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AMReX_MultiFabUtil.H
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AMReX_MultiFabUtil.H
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#ifndef AMREX_MultiFabUtil_H_
#define AMREX_MultiFabUtil_H_
#include <AMReX_Config.H>
#include <AMReX_MultiFab.H>
#include <AMReX_iMultiFab.H>
#include <AMReX_LayoutData.H>
#include <AMReX_MFIter.H>
#include <AMReX_Array.H>
#include <AMReX_Vector.H>
#include <AMReX_MultiFabUtil_C.H>
#include <AMReX_MultiFabUtilI.H>
namespace amrex
{
//! Average nodal-based MultiFab onto cell-centered MultiFab.
void average_node_to_cellcenter (MultiFab& cc, int dcomp,
const MultiFab& nd, int scomp,
int ncomp, int ngrow = 0);
/**
* \brief Average edge-based MultiFab onto cell-centered MultiFab.
*
* This fills in \p ngrow ghost cells in the cell-centered MultiFab. Both cell centered and
* edge centered MultiFabs need to have \p ngrow ghost values.
*/
void average_edge_to_cellcenter (MultiFab& cc, int dcomp,
const Vector<const MultiFab*>& edge,
int ngrow = 0);
//! Average face-based MultiFab onto cell-centered MultiFab.
void average_face_to_cellcenter (MultiFab& cc, int dcomp,
const Vector<const MultiFab*>& fc,
int ngrow = 0);
//! Average face-based FabArray onto cell-centered FabArray.
template <typename CMF, typename FMF,
std::enable_if_t<IsFabArray_v<CMF> && IsFabArray_v<FMF>, int> = 0>
void average_face_to_cellcenter (CMF& cc, int dcomp,
const Array<const FMF*,AMREX_SPACEDIM>& fc,
int ngrow = 0);
//! Average face-based MultiFab onto cell-centered MultiFab with geometric weighting.
void average_face_to_cellcenter (MultiFab& cc,
const Vector<const MultiFab*>& fc,
const Geometry& geom);
//! Average face-based MultiFab onto cell-centered MultiFab with geometric weighting.
void average_face_to_cellcenter (MultiFab& cc,
const Array<const MultiFab*,AMREX_SPACEDIM>& fc,
const Geometry& geom);
//! Average cell-centered MultiFab onto face-based MultiFab with geometric weighting.
void average_cellcenter_to_face (const Vector<MultiFab*>& fc,
const MultiFab& cc,
const Geometry& geom,
int ncomp = 1,
bool use_harmonic_averaging = false);
//! Average cell-centered MultiFab onto face-based MultiFab with geometric weighting.
void average_cellcenter_to_face (const Array<MultiFab*,AMREX_SPACEDIM>& fc,
const MultiFab& cc,
const Geometry& geom,
int ncomp = 1,
bool use_harmonic_averaging = false);
//! Average fine face-based FabArray onto crse face-based FabArray.
template <typename MF, std::enable_if_t<IsFabArray<MF>::value,int> = 0>
void average_down_faces (const Vector<const MF*>& fine,
const Vector<MF*>& crse,
const IntVect& ratio,
int ngcrse = 0);
//! Average fine face-based FabArray onto crse face-based FabArray.
template <typename MF, std::enable_if_t<IsFabArray<MF>::value,int> = 0>
void average_down_faces (const Vector<const MF*>& fine,
const Vector<MF*>& crse,
int ratio,
int ngcrse = 0);
//! Average fine face-based FabArray onto crse face-based FabArray.
template <typename MF, std::enable_if_t<IsFabArray<MF>::value,int> = 0>
void average_down_faces (const Array<const MF*,AMREX_SPACEDIM>& fine,
const Array<MF*,AMREX_SPACEDIM>& crse,
const IntVect& ratio,
int ngcrse = 0);
//! Average fine face-based FabArray onto crse face-based FabArray.
template <typename MF, std::enable_if_t<IsFabArray<MF>::value,int> = 0>
void average_down_faces (const Array<const MF*,AMREX_SPACEDIM>& fine,
const Array<MF*,AMREX_SPACEDIM>& crse,
int ratio,
int ngcrse = 0);
/**
* \brief This version does average down for one face direction.
*
* It uses the IndexType of MultiFabs to determine the direction.
* It is expected that one direction is nodal and the rest are cell-centered.
*/
template <typename FAB>
void average_down_faces (const FabArray<FAB>& fine, FabArray<FAB>& crse,
const IntVect& ratio, int ngcrse=0);
// This version takes periodicity into account.
template <typename MF, std::enable_if_t<IsFabArray<MF>::value,int> = 0>
void average_down_faces (const Array<const MF*,AMREX_SPACEDIM>& fine,
const Array<MF*,AMREX_SPACEDIM>& crse,
const IntVect& ratio, const Geometry& crse_geom);
// This version takes periodicity into account.
template <typename FAB>
void average_down_faces (const FabArray<FAB>& fine, FabArray<FAB>& crse,
const IntVect& ratio, const Geometry& crse_geom);
//! Average fine edge-based MultiFab onto crse edge-based MultiFab.
void average_down_edges (const Vector<const MultiFab*>& fine,
const Vector<MultiFab*>& crse,
const IntVect& ratio,
int ngcrse = 0);
void average_down_edges (const Array<const MultiFab*,AMREX_SPACEDIM>& fine,
const Array<MultiFab*,AMREX_SPACEDIM>& crse,
const IntVect& ratio,
int ngcrse = 0);
//! This version does average down for one direction.
