root/ompi/tools/mpisync/mpigclock.h

INCLUDED FROM

   1 /*
   2  * Copyright (c) 2010-2011, Siberian State University of Telecommunications
   3  *                          and Information Sciences. All rights reserved.
   4  * Copyright (c) 2010-2011, A.V. Rzhanov Institute of Semiconductor Physics SB RAS.
   5  *                          All rights reserved.
   6  *
   7  * mpigclock.h: MPI clock synchronization.
   8  * http://mpiperf.cpct.sibsutis.ru/index.php
   9  *
  10  * Copyright (C) 2011 Mikhail Kurnosov <mkurnosov@gmail.com>
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions are met:
  14  * Redistributions of source code must retain the above copyright
  15  * notice, this list of conditions and the following disclaimer.
  16  *
  17  * Redistributions in binary form must reproduce the above copyright
  18  * notice, this list of conditions and the following disclaimer in the
  19  * documentation and/or other materials provided with the distribution.
  20  *
  21  * Neither the name of the the copyright holders nor the
  22  * names of its contributors may be used to endorse or promote products
  23  * derived from this software without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  27  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
  29  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  30  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  31  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  32  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  34  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  * $COPYRIGHT$
  37  *
  38  * Additional copyrights may follow
  39  *
  40  * $HEADER$
  41  */
  42 
  43 #ifndef MPIGCLOCK_H
  44 #define MPIGCLOCK_H
  45 
  46 #include <stdio.h>
  47 #include "hpctimer.h"
  48 
  49 #define INVALIDTIME -1.0
  50 #define MPIGCLOCK_RTTMIN_NOTCHANGED_MAX 100
  51 #define MPIGCLOCK_MSGTAG 128
  52 
  53 /* mpigclock_measure_offset_adaptive: Measures clock's offset of peer. */
  54 double mpigclock_sync_linear(MPI_Comm comm, int root, double *rtt);
  55 double mpigclock_sync_log(MPI_Comm comm, int root, double *rtt);
  56 
  57 #endif