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#include <fftw3.h>
#include <algorithm>
#include <memory>
#include <random>
#include <vector>
#include "gtest/gtest.h"
#include "gtest_mpi.hpp"
#include "memory/array_view_utility.hpp"
#include "memory/host_array.hpp"
#include "memory/host_array_view.hpp"
#include "mpi_util/mpi_communicator_handle.hpp"
#include "parameters/parameters.hpp"
#include "util/common_types.hpp"
#if defined(SPFFT_CUDA) || defined(SPFFT_ROCM)
#include "execution/execution_gpu.hpp"
#include "memory/gpu_array.hpp"
#include "transpose/transpose_mpi_buffered_gpu.hpp"
#include "transpose/transpose_mpi_compact_buffered_gpu.hpp"
#include "transpose/transpose_mpi_unbuffered_gpu.hpp"
using namespace spfft;
class TransposeGPUTest : public ::testing::Test {
protected:
void SetUp() override {
comm_ = MPICommunicatorHandle(MPI_COMM_WORLD);
SizeType dimX = 2 * comm_.size();
SizeType dimY = 3 * comm_.size();
SizeType dimZ = 4 * comm_.size();
// create memory space
array1_ = HostArray<std::complex<double>>(dimX * dimY * dimZ, std::complex<double>(1.0, 1.0));
array2_ = HostArray<std::complex<double>>(dimX * dimY * dimZ, std::complex<double>(1.0, 1.0));
fullArray_ = HostArray<std::complex<double>>(dimX * dimY * dimZ);
gpuArray1_ = GPUArray<typename gpu::fft::ComplexType<double>::type>(array1_.size());
gpuArray2_ = GPUArray<typename gpu::fft::ComplexType<double>::type>(array1_.size());
// pinn arrays
array1_.pin_memory();
array2_.pin_memory();
// plane split between ranks
const SizeType numLocalXYPlanes =
(dimZ / comm_.size()) + (comm_.rank() == comm_.size() - 1 ? dimZ % comm_.size() : 0);
const SizeType localXYPlaneOffset = (dimZ / comm_.size()) * comm_.rank();
// create all indices the same way (random generator must be equally initialized)
std::mt19937 sharedRandGen(42);
std::uniform_real_distribution<double> dis(0.0, 1.0);
std::uniform_int_distribution<int> rankSelector(0, comm_.size() - 1);
std::vector<int> indexTriplets;
indexTriplets.reserve(dimX * dimY * dimZ);
for (int x = 0; x < static_cast<int>(dimX); ++x) {
for (int y = 0; y < static_cast<int>(dimY); ++y) {
// create sparse z stick distribution
if (dis(sharedRandGen) < 0.5 && rankSelector(sharedRandGen) == comm_.size()) {
for (int z = 0; z < static_cast<int>(dimY); ++z) {
indexTriplets.push_back(x);
indexTriplets.push_back(y);
indexTriplets.push_back(z);
}
}
}
}
paramPtr_.reset(new Parameters(comm_, SPFFT_TRANS_C2C, dimX, dimY, dimZ, numLocalXYPlanes,
indexTriplets.size() / 3, SPFFT_INDEX_TRIPLETS,
indexTriplets.data()));
// initialize random z-stick data
auto fullView = create_3d_view(fullArray_, 0, dimX, dimY, dimZ);
auto freqView = create_2d_view(array1_, 0, paramPtr_->num_z_sticks(comm_.rank()), dimZ);
for (SizeType r = 0; r < comm_.size(); ++r) {
for (const auto& stickIdx : paramPtr_->z_stick_xy_indices(r)) {
const auto x = stickIdx / dimY;
const auto y = stickIdx - x * dimY;
for (SizeType z = 0; z < freqView.dim_inner(); ++z) {
fullView(x, y, z) = std::complex<double>(dis(sharedRandGen), dis(sharedRandGen));
}
}
}
// copy data into sticks
SizeType count = 0;
for (const auto& stickIdx : paramPtr_->z_stick_xy_indices(comm_.rank())) {
const auto x = stickIdx / dimY;
const auto y = stickIdx - x * dimY;
for (SizeType z = 0; z < freqView.dim_inner(); ++z) {
freqView(count, z) = fullView(x, y, z);
}
++count;
}
}