//! It uses the IndexType of MultiFabs to determine the direction.
//! It is expected that one direction is cell-centered and the rest are nodal.
void average_down_edges (const MultiFab& fine, MultiFab& crse,
const IntVect& ratio, int ngcrse=0);
//! Average fine node-based MultiFab onto crse node-centered MultiFab.
template <typename FAB>
void average_down_nodal (const FabArray<FAB>& S_fine,
FabArray<FAB>& S_crse,
const IntVect& ratio,
int ngcrse = 0,
bool mfiter_is_definitely_safe=false);
/**
* \brief Volume weighed average of fine MultiFab onto coarse MultiFab.
*
* Both MultiFabs are assumed to be cell-centered. This routine DOES NOT assume that
* the crse BoxArray is a coarsened version of the fine BoxArray.
*/
void average_down (const MultiFab& S_fine, MultiFab& S_crse,
const Geometry& fgeom, const Geometry& cgeom,
int scomp, int ncomp, const IntVect& ratio);
void average_down (const MultiFab& S_fine, MultiFab& S_crse,
const Geometry& fgeom, const Geometry& cgeom,
int scomp, int ncomp, int rr);
//! Average MultiFab onto crse MultiFab without volume weighting. This
//! routine DOES NOT assume that the crse BoxArray is a coarsened version of
//! the fine BoxArray. Work for both cell-centered and nodal MultiFabs.
template<typename FAB>
void average_down (const FabArray<FAB>& S_fine, FabArray<FAB>& S_crse,
int scomp, int ncomp, const IntVect& ratio);
template<typename FAB>
void average_down (const FabArray<FAB>& S_fine, FabArray<FAB>& S_crse,
int scomp, int ncomp, int rr);
//! Add a coarsened version of the data contained in the S_fine MultiFab to
//! S_crse, including ghost cells.
void sum_fine_to_coarse (const MultiFab& S_Fine, MultiFab& S_crse,
int scomp, int ncomp,
const IntVect& ratio,
const Geometry& cgeom, const Geometry& fgeom);
//! Output state data for a single zone
void print_state (const MultiFab& mf, const IntVect& cell, int n=-1,
const IntVect& ng = IntVect::TheZeroVector());
//! Write each fab individually
void writeFabs (const MultiFab& mf, const std::string& name);
void writeFabs (const MultiFab& mf, int comp, int ncomp, const std::string& name);
//! Extract a slice from the given cell-centered MultiFab at coordinate
//! "coord" along direction "dir".
std::unique_ptr<MultiFab> get_slice_data(int dir, Real coord,
const MultiFab& cc,
const Geometry& geom, int start_comp, int ncomp,
bool interpolate=false);
/**
* \brief Get data in a cell of MultiFab/FabArray
*
* This returns a Vector containing the data in a given cell, if it's
* available on a process. The returned Vector is empty if a process
* does not have the given cell.
*/
template <typename MF, std::enable_if_t<IsFabArray<MF>::value,int> FOO = 0>
Vector<typename MF::value_type> get_cell_data (MF const& mf, IntVect const& cell);
/**
* \brief Get data in a line of MultiFab/FabArray
*
* This returns a MultiFab/FabArray containing the data in a line
* specified by a direction and a cell.
*/
template <typename MF, std::enable_if_t<IsFabArray<MF>::value,int> FOO = 0>
MF get_line_data (MF const& mf, int dir, IntVect const& cell);
//! Return an iMultiFab that has the same BoxArray and DistributionMapping
//! as the coarse MultiFab cmf. Cells covered by the coarsened fine grids
//! are set to fine_value, whereas other cells are set to crse_value.
template <typename FAB>
iMultiFab makeFineMask (const FabArray<FAB>& cmf, const BoxArray& fba, const IntVect& ratio,
int crse_value = 0, int fine_value = 1);
iMultiFab makeFineMask (const BoxArray& cba, const DistributionMapping& cdm,
const BoxArray& fba, const IntVect& ratio,
int crse_value = 0, int fine_value = 1);
template <typename FAB>
iMultiFab makeFineMask (const FabArray<FAB>& cmf, const BoxArray& fba, const IntVect& ratio,
Periodicity const& period, int crse_value, int fine_value);
iMultiFab makeFineMask (const BoxArray& cba, const DistributionMapping& cdm,
const IntVect& cnghost, const BoxArray& fba, const IntVect& ratio,
Periodicity const& period, int crse_value, int fine_value);
template <typename FAB>
iMultiFab makeFineMask (const FabArray<FAB>& cmf, const FabArray<FAB>& fmf,
const IntVect& cnghost, const IntVect& ratio,
Periodicity const& period, int crse_value, int fine_value);
template <typename FAB>
iMultiFab makeFineMask (const FabArray<FAB>& cmf, const FabArray<FAB>& fmf,
const IntVect& cnghost, const IntVect& ratio,
Periodicity const& period, int crse_value, int fine_value,
LayoutData<int>& has_cf);
MultiFab makeFineMask (const BoxArray& cba, const DistributionMapping& cdm,
const BoxArray& fba, const IntVect& ratio,
Real crse_value, Real fine_value);
//! Computes divergence of face-data stored in the umac MultiFab.
