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openmpi/ompi/tools/mpisync/mpigclock.h

57 строки
2.3 KiB
C

/*
* Copyright (c) 2010-2011, Siberian State University of Telecommunications
* and Information Sciences. All rights reserved.
* Copyright (c) 2010-2011, A.V. Rzhanov Institute of Semiconductor Physics SB RAS.
* All rights reserved.
*
* mpigclock.h: MPI clock synchronization.
* http://mpiperf.cpct.sibsutis.ru/index.php
*
* Copyright (C) 2011 Mikhail Kurnosov <mkurnosov@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of the the copyright holders nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#ifndef MPIGCLOCK_H
#define MPIGCLOCK_H
#include <stdio.h>
#include "hpctimer.h"
#define INVALIDTIME -1.0
#define MPIGCLOCK_RTTMIN_NOTCHANGED_MAX 100
#define MPIGCLOCK_MSGTAG 128
/* mpigclock_measure_offset_adaptive: Measures clock's offset of peer. */
double mpigclock_sync_linear(MPI_Comm comm, int root, double *rtt);
#endif