1 // Copyright (c) 2017-2025, Lawrence Livermore National Security, LLC and other CEED contributors. 2 // All Rights Reserved. See the top-level LICENSE and NOTICE files for details. 3 // 4 // SPDX-License-Identifier: BSD-2-Clause 5 // 6 // This file is part of CEED: http://github.com/ceed 7 8 #include <ceed.h> 9 #include <ceed/backend.h> 10 #include <cuda_runtime.h> 11 #include <math.h> 12 #include <stdbool.h> 13 #include <string.h> 14 15 #include "../cuda/ceed-cuda-common.h" 16 #include "ceed-cuda-ref.h" 17 18 //------------------------------------------------------------------------------ 19 // Check if host/device sync is needed 20 //------------------------------------------------------------------------------ 21 static inline int CeedVectorNeedSync_Cuda(const CeedVector vec, CeedMemType mem_type, bool *need_sync) { 22 bool has_valid_array = false; 23 CeedVector_Cuda *impl; 24 25 CeedCallBackend(CeedVectorGetData(vec, &impl)); 26 CeedCallBackend(CeedVectorHasValidArray(vec, &has_valid_array)); 27 switch (mem_type) { 28 case CEED_MEM_HOST: 29 *need_sync = has_valid_array && !impl->h_array; 30 break; 31 case CEED_MEM_DEVICE: 32 *need_sync = has_valid_array && !impl->d_array; 33 break; 34 } 35 return CEED_ERROR_SUCCESS; 36 } 37 38 //------------------------------------------------------------------------------ 39 // Sync host to device 40 //------------------------------------------------------------------------------ 41 static inline int CeedVectorSyncH2D_Cuda(const CeedVector vec) { 42 CeedSize length; 43 size_t bytes; 44 CeedVector_Cuda *impl; 45 46 CeedCallBackend(CeedVectorGetData(vec, &impl)); 47 48 CeedCheck(impl->h_array, CeedVectorReturnCeed(vec), CEED_ERROR_BACKEND, "No valid host data to sync to device"); 49 50 CeedCallBackend(CeedVectorGetLength(vec, &length)); 51 bytes = length * sizeof(CeedScalar); 52 if (impl->d_array_borrowed) { 53 impl->d_array = impl->d_array_borrowed; 54 } else if (impl->d_array_owned) { 55 impl->d_array = impl->d_array_owned; 56 } else { 57 CeedCallCuda(CeedVectorReturnCeed(vec), cudaMalloc((void **)&impl->d_array_owned, bytes)); 58 impl->d_array = impl->d_array_owned; 59 } 60 CeedCallCuda(CeedVectorReturnCeed(vec), cudaMemcpy(impl->d_array, impl->h_array, bytes, cudaMemcpyHostToDevice)); 61 return CEED_ERROR_SUCCESS; 62 } 63 64 //------------------------------------------------------------------------------ 65 // Sync device to host 66 //------------------------------------------------------------------------------ 67 static inline int CeedVectorSyncD2H_Cuda(const CeedVector vec) { 68 CeedSize length; 69 CeedVector_Cuda *impl; 70 71 CeedCallBackend(CeedVectorGetData(vec, &impl)); 72 73 CeedCheck(impl->d_array, CeedVectorReturnCeed(vec), CEED_ERROR_BACKEND, "No valid device data to sync to host"); 74 75 if (impl->h_array_borrowed) { 76 impl->h_array = impl->h_array_borrowed; 77 } else if (impl->h_array_owned) { 78 impl->h_array = impl->h_array_owned; 79 } else { 80 CeedSize length; 81 82 CeedCallBackend(CeedVectorGetLength(vec, &length)); 83 CeedCallBackend(CeedCalloc(length, &impl->h_array_owned)); 84 impl->h_array = impl->h_array_owned; 85 } 86 87 CeedCallBackend(CeedVectorGetLength(vec, &length)); 88 size_t bytes = length * sizeof(CeedScalar); 89 90 CeedCallCuda(CeedVectorReturnCeed(vec), cudaMemcpy(impl->h_array, impl->d_array, bytes, cudaMemcpyDeviceToHost)); 91 return