
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{
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ompi_osc_pt2pt_outstanding_lock_t *lock;
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OPAL_THREAD_LOCK(&module->lock);
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lock = find_outstanding_lock_st (module, target);
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OPAL_THREAD_UNLOCK(&module->lock);
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return lock;
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}
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static inline ompi_osc_pt2pt_outstanding_lock_t *find_outstanding_lock_by_serial (ompi_osc_pt2pt_module_t *module, uint64_t serial_number)
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{
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ompi_osc_pt2pt_outstanding_lock_t *outstanding_lock, *lock = NULL;
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OPAL_THREAD_LOCK(&module->lock);
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OPAL_LIST_FOREACH(outstanding_lock, &module->outstanding_locks, ompi_osc_pt2pt_outstanding_lock_t) {
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if (outstanding_lock->serial_number == serial_number) {
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lock = outstanding_lock;
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break;
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}
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}
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OPAL_THREAD_UNLOCK(&module->lock);
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return lock;
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}
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static inline int ompi_osc_pt2pt_lock_self (ompi_osc_pt2pt_module_t *module, ompi_osc_pt2pt_outstanding_lock_t *lock)
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{
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const int my_rank = ompi_comm_rank (module->comm);
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bool acquired = false;
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acquired = ompi_osc_pt2pt_lock_try_acquire (module, my_rank, lock->type, (uint64_t) (uintptr_t) lock);
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if (!acquired) {
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/* queue the lock */
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queue_lock (module, my_rank, lock->type, (uint64_t) (uintptr_t) lock);
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/* If locking local, can't be non-blocking according to the
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standard. We need to wait for the ack here. */
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OPAL_THREAD_LOCK(&module->lock);
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while (lock->lock_acks_expected) {
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opal_condition_wait(&module->cond, &module->lock);
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}
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OPAL_THREAD_UNLOCK(&module->lock);
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}
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OPAL_OUTPUT_VERBOSE((25, ompi_osc_base_framework.framework_output,
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"local lock aquired"));
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return OMPI_SUCCESS;
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}
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static inline void ompi_osc_pt2pt_unlock_self (ompi_osc_pt2pt_module_t *module, ompi_osc_pt2pt_outstanding_lock_t *lock)
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{
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OPAL_OUTPUT_VERBOSE((25, ompi_osc_base_framework.framework_output,
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"ompi_osc_pt2pt_unlock_self: unlocking myself. lock state = %d", module->lock_status));
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if (MPI_LOCK_EXCLUSIVE == lock->type) {
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OPAL_THREAD_ADD32(&module->lock_status, 1);
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ompi_osc_activate_next_lock (module);
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} else if (0 == OPAL_THREAD_ADD32(&module->lock_status, -1)) {
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ompi_osc_activate_next_lock (module);
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}
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/* need to ensure we make progress */
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opal_progress();
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OPAL_THREAD_ADD32(&lock->unlock_acks_expected, -1);
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}
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static inline int ompi_osc_pt2pt_lock_remote (ompi_osc_pt2pt_module_t *module, int target, ompi_osc_pt2pt_outstanding_lock_t *lock)
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{
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ompi_osc_pt2pt_header_lock_t lock_req;
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int ret;
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/* generate a lock request */
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lock_req.base.type = OMPI_OSC_PT2PT_HDR_TYPE_LOCK_REQ;