MPICommunicatorHandle comm_;
std::shared_ptr<Parameters> paramPtr_;
HostArray<std::complex<double>> array1_;
HostArray<std::complex<double>> array2_;
HostArray<std::complex<double>> fullArray_;
GPUArray<typename gpu::fft::ComplexType<double>::type> gpuArray1_;
GPUArray<typename gpu::fft::ComplexType<double>::type> gpuArray2_;
};
static void check_space_domain(const HostArrayView3D<std::complex<double>>& realView,
const HostArrayView3D<std::complex<double>>& fullView,
const SizeType planeOffset, const SizeType numLocalXYPlanes) {
for (SizeType z = 0; z < numLocalXYPlanes; ++z) {
for (SizeType x = 0; x < fullView.dim_outer(); ++x) {
for (SizeType y = 0; y < fullView.dim_mid(); ++y) {
EXPECT_EQ(realView(z, y, x).real(), fullView(x, y, z + planeOffset).real());
EXPECT_EQ(realView(z, y, x).imag(), fullView(x, y, z + planeOffset).imag());
}
}
}
}
static void check_freq_domain(const HostArrayView2D<std::complex<double>>& freqView,
const HostArrayView3D<std::complex<double>>& fullView,
HostArrayConstView1D<int> xyIndices) {
for (SizeType stickIdx = 0; stickIdx < freqView.dim_outer(); ++stickIdx) {
const auto x = stickIdx / fullView.dim_outer();
const auto y = stickIdx - x * fullView.dim_outer();
for (SizeType z = 0; z < freqView.dim_inner(); ++z) {
EXPECT_EQ(freqView(stickIdx, z).real(), fullView(x, y, z).real());
EXPECT_EQ(freqView(stickIdx, z).imag(), fullView(x, y, z).imag());
}
}
}
TEST_F(TransposeGPUTest, Buffered) {
GTEST_MPI_GUARD
auto freqXYView = create_3d_view(array2_, 0, paramPtr_->num_xy_planes(comm_.rank()),
paramPtr_->dim_y(), paramPtr_->dim_x());
auto freqXYViewGPU = create_3d_view(gpuArray2_, 0, paramPtr_->num_xy_planes(comm_.rank()),
paramPtr_->dim_y(), paramPtr_->dim_x());
auto freqView =
create_2d_view(array1_, 0, paramPtr_->num_z_sticks(comm_.rank()), paramPtr_->dim_z());
auto freqViewGPU =
create_2d_view(gpuArray1_, 0, paramPtr_->num_z_sticks(comm_.rank()), paramPtr_->dim_z());
auto fullView =
create_3d_view(fullArray_, 0, paramPtr_->dim_x(), paramPtr_->dim_y(), paramPtr_->dim_z());
GPUStreamHandle stream(false);
auto transposeBufferZ = create_1d_view(
array2_, 0, comm_.size() * paramPtr_->max_num_xy_planes() * paramPtr_->max_num_z_sticks());
auto transposeBufferZGPU = create_1d_view(
gpuArray2_, 0, comm_.size() * paramPtr_->max_num_xy_planes() * paramPtr_->max_num_z_sticks());
auto transposeBufferXY = create_1d_view(
array1_, 0, comm_.size() * paramPtr_->max_num_xy_planes() * paramPtr_->max_num_z_sticks());
auto transposeBufferXYGPU = create_1d_view(
gpuArray1_, 0, comm_.size() * paramPtr_->max_num_xy_planes() * paramPtr_->max_num_z_sticks());
TransposeMPIBufferedGPU<double, double> transpose(
paramPtr_, comm_, transposeBufferXY, freqXYViewGPU, transposeBufferXYGPU, stream,
transposeBufferZ, freqViewGPU, transposeBufferZGPU, stream);
copy_to_gpu_async(stream, freqView, freqViewGPU);
transpose.backward();
copy_from_gpu_async(stream, freqXYViewGPU, freqXYView);
gpu::check_status(gpu::stream_synchronize(stream.get()));
check_space_domain(freqXYView, fullView, paramPtr_->xy_plane_offset(comm_.rank()),
paramPtr_->num_xy_planes(comm_.rank()));
transpose.forward();
copy_from_gpu_async(stream, freqViewGPU, freqView);
gpu::check_status(gpu::stream_synchronize(stream.get()));
check_freq_domain(freqView, fullView, paramPtr_->z_stick_xy_indices(comm_.rank()));
}
TEST_F(TransposeGPUTest, CompactBuffered) {