CEED_ERROR_SUCCESS; 92 } 93 94 //------------------------------------------------------------------------------ 95 // Sync arrays 96 //------------------------------------------------------------------------------ 97 static int CeedVectorSyncArray_Cuda(const CeedVector vec, CeedMemType mem_type) { 98 bool need_sync = false; 99 100 // Check whether device/host sync is needed 101 CeedCallBackend(CeedVectorNeedSync_Cuda(vec, mem_type, &need_sync)); 102 if (!need_sync) return CEED_ERROR_SUCCESS; 103 104 switch (mem_type) { 105 case CEED_MEM_HOST: 106 return CeedVectorSyncD2H_Cuda(vec); 107 case CEED_MEM_DEVICE: 108 return CeedVectorSyncH2D_Cuda(vec); 109 } 110 return CEED_ERROR_UNSUPPORTED; 111 } 112 113 //------------------------------------------------------------------------------ 114 // Set all pointers as invalid 115 //------------------------------------------------------------------------------ 116 static inline int CeedVectorSetAllInvalid_Cuda(const CeedVector vec) { 117 CeedVector_Cuda *impl; 118 119 CeedCallBackend(CeedVectorGetData(vec, &impl)); 120 impl->h_array = NULL; 121 impl->d_array = NULL; 122 return CEED_ERROR_SUCCESS; 123 } 124 125 //------------------------------------------------------------------------------ 126 // Check if CeedVector has any valid pointer 127 //------------------------------------------------------------------------------ 128 static inline int CeedVectorHasValidArray_Cuda(const CeedVector vec, bool *has_valid_array) { 129 CeedVector_Cuda *impl; 130 131 CeedCallBackend(CeedVectorGetData(vec, &impl)); 132 *has_valid_array = impl->h_array || impl->d_array; 133 return CEED_ERROR_SUCCESS; 134 } 135 136 //------------------------------------------------------------------------------ 137 // Check if has array of given type 138 //------------------------------------------------------------------------------ 139 static inline int CeedVectorHasArrayOfType_Cuda(const CeedVector vec, CeedMemType mem_type, bool *has_array_of_type) { 140 CeedVector_Cuda *impl; 141 142 CeedCallBackend(CeedVectorGetData(vec, &impl)); 143 switch (mem_type) { 144 case CEED_MEM_HOST: 145 *has_array_of_type = impl->h_array_borrowed || impl->h_array_owned; 146 break; 147 case CEED_MEM_DEVICE: 148 *has_array_of_type = impl->d_array_borrowed || impl->d_array_owned; 149 break; 150 } 151 return CEED_ERROR_SUCCESS; 152 } 153 154 //------------------------------------------------------------------------------ 155 // Check if has borrowed array of given type 156 //------------------------------------------------------------------------------ 157 static inline int CeedVectorHasBorrowedArrayOfType_Cuda(const CeedVector vec, CeedMemType mem_type, bool *has_borrowed_array_of_type) { 158 CeedVector_Cuda *impl; 159 160 CeedCallBackend(CeedVectorGetData(vec, &impl)); 161 switch (mem_type) { 162 case CEED_MEM_HOST: 163 *has_borrowed_array_of_type = impl->h_array_borrowed; 164 break; 165 case CEED_MEM_DEVICE: 166 *has_borrowed_array_of_type = impl->d_array_borrowed; 167 break; 168 } 169 return CEED_ERROR_SUCCESS; 170 } 171 172 //------------------------------------------------------------------------------ 173 // Set array from host 174 //------------------------------------------------------------------------------ 175 static int CeedVectorSetArrayHost_Cuda(const CeedVector vec, const CeedCopyMode copy_mode, CeedScalar *array) { 176 CeedSize