void computeDivergence (MultiFab& divu, const Array<MultiFab const*,AMREX_SPACEDIM>& umac,
const Geometry& geom);
//! Computes gradient of face-data stored in the umac MultiFab.
void computeGradient (MultiFab& grad, const Array<MultiFab const*,AMREX_SPACEDIM>& umac,
const Geometry& geom);
//! Convert iMultiFab to MultiFab
MultiFab ToMultiFab (const iMultiFab& imf);
//! Convert iMultiFab to Long
FabArray<BaseFab<Long> > ToLongMultiFab (const iMultiFab& imf);
//! Periodic shift MultiFab
MultiFab periodicShift (MultiFab const& mf, IntVect const& offset,
Periodicity const& period);
//! example: auto mf = amrex::cast<MultiFab>(imf);
template <typename T, typename U>
T cast (U const& mf_in)
{
T mf_out(mf_in.boxArray(), mf_in.DistributionMap(), mf_in.nComp(), mf_in.nGrowVect());
#ifdef AMREX_USE_OMP
#pragma omp parallel if (Gpu::notInLaunchRegion())
#endif
for (MFIter mfi(mf_in); mfi.isValid(); ++mfi)
{
const Long n = mfi.fabbox().numPts() * mf_in.nComp();
auto * pdst = mf_out[mfi].dataPtr();
auto const* psrc = mf_in [mfi].dataPtr();
AMREX_HOST_DEVICE_PARALLEL_FOR_1D ( n, i,
{
pdst[i] = static_cast<typename U::value_type>(psrc[i]); // NOLINT(bugprone-signed-char-misuse)
});
}
return mf_out;
}
/**
* \brief Reduce FabArray/MultiFab data to a plane.
*
* This function takes a FabArray/MultiFab and reduces its data to a
* plane. The return data are stored in a BaseFab with only one cell in
* the normal direction of the plane. The index range of the BaseFab in
* the other directions is the same as the provided domain Box. If data
* do not exist along a certain line, the value is set to the minimum,
* maximum and zero, for reduce max, min and sum, respectively. The
* reduction is local and the user may need to do MPI communication
* afterwards if needed.
*
* In the example code below, the sum along each line at (i,j) in the
* z-direction is computed and stored at (i,j,0) of the returned
* BaseFab.
\verbatim
int dir = 2; // z-direction
auto const& domain_box = geom.Domain();
auto const& ma = mf.const_arrays();
auto rr = ReduceToPlane<ReduceOpSum,Real>(dir, domain_box, mf,
[=] AMREX_GPU_DEVICE (int box_no, int i, int j, int k) -> Real
{
return ma[box_no](i,j,k); // data at (i,j,k) of Box box_no
});
\endverbatim
*
* Below is another example. This finds the maximum value in the
* x-direction and stores the maximum value and the i-index. An MPI
* reduce is then called to further reduce the data to the root process
* 0.
\verbatim
int dir = 0; // x-direction
auto const& domain_box = geom.Domain().surroundingNodes(); // nodal data
auto const& ma = mf.const_arrays();
auto rr = ReduceToPlane<ReduceOpMax,KeyValuePair<Real,int>>
(dir, domain_box, mf,
[=] AMREX_GPU_DEVICE (int box_no, int i, int j, int k)
-> KeyValuePair<Real,int>
{
return {ma[box_no](i,j,k), i};
});
ParallelReduce::Max(rr.dataPtr(), rr.size(), root,
ParallelDescriptor::Communicator());
// Process root now has the final results.
\endverbatim
*
* \tparam Op reduce operator (e.g., ReduceOpSum, ReduceOpMin and ReduceOpMax)
* \tparam T data type of reduction result
* \tparam FAB FabArray/MultiFab type
* \tparam F callable type like a lambda function
*
* \param direction normal direction of the plane (e.g., 0, 1 and 2)
* \param domain domain Box
* \param mf a FabArray/MultiFab object specifying the iteration space
* \param f a callable object returning T. It takes four ints,
* where the first int is the local box index and the others
* are spatial indices for x, y, and z-directions.
*
* \return reduction result (BaseFab<T>)
*/
template <typename Op, typename T, typename FAB, typename F,
std::enable_if_t<IsBaseFab<FAB>::value
#ifndef AMREX_USE_CUDA
&& IsCallableR<T,F,int,int,int,int>::value
#endif
, int> FOO = 0>
BaseFab<T>
ReduceToPlane (int direction, Box const& domain, FabArray<FAB> const& mf, F const& f);
/**
* \brief Sum MultiFab data to line
*
* Return a HostVector that contains the sum of the given MultiFab data in the plane
* with the given normal direction. The size of the vector is
* domain.length(direction) x ncomp. The vector is actually a 2D array, where the
* element for component icomp at spatial index k is at [icomp*ncomp+k].
*
* \param mf MultiFab data for summing
* \param icomp starting component
* \param ncomp number of components
* \param domain the domain
* \param direction the direction of the line
* \param local If false, reduce across MPI processes.
