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TestScan.hpp
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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::View< int, Device, Kokkos::MemoryTraits<Kokkos::Atomic> > errors;
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 ) {
errors()++;
if ( errors() < 20 ) {
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 )
{
Kokkos::View< int, Device > errors_a( "Errors" );
Kokkos::deep_copy( errors_a, 0 );
errors = errors_a;
parallel_scan( N , *this );
}
TestScan( const WorkSpec & Start , const WorkSpec & N )
{
typedef Kokkos::RangePolicy< execution_space > exec_policy ;
Kokkos::View< int, Device > errors_a( "Errors" );
Kokkos::deep_copy( errors_a, 0 );
errors = errors_a;
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 );
}
}
};
} // namespace Test

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