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>
67 строки
2.6 KiB
C
67 строки
2.6 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 and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 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) 2007-2016 Los Alamos National Security, LLC. All rights
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* reserved.
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* Copyright (c) 2015 Research Organization for Information Science
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* and Technology (RIST). All rights reserved.
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* Copyright (c) 2019 Sandia National Laboratories. All rights reserved.
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*
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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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#ifndef OPAL_MCA_THREADS_QTHREADS_THREADS_QTHREADS_WAIT_SYNC_H
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#define OPAL_MCA_THREADS_QTHREADS_THREADS_QTHREADS_WAIT_SYNC_H 1
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#include "opal/mca/threads/qthreads/threads_qthreads.h"
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#include <abt.h>
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typedef struct ompi_wait_sync_t {
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opal_atomic_int32_t count;
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int32_t status;
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ABT_cond condition;
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ABT_mutex lock;
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struct ompi_wait_sync_t *next;
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struct ompi_wait_sync_t *prev;
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volatile bool signaling;
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} ompi_wait_sync_t;
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#define SYNC_WAIT(sync) (opal_using_threads() ? ompi_sync_wait_mt (sync) : sync_wait_st (sync))
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/* The loop in release handles a race condition between the signaling
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* thread and the destruction of the condition variable. The signaling
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* member will be set to false after the final signaling thread has
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* finished operating on the sync object. This is done to avoid
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* extra atomics in the signalling function and keep it as fast
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* as possible. Note that the race window is small so spinning here
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* is more optimal than sleeping since this macro is called in
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* the critical path. */
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#define WAIT_SYNC_RELEASE(sync) do { } while (0)
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#define WAIT_SYNC_RELEASE_NOWAIT(sync) do { } while (0)
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#define WAIT_SYNC_SIGNAL(sync) do { } while (0)
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#define WAIT_SYNC_SIGNALLED(sync) do { } while (0)
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OPAL_DECLSPEC int ompi_sync_wait_mt(ompi_wait_sync_t *sync);
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static inline int sync_wait_st (ompi_wait_sync_t *sync)
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{
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return sync->status;
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}
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#define WAIT_SYNC_INIT(sync,c) do { } while (0)
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#endif /* OPAL_MCA_THREADS_QTHREADS_THREADS_QTHREADS_WAIT_SYNC_H */
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