*/
Gpu::HostVector<Real> sumToLine (MultiFab const& mf, int icomp, int ncomp,
Box const& domain, int direction, bool local = false);
/** \brief Volume weighted sum for a vector of MultiFabs
*
* Return a volume weighted sum of MultiFabs of AMR data. The sum is
* perform on a single component of the data. If the MultiFabs are
* built with EB Factories, the cut cell volume fraction will be
* included in the weight.
*/
Real volumeWeightedSum (Vector<MultiFab const*> const& mf, int icomp,
Vector<Geometry> const& geom,
Vector<IntVect> const& ratio,
bool local = false);
/**
* \brief Fourth-order interpolation from fine to coarse level.
*
* This is for high-order "average-down" of finite-difference data. If
* ghost cell data are used, it's the caller's responsibility to fill
* the ghost cells before calling this function.
*
* \param cmf coarse data
* \param scomp starting component
* \param ncomp number of component
* \param fmf fine data
* \param ratio refinement ratio.
*/
void FourthOrderInterpFromFineToCoarse (MultiFab& cmf, int scomp, int ncomp,
MultiFab const& fmf,
IntVect const& ratio);
/**
* \brief Fill MultiFab with random numbers from uniform distribution
*
* The uniform distribution range is [0.0, 1.0) for CPU and SYCL, it's
* (0,1] for CUDA and HIP. All cells including ghost cells are filled.
*
* \param mf MultiFab
* \param scomp starting component
* \param ncomp number of component
*/
void FillRandom (MultiFab& mf, int scomp, int ncomp);
/**
* \brief Fill MultiFab with random numbers from normal distribution
*
* All cells including ghost cells are filled.
*
* \param mf MultiFab
* \param scomp starting component
* \param ncomp number of component
* \param mean mean of normal distribution
* \param stddev standard deviation of normal distribution
*/
void FillRandomNormal (MultiFab& mf, int scomp, int ncomp, Real mean, Real stddev);
/**
* \brief Convexify AMR data
*
* This function "convexifies" the AMR data by removing cells that are
* covered by fine levels from coarse level MultiFabs. This could be
* useful for visualization. The returned MultiFabs on coarse levels
* have different BoxArrays from the original BoxArrays. For the finest
* level, the data is simply copied to the returned object. The returned
* MultiFabs have no ghost cells. For nodal data, the nodes on the
* coarse/fine interface exist on both levels.
*/
[[nodiscard]] Vector<MultiFab> convexify (Vector<MultiFab const*> const& mf,
Vector<IntVect> const& refinement_ratio);
}
namespace amrex {
template <typename FAB>
iMultiFab
makeFineMask (const FabArray<FAB>& cmf, const BoxArray& fba, const IntVect& ratio,
int crse_value, int fine_value)
{
return makeFineMask(cmf.boxArray(), cmf.DistributionMap(), cmf.nGrowVect(),
fba, ratio, Periodicity::NonPeriodic(), crse_value, fine_value);
}
template <typename FAB>
iMultiFab
makeFineMask (const FabArray<FAB>& cmf, const BoxArray& fba, const IntVect& ratio,
Periodicity const& period, int crse_value, int fine_value)
{
return makeFineMask(cmf.boxArray(), cmf.DistributionMap(), cmf.nGrowVect(),
fba, ratio, period, crse_value, fine_value);
}
template <typename FAB>
iMultiFab
makeFineMask (const FabArray<FAB>& cmf, const FabArray<FAB>& fmf,
const IntVect& cnghost, const IntVect& ratio,
Periodicity const& period, int crse_value, int fine_value)
{
iMultiFab mask(cmf.boxArray(), cmf.DistributionMap(), 1, cnghost);
mask.setVal(crse_value);
iMultiFab foo(amrex::coarsen(fmf.boxArray(),ratio), fmf.DistributionMap(),
1, 0, MFInfo().SetAlloc(false));
const FabArrayBase::CPC& cpc = mask.getCPC(cnghost,foo,IntVect::TheZeroVector(),period);
mask.setVal(fine_value, cpc, 0, 1);
return mask;
}
template <typename FAB>
iMultiFab
makeFineMask (const FabArray<FAB>& cmf, const FabArray<FAB>& fmf,
const IntVect& cnghost, const IntVect& ratio,
Periodicity const& period, int crse_value, int fine_value,
LayoutData<int>& has_cf)
{
iMultiFab mask(cmf.boxArray(), cmf.DistributionMap(), 1, cnghost);
mask.setVal(crse_value);
iMultiFab foo(amrex::coarsen(fmf.boxArray(),ratio), fmf.DistributionMap(),
1, 0, MFInfo().SetAlloc(false));
const FabArrayBase::CPC& cpc = mask.getCPC(cnghost,foo,IntVect::TheZeroVector(),period);
mask.setVal(fine_value, cpc, 0, 1);
has_cf = mask.RecvLayoutMask(cpc);
return mask;
}
//! Average fine node-based MultiFab onto crse node-based MultiFab.