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lock_req.base.flags = OMPI_OSC_PT2PT_HDR_FLAG_VALID | OMPI_OSC_PT2PT_HDR_FLAG_PASSIVE_TARGET;
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lock_req.lock_type = lock->type;
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lock_req.lock_ptr = (uint64_t) (uintptr_t) lock;
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ret = ompi_osc_pt2pt_control_send (module, target, &lock_req, sizeof (lock_req));
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if (OPAL_UNLIKELY(OMPI_SUCCESS != ret)) {
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return ret;
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}
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/* make sure the request gets sent, so we can start eager sending... */
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ret = ompi_osc_pt2pt_frag_flush_target (module, target);
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return ret;
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}
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static inline int ompi_osc_pt2pt_unlock_remote (ompi_osc_pt2pt_module_t *module, int target, ompi_osc_pt2pt_outstanding_lock_t *lock)
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{
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ompi_osc_pt2pt_peer_t *peer = module->peers + target;
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ompi_osc_pt2pt_header_unlock_t unlock_req;
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int32_t frag_count = opal_atomic_swap_32 ((int32_t *) module->epoch_outgoing_frag_count + target, -1);
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unlock_req.base.type = OMPI_OSC_PT2PT_HDR_TYPE_UNLOCK_REQ;
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unlock_req.base.flags = OMPI_OSC_PT2PT_HDR_FLAG_VALID | OMPI_OSC_PT2PT_HDR_FLAG_PASSIVE_TARGET;
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unlock_req.frag_count = frag_count;
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unlock_req.lock_type = lock->type;
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unlock_req.lock_ptr = (uint64_t) (uintptr_t) lock;
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if (peer->active_frag && peer->active_frag->remain_len < sizeof (unlock_req)) {
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/* the peer should expect one more packet */
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++unlock_req.frag_count;
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--module->epoch_outgoing_frag_count[target];
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}
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OPAL_OUTPUT_VERBOSE((25, ompi_osc_base_framework.framework_output,
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"osc pt2pt: unlocking target %d, frag count: %d", target,
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unlock_req.frag_count));
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/* send control message with unlock request and count */
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return ompi_osc_pt2pt_control_send (module, target, &unlock_req, sizeof (unlock_req));
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}
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static inline int ompi_osc_pt2pt_flush_remote (ompi_osc_pt2pt_module_t *module, int target, ompi_osc_pt2pt_outstanding_lock_t *lock)
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{
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ompi_osc_pt2pt_peer_t *peer = module->peers + target;
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ompi_osc_pt2pt_header_flush_t flush_req;
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int32_t frag_count = opal_atomic_swap_32 ((int32_t *) module->epoch_outgoing_frag_count + target, -1);
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int ret;
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flush_req.base.type = OMPI_OSC_PT2PT_HDR_TYPE_FLUSH_REQ;
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flush_req.base.flags = OMPI_OSC_PT2PT_HDR_FLAG_VALID | OMPI_OSC_PT2PT_HDR_FLAG_PASSIVE_TARGET;
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flush_req.frag_count = frag_count;
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flush_req.serial_number = lock->serial_number;
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/* XXX -- TODO -- since fragment are always delivered in order we do not need to count anything but long
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* requests. once that is done this can be removed. */
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if (peer->active_frag && (peer->active_frag->remain_len < sizeof (flush_req))) {
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/* the peer should expect one more packet */
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++flush_req.frag_count;
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--module->epoch_outgoing_frag_count[target];
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}
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OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output, "flushing to target %d, frag_count: %d",
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target, flush_req.frag_count));
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/* send control message with unlock request and count */
