d8df9d414d
This commit adds support for performing one-sided operations over supported hardware (currently Infiniband and Cray Gemini/Aries). This component is still undergoing active development. Current features: - Use network atomic operations (fadd, cswap) for implementing locking and PSCW synchronization. - Aggregate small contiguous puts. - Reduced memory footprint by storing window data (pointer, keys, etc) at the lowest rank on each node. The data is fetched as each process needs to communicate with a new peer. This is a trade-off between the performance of the first operation on a peer and the memory utilization of a window. TODO: - Add support for the accumulate_ops info key. If it is known that the same op or same op/no op is used it may be possible to use hardware atomics for fetch-and-op and compare-and-swap. Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
43 строки
1.6 KiB
C
43 строки
1.6 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.
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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) 2007-2014 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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* $COPYRIGHT$
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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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#if !defined(OSC_RDMA_ACTIVE_TARGET_H)
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#define OSC_RDMA_ACTIVE_TARGET_H
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#include "osc_rdma.h"
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#include "osc_rdma_sync.h"
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#include "osc_rdma_lock.h"
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int ompi_osc_rdma_fence_atomic (int assert, struct ompi_win_t *win);
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int ompi_osc_rdma_start_atomic (struct ompi_group_t *group,
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int assert, struct ompi_win_t *win);
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int ompi_osc_rdma_complete_atomic (struct ompi_win_t *win);
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int ompi_osc_rdma_post_atomic (struct ompi_group_t *group,
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int assert, struct ompi_win_t *win);
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int ompi_osc_rdma_wait_atomic (struct ompi_win_t *win);
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int ompi_osc_rdma_test_atomic (struct ompi_win_t *win, int *flag);
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#endif /* OSC_RDMA_ACTIVE_TARGET_H */
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