//! This routine assumes that the crse BoxArray is a coarsened version of the fine BoxArray.
template <typename FAB>
void average_down_nodal (const FabArray<FAB>& fine, FabArray<FAB>& crse,
const IntVect& ratio, int ngcrse, bool mfiter_is_definitely_safe)
{
AMREX_ASSERT(fine.is_nodal());
AMREX_ASSERT(crse.is_nodal());
AMREX_ASSERT(crse.nComp() == fine.nComp());
int ncomp = crse.nComp();
using value_type = typename FAB::value_type;
if (mfiter_is_definitely_safe || isMFIterSafe(fine, crse))
{
#ifdef AMREX_USE_OMP
#pragma omp parallel if (Gpu::notInLaunchRegion())
#endif
for (MFIter mfi(crse,TilingIfNotGPU()); mfi.isValid(); ++mfi)
{
const Box& bx = mfi.growntilebox(ngcrse);
Array4<value_type> const& crsearr = crse.array(mfi);
Array4<value_type const> const& finearr = fine.const_array(mfi);
AMREX_LAUNCH_HOST_DEVICE_LAMBDA ( bx, tbx,
{
amrex_avgdown_nodes(tbx,crsearr,finearr,0,0,ncomp,ratio);
});
}
}
else
{
FabArray<FAB> ctmp(amrex::coarsen(fine.boxArray(),ratio), fine.DistributionMap(),
ncomp, ngcrse);
average_down_nodal(fine, ctmp, ratio, ngcrse);
crse.ParallelCopy(ctmp,0,0,ncomp,ngcrse,ngcrse);
}
}
// *************************************************************************************************************
// Average fine cell-based MultiFab onto crse cell-centered MultiFab.
// We do NOT assume that the coarse layout is a coarsened version of the fine layout.
// This version does NOT use volume-weighting
template<typename FAB>
void average_down (const FabArray<FAB>& S_fine, FabArray<FAB>& S_crse, int scomp, int ncomp, int rr)
{
average_down(S_fine,S_crse,scomp,ncomp,rr*IntVect::TheUnitVector());
}
template<typename FAB>
void average_down (const FabArray<FAB>& S_fine, FabArray<FAB>& S_crse,
int scomp, int ncomp, const IntVect& ratio)
{
BL_PROFILE("amrex::average_down");
AMREX_ASSERT(S_crse.nComp() == S_fine.nComp());
AMREX_ASSERT((S_crse.is_cell_centered() && S_fine.is_cell_centered()) ||
(S_crse.is_nodal() && S_fine.is_nodal()));
using value_type = typename FAB::value_type;
bool is_cell_centered = S_crse.is_cell_centered();
//
// Coarsen() the fine stuff on processors owning the fine data.
//
BoxArray crse_S_fine_BA = S_fine.boxArray(); crse_S_fine_BA.coarsen(ratio);
if (crse_S_fine_BA == S_crse.boxArray() && S_fine.DistributionMap() == S_crse.DistributionMap())
{
#ifdef AMREX_USE_GPU
if (Gpu::inLaunchRegion() && S_crse.isFusingCandidate()) {
auto const& crsema = S_crse.arrays();
auto const& finema = S_fine.const_arrays();
if (is_cell_centered) {
ParallelFor(S_crse, IntVect(0), ncomp,
[=] AMREX_GPU_DEVICE (int box_no, int i, int j, int k, int n) noexcept
{
amrex_avgdown(i,j,k,n,crsema[box_no],finema[box_no],scomp,scomp,ratio);
});
} else {
ParallelFor(S_crse, IntVect(0), ncomp,
[=] AMREX_GPU_DEVICE (int box_no, int i, int j, int k, int n) noexcept
{
amrex_avgdown_nodes(i,j,k,n,crsema[box_no],finema[box_no],scomp,scomp,ratio);
});
}
if (!Gpu::inNoSyncRegion()) {
Gpu::streamSynchronize();
}
} else
#endif
{
#ifdef AMREX_USE_OMP
#pragma omp parallel if (Gpu::notInLaunchRegion())
#endif
for (MFIter mfi(S_crse,TilingIfNotGPU()); mfi.isValid(); ++mfi)
{
// NOTE: The tilebox is defined at the coarse level.
const Box& bx = mfi.tilebox();
Array4<value_type> const& crsearr = S_crse.array(mfi);
Array4<value_type const> const& finearr = S_fine.const_array(mfi);
if (is_cell_centered) {
AMREX_HOST_DEVICE_PARALLEL_FOR_4D(bx, ncomp, i, j, k, n,
{
amrex_avgdown(i,j,k,n,crsearr,finearr,scomp,scomp,ratio);
});
} else {
AMREX_HOST_DEVICE_PARALLEL_FOR_4D(bx, ncomp, i, j, k, n,
{
amrex_avgdown_nodes(i,j,k,n,crsearr,finearr,scomp,scomp,ratio);
});
}
}
}
}
else
{
FabArray<FAB> crse_S_fine(crse_S_fine_BA, S_fine.DistributionMap(), ncomp, 0, MFInfo(),DefaultFabFactory<FAB>());
#ifdef AMREX_USE_GPU
if (Gpu::inLaunchRegion() && crse_S_fine.isFusingCandidate()) {
auto const& crsema = crse_S_fine.arrays();
auto const& finema = S_fine.const_arrays();
if (is_cell_centered) {
ParallelFor(crse_S_fine, IntVect(0), ncomp,
[=] AMREX_GPU_DEVICE (int box_no, int i, int j, int k, int n) noexcept
{
amrex_avgdown(i,j,k,n,crsema[box_no],finema[box_no],0,scomp,ratio);
});
} else {
ParallelFor(crse_S_fine, IntVect(0), ncomp,
[=] AMREX_GPU_DEVICE (int box_no, int i, int j, int k, int n) noexcept
{
amrex_avgdown_nodes(i,j,k,n,crsema[box_no],finema[box_no],0,scomp,ratio);
});
}
if (!Gpu::inNoSyncRegion()) {
Gpu::streamSynchronize();
}
} else
#endif
{
#ifdef AMREX_USE_OMP
#pragma omp parallel if (Gpu::notInLaunchRegion())
#endif
for (MFIter mfi(crse_S_fine,TilingIfNotGPU()); mfi.isValid(); ++mfi)
{
// NOTE: The tilebox is defined at the coarse level.