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ret = ompi_osc_pt2pt_control_send (module, target, &flush_req, sizeof (flush_req));
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if (OPAL_UNLIKELY(OMPI_SUCCESS != ret)) {
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return ret;
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}
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/* start all sendreqs to target */
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return ompi_osc_pt2pt_frag_flush_target (module, target);
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}
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static int ompi_osc_pt2pt_lock_internal_execute (ompi_osc_pt2pt_module_t *module, ompi_osc_pt2pt_outstanding_lock_t *lock)
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{
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int my_rank = ompi_comm_rank (module->comm);
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int target = lock->target;
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int assert = lock->assert;
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int ret;
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if (0 == (assert & MPI_MODE_NOCHECK)) {
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lock->lock_acks_expected = (-1 == target) ? ompi_comm_size (module->comm) : 1;
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lock->unlock_acks_expected = lock->lock_acks_expected;
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if (my_rank != target && target != -1) {
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ret = ompi_osc_pt2pt_lock_remote (module, target, lock);
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} else {
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ret = ompi_osc_pt2pt_lock_self (module, lock);
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}
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if (OPAL_UNLIKELY(OMPI_SUCCESS != ret)) {
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/* return */
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return ret;
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}
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if (-1 == target) {
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for (int i = 0 ; i < ompi_comm_size(module->comm) ; ++i) {
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if (my_rank == i) {
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continue;
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}
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ret = ompi_osc_pt2pt_lock_remote (module, i, lock);
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if (OPAL_UNLIKELY(OMPI_SUCCESS != ret)) {
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return ret;
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}
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}
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}
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}
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return OMPI_SUCCESS;
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}
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static int ompi_osc_pt2pt_lock_internal (int lock_type, int target, int assert, ompi_win_t *win)
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{
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ompi_osc_pt2pt_module_t *module = GET_MODULE(win);
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ompi_osc_pt2pt_outstanding_lock_t *lock;
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ompi_osc_pt2pt_peer_t *peer = NULL;
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int ret = OMPI_SUCCESS;
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if (-1 != target) {
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peer = module->peers + target;
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}
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/* Check if no_locks is set. TODO: we also need to track whether we are in an
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* active target epoch. Fence can make this tricky to track. */
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if (module->sc_group) {
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return OMPI_ERR_RMA_SYNC;
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}
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OPAL_OUTPUT_VERBOSE((25, ompi_osc_base_framework.framework_output,
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"osc pt2pt: lock %d %d", target, lock_type));
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/* create lock item */
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lock = OBJ_NEW(ompi_osc_pt2pt_outstanding_lock_t);
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if (OPAL_UNLIKELY(NULL == lock)) {
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return OMPI_ERR_OUT_OF_RESOURCE;
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}
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lock->target = target;
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lock->lock_acks_expected = 0;
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lock->unlock_acks_expected = 0;
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lock->serial_number = OPAL_THREAD_ADD64((int64_t *) &module->lock_serial_number, 1);
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lock->type = lock_type;
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lock->assert = assert;