length; 177 CeedVector_Cuda *impl; 178 179 CeedCallBackend(CeedVectorGetData(vec, &impl)); 180 CeedCallBackend(CeedVectorGetLength(vec, &length)); 181 182 CeedCallBackend(CeedSetHostCeedScalarArray(array, copy_mode, length, (const CeedScalar **)&impl->h_array_owned, 183 (const CeedScalar **)&impl->h_array_borrowed, (const CeedScalar **)&impl->h_array)); 184 return CEED_ERROR_SUCCESS; 185 } 186 187 //------------------------------------------------------------------------------ 188 // Set array from device 189 //------------------------------------------------------------------------------ 190 static int CeedVectorSetArrayDevice_Cuda(const CeedVector vec, const CeedCopyMode copy_mode, CeedScalar *array) { 191 CeedSize length; 192 Ceed ceed; 193 CeedVector_Cuda *impl; 194 195 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 196 CeedCallBackend(CeedVectorGetData(vec, &impl)); 197 CeedCallBackend(CeedVectorGetLength(vec, &length)); 198 199 CeedCallBackend(CeedSetDeviceCeedScalarArray_Cuda(ceed, array, copy_mode, length, (const CeedScalar **)&impl->d_array_owned, 200 (const CeedScalar **)&impl->d_array_borrowed, (const CeedScalar **)&impl->d_array)); 201 CeedCallBackend(CeedDestroy(&ceed)); 202 return CEED_ERROR_SUCCESS; 203 } 204 205 //------------------------------------------------------------------------------ 206 // Set the array used by a vector, 207 // freeing any previously allocated array if applicable 208 //------------------------------------------------------------------------------ 209 static int CeedVectorSetArray_Cuda(const CeedVector vec, const CeedMemType mem_type, const CeedCopyMode copy_mode, CeedScalar *array) { 210 CeedVector_Cuda *impl; 211 212 CeedCallBackend(CeedVectorGetData(vec, &impl)); 213 CeedCallBackend(CeedVectorSetAllInvalid_Cuda(vec)); 214 switch (mem_type) { 215 case CEED_MEM_HOST: 216 return CeedVectorSetArrayHost_Cuda(vec, copy_mode, array); 217 case CEED_MEM_DEVICE: 218 return CeedVectorSetArrayDevice_Cuda(vec, copy_mode, array); 219 } 220 return CEED_ERROR_UNSUPPORTED; 221 } 222 223 //------------------------------------------------------------------------------ 224 // Copy host array to value strided 225 //------------------------------------------------------------------------------ 226 static int CeedHostCopyStrided_Cuda(CeedScalar *h_array, CeedSize start, CeedSize step, CeedSize length, CeedScalar *h_copy_array) { 227 for (CeedSize i = start; i < length; i += step) h_copy_array[i] = h_array[i]; 228 return CEED_ERROR_SUCCESS; 229 } 230 231 //------------------------------------------------------------------------------ 232 // Copy device array to value strided (impl in .cu file) 233 //------------------------------------------------------------------------------ 234 int CeedDeviceCopyStrided_Cuda(CeedScalar *d_array, CeedSize start, CeedSize step, CeedSize length, CeedScalar *d_copy_array); 235 236 //------------------------------------------------------------------------------ 237 // Copy a vector to a value strided 238 //------------------------------------------------------------------------------ 239 static int CeedVectorCopyStrided_Cuda(CeedVector vec, CeedSize start, CeedSize step, CeedVector vec_copy) { 240 CeedSize length; 241 CeedVector_Cuda *impl; 242 243 CeedCallBackend(CeedVectorGetData(vec, &impl)); 244 { 245 CeedSize length_vec, length_copy; 246 247 