08e267b811
This commit add protection to the group, ob1, and bml endpoint lookup code. For ob1 and the bml a lock has been added. For performance reasons the lock is only held if a bml or ob1 endpoint does not exist. ompi_group_dense_lookup no uses opal_atomic_cmpset to ensure the proc is only retained by the thread that actually updates the group. Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
100 строки
3.4 KiB
C
100 строки
3.4 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
|
|
/*
|
|
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
|
|
* University Research and Technology
|
|
* Corporation. All rights reserved.
|
|
* Copyright (c) 2004-2006 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 (c) 2015 Los Alamos National Security, LLC. All rights
|
|
* reserved.
|
|
* $COPYRIGHT$
|
|
*
|
|
* Additional copyrights may follow
|
|
*
|
|
* $HEADER$
|
|
*/
|
|
/**
|
|
* @file
|
|
*/
|
|
#ifndef MCA_PML_OB1_COMM_H
|
|
#define MCA_PML_OB1_COMM_H
|
|
|
|
#include "opal/threads/mutex.h"
|
|
#include "opal/class/opal_list.h"
|
|
#include "ompi/proc/proc.h"
|
|
#include "ompi/communicator/communicator.h"
|
|
BEGIN_C_DECLS
|
|
|
|
|
|
struct mca_pml_ob1_comm_proc_t {
|
|
opal_object_t super;
|
|
uint16_t expected_sequence; /**< send message sequence number - receiver side */
|
|
struct ompi_proc_t* ompi_proc;
|
|
#if OPAL_ENABLE_MULTI_THREADS
|
|
volatile int32_t send_sequence; /**< send side sequence number */
|
|
#else
|
|
int32_t send_sequence; /**< send side sequence number */
|
|
#endif
|
|
opal_list_t frags_cant_match; /**< out-of-order fragment queues */
|
|
opal_list_t specific_receives; /**< queues of unmatched specific receives */
|
|
opal_list_t unexpected_frags; /**< unexpected fragment queues */
|
|
};
|
|
typedef struct mca_pml_ob1_comm_proc_t mca_pml_ob1_comm_proc_t;
|
|
|
|
OBJ_CLASS_DECLARATION(mca_pml_ob1_comm_proc_t);
|
|
|
|
/**
|
|
* Cached on ompi_communicator_t to hold queues/state
|
|
* used by the PML<->PTL interface for matching logic.
|
|
*/
|
|
struct mca_pml_comm_t {
|
|
opal_object_t super;
|
|
volatile uint32_t recv_sequence; /**< recv request sequence number - receiver side */
|
|
opal_mutex_t matching_lock; /**< matching lock */
|
|
opal_list_t wild_receives; /**< queue of unmatched wild (source process not specified) receives */
|
|
opal_mutex_t proc_lock;
|
|
mca_pml_ob1_comm_proc_t **procs;
|
|
size_t num_procs;
|
|
size_t last_probed;
|
|
};
|
|
typedef struct mca_pml_comm_t mca_pml_ob1_comm_t;
|
|
|
|
OBJ_CLASS_DECLARATION(mca_pml_ob1_comm_t);
|
|
|
|
static inline mca_pml_ob1_comm_proc_t *mca_pml_ob1_peer_lookup (struct ompi_communicator_t *comm, int rank)
|
|
{
|
|
mca_pml_ob1_comm_t *pml_comm = (mca_pml_ob1_comm_t *)comm->c_pml_comm;
|
|
|
|
if (OPAL_UNLIKELY(NULL == pml_comm->procs[rank])) {
|
|
OPAL_THREAD_LOCK(&pml_comm->proc_lock);
|
|
if (NULL == pml_comm->procs[rank]) {
|
|
pml_comm->procs[rank] = OBJ_NEW(mca_pml_ob1_comm_proc_t);
|
|
pml_comm->procs[rank]->ompi_proc = ompi_comm_peer_lookup (comm, rank);
|
|
OBJ_RETAIN(pml_comm->procs[rank]->ompi_proc);
|
|
opal_atomic_wmb ();
|
|
}
|
|
OPAL_THREAD_UNLOCK(&pml_comm->proc_lock);
|
|
}
|
|
|
|
return pml_comm->procs[rank];
|
|
}
|
|
|
|
/**
|
|
* Initialize an instance of mca_pml_ob1_comm_t based on the communicator size.
|
|
*
|
|
* @param comm Instance of mca_pml_ob1_comm_t
|
|
* @param size Size of communicator
|
|
* @return OMPI_SUCCESS or error status on failure.
|
|
*/
|
|
|
|
extern int mca_pml_ob1_comm_init_size(mca_pml_ob1_comm_t* comm, size_t size);
|
|
|
|
END_C_DECLS
|
|
#endif
|
|
|