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/* delay all eager sends until we've heard back.. */
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OPAL_THREAD_LOCK(&module->lock);
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/* check for conflicting lock */
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if (find_outstanding_lock_st (module, target)) {
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OBJ_RELEASE(lock);
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OPAL_THREAD_UNLOCK(&module->lock);
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return OMPI_ERR_RMA_CONFLICT;
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}
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/* when the lock ack returns we will be in an access epoch with this peer/all peers (target = -1) */
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if (-1 == target) {
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module->all_access_epoch = true;
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} else {
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peer->access_epoch = true;
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}
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++module->passive_target_access_epoch;
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opal_list_append(&module->outstanding_locks, &lock->super);
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OPAL_THREAD_UNLOCK(&module->lock);
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ret = ompi_osc_pt2pt_lock_internal_execute (module, lock);
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if (OPAL_UNLIKELY(OMPI_SUCCESS != ret)) {
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OPAL_THREAD_SCOPED_LOCK(&module->lock,
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opal_list_remove_item(&module->outstanding_locks, &lock->super));
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OBJ_RELEASE(lock);
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}
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return ret;
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}
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static int ompi_osc_pt2pt_unlock_internal (int target, ompi_win_t *win)
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{
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ompi_osc_pt2pt_module_t *module = GET_MODULE(win);
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ompi_osc_pt2pt_outstanding_lock_t *lock = NULL;
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int my_rank = ompi_comm_rank (module->comm);
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ompi_osc_pt2pt_peer_t *peer = NULL;
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int ret = OMPI_SUCCESS;
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if (-1 != target) {
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peer = module->peers + target;
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}
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OPAL_OUTPUT_VERBOSE((25, ompi_osc_base_framework.framework_output,
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"ompi_osc_pt2pt_unlock_internal: unlocking target %d", target));
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OPAL_THREAD_LOCK(&module->lock);
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lock = find_outstanding_lock_st (module, target);
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if (OPAL_UNLIKELY(NULL == lock)) {
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OPAL_OUTPUT_VERBOSE((25, ompi_osc_base_framework.framework_output,
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"ompi_osc_pt2pt_unlock: target %d is not locked in window %s",
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target, win->w_name));
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OPAL_THREAD_UNLOCK(&module->lock);
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return OMPI_ERR_RMA_SYNC;
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}
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opal_list_remove_item (&module->outstanding_locks, &lock->super);
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OPAL_OUTPUT_VERBOSE((25, ompi_osc_base_framework.framework_output,
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"ompi_osc_pt2pt_unlock_internal: lock acks still expected: %d",
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lock->lock_acks_expected));
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/* wait until ack has arrived from target */
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while (lock->lock_acks_expected) {
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opal_condition_wait(&module->cond, &module->lock);
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}
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OPAL_THREAD_UNLOCK(&module->lock);
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OPAL_OUTPUT_VERBOSE((25, ompi_osc_base_framework.framework_output,
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"ompi_osc_pt2pt_unlock_internal: all lock acks received"));
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if (lock->assert & MPI_MODE_NOCHECK) {
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/* flush instead */
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ompi_osc_pt2pt_flush_lock (module, lock, target);