CeedCallBackend(CeedVectorGetLength(vec, &length_vec)); 248 CeedCallBackend(CeedVectorGetLength(vec_copy, &length_copy)); 249 length = length_vec < length_copy ? length_vec : length_copy; 250 } 251 // Set value for synced device/host array 252 if (impl->d_array) { 253 CeedScalar *copy_array; 254 255 CeedCallBackend(CeedVectorGetArray(vec_copy, CEED_MEM_DEVICE, ©_array)); 256 #if (CUDA_VERSION >= 12000) 257 cublasHandle_t handle; 258 Ceed ceed; 259 260 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 261 CeedCallBackend(CeedGetCublasHandle_Cuda(ceed, &handle)); 262 #if defined(CEED_SCALAR_IS_FP32) 263 CeedCallCublas(ceed, cublasScopy_64(handle, (int64_t)length, impl->d_array + start, (int64_t)step, copy_array + start, (int64_t)step)); 264 #else /* CEED_SCALAR */ 265 CeedCallCublas(ceed, cublasDcopy_64(handle, (int64_t)length, impl->d_array + start, (int64_t)step, copy_array + start, (int64_t)step)); 266 #endif /* CEED_SCALAR */ 267 CeedCallBackend(CeedDestroy(&ceed)); 268 #else /* CUDA_VERSION */ 269 CeedCallBackend(CeedDeviceCopyStrided_Cuda(impl->d_array, start, step, length, copy_array)); 270 #endif /* CUDA_VERSION */ 271 CeedCallBackend(CeedVectorRestoreArray(vec_copy, ©_array)); 272 impl->h_array = NULL; 273 } else if (impl->h_array) { 274 CeedScalar *copy_array; 275 276 CeedCallBackend(CeedVectorGetArray(vec_copy, CEED_MEM_HOST, ©_array)); 277 CeedCallBackend(CeedHostCopyStrided_Cuda(impl->h_array, start, step, length, copy_array)); 278 CeedCallBackend(CeedVectorRestoreArray(vec_copy, ©_array)); 279 impl->d_array = NULL; 280 } else { 281 return CeedError(CeedVectorReturnCeed(vec), CEED_ERROR_BACKEND, "CeedVector must have valid data set"); 282 } 283 return CEED_ERROR_SUCCESS; 284 } 285 286 //------------------------------------------------------------------------------ 287 // Set host array to value 288 //------------------------------------------------------------------------------ 289 static int CeedHostSetValue_Cuda(CeedScalar *h_array, CeedSize length, CeedScalar val) { 290 for (CeedSize i = 0; i < length; i++) h_array[i] = val; 291 return CEED_ERROR_SUCCESS; 292 } 293 294 //------------------------------------------------------------------------------ 295 // Set device array to value (impl in .cu file) 296 //------------------------------------------------------------------------------ 297 int CeedDeviceSetValue_Cuda(CeedScalar *d_array, CeedSize length, CeedScalar val); 298 299 //------------------------------------------------------------------------------ 300 // Set a vector to a value 301 //------------------------------------------------------------------------------ 302 static int CeedVectorSetValue_Cuda(CeedVector vec, CeedScalar val) { 303 CeedSize length; 304 CeedVector_Cuda *impl; 305 306 CeedCallBackend(CeedVectorGetData(vec, &impl)); 307 CeedCallBackend(CeedVectorGetLength(vec, &length)); 308 // Set value for synced device/host array 309 if (!impl->d_array && !impl->h_array) { 310 if (impl->d_array_borrowed) { 311 impl->d_array = impl->d_array_borrowed; 312 } else if (impl->h_array_borrowed) { 313 impl->h_array = impl->h_array_borrowed; 314 } else if (impl->d_array_owned) { 315 impl->d_array = impl->d_array_owned; 316 } else if (impl->h_array_owned) { 317 impl->h_array = impl->h_array_owned; 318 } else { 319 CeedCallBackend(CeedVectorSetArray(vec, CEED_MEM_DEVICE, CEED_COPY_VALUES, NULL)); 320 } 321 } 322 