GTEST_MPI_GUARD
auto freqXYView = create_3d_view(array2_, 0, paramPtr_->num_xy_planes(comm_.rank()),
paramPtr_->dim_y(), paramPtr_->dim_x());
auto freqXYViewGPU = create_3d_view(gpuArray2_, 0, paramPtr_->num_xy_planes(comm_.rank()),
paramPtr_->dim_y(), paramPtr_->dim_x());
auto freqView =
create_2d_view(array1_, 0, paramPtr_->num_z_sticks(comm_.rank()), paramPtr_->dim_z());
auto freqViewGPU =
create_2d_view(gpuArray1_, 0, paramPtr_->num_z_sticks(comm_.rank()), paramPtr_->dim_z());
auto fullView =
create_3d_view(fullArray_, 0, paramPtr_->dim_x(), paramPtr_->dim_y(), paramPtr_->dim_z());
GPUStreamHandle stream(false);
auto transposeBufferZ = create_1d_view(
array2_, 0, comm_.size() * paramPtr_->max_num_xy_planes() * paramPtr_->max_num_z_sticks());
auto transposeBufferZGPU = create_1d_view(
gpuArray2_, 0, comm_.size() * paramPtr_->max_num_xy_planes() * paramPtr_->max_num_z_sticks());
auto transposeBufferXY = create_1d_view(
array1_, 0, comm_.size() * paramPtr_->max_num_xy_planes() * paramPtr_->max_num_z_sticks());
auto transposeBufferXYGPU = create_1d_view(
gpuArray1_, 0, comm_.size() * paramPtr_->max_num_xy_planes() * paramPtr_->max_num_z_sticks());
TransposeMPICompactBufferedGPU<double, double> transpose(
paramPtr_, comm_, transposeBufferXY, freqXYViewGPU, transposeBufferXYGPU, stream,
transposeBufferZ, freqViewGPU, transposeBufferZGPU, stream);
copy_to_gpu_async(stream, freqView, freqViewGPU);
transpose.pack_backward();
transpose.backward();
transpose.unpack_backward();
copy_from_gpu_async(stream, freqXYViewGPU, freqXYView);
gpu::check_status(gpu::stream_synchronize(stream.get()));
check_space_domain(freqXYView, fullView, paramPtr_->xy_plane_offset(comm_.rank()),
paramPtr_->num_xy_planes(comm_.rank()));
transpose.forward();
copy_from_gpu_async(stream, freqViewGPU, freqView);
gpu::check_status(gpu::stream_synchronize(stream.get()));
check_freq_domain(freqView, fullView, paramPtr_->z_stick_xy_indices(comm_.rank()));
}
TEST_F(TransposeGPUTest, Unbuffered) {
GTEST_MPI_GUARD
auto freqXYView = create_3d_view(array2_, 0, paramPtr_->num_xy_planes(comm_.rank()),
paramPtr_->dim_y(), paramPtr_->dim_x());
auto freqXYViewGPU = create_3d_view(gpuArray2_, 0, paramPtr_->num_xy_planes(comm_.rank()),
paramPtr_->dim_y(), paramPtr_->dim_x());
auto freqView =
create_2d_view(array1_, 0, paramPtr_->num_z_sticks(comm_.rank()), paramPtr_->dim_z());
auto freqViewGPU =
create_2d_view(gpuArray1_, 0, paramPtr_->num_z_sticks(comm_.rank()), paramPtr_->dim_z());
auto fullView =
create_3d_view(fullArray_, 0, paramPtr_->dim_x(), paramPtr_->dim_y(), paramPtr_->dim_z());
GPUStreamHandle stream(false);
TransposeMPIUnbufferedGPU<double> transpose(paramPtr_, comm_, freqXYView, freqXYViewGPU, stream,
freqView, freqViewGPU, stream);
copy_to_gpu_async(stream, freqView, freqViewGPU);
transpose.backward();
copy_from_gpu_async(stream, freqXYViewGPU, freqXYView);
gpu::check_status(gpu::stream_synchronize(stream.get()));
check_space_domain(freqXYView, fullView, paramPtr_->xy_plane_offset(comm_.rank()),
paramPtr_->num_xy_planes(comm_.rank()));
transpose.forward();
copy_from_gpu_async(stream, freqViewGPU, freqView);
gpu::check_status(gpu::stream_synchronize(stream.get()));
check_freq_domain(freqView, fullView, paramPtr_->z_stick_xy_indices(comm_.rank()));
}
#endif
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