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} else if (my_rank != target) {
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if (-1 == target) {
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/* send unlock messages to all of my peers */
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for (int i = 0 ; i < ompi_comm_size(module->comm) ; ++i) {
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if (my_rank == i) {
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continue;
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}
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ret = ompi_osc_pt2pt_unlock_remote (module, i, lock);
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if (OPAL_UNLIKELY(OMPI_SUCCESS != ret)) {
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return ret;
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}
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}
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ompi_osc_pt2pt_unlock_self (module, lock);
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} else {
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ret = ompi_osc_pt2pt_unlock_remote (module, target, lock);
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if (OPAL_UNLIKELY(OMPI_SUCCESS != ret)) {
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return ret;
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}
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}
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/* start all sendreqs to target */
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if (-1 == target) {
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ret = ompi_osc_pt2pt_frag_flush_all (module);
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} else {
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ret = ompi_osc_pt2pt_frag_flush_target(module, target);
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}
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if (OPAL_UNLIKELY(OMPI_SUCCESS != ret)) {
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return ret;
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}
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/* wait for unlock acks. this signals remote completion of fragments */
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OPAL_THREAD_LOCK(&module->lock);
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while (lock->unlock_acks_expected) {
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opal_condition_wait(&module->cond, &module->lock);
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}
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OPAL_THREAD_UNLOCK(&module->lock);
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OPAL_OUTPUT_VERBOSE((25, ompi_osc_base_framework.framework_output,
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"ompi_osc_pt2pt_unlock: unlock of %d complete", target));
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} else {
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ompi_osc_pt2pt_unlock_self (module, lock);
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}
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OPAL_THREAD_LOCK(&module->lock);
|
|
if (-1 != target) {
|
|
peer->access_epoch = false;
|
|
} else {
|
|
module->all_access_epoch = false;
|
|
}
|
|
--module->passive_target_access_epoch;
|
|
OPAL_THREAD_UNLOCK(&module->lock);
|
|
|
|
OBJ_RELEASE(lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ompi_osc_pt2pt_lock(int lock_type, int target, int assert, ompi_win_t *win)
|
|
{
|
|
assert(target >= 0);
|
|
|
|
return ompi_osc_pt2pt_lock_internal (lock_type, target, assert, win);
|
|
}
|
|
|
|
int ompi_osc_pt2pt_unlock (int target, struct ompi_win_t *win)
|
|
{
|
|
return ompi_osc_pt2pt_unlock_internal (target, win);
|
|
}
|
|
|
|
int ompi_osc_pt2pt_lock_all(int assert, struct ompi_win_t *win)
|
|
{
|
|
return ompi_osc_pt2pt_lock_internal (MPI_LOCK_SHARED, -1, assert, win);
|
|
}
|
|
|
|
|
|
int ompi_osc_pt2pt_unlock_all (struct ompi_win_t *win)
|
|
{
|
|
return ompi_osc_pt2pt_unlock_internal (-1, win);
|
|
}
|
|
|
|
|
|
int ompi_osc_pt2pt_sync (struct ompi_win_t *win)
|
|
{
|
|
opal_progress();
|
|
return OMPI_SUCCESS;
|
|
}
|
|
|
|
static int ompi_osc_pt2pt_flush_lock (ompi_osc_pt2pt_module_t *module, ompi_osc_pt2pt_outstanding_lock_t *lock,
|
|
int target)
|
|
{
|
|
int ret;
|
|
int my_rank = ompi_comm_rank (module->comm);
|
|
|
|
/* wait until ack has arrived from target, since we need to be
|
|
able to eager send before we can transfer all the data... */
|
|
OPAL_THREAD_LOCK(&module->lock);
|
|
while (lock->lock_acks_expected && lock->flushing) {
|
|
opal_condition_wait(&module->cond, &module->lock);
|
|
}
|
|
|
|
lock->flushing = true;
|
|
|
|
if (-1 == target) {
|
|
lock->flush_acks_expected = ompi_comm_size(module->comm) - 1;
|
|
} else {
|
|
lock->flush_acks_expected = 1;
|
|
}
|
|
|
|
OPAL_THREAD_UNLOCK(&module->lock);
|
|
|
|
if (-1 == target) {
|
|
/* NTH: no local flush */
|
|
for (int i = 0 ; i < ompi_comm_size(module->comm) ; ++i) {
|
|
if (i == my_rank) {
|
|
continue;
|
|
}
|
|
|
|
ret = ompi_osc_pt2pt_flush_remote (module, i, lock);
|
|
if (OPAL_UNLIKELY(OMPI_SUCCESS != ret)) {
|
|
return ret;
|
|
}
|
|
}
|
|
} else {
|
|
|
|
/* send control message with flush request and count */
|
|
ret = ompi_osc_pt2pt_flush_remote (module, target, lock);
|
|
if (OPAL_UNLIKELY(OMPI_SUCCESS != ret)) {
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* wait for all the requests and the flush ack (meaning remote completion) */
