ee3517427e
Add a framework to support different types of threading models including user space thread packages such as Qthreads and argobot: https://github.com/pmodels/argobots https://github.com/Qthreads/qthreads The default threading model is pthreads. Alternate thread models are specificed at configure time using the --with-threads=X option. The framework is static. The theading model to use is selected at Open MPI configure/build time. mca/threads: implement Argobots threading layer config: fix thread configury - Add double quotations - Change Argobot to Argobots config: implement Argobots check If the poll time is too long, MPI hangs. This quick fix just sets it to 0, but it is not good for the Pthreads version. Need to find a good way to abstract it. Note that even 1 (= 1 millisecond) causes disastrous performance degradation. rework threads MCA framework configury It now works more like the ompi/mca/rte configury, modulo some edge items that are special for threading package linking, etc. qthreads module some argobots cleanup Signed-off-by: Noah Evans <noah.evans@gmail.com> Signed-off-by: Shintaro Iwasaki <siwasaki@anl.gov> Signed-off-by: Howard Pritchard <howardp@lanl.gov>
106 строки
2.8 KiB
C
106 строки
2.8 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; -*- */
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/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2008 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* 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) 2010 Cisco Systems, 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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/** @file
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*
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*/
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#ifndef OPAL_RING_BUFFER_H
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#define OPAL_RING_BUFFER_H
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#include "opal_config.h"
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#include "opal/mca/threads/threads.h"
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#include "opal/class/opal_object.h"
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#include "opal/util/output.h"
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BEGIN_C_DECLS
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/**
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* dynamic pointer ring
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*/
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struct opal_ring_buffer_t {
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/** base class */
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opal_object_t super;
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/** synchronization object */
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opal_mutex_t lock;
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opal_condition_t cond;
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bool in_use;
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/* head/tail indices */
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int head;
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int tail;
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/** size of list, i.e. number of elements in addr */
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int size;
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/** pointer to ring */
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char **addr;
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};
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/**
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* Convenience typedef
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*/
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typedef struct opal_ring_buffer_t opal_ring_buffer_t;
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/**
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* Class declaration
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*/
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OPAL_DECLSPEC OBJ_CLASS_DECLARATION(opal_ring_buffer_t);
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/**
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* Initialize the ring buffer, defining its size.
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*
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* @param ring Pointer to a ring buffer (IN/OUT)
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* @param size The number of elements in the ring (IN)
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*
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* @return OPAL_SUCCESS if all initializations were succesful. Otherwise,
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* the error indicate what went wrong in the function.
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*/
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OPAL_DECLSPEC int opal_ring_buffer_init(opal_ring_buffer_t* ring, int size);
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/**
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* Push an item onto the ring buffer
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*
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* @param ring Pointer to ring (IN)
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* @param ptr Pointer value (IN)
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*
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* @return OPAL_SUCCESS. Returns error if ring cannot take
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* another entry
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*/
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OPAL_DECLSPEC void* opal_ring_buffer_push(opal_ring_buffer_t *ring, void *ptr);
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/**
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* Pop an item off of the ring. The oldest entry on the ring will be
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* returned. If nothing on the ring, NULL is returned.
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*
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* @param ring Pointer to ring (IN)
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*
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* @return Error code. NULL indicates an error.
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*/
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OPAL_DECLSPEC void* opal_ring_buffer_pop(opal_ring_buffer_t *ring);
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/*
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* Access an element of the ring, without removing it, indexed
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* starting at the tail - a value of -1 will return the element
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* at the head of the ring
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*/
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OPAL_DECLSPEC void* opal_ring_buffer_poke(opal_ring_buffer_t *ring, int i);
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END_C_DECLS
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#endif /* OPAL_RING_BUFFER_H */
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