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TestScan.hpp
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Thu, Aug 15, 11:18

TestScan.hpp
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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 <stdio.h>
namespace Test {
template< class Device , class WorkSpec = size_t >
struct TestScan {
typedef Device execution_space ;
typedef long int value_type ;
KOKKOS_INLINE_FUNCTION
void operator()( const int iwork , value_type & update , const bool final_pass ) const
{
const value_type n = iwork + 1 ;
const value_type imbalance = ( (1000 <= n) && (0 == n % 1000) ) ? 1000 : 0 ;
// Insert an artificial load imbalance
for ( value_type i = 0 ; i < imbalance ; ++i ) { ++update ; }
update += n - imbalance ;
if ( final_pass ) {
const value_type answer = n & 1 ? ( n * ( ( n + 1 ) / 2 ) ) : ( ( n / 2 ) * ( n + 1 ) );
if ( answer != update ) {
printf("TestScan(%d,%ld) != %ld\n",iwork,update,answer);
}
}
}
KOKKOS_INLINE_FUNCTION
void init( value_type & update ) const { update = 0 ; }
KOKKOS_INLINE_FUNCTION
void join( volatile value_type & update ,
volatile const value_type & input ) const
{ update += input ; }
TestScan( const WorkSpec & N )
{ parallel_scan( N , *this ); }
TestScan( const WorkSpec & Start , const WorkSpec & N )
{
typedef Kokkos::RangePolicy<execution_space> exec_policy ;
parallel_scan( exec_policy( Start , N ) , *this );
}
static void test_range( const WorkSpec & begin , const WorkSpec & end )
{
for ( WorkSpec i = begin ; i < end ; ++i ) {
(void) TestScan( i );
}
}
};
}

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