|
|
OPAL_THREAD_LOCK(&module->lock);
|
|
while (lock->flush_acks_expected) {
|
|
opal_condition_wait(&module->cond, &module->lock);
|
|
}
|
|
|
|
lock->flushing = false;
|
|
opal_condition_broadcast(&module->cond);
|
|
|
|
OPAL_THREAD_UNLOCK(&module->lock);
|
|
|
|
return OMPI_SUCCESS;
|
|
}
|
|
|
|
int ompi_osc_pt2pt_flush (int target, struct ompi_win_t *win)
|
|
{
|
|
ompi_osc_pt2pt_module_t *module = GET_MODULE(win);
|
|
ompi_osc_pt2pt_outstanding_lock_t *lock;
|
|
int ret;
|
|
|
|
assert (0 <= target);
|
|
|
|
/* flush is only allowed from within a passive target epoch */
|
|
if (!module->passive_target_access_epoch) {
|
|
return OMPI_ERR_RMA_SYNC;
|
|
}
|
|
|
|
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
|
|
"ompi_osc_pt2pt_flush starting..."));
|
|
|
|
if (ompi_comm_rank (module->comm) == target) {
|
|
/* nothing to flush */
|
|
opal_progress ();
|
|
return OMPI_SUCCESS;
|
|
}
|
|
|
|
lock = find_outstanding_lock (module, target);
|
|
if (NULL == lock) {
|
|
lock = find_outstanding_lock (module, -1);
|
|
}
|
|
if (OPAL_UNLIKELY(NULL == lock)) {
|
|
OPAL_OUTPUT_VERBOSE((25, ompi_osc_base_framework.framework_output,
|
|
"ompi_osc_pt2pt_flush: target %d is not locked in window %s",
|
|
target, win->w_name));
|
|
ret = OMPI_ERR_RMA_SYNC;
|
|
} else {
|
|
ret = ompi_osc_pt2pt_flush_lock (module, lock, target);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
int ompi_osc_pt2pt_flush_all (struct ompi_win_t *win)
|
|
{
|
|
ompi_osc_pt2pt_module_t *module = GET_MODULE(win);
|
|
ompi_osc_pt2pt_outstanding_lock_t *lock;
|
|
int ret = OMPI_SUCCESS;
|
|
|
|
/* flush is only allowed from within a passive target epoch */
|
|
if (OPAL_UNLIKELY(!module->passive_target_access_epoch ||
|
|
0 == opal_list_get_size (&module->outstanding_locks))) {
|
|
OPAL_OUTPUT_VERBOSE((25, ompi_osc_base_framework.framework_output,
|
|
"ompi_osc_pt2pt_flush_all: no targets are locked in window %s",
|
|
win->w_name));
|
|
return OMPI_ERR_RMA_SYNC;
|
|
}
|
|
|
|
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
|
|
"ompi_osc_pt2pt_flush_all entering..."));
|
|
|
|
/* flush all locks */
|
|
OPAL_LIST_FOREACH(lock, &module->outstanding_locks, ompi_osc_pt2pt_outstanding_lock_t) {
|
|
ret = ompi_osc_pt2pt_flush_lock (module, lock, lock->target);
|
|
if (OPAL_UNLIKELY(OMPI_SUCCESS != ret)) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
|
|
"ompi_osc_pt2pt_flush_all complete"));
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
int ompi_osc_pt2pt_flush_local (int target, struct ompi_win_t *win)
|
|
{
|
|
ompi_osc_pt2pt_module_t *module = GET_MODULE(win);
|
|
int ret;
|
|
|
|
/* flush is only allowed from within a passive target epoch */
|
|
if (!module->passive_target_access_epoch) {
|
|
return OMPI_ERR_RMA_SYNC;
|
|
}
|
|
|
|
ret = ompi_osc_pt2pt_frag_flush_target(module, target);
|
|
if (OMPI_SUCCESS != ret) {
|
|
return ret;
|
|
}
|
|
|
|
/* wait for all the requests */
|
|
OPAL_THREAD_LOCK(&module->lock);
|
|
while (module->outgoing_frag_count != module->outgoing_frag_signal_count) {
|
|
opal_condition_wait(&module->cond, &module->lock);
|
|
}
|
|
OPAL_THREAD_UNLOCK(&module->lock);
|
|
|
|
return OMPI_SUCCESS;
|
|
}
|
|
|
|
|
|
int ompi_osc_pt2pt_flush_local_all (struct ompi_win_t *win)
|
|
{
|
|
ompi_osc_pt2pt_module_t *module = GET_MODULE(win);
|
|
int ret = OMPI_SUCCESS;
|
|
|
|
/* flush is only allowed from within a passive target epoch */
|
|
if (!module->passive_target_access_epoch) {
|
|
return OMPI_ERR_RMA_SYNC;
|
|
}
|
|
|
|
ret = ompi_osc_pt2pt_frag_flush_all(module);
|
|
if (OMPI_SUCCESS != ret) {
|
|
return ret;
|
|
}
|
|
|
|
/* wait for all the requests */
|
|
OPAL_THREAD_LOCK(&module->lock);
|
|
while (module->outgoing_frag_count != module->outgoing_frag_signal_count) {
|
|
opal_condition_wait(&module->cond, &module->lock);
|
|
}
|
|
OPAL_THREAD_UNLOCK(&module->lock);
|
|
|
|
return OMPI_SUCCESS;
|
|
}
|
|
|
|
/* target side operation to acknowledge to initiator side that the
|
|
lock is now held by the initiator */
|
|
static inline int activate_lock (ompi_osc_pt2pt_module_t *module, int requestor,
|
|
uint64_t lock_ptr)
|
|
{
|
|
ompi_osc_pt2pt_outstanding_lock_t *lock;
|
|
|
|
if (ompi_comm_rank (module->comm) != requestor) {
|
|
ompi_osc_pt2pt_header_lock_ack_t lock_ack;
|
|
|
|
lock_ack.base.type = OMPI_OSC_PT2PT_HDR_TYPE_LOCK_ACK;
|
|
lock_ack.base.flags = OMPI_OSC_PT2PT_HDR_FLAG_VALID;
|
|
lock_ack.source = ompi_comm_rank(module->comm);
|
|
lock_ack.windx = ompi_comm_get_cid(module->comm);
|
|
lock_ack.lock_ptr = lock_ptr;
|
|
|
|
OPAL_OUTPUT_VERBOSE((25, ompi_osc_base_framework.framework_output,
|
|
"osc pt2pt: sending lock to %d", requestor));
|
|
|
|
/* we don't want to send any data, since we're the exposure
|
|
epoch only, so use an unbuffered send */
|
|
return ompi_osc_pt2pt_control_send_unbuffered (module, requestor, &lock_ack, sizeof (lock_ack));
|
|
}
|
|
|
|
|
|
OPAL_OUTPUT_VERBOSE((25, ompi_osc_base_framework.framework_output,
|
|
"osc pt2pt: releasing local lock"));
|
|
|
|
lock = (ompi_osc_pt2pt_outstanding_lock_t *) (uintptr_t) lock_ptr;
|
|
if (OPAL_UNLIKELY(NULL == lock)) {
|
|
OPAL_OUTPUT_VERBOSE((5, ompi_osc_base_framework.framework_output,
|
|
"lock could not be located"));
|
|
}
|
|
|
|
if (0 == OPAL_THREAD_ADD32(&lock->lock_acks_expected, -1)) {
|
|
opal_condition_broadcast (&module->cond);
|
|
}
|
|
|
|
return OMPI_SUCCESS;
|
|
}
|
|
|
|
|
|
/* target side operation to create a pending lock request for a lock