const Box& bx = mfi.tilebox();
Array4<value_type> const& crsearr = crse_S_fine.array(mfi);
Array4<value_type const> const& finearr = S_fine.const_array(mfi);
// NOTE: We copy from component scomp of the fine fab into component 0 of the crse fab
// because the crse fab is a temporary which was made starting at comp 0, it is
// not part of the actual crse multifab which came in.
if (is_cell_centered) {
AMREX_HOST_DEVICE_PARALLEL_FOR_4D(bx, ncomp, i, j, k, n,
{
amrex_avgdown(i,j,k,n,crsearr,finearr,0,scomp,ratio);
});
} else {
AMREX_HOST_DEVICE_PARALLEL_FOR_4D(bx, ncomp, i, j, k, n,
{
amrex_avgdown_nodes(i,j,k,n,crsearr,finearr,0,scomp,ratio);
});
}
}
}
S_crse.ParallelCopy(crse_S_fine,0,scomp,ncomp);
}
}
/**
* \brief Returns part of a norm based on two MultiFabs.
*
* The MultiFabs MUST have the same underlying BoxArray.
* The function f is applied elementwise as f(x(i,j,k,n),y(i,j,k,n))
* inside the summation (subject to a valid mask entry pf(mask(i,j,k,n)
*/
template <typename F>
Real
NormHelper (const MultiFab& x, int xcomp,
const MultiFab& y, int ycomp,
F const& f,
int numcomp, IntVect nghost, bool local)
{
BL_ASSERT(x.boxArray() == y.boxArray());
BL_ASSERT(x.DistributionMap() == y.DistributionMap());
BL_ASSERT(x.nGrowVect().allGE(nghost) && y.nGrowVect().allGE(nghost));
Real sm = Real(0.0);
#ifdef AMREX_USE_GPU
if (Gpu::inLaunchRegion()) {
auto const& xma = x.const_arrays();
auto const& yma = y.const_arrays();
sm = ParReduce(TypeList<ReduceOpSum>{}, TypeList<Real>{}, x, nghost,
[=] AMREX_GPU_DEVICE (int box_no, int i, int j, int k) noexcept -> GpuTuple<Real>
{
Real t = Real(0.0);
auto const& xfab = xma[box_no];
auto const& yfab = yma[box_no];
for (int n = 0; n < numcomp; ++n) {
t += f(xfab(i,j,k,xcomp+n) , yfab(i,j,k,ycomp+n));
}
return t;
});
} else
#endif
{
#ifdef AMREX_USE_OMP
#pragma omp parallel if (!system::regtest_reduction) reduction(+:sm)
#endif
for (MFIter mfi(x,true); mfi.isValid(); ++mfi)
{
Box const& bx = mfi.growntilebox(nghost);
Array4<Real const> const& xfab = x.const_array(mfi);
Array4<Real const> const& yfab = y.const_array(mfi);
AMREX_LOOP_4D(bx, numcomp, i, j, k, n,
{
sm += f(xfab(i,j,k,xcomp+n) , yfab(i,j,k,ycomp+n));
});
}
}
if (!local) {
ParallelAllReduce::Sum(sm, ParallelContext::CommunicatorSub());
}
return sm;
}
/**
* \brief Returns part of a norm based on three MultiFabs
*
* The MultiFabs MUST have the same underlying BoxArray.
