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lammps/lib/kokkos/example/multi_fem/TestBoxMeshPartition.cpp
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TestBoxMeshPartition.cpp
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//@HEADER
// ************************************************************************
//
// Kokkos v. 2.0
// Copyright (2014) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. 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.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "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 SANDIA CORPORATION OR THE
// CONTRIBUTORS 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.
//
// Questions? Contact H. Carter Edwards (hcedwar@sandia.gov)
//
// ************************************************************************
//@HEADER
#include <iostream>
#include <stdexcept>
#include <limits>
#include <utility>
#include <BoxMeshPartition.hpp>
//----------------------------------------------------------------------------
void test_box_partition( bool print )
{
const size_t np_max = 10000 ;
const BoxBoundsLinear use_box ;
BoxType root_box ;
root_box[0][0] = 0 ; root_box[0][1] = 100 ;
root_box[1][0] = 0 ; root_box[1][1] = 200 ;
root_box[2][0] = 0 ; root_box[2][1] = 300 ;
const size_t cell_total =
( root_box[0][1] - root_box[0][0] ) *
( root_box[1][1] - root_box[1][0] ) *
( root_box[2][1] - root_box[2][0] );
for ( size_t np = 2 ; np < np_max ; np = 2 * ( np + 1 ) ) {
std::vector<BoxType> part_boxes( np );
box_partition_rcb( root_box , part_boxes );
size_t cell_goal = ( cell_total + np - 1 ) / np ;
size_t cell_max = 0 ;
for ( size_t i = 0 ; i < np ; ++i ) {
cell_max = std::max( cell_max , count( part_boxes[i] ) );
}
if ( print ) {
std::cout << std::endl
<< "box_part( " << np
<< " ) max( " << cell_max
<< " ) goal( " << cell_goal
<< " ) ratio( " << double(cell_max) / double(cell_goal)
<< " )" << std::endl ;
}
const size_t nsample = std::min(np,(size_t)4);
const size_t stride = ( np + nsample - 1 ) / nsample ;
for ( size_t my_part = 0 ; my_part < np ; my_part += stride ) {
BoxType my_use_box ;
std::vector<size_t> my_use_id_map ;
size_t my_count_interior ;
size_t my_count_owned ;
size_t my_count_uses ;
std::vector<size_t> my_recv_counts ;
std::vector<std::vector<size_t> > my_send_map ;
size_t count_verify = 0 ;
box_partition_maps( root_box , part_boxes ,
use_box , my_part ,
my_use_box , my_use_id_map ,
my_count_interior ,
my_count_owned ,
my_count_uses ,
my_recv_counts ,
my_send_map );
count_verify = my_count_owned ;
if ( print ) {
std::cout << " my_part(" << my_part << ") layout { "
<< "P" << my_part
<< "(" << my_count_interior
<< "," << ( my_count_owned - my_count_interior )
<< ")" ;
}
for ( size_t i = 1 ; i < np ; ++i ) {
if ( my_recv_counts[i] ) {
count_verify += my_recv_counts[i] ;
const size_t ip = ( my_part + i ) % np ;
if ( print ) {
std::cout << " P" << ip << "(" << my_recv_counts[i] << ")" ;
}
// Compare recv & send lists
BoxType ip_use_box ;
std::vector<size_t> ip_use_id_map ;
size_t ip_count_interior ;
size_t ip_count_owned ;
size_t ip_count_uses ;
std::vector<size_t> ip_recv_counts ;
std::vector<std::vector<size_t> > ip_send_map ;
box_partition_maps( root_box , part_boxes ,
use_box , ip ,
ip_use_box , ip_use_id_map ,
ip_count_interior ,
ip_count_owned ,
ip_count_uses ,
ip_recv_counts ,
ip_send_map );
// Sent by ip, received by my_part:
const BoxType recv_send = intersect( part_boxes[ip] , my_use_box );
const size_t recv_send_count = count( recv_send );
const size_t j = ( my_part + np - ip ) % np ;
if ( recv_send_count != my_recv_counts[i] ||
recv_send_count != ip_send_map[j].size() ) {
throw std::runtime_error( std::string("bad recv/send map") );
}
}
}
if ( print ) { std::cout << " }" << std::endl ; }
if ( count_verify != my_count_uses ) {
throw std::runtime_error( std::string("bad partition map") );
}
}
}
}
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