|
|
request that could not be satisfied */
|
|
static inline int queue_lock (ompi_osc_pt2pt_module_t *module, int requestor,
|
|
int lock_type, uint64_t lock_ptr)
|
|
{
|
|
ompi_osc_pt2pt_pending_lock_t *pending =
|
|
OBJ_NEW(ompi_osc_pt2pt_pending_lock_t);
|
|
if (NULL == pending) {
|
|
return OMPI_ERR_OUT_OF_RESOURCE;
|
|
}
|
|
|
|
pending->peer = requestor;
|
|
pending->lock_type = lock_type;
|
|
pending->lock_ptr = lock_ptr;
|
|
|
|
OPAL_OUTPUT_VERBOSE((25, ompi_osc_base_framework.framework_output,
|
|
"osc pt2pt: queueing lock request from %d", requestor));
|
|
|
|
OPAL_THREAD_SCOPED_LOCK(&module->locks_pending_lock, opal_list_append(&module->locks_pending, &pending->super));
|
|
|
|
return OMPI_SUCCESS;
|
|
}
|
|
|
|
static bool ompi_osc_pt2pt_lock_try_acquire (ompi_osc_pt2pt_module_t* module, int source, int lock_type, uint64_t lock_ptr)
|
|
{
|
|
bool queue = false;
|
|
|
|
if (MPI_LOCK_SHARED == lock_type) {
|
|
int32_t lock_status = module->lock_status;
|
|
|
|
do {
|
|
if (lock_status < 0) {
|
|
queue = true;
|
|
break;
|
|
}
|
|
|
|
if (opal_atomic_cmpset_32 (&module->lock_status, lock_status, lock_status + 1)) {
|
|
break;
|
|
}
|
|
|
|
lock_status = module->lock_status;
|
|
} while (1);
|
|
} else {
|
|
queue = !opal_atomic_cmpset_32 (&module->lock_status, 0, -1);
|
|
}
|
|
|
|
if (queue) {
|
|
return false;
|
|
}
|
|
|
|
activate_lock(module, source, lock_ptr);
|
|
|
|
/* activated the lock */
|
|
return true;
|
|
}
|
|
|
|
static int ompi_osc_activate_next_lock (ompi_osc_pt2pt_module_t *module) {
|
|
/* release any other pending locks we can */
|
|
ompi_osc_pt2pt_pending_lock_t *pending_lock, *next;
|
|
int ret = OMPI_SUCCESS;
|
|
|
|
OPAL_THREAD_LOCK(&module->locks_pending_lock);
|
|
OPAL_LIST_FOREACH_SAFE(pending_lock, next, &module->locks_pending,
|
|
ompi_osc_pt2pt_pending_lock_t) {
|
|
bool acquired = ompi_osc_pt2pt_lock_try_acquire (module, pending_lock->peer, pending_lock->lock_type,
|
|
pending_lock->lock_ptr);
|
|
if (!acquired) {
|
|
break;
|
|
}
|
|
|
|
opal_list_remove_item (&module->locks_pending, &pending_lock->super);
|
|
OBJ_RELEASE(pending_lock);
|
|
}
|
|
OPAL_THREAD_UNLOCK(&module->locks_pending_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
/* target side function called when the initiator sends a lock
|
|
request. Lock will either be activated and acknowledged or
|
|
queued. */
|
|
int ompi_osc_pt2pt_process_lock (ompi_osc_pt2pt_module_t* module, int source,
|
|
ompi_osc_pt2pt_header_lock_t* lock_header)
|
|
{
|
|
bool acquired;
|
|
|
|
OPAL_OUTPUT_VERBOSE((25, ompi_osc_base_framework.framework_output,
|
|
"ompi_osc_pt2pt_process_lock: processing lock request from %d. current lock state = %d",
|
|
source, module->lock_status));
|
|
|
|
acquired = ompi_osc_pt2pt_lock_try_acquire (module, source, lock_header->lock_type, lock_header->lock_ptr);
|
|
|
|
if (!acquired) {
|
|
queue_lock(module, source, lock_header->lock_type, lock_header->lock_ptr);
|
|
}
|
|
|
|
return OMPI_SUCCESS;
|
|
}
|
|
|
|
|
|
/* initiator-side function called when the target acks the lock
|
|
request. */
|
|
void ompi_osc_pt2pt_process_lock_ack (ompi_osc_pt2pt_module_t *module,
|
|
ompi_osc_pt2pt_header_lock_ack_t *lock_ack_header)
|
|
{
|
|
ompi_osc_pt2pt_peer_t *peer = module->peers + lock_ack_header->source;
|
|
ompi_osc_pt2pt_outstanding_lock_t *lock;
|
|
|
|
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
|
|
"ompi_osc_pt2pt_process_lock_ack: processing lock ack from %d for lock %" PRIu64,
|
|
lock_ack_header->source, lock_ack_header->lock_ptr));
|
|
|
|
lock = (ompi_osc_pt2pt_outstanding_lock_t *) (uintptr_t) lock_ack_header->lock_ptr;
|
|
assert (NULL != lock);
|
|
|
|
/* no need to hold the lock to set this */
|
|
peer->eager_send_active = true;
|
|
if (0 == OPAL_THREAD_ADD32(&lock->lock_acks_expected, -1)) {
|
|
opal_condition_broadcast(&module->cond);
|
|
}
|
|
|
|
opal_condition_broadcast(&module->cond);
|
|
}
|
|
|
|
void ompi_osc_pt2pt_process_flush_ack (ompi_osc_pt2pt_module_t *module, int source,
|
|
ompi_osc_pt2pt_header_flush_ack_t *flush_ack_header) {
|
|
ompi_osc_pt2pt_outstanding_lock_t *lock;
|
|
|
|
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
|
|
"ompi_osc_pt2pt_process_flush_ack: processing flush ack from %d for lock %" PRIu64,
|
|
source, flush_ack_header->serial_number));
|
|
|
|
/* NTH: need to verify that this will work as expected */
|
|
lock = find_outstanding_lock_by_serial (module, flush_ack_header->serial_number);
|
|
assert (NULL != lock);
|
|
|
|
if (0 == OPAL_THREAD_ADD32(&lock->flush_acks_expected, -1)) {
|
|
opal_condition_broadcast(&module->cond);
|
|
}
|
|
|
|
opal_condition_broadcast(&module->cond);
|
|
}
|
|
|
|
void ompi_osc_pt2pt_process_unlock_ack (ompi_osc_pt2pt_module_t *module, int source,
|
|
ompi_osc_pt2pt_header_unlock_ack_t *unlock_ack_header)
|
|
{
|
|
ompi_osc_pt2pt_peer_t *peer = module->peers + source;
|
|
ompi_osc_pt2pt_outstanding_lock_t *lock;
|
|
|
|
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
|
|
"ompi_osc_pt2pt_process_unlock_ack: processing unlock ack from %d",
|
|
source));
|
|
|
|
/* NTH: need to verify that this will work as expected */
|
|
lock = (ompi_osc_pt2pt_outstanding_lock_t *) (intptr_t) unlock_ack_header->lock_ptr;
|
|
assert (NULL != lock);
|
|
|
|
peer->eager_send_active = false;
|
|
|
|
if (0 == OPAL_THREAD_ADD32(&lock->unlock_acks_expected, -1)) {
|
|
opal_condition_broadcast(&module->cond);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Process an unlock request.