if (impl->d_array) { 323 if (val == 0) { 324 CeedCallCuda(CeedVectorReturnCeed(vec), cudaMemset(impl->d_array, 0, length * sizeof(CeedScalar))); 325 } else { 326 CeedCallBackend(CeedDeviceSetValue_Cuda(impl->d_array, length, val)); 327 } 328 impl->h_array = NULL; 329 } else if (impl->h_array) { 330 CeedCallBackend(CeedHostSetValue_Cuda(impl->h_array, length, val)); 331 impl->d_array = NULL; 332 } 333 return CEED_ERROR_SUCCESS; 334 } 335 336 //------------------------------------------------------------------------------ 337 // Set host array to value strided 338 //------------------------------------------------------------------------------ 339 static int CeedHostSetValueStrided_Cuda(CeedScalar *h_array, CeedSize start, CeedSize stop, CeedSize step, CeedScalar val) { 340 for (CeedSize i = start; i < stop; i += step) h_array[i] = val; 341 return CEED_ERROR_SUCCESS; 342 } 343 344 //------------------------------------------------------------------------------ 345 // Set device array to value strided (impl in .cu file) 346 //------------------------------------------------------------------------------ 347 int CeedDeviceSetValueStrided_Cuda(CeedScalar *d_array, CeedSize start, CeedSize stop, CeedSize step, CeedScalar val); 348 349 //------------------------------------------------------------------------------ 350 // Set a vector to a value strided 351 //------------------------------------------------------------------------------ 352 static int CeedVectorSetValueStrided_Cuda(CeedVector vec, CeedSize start, CeedSize stop, CeedSize step, CeedScalar val) { 353 CeedSize length; 354 CeedVector_Cuda *impl; 355 356 CeedCallBackend(CeedVectorGetData(vec, &impl)); 357 CeedCallBackend(CeedVectorGetLength(vec, &length)); 358 // Set value for synced device/host array 359 if (stop == -1) stop = length; 360 if (impl->d_array) { 361 CeedCallBackend(CeedDeviceSetValueStrided_Cuda(impl->d_array, start, stop, step, val)); 362 impl->h_array = NULL; 363 } else if (impl->h_array) { 364 CeedCallBackend(CeedHostSetValueStrided_Cuda(impl->h_array, start, stop, step, val)); 365 impl->d_array = NULL; 366 } else { 367 return CeedError(CeedVectorReturnCeed(vec), CEED_ERROR_BACKEND, "CeedVector must have valid data set"); 368 } 369 return CEED_ERROR_SUCCESS; 370 } 371 372 //------------------------------------------------------------------------------ 373 // Vector Take Array 374 //------------------------------------------------------------------------------ 375 static int CeedVectorTakeArray_Cuda(CeedVector vec, CeedMemType mem_type, CeedScalar **array) { 376 CeedVector_Cuda *impl; 377 378 CeedCallBackend(CeedVectorGetData(vec, &impl)); 379 // Sync array to requested mem_type 380 CeedCallBackend(CeedVectorSyncArray(vec, mem_type)); 381 // Update pointer 382 switch (mem_type) { 383 case CEED_MEM_HOST: 384 (*array) = impl->h_array_borrowed; 385 impl->h_array_borrowed = NULL; 386 impl->h_array = NULL; 387 break; 388 case CEED_MEM_DEVICE: 389 (*array) = impl->d_array_borrowed; 390 impl->d_array_borrowed = NULL; 391 impl->d_array = NULL; 392 break; 393 } 394 return CEED_ERROR_SUCCESS; 395 } 396 397 //------------------------------------------------------------------------------ 398 // Core logic for array syncronization for GetArray. 