* The Predicate pf is used to test the mask
* The function f is applied elementwise as f(x(i,j,k,n),y(i,j,k,n))
* inside the summation (subject to a valid mask entry pf(mask(i,j,k,n)
*/
template <typename MMF, typename Pred, typename F>
Real
NormHelper (const MMF& mask,
const MultiFab& x, int xcomp,
const MultiFab& y, int ycomp,
Pred const& pf,
F const& f,
int numcomp, IntVect nghost, bool local)
{
BL_ASSERT(x.boxArray() == y.boxArray());
BL_ASSERT(x.boxArray() == mask.boxArray());
BL_ASSERT(x.DistributionMap() == y.DistributionMap());
BL_ASSERT(x.DistributionMap() == mask.DistributionMap());
BL_ASSERT(x.nGrowVect().allGE(nghost) && y.nGrowVect().allGE(nghost));
BL_ASSERT(mask.nGrowVect().allGE(nghost));
Real sm = Real(0.0);
#ifdef AMREX_USE_GPU
if (Gpu::inLaunchRegion()) {
auto const& xma = x.const_arrays();
auto const& yma = y.const_arrays();
auto const& mma = mask.const_arrays();
sm = ParReduce(TypeList<ReduceOpSum>{}, TypeList<Real>{}, x, nghost,
[=] AMREX_GPU_DEVICE (int box_no, int i, int j, int k) noexcept -> GpuTuple<Real>
{
Real t = Real(0.0);
if (pf(mma[box_no](i,j,k))) {
auto const& xfab = xma[box_no];
auto const& yfab = yma[box_no];
for (int n = 0; n < numcomp; ++n) {
t += f(xfab(i,j,k,xcomp+n) , yfab(i,j,k,ycomp+n));
}
}
return t;
});
} else
#endif
{
#ifdef AMREX_USE_OMP
#pragma omp parallel if (!system::regtest_reduction) reduction(+:sm)
#endif
for (MFIter mfi(x,true); mfi.isValid(); ++mfi)
{
Box const& bx = mfi.growntilebox(nghost);
Array4<Real const> const& xfab = x.const_array(mfi);
Array4<Real const> const& yfab = y.const_array(mfi);
auto const& mfab = mask.const_array(mfi);
AMREX_LOOP_4D(bx, numcomp, i, j, k, n,
{
if (pf(mfab(i,j,k))) {
sm += f(xfab(i,j,k,xcomp+n) , yfab(i,j,k,ycomp+n));
}
});
}
}
if (!local) {
ParallelAllReduce::Sum(sm, ParallelContext::CommunicatorSub());
}
return sm;
}
template <typename CMF, typename FMF,
std::enable_if_t<IsFabArray_v<CMF> && IsFabArray_v<FMF>, int> FOO>
void average_face_to_cellcenter (CMF& cc, int dcomp,
const Array<const FMF*,AMREX_SPACEDIM>& fc,
int ngrow)
{
AMREX_ASSERT(cc.nComp() >= dcomp + AMREX_SPACEDIM);
AMREX_ASSERT(fc[0]->nComp() == 1);
#ifdef AMREX_USE_GPU
if (Gpu::inLaunchRegion() && cc.isFusingCandidate()) {
auto const& ccma = cc.arrays();
AMREX_D_TERM(auto const& fxma = fc[0]->const_arrays();,
auto const& fyma = fc[1]->const_arrays();,
auto const& fzma = fc[2]->const_arrays(););
ParallelFor(cc, IntVect(ngrow),
[=] AMREX_GPU_DEVICE (int box_no, int i, int j, int k) noexcept
{
#if (AMREX_SPACEDIM == 1)
GeometryData gd{};
gd.coord = 0;
#endif
amrex_avg_fc_to_cc(i,j,k, ccma[box_no], AMREX_D_DECL(fxma[box_no],
fyma[box_no],
fzma[box_no]),
dcomp
#if (AMREX_SPACEDIM == 1)
, gd
#endif
);
});
if (!Gpu::inNoSyncRegion()) {
Gpu::streamSynchronize();
}
} else
#endif
{
#ifdef AMREX_USE_OMP
#pragma omp parallel if (Gpu::notInLaunchRegion())
#endif
for (MFIter mfi(cc,TilingIfNotGPU()); mfi.isValid(); ++mfi)
{
const Box bx = mfi.growntilebox(ngrow);
auto const& ccarr = cc.array(mfi);
AMREX_D_TERM(auto const& fxarr = fc[0]->const_array(mfi);,
auto const& fyarr = fc[1]->const_array(mfi);,
auto const& fzarr = fc[2]->const_array(mfi););
#if (AMREX_SPACEDIM == 1)
AMREX_HOST_DEVICE_PARALLEL_FOR_3D( bx, i, j, k,
{
GeometryData gd;
gd.coord = 0;
amrex_avg_fc_to_cc(i,j,k, ccarr, fxarr, dcomp, gd);
});
#else
AMREX_HOST_DEVICE_PARALLEL_FOR_3D( bx, i, j, k,
{
amrex_avg_fc_to_cc(i,j,k, ccarr, AMREX_D_DECL(fxarr,fyarr,fzarr), dcomp);
});
#endif
}
}
}
template <typename MF, std::enable_if_t<IsFabArray<MF>::value,int>>
void average_down_faces (const Vector<const MF*>& fine,
const Vector<MF*>& crse,
const IntVect& ratio, int ngcrse)
{
AMREX_ASSERT(fine.size() == AMREX_SPACEDIM && crse.size() == AMREX_SPACEDIM);
average_down_faces(Array<const MF*,AMREX_SPACEDIM>
{{AMREX_D_DECL(fine[0],fine[1],fine[2])}},
Array<MF*,AMREX_SPACEDIM>
{{AMREX_D_DECL(crse[0],crse[1],crse[2])}},
ratio, ngcrse);
}
template <typename MF, std::enable_if_t<IsFabArray<MF>::value,int>>
