1 // Copyright (c) 2017-2018, Lawrence Livermore National Security, LLC. 2 // Produced at the Lawrence Livermore National Laboratory. LLNL-CODE-734707. 3 // All Rights reserved. See files LICENSE and NOTICE for details. 4 // 5 // This file is part of CEED, a collection of benchmarks, miniapps, software 6 // libraries and APIs for efficient high-order finite element and spectral 7 // element discretizations for exascale applications. For more information and 8 // source code availability see http://github.com/ceed. 9 // 10 // The CEED research is supported by the Exascale Computing Project 17-SC-20-SC, 11 // a collaborative effort of two U.S. Department of Energy organizations (Office 12 // of Science and the National Nuclear Security Administration) responsible for 13 // the planning and preparation of a capable exascale ecosystem, including 14 // software, applications, hardware, advanced system engineering and early 15 // testbed platforms, in support of the nation's exascale computing imperative. 16 17 #include <ceed.h> 18 #include <ceed-backend.h> 19 #include <stddef.h> 20 #include "ceed-cuda-gen.h" 21 #include "ceed-cuda-gen-operator-build.h" 22 #include "../cuda/ceed-cuda.h" 23 24 //------------------------------------------------------------------------------ 25 // Destroy operator 26 //------------------------------------------------------------------------------ 27 static int CeedOperatorDestroy_Cuda_gen(CeedOperator op) { 28 int ierr; 29 CeedOperator_Cuda_gen *impl; 30 ierr = CeedOperatorGetData(op, &impl); CeedChk(ierr); 31 ierr = CeedFree(&impl); CeedChk(ierr); 32 return 0; 33 } 34 35 //------------------------------------------------------------------------------ 36 // Apply and add to output 37 //------------------------------------------------------------------------------ 38 static int CeedOperatorApplyAdd_Cuda_gen(CeedOperator op, CeedVector invec, 39 CeedVector outvec, CeedRequest *request) { 40 int ierr; 41 Ceed ceed; 42 ierr = CeedOperatorGetCeed(op, &ceed); CeedChk(ierr); 43 CeedOperator_Cuda_gen *data; 44 ierr = CeedOperatorGetData(op, &data); CeedChk(ierr); 45 CeedQFunction qf; 46 CeedQFunction_Cuda_gen *qf_data; 47 ierr = CeedOperatorGetQFunction(op, &qf); CeedChk(ierr); 48 ierr = CeedQFunctionGetData(qf, &qf_data); CeedChk(ierr); 49 CeedInt nelem, numinputfields, numoutputfields; 50 ierr = CeedOperatorGetNumElements(op, &nelem); CeedChk(ierr); 51 ierr = CeedQFunctionGetNumArgs(qf, &numinputfields, &numoutputfields); 52 CeedChk(ierr); 53 CeedOperatorField *opinputfields, *opoutputfields; 54 ierr = CeedOperatorGetFields(op, &opinputfields, &opoutputfields); 55 CeedChk(ierr); 56 CeedQFunctionField *qfinputfields, *qfoutputfields; 57 ierr = CeedQFunctionGetFields(qf, &qfinputfields, &qfoutputfields); 58 CeedChk(ierr); 59 CeedEvalMode emode; 60 CeedVector vec, outvecs[16] = {}; 61 62 //Creation of the operator 63 ierr = CeedCudaGenOperatorBuild(op); CeedChk(ierr); 64 65 // Input vectors 66 for (CeedInt i = 0; i < numinputfields; i++) { 67 ierr = CeedQFunctionFieldGetEvalMode(qfinputfields[i], &emode); 68 CeedChk(ierr); 69 if (emode == CEED_EVAL_WEIGHT) { // Skip 70 data->fields.in[i] = NULL; 71 } else { 72 // Get input vector 73 ierr = CeedOperatorFieldGetVector(opinputfields[i], &vec); CeedChk(ierr); 74 if (vec == CEED_VECTOR_ACTIVE) vec = invec; 75 ierr = CeedVectorGetArrayRead(vec, CEED_MEM_DEVICE, &data->fields.in[i]); 76 CeedChk(ierr); 77 } 78 } 79 80 // Output vectors 81 for (CeedInt i = 0; i < numoutputfields; i++) { 82 ierr = CeedQFunctionFieldGetEvalMode(qfoutputfields[i], &emode); 83 CeedChk(ierr); 84 if (emode == CEED_EVAL_WEIGHT) { // Skip 85 data->fields.out[i] = NULL; 86 } else { 87 // Get output vector 88 ierr = CeedOperatorFieldGetVector(opoutputfields[i], &vec); CeedChk(ierr); 89 if (vec == CEED_VECTOR_ACTIVE) vec = outvec; 90 outvecs[i] = vec; 91 // Check for multiple output modes 92 CeedInt index = -1; 93 for (CeedInt j = 0; j < i; j++) { 94 if (vec == outvecs[j]) { 95 index = j; 96 break; 97 } 98 } 99 if (index == -1) { 100 ierr = CeedVectorGetArray(vec, CEED_MEM_DEVICE, &data->fields.out[i]); 101 CeedChk(ierr); 102 } else { 103 data->fields.out[i] = data->fields.out[index]; 104 } 105 } 106 } 107 108 // Get context data 109 CeedQFunctionContext ctx; 110 ierr = CeedQFunctionGetInnerContext(qf, &ctx); CeedChk(ierr); 111 if (ctx) { 112 ierr = CeedQFunctionContextGetData(ctx, CEED_MEM_DEVICE, &qf_data->d_c); 113 CeedChk(ierr); 114 } 115 116 // Apply operator 117 void *opargs[] = {(void *) &nelem, &qf_data->d_c, &data->indices, 118 &data->fields, &data->B, &data->G, &data->W 119 }; 120 const CeedInt dim = data->dim; 121 const CeedInt Q1d = data->Q1d; 122 const CeedInt P1d = data->maxP1d; 123 const CeedInt thread1d = CeedIntMax(Q1d, P1d); 124 if (dim==1) { 125 const CeedInt elemsPerBlock = 32; 126 CeedInt grid = nelem/elemsPerBlock + ( (nelem/elemsPerBlock*elemsPerBlock<nelem) 127 ? 