forked from lijiext/lammps
97 lines
3.5 KiB
Plaintext
97 lines
3.5 KiB
Plaintext
/* ----------------------------------------------------------------------
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LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
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Original Version:
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http://lammps.sandia.gov, Sandia National Laboratories
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Steve Plimpton, sjplimp@sandia.gov
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See the README file in the top-level LAMMPS directory.
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-----------------------------------------------------------------------
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USER-CUDA Package and associated modifications:
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https://sourceforge.net/projects/lammpscuda/
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Christian Trott, christian.trott@tu-ilmenau.de
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Lars Winterfeld, lars.winterfeld@tu-ilmenau.de
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Theoretical Physics II, University of Technology Ilmenau, Germany
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See the README file in the USER-CUDA directory.
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This software is distributed under the GNU General Public License.
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------------------------------------------------------------------------- */
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#include <stdio.h>
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#define MY_PREFIX fix_set_force_cuda
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#include "cuda_shared.h"
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#include "cuda_common.h"
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#include "crm_cuda_utils.cu"
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#include "fix_set_force_cuda_cu.h"
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#include "fix_set_force_cuda_kernel.cu"
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void Cuda_FixSetForceCuda_UpdateBuffer(cuda_shared_data* sdata)
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{
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int3 layout = getgrid(sdata->atom.nlocal, 3 * sizeof(F_FLOAT));
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dim3 threads(layout.z, 1, 1);
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dim3 grid(layout.x, layout.y, 1);
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int size = (unsigned)(layout.z * layout.y * layout.x) * 3 * sizeof(F_FLOAT);
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if(sdata->buffersize < size) {
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MYDBG(printf("Cuda_FixSetForceCuda Resizing Buffer at %p with %i kB to\n", sdata->buffer, sdata->buffersize);)
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CudaWrapper_FreeCudaData(sdata->buffer, sdata->buffersize);
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sdata->buffer = CudaWrapper_AllocCudaData(size);
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sdata->buffersize = size;
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sdata->buffer_new++;
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MYDBG(printf("New buffer at %p with %i kB\n", sdata->buffer, sdata->buffersize);)
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}
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cudaMemcpyToSymbol(MY_AP(buffer) , & sdata->buffer, sizeof(int*));
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}
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void Cuda_FixSetForceCuda_UpdateNmax(cuda_shared_data* sdata)
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{
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cudaMemcpyToSymbol(MY_AP(mask) , & sdata->atom.mask .dev_data, sizeof(int*));
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cudaMemcpyToSymbol(MY_AP(nlocal) , & sdata->atom.nlocal , sizeof(int));
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cudaMemcpyToSymbol(MY_AP(nmax) , & sdata->atom.nmax , sizeof(int));
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cudaMemcpyToSymbol(MY_AP(x) , & sdata->atom.x .dev_data, sizeof(X_FLOAT*));
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cudaMemcpyToSymbol(MY_AP(f) , & sdata->atom.f .dev_data, sizeof(F_FLOAT*));
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}
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void Cuda_FixSetForceCuda_Init(cuda_shared_data* sdata)
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{
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Cuda_FixSetForceCuda_UpdateNmax(sdata);
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}
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void Cuda_FixSetForceCuda_PostForce(cuda_shared_data* sdata, int groupbit, F_FLOAT xvalue, F_FLOAT yvalue, F_FLOAT zvalue, F_FLOAT* foriginal, int flagx, int flagy, int flagz)
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{
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if(sdata->atom.update_nmax)
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Cuda_FixSetForceCuda_UpdateNmax(sdata);
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if(sdata->atom.update_nlocal)
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cudaMemcpyToSymbol(MY_AP(nlocal) , & sdata->atom.nlocal , sizeof(int));
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if(sdata->buffer_new)
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Cuda_FixSetForceCuda_UpdateBuffer(sdata);
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int3 layout = getgrid(sdata->atom.nlocal, 3 * sizeof(F_FLOAT));
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dim3 threads(layout.z, 1, 1);
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dim3 grid(layout.x, layout.y, 1);
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Cuda_FixSetForceCuda_PostForce_Kernel <<< grid, threads, threads.x* 3* sizeof(F_FLOAT)>>> (groupbit, xvalue, yvalue, zvalue, flagx, flagy, flagz);
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cudaThreadSynchronize();
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CUT_CHECK_ERROR("Cuda_Cuda_FixSetForceCuda_PostForce: fix add_force post_force compute Kernel execution failed");
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int oldgrid = grid.x;
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grid.x = 3;
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threads.x = 512;
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Cuda_FixSetForceCuda_Reduce_FOriginal <<< grid, threads, threads.x* sizeof(F_FLOAT)>>> (oldgrid, foriginal);
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cudaThreadSynchronize();
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CUT_CHECK_ERROR("Cuda_Cuda_FixSetForceCuda_PostForce: fix add_force post_force reduce Kernel execution failed");
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}
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