|
|
*
|
|
* @param[in] module - OSC PT2PT module
|
|
* @param[in] source - Source rank
|
|
* @param[in] unlock_header - Incoming unlock header
|
|
*
|
|
* This functions is the target-side function for handling an unlock
|
|
* request. Once all pending operations from the target are complete
|
|
* this functions sends an unlock acknowledgement then attempts to
|
|
* active a pending lock if the lock becomes free.
|
|
*/
|
|
int ompi_osc_pt2pt_process_unlock (ompi_osc_pt2pt_module_t *module, int source,
|
|
ompi_osc_pt2pt_header_unlock_t *unlock_header)
|
|
{
|
|
ompi_osc_pt2pt_header_unlock_ack_t unlock_ack;
|
|
ompi_osc_pt2pt_peer_t *peer = module->peers + source;
|
|
int ret;
|
|
|
|
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
|
|
"ompi_osc_pt2pt_process_unlock entering (passive_incoming_frag_count: %d)...",
|
|
peer->passive_incoming_frag_count));
|
|
|
|
/* we cannot block when processing an incoming request */
|
|
if (0 != peer->passive_incoming_frag_count) {
|
|
return OMPI_ERR_WOULD_BLOCK;
|
|
}
|
|
|
|
unlock_ack.base.type = OMPI_OSC_PT2PT_HDR_TYPE_UNLOCK_ACK;
|
|
unlock_ack.base.flags = OMPI_OSC_PT2PT_HDR_FLAG_VALID;
|
|
unlock_ack.lock_ptr = unlock_header->lock_ptr;
|
|
|
|
ret = ompi_osc_pt2pt_control_send_unbuffered (module, source, &unlock_ack, sizeof (unlock_ack));
|
|
if (OPAL_UNLIKELY(OMPI_SUCCESS != ret)) {
|
|
return ret;
|
|
}
|
|
|
|
if (-1 == module->lock_status) {
|
|
OPAL_THREAD_ADD32(&module->lock_status, 1);
|
|
ompi_osc_activate_next_lock (module);
|
|
} else if (0 == OPAL_THREAD_ADD32(&module->lock_status, -1)) {
|
|
ompi_osc_activate_next_lock (module);
|
|
}
|
|
|
|
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
|
|
"osc pt2pt: finished processing unlock fragment"));
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ompi_osc_pt2pt_process_flush (ompi_osc_pt2pt_module_t *module, int source,
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|
ompi_osc_pt2pt_header_flush_t *flush_header)
|
|
{
|
|
ompi_osc_pt2pt_peer_t *peer = module->peers + source;
|
|
ompi_osc_pt2pt_header_flush_ack_t flush_ack;
|
|
|
|
OPAL_OUTPUT_VERBOSE((50, ompi_osc_base_framework.framework_output,
|
|
"ompi_osc_pt2pt_process_flush entering (passive_incoming_frag_count: %d)...",
|
|
peer->passive_incoming_frag_count));
|
|
|
|
/* we cannot block when processing an incoming request */
|
|
if (0 != peer->passive_incoming_frag_count) {
|
|
return OMPI_ERR_WOULD_BLOCK;
|
|
}
|
|
|
|
flush_ack.base.type = OMPI_OSC_PT2PT_HDR_TYPE_FLUSH_ACK;
|
|
flush_ack.base.flags = OMPI_OSC_PT2PT_HDR_FLAG_VALID;
|
|
flush_ack.serial_number = flush_header->serial_number;
|
|
|
|
return ompi_osc_pt2pt_control_send_unbuffered (module, source, &flush_ack, sizeof (flush_ack));
|
|
}
|