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Kokkos_Serial_Task.cpp
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Thu, Jun 6, 07:06

Kokkos_Serial_Task.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 <Kokkos_Macros.hpp>
#if defined( KOKKOS_ENABLE_SERIAL ) && defined( KOKKOS_ENABLE_TASKDAG )
#include <Kokkos_Core.hpp>
#include <impl/Kokkos_Serial_Task.hpp>
#include <impl/Kokkos_TaskQueue_impl.hpp>
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
namespace Kokkos {
namespace Impl {
template class TaskQueue< Kokkos::Serial > ;
void TaskQueueSpecialization< Kokkos::Serial >::execute
( TaskQueue< Kokkos::Serial > * const queue )
{
using execution_space = Kokkos::Serial ;
using queue_type = TaskQueue< execution_space > ;
using task_root_type = TaskBase< void , void , void > ;
using Member = Impl::HostThreadTeamMember< execution_space > ;
task_root_type * const end = (task_root_type *) task_root_type::EndTag ;
// Set default buffers
serial_resize_thread_team_data( 0 /* global reduce buffer */
, 512 /* team reduce buffer */
, 0 /* team shared buffer */
, 0 /* thread local buffer */
);
Impl::HostThreadTeamData * const data = Impl::serial_get_thread_team_data();
Member exec( *data );
// Loop until all queues are empty
while ( 0 < queue->m_ready_count ) {
task_root_type * task = end ;
for ( int i = 0 ; i < queue_type::NumQueue && end == task ; ++i ) {
for ( int j = 0 ; j < 2 && end == task ; ++j ) {
task = queue_type::pop_ready_task( & queue->m_ready[i][j] );
}
}
if ( end != task ) {
// pop_ready_task resulted in lock == task->m_next
// In the executing state
(*task->m_apply)( task , & exec );
#if 0
printf( "TaskQueue<Serial>::executed: 0x%lx { 0x%lx 0x%lx %d %d %d }\n"
, uintptr_t(task)
, uintptr_t(task->m_wait)
, uintptr_t(task->m_next)
, task->m_task_type
, task->m_priority
, task->m_ref_count );
#endif
// If a respawn then re-enqueue otherwise the task is complete
// and all tasks waiting on this task are updated.
queue->complete( task );
}
else if ( 0 != queue->m_ready_count ) {
Kokkos::abort("TaskQueue<Serial>::execute ERROR: ready_count");
}
}
}
void TaskQueueSpecialization< Kokkos::Serial > ::
iff_single_thread_recursive_execute(
TaskQueue< Kokkos::Serial > * const queue )
{
using execution_space = Kokkos::Serial ;
using queue_type = TaskQueue< execution_space > ;
using task_root_type = TaskBase< void , void , void > ;
using Member = Impl::HostThreadTeamMember< execution_space > ;
task_root_type * const end = (task_root_type *) task_root_type::EndTag ;
Impl::HostThreadTeamData * const data = Impl::serial_get_thread_team_data();
Member exec( *data );
// Loop until no runnable task
task_root_type * task = end ;
do {
task = end ;
for ( int i = 0 ; i < queue_type::NumQueue && end == task ; ++i ) {
for ( int j = 0 ; j < 2 && end == task ; ++j ) {
task = queue_type::pop_ready_task( & queue->m_ready[i][j] );
}
}
if ( end == task ) break ;
(*task->m_apply)( task , & exec );
queue->complete( task );
} while(1);
}
}} /* namespace Kokkos::Impl */
#else
void KOKKOS_CORE_SRC_IMPL_SERIAL_TASK_PREVENT_LINK_ERROR() {}
#endif /* #if defined( KOKKOS_ENABLE_SERIAL ) && defined( KOKKOS_ENABLE_TASKDAG ) */

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