399 // If a different memory type is most up to date, this will perform a copy 400 //------------------------------------------------------------------------------ 401 static int CeedVectorGetArrayCore_Cuda(const CeedVector vec, const CeedMemType mem_type, CeedScalar **array) { 402 CeedVector_Cuda *impl; 403 404 CeedCallBackend(CeedVectorGetData(vec, &impl)); 405 // Sync array to requested mem_type 406 CeedCallBackend(CeedVectorSyncArray(vec, mem_type)); 407 // Update pointer 408 switch (mem_type) { 409 case CEED_MEM_HOST: 410 *array = impl->h_array; 411 break; 412 case CEED_MEM_DEVICE: 413 *array = impl->d_array; 414 break; 415 } 416 return CEED_ERROR_SUCCESS; 417 } 418 419 //------------------------------------------------------------------------------ 420 // Get read-only access to a vector via the specified mem_type 421 //------------------------------------------------------------------------------ 422 static int CeedVectorGetArrayRead_Cuda(const CeedVector vec, const CeedMemType mem_type, const CeedScalar **array) { 423 return CeedVectorGetArrayCore_Cuda(vec, mem_type, (CeedScalar **)array); 424 } 425 426 //------------------------------------------------------------------------------ 427 // Get read/write access to a vector via the specified mem_type 428 //------------------------------------------------------------------------------ 429 static int CeedVectorGetArray_Cuda(const CeedVector vec, const CeedMemType mem_type, CeedScalar **array) { 430 CeedVector_Cuda *impl; 431 432 CeedCallBackend(CeedVectorGetData(vec, &impl)); 433 CeedCallBackend(CeedVectorGetArrayCore_Cuda(vec, mem_type, array)); 434 CeedCallBackend(CeedVectorSetAllInvalid_Cuda(vec)); 435 switch (mem_type) { 436 case CEED_MEM_HOST: 437 impl->h_array = *array; 438 break; 439 case CEED_MEM_DEVICE: 440 impl->d_array = *array; 441 break; 442 } 443 return CEED_ERROR_SUCCESS; 444 } 445 446 //------------------------------------------------------------------------------ 447 // Get write access to a vector via the specified mem_type 448 //------------------------------------------------------------------------------ 449 static int CeedVectorGetArrayWrite_Cuda(const CeedVector vec, const CeedMemType mem_type, CeedScalar **array) { 450 bool has_array_of_type = true; 451 CeedVector_Cuda *impl; 452 453 CeedCallBackend(CeedVectorGetData(vec, &impl)); 454 CeedCallBackend(CeedVectorHasArrayOfType_Cuda(vec, mem_type, &has_array_of_type)); 455 if (!has_array_of_type) { 456 // Allocate if array is not yet allocated 457 CeedCallBackend(CeedVectorSetArray(vec, mem_type, CEED_COPY_VALUES, NULL)); 458 } else { 459 // Select dirty array 460 switch (mem_type) { 461 case CEED_MEM_HOST: 462 if (impl->h_array_borrowed) impl->h_array = impl->h_array_borrowed; 463 else impl->h_array = impl->h_array_owned; 464 break; 465 case CEED_MEM_DEVICE: 466 if (impl->d_array_borrowed) impl->d_array = impl->d_array_borrowed; 467 else impl->d_array = impl->d_array_owned; 468 } 469 } 470 return CeedVectorGetArray_Cuda(vec, mem_type, array); 471 } 472 473 //------------------------------------------------------------------------------ 474 // Get the norm of a CeedVector 475 //------------------------------------------------------------------------------ 476 static int CeedVectorNorm_Cuda(CeedVector vec, CeedNormType type, CeedScalar *norm) { 477 Ceed ceed; 478 CeedSize length; 479 #if (CUDA_VERSION < 12000) 480 CeedSize num_calls; 481 #endif /* CUDA_VERSION */ 482 const CeedScalar *d_array; 483 CeedVector_Cuda *impl; 484 cublasHandle_t handle; 485 486 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 487 CeedCallBackend(CeedVectorGetData(vec, &impl)); 488 CeedCallBackend(CeedVectorGetLength(vec, &length)); 489 CeedCallBackend(CeedGetCublasHandle_Cuda(ceed, &handle)); 490 491 #if (CUDA_VERSION < 12000) 492 // With CUDA 12, we can use the 64-bit integer interface. Prior to that, 493 // we need to check if the vector is too long to handle with int32, 494 // and if so, divide it into subsections for repeated cuBLAS calls. 495 num_calls = length / INT_MAX; 496 if (length % INT_MAX > 0) num_calls += 1; 497 #endif /* CUDA_VERSION */ 498 499 // Compute norm 500 CeedCallBackend(CeedVectorGetArrayRead(vec, CEED_MEM_DEVICE, &d_array)); 501 switch (type) { 502 case CEED_NORM_1: { 503 *norm = 0.0; 504 #if defined(CEED_SCALAR_IS_FP32) 505 #if (CUDA_VERSION >= 12000) // We have CUDA 12, and can use 64-bit integers 506 CeedCallCublas(ceed, cublasSasum_64(handle, (int64_t)length, (float *)d_array, 1, (float *)norm)); 507 #else /* CUDA_VERSION */ 508 float sub_norm = 0.0; 509 float *d_array_start; 510 511 for (CeedInt i = 0; i < num_calls; i++) { 512 d_array_start = (float *)d_array + (CeedSize)(i)*INT_MAX; 513 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 514 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 515 516 CeedCallCublas(ceed, cublasSasum(handle, (CeedInt)sub_length, (float *)d_array_start, 1, &sub_norm)); 517 *norm += sub_norm; 518 } 519 #endif /* CUDA_VERSION */ 520 #else /* CEED_SCALAR */ 521 #if (CUDA_VERSION >= 12000) 522 CeedCallCublas(ceed, cublasDasum_64(handle, (int64_t)length, (double *)d_array, 1, (double *)norm)); 523 #else /* CUDA_VERSION */ 524 double sub_norm = 0.0; 525 double *d_array_start; 526 527 for (CeedInt i = 0; i < num_calls; i++) { 528 d_array_start = (double *)d_array + (CeedSize)(i)*INT_MAX; 529 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 530 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 531 532 CeedCallCublas(ceed, cublasDasum(handle, (CeedInt)sub_length, (double *)d_array_start, 1, &sub_norm)); 533 *norm += sub_norm; 534 } 535 #endif /* CUDA_VERSION */ 536 #endif /* CEED_SCALAR */ 537 break; 538 } 539 case CEED_NORM_2: { 540 #if defined(CEED_SCALAR_IS_FP32) 541 #if (CUDA_VERSION >= 12000) 542 CeedCallCublas(ceed, cublasSnrm2_64(handle, (int64_t)length, (float *)d_array, 1, (float *)norm)); 543 #else /* CUDA_VERSION */ 544 float sub_norm = 0.0, norm_sum = 0.0; 545 float *d_array_start; 546 547 for (CeedInt i = 0; i < num_calls; i++) { 548 d_array_start = (float *)d_array + (CeedSize)(i)*INT_MAX; 549 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 550 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 551 552 CeedCallCublas(ceed, cublasSnrm2(handle, (CeedInt)sub_length, (float *)d_array_start, 1, &sub_norm)); 553 norm_sum += sub_norm * sub_norm; 554 } 555 *norm = sqrt(norm_sum); 556 #endif /* CUDA_VERSION */ 557 #else /* CEED_SCALAR */ 558 #if (CUDA_VERSION >= 12000) 559 CeedCallCublas(ceed, cublasDnrm2_64(handle, (int64_t)length, (double *)d_array, 1, (double *)norm)); 560 #else /* CUDA_VERSION */ 561 double sub_norm = 0.0, norm_sum = 0.0; 562 double *d_array_start; 563 564 for (CeedInt i = 0; i < num_calls; i++) { 565 d_array_start = (double *)d_array + (CeedSize)(i)*INT_MAX; 566 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 567 