1 : 0 ); 128 CeedInt sharedMem = elemsPerBlock*thread1d*sizeof(CeedScalar); 129 ierr = CeedRunKernelDimSharedCuda(ceed, data->op, grid, thread1d, 1, 130 elemsPerBlock, sharedMem, opargs); 131 } else if (dim==2) { 132 const CeedInt elemsPerBlock = thread1d<4? 16 : 2; 133 CeedInt grid = nelem/elemsPerBlock + ( (nelem/elemsPerBlock*elemsPerBlock<nelem) 134 ? 1 : 0 ); 135 CeedInt sharedMem = elemsPerBlock*thread1d*thread1d*sizeof(CeedScalar); 136 ierr = CeedRunKernelDimSharedCuda(ceed, data->op, grid, thread1d, thread1d, 137 elemsPerBlock, sharedMem, opargs); 138 } else if (dim==3) { 139 const CeedInt elemsPerBlock = thread1d<6? 4 : (thread1d<8? 2 : 1); 140 CeedInt grid = nelem/elemsPerBlock + ( (nelem/elemsPerBlock*elemsPerBlock<nelem) 141 ? 1 : 0 ); 142 CeedInt sharedMem = elemsPerBlock*thread1d*thread1d*sizeof(CeedScalar); 143 ierr = CeedRunKernelDimSharedCuda(ceed, data->op, grid, thread1d, thread1d, 144 elemsPerBlock, sharedMem, opargs); 145 } 146 CeedChk(ierr); 147 148 // Restore input arrays 149 for (CeedInt i = 0; i < numinputfields; i++) { 150 ierr = CeedQFunctionFieldGetEvalMode(qfinputfields[i], &emode); 151 CeedChk(ierr); 152 if (emode == CEED_EVAL_WEIGHT) { // Skip 153 } else { 154 ierr = CeedOperatorFieldGetVector(opinputfields[i], &vec); CeedChk(ierr); 155 if (vec == CEED_VECTOR_ACTIVE) vec = invec; 156 ierr = CeedVectorRestoreArrayRead(vec, &data->fields.in[i]); 157 CeedChk(ierr); 158 } 159 } 160 161 // Restore output arrays 162 for (CeedInt i = 0; i < numoutputfields; i++) { 163 ierr = CeedQFunctionFieldGetEvalMode(qfoutputfields[i], &emode); 164 CeedChk(ierr); 165 if (emode == CEED_EVAL_WEIGHT) { // Skip 166 } else { 167 ierr = CeedOperatorFieldGetVector(opoutputfields[i], &vec); CeedChk(ierr); 168 if (vec == CEED_VECTOR_ACTIVE) vec = outvec; 169 // Check for multiple output modes 170 CeedInt index = -1; 171 for (CeedInt j = 0; j < i; j++) { 172 if (vec == outvecs[j]) { 173 index = j; 174 break; 175 } 176 } 177 if (index == -1) { 178 ierr = CeedVectorRestoreArray(vec, &data->fields.out[i]); 179 CeedChk(ierr); 180 } 181 } 182 } 183 184 // Restore context data 185 if (ctx) { 186 ierr = CeedQFunctionContextRestoreData(ctx, &qf_data->d_c); 187 CeedChk(ierr); 188 } 189 return 0; 190 } 191 192 //------------------------------------------------------------------------------ 193 // Create FDM element inverse not supported 194 //------------------------------------------------------------------------------ 195 static int CeedOperatorCreateFDMElementInverse_Cuda(CeedOperator op) { 196 // LCOV_EXCL_START 197 int ierr; 198 Ceed ceed; 199 ierr = CeedOperatorGetCeed(op, &ceed); CeedChk(ierr); 200 return CeedError(ceed, 1, "Backend does not implement FDM inverse creation"); 201 // LCOV_EXCL_STOP 202 } 203 204 //------------------------------------------------------------------------------ 205 // Create operator 206 //------------------------------------------------------------------------------ 207 int CeedOperatorCreate_Cuda_gen(CeedOperator op) { 208 int ierr; 209 Ceed ceed; 210 ierr = CeedOperatorGetCeed(op, &ceed); CeedChk(ierr); 211 CeedOperator_Cuda_gen *impl; 212 213 ierr = CeedCalloc(1, &impl); CeedChk(ierr); 214 ierr = CeedOperatorSetData(op, impl); CeedChk(ierr); 215 216 ierr = CeedSetBackendFunction(ceed, "Operator", op, "CreateFDMElementInverse", 217 CeedOperatorCreateFDMElementInverse_Cuda); 218 CeedChk(ierr); 219 ierr = CeedSetBackendFunction(ceed, "Operator", op, "ApplyAdd", 220 CeedOperatorApplyAdd_Cuda_gen); CeedChk(ierr); 221 ierr = CeedSetBackendFunction(ceed, "Operator", op, "Destroy", 222 CeedOperatorDestroy_Cuda_gen); CeedChk(ierr); 223 return 0; 224 } 225 //------------------------------------------------------------------------------ 226