void average_down_faces (const Vector<const MF*>& fine,
const Vector<MF*>& crse, int ratio, int ngcrse)
{
average_down_faces(fine,crse,IntVect{ratio},ngcrse);
}
template <typename MF, std::enable_if_t<IsFabArray<MF>::value,int>>
void average_down_faces (const Array<const MF*,AMREX_SPACEDIM>& fine,
const Array<MF*,AMREX_SPACEDIM>& crse,
int ratio, int ngcrse)
{
average_down_faces(fine,crse,IntVect{ratio},ngcrse);
}
template <typename MF, std::enable_if_t<IsFabArray<MF>::value,int>>
void average_down_faces (const Array<const MF*,AMREX_SPACEDIM>& fine,
const Array<MF*,AMREX_SPACEDIM>& crse,
const IntVect& ratio, int ngcrse)
{
for (int idim = 0; idim < AMREX_SPACEDIM; ++idim) {
average_down_faces(*fine[idim], *crse[idim], ratio, ngcrse);
}
}
template <typename FAB>
void average_down_faces (const FabArray<FAB>& fine, FabArray<FAB>& crse,
const IntVect& ratio, int ngcrse)
{
BL_PROFILE("average_down_faces");
AMREX_ASSERT(crse.nComp() == fine.nComp());
AMREX_ASSERT(fine.ixType() == crse.ixType());
const auto type = fine.ixType();
int dir;
for (dir = 0; dir < AMREX_SPACEDIM; ++dir) {
if (type.nodeCentered(dir)) { break; }
}
auto tmptype = type;
tmptype.unset(dir);
if (dir >= AMREX_SPACEDIM || !tmptype.cellCentered()) {
amrex::Abort("average_down_faces: not face index type");
}
const int ncomp = crse.nComp();
if (isMFIterSafe(fine, crse))
{
#ifdef AMREX_USE_GPU
if (Gpu::inLaunchRegion() && crse.isFusingCandidate()) {
auto const& crsema = crse.arrays();
auto const& finema = fine.const_arrays();
ParallelFor(crse, IntVect(ngcrse), ncomp,
[=] AMREX_GPU_DEVICE (int box_no, int i, int j, int k, int n) noexcept
{
amrex_avgdown_faces(i,j,k,n, crsema[box_no], finema[box_no], 0, 0, ratio, dir);
});
if (!Gpu::inNoSyncRegion()) {
Gpu::streamSynchronize();
}
} else
#endif
{
#ifdef AMREX_USE_OMP
#pragma omp parallel if (Gpu::notInLaunchRegion())
#endif
for (MFIter mfi(crse,TilingIfNotGPU()); mfi.isValid(); ++mfi)
{
const Box& bx = mfi.growntilebox(ngcrse);
auto const& crsearr = crse.array(mfi);
auto const& finearr = fine.const_array(mfi);
AMREX_HOST_DEVICE_PARALLEL_FOR_4D(bx, ncomp, i, j, k, n,
{
amrex_avgdown_faces(i,j,k,n, crsearr, finearr, 0, 0, ratio, dir);
});
}
}
}
else
{
FabArray<FAB> ctmp(amrex::coarsen(fine.boxArray(),ratio), fine.DistributionMap(),
ncomp, ngcrse, MFInfo(), DefaultFabFactory<FAB>());
average_down_faces(fine, ctmp, ratio, ngcrse);
crse.ParallelCopy(ctmp,0,0,ncomp,ngcrse,ngcrse);
}
}
template <typename MF, std::enable_if_t<IsFabArray<MF>::value,int>>
void average_down_faces (const Array<const MF*,AMREX_SPACEDIM>& fine,
const Array<MF*,AMREX_SPACEDIM>& crse,
const IntVect& ratio, const Geometry& crse_geom)
{
for (int idim = 0; idim < AMREX_SPACEDIM; ++idim) {
average_down_faces(*fine[idim], *crse[idim], ratio, crse_geom);
}
}
template <typename FAB>
void average_down_faces (const FabArray<FAB>& fine, FabArray<FAB>& crse,
const IntVect& ratio, const Geometry& crse_geom)
{
FabArray<FAB> ctmp(amrex::coarsen(fine.boxArray(),ratio), fine.DistributionMap(),
crse.nComp(), 0);
average_down_faces(fine, ctmp, ratio, 0);
crse.ParallelCopy(ctmp,0,0,crse.nComp(),0,0,crse_geom.periodicity());
}
template <typename MF, std::enable_if_t<IsFabArray<MF>::value,int> FOO>
Vector<typename MF::value_type> get_cell_data (MF const& mf, IntVect const& cell)
{
using T = typename MF::value_type;
const int ncomp = mf.nComp();
Gpu::DeviceVector<T> dv(ncomp);
auto* dp = dv.data();
bool found = false;
auto loc = cell.dim3();
for (MFIter mfi(mf); mfi.isValid() && !found; ++mfi)
{
Box const& box = mfi.validbox();
if (box.contains(cell)) {
found = true;
auto const& fab = mf.const_array(mfi);
amrex::ParallelFor(1, [=] AMREX_GPU_DEVICE (int) noexcept
{
for (int n = 0; n < ncomp; ++n) {
dp[n] = fab(loc.x,loc.y,loc.z,n);
}
});
}
}
Vector<T> hv;
if (found) {
hv.resize(ncomp);
Gpu::copy(Gpu::deviceToHost, dv.begin(), dv.end(), hv.begin());
}
return hv;
}
template <typename MF, std::enable_if_t<IsFabArray<MF>::value,int> FOO>
MF get_line_data (MF const& mf, int dir, IntVect const& cell)
{