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 568 569 CeedCallCublas(ceed, cublasDnrm2(handle, (CeedInt)sub_length, (double *)d_array_start, 1, &sub_norm)); 570 norm_sum += sub_norm * sub_norm; 571 } 572 *norm = sqrt(norm_sum); 573 #endif /* CUDA_VERSION */ 574 #endif /* CEED_SCALAR */ 575 break; 576 } 577 case CEED_NORM_MAX: { 578 #if defined(CEED_SCALAR_IS_FP32) 579 #if (CUDA_VERSION >= 12000) 580 int64_t index; 581 CeedScalar norm_no_abs; 582 583 CeedCallCublas(ceed, cublasIsamax_64(handle, (int64_t)length, (float *)d_array, 1, &index)); 584 CeedCallCuda(ceed, cudaMemcpy(&norm_no_abs, impl->d_array + index - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 585 *norm = fabs(norm_no_abs); 586 #else /* CUDA_VERSION */ 587 CeedInt index; 588 float sub_max = 0.0, current_max = 0.0; 589 float *d_array_start; 590 591 for (CeedInt i = 0; i < num_calls; i++) { 592 d_array_start = (float *)d_array + (CeedSize)(i)*INT_MAX; 593 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 594 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 595 596 CeedCallCublas(ceed, cublasIsamax(handle, (CeedInt)sub_length, (float *)d_array_start, 1, &index)); 597 CeedCallCuda(ceed, cudaMemcpy(&sub_max, d_array_start + index - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 598 if (fabs(sub_max) > current_max) current_max = fabs(sub_max); 599 } 600 *norm = current_max; 601 #endif /* CUDA_VERSION */ 602 #else /* CEED_SCALAR */ 603 #if (CUDA_VERSION >= 12000) 604 int64_t index; 605 CeedScalar norm_no_abs; 606 607 CeedCallCublas(ceed, cublasIdamax_64(handle, (int64_t)length, (double *)d_array, 1, &index)); 608 CeedCallCuda(ceed, cudaMemcpy(&norm_no_abs, impl->d_array + index - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 609 *norm = fabs(norm_no_abs); 610 #else /* CUDA_VERSION */ 611 CeedInt index; 612 double sub_max = 0.0, current_max = 0.0; 613 double *d_array_start; 614 615 for (CeedInt i = 0; i < num_calls; i++) { 616 d_array_start = (double *)d_array + (CeedSize)(i)*INT_MAX; 617 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 618 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 619 620 CeedCallCublas(ceed, cublasIdamax(handle, (CeedInt)sub_length, (double *)d_array_start, 1, &index)); 621 CeedCallCuda(ceed, cudaMemcpy(&sub_max, d_array_start + index - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 622 if (fabs(sub_max) > current_max) current_max = fabs(sub_max); 623 } 624 *norm = current_max; 625 #endif /* CUDA_VERSION */ 626 #endif /* CEED_SCALAR */ 627 break; 628 } 629 } 630 CeedCallBackend(CeedVectorRestoreArrayRead(vec, &d_array)); 631 CeedCallBackend(CeedDestroy(&ceed)); 632 return CEED_ERROR_SUCCESS; 633 } 634 635 //------------------------------------------------------------------------------ 636 // Take reciprocal of a vector on host 637 //------------------------------------------------------------------------------ 638 static int CeedHostReciprocal_Cuda(CeedScalar *h_array, CeedSize length) { 639 for (CeedSize i = 0; i < length; i++) { 640 if (fabs(h_array[i]) > CEED_EPSILON) h_array[i] = 1. / h_array[i]; 641 } 642 return CEED_ERROR_SUCCESS; 643 } 644 645 //------------------------------------------------------------------------------ 646 // Take reciprocal of a vector on device (impl in .cu file) 647 //------------------------------------------------------------------------------ 648 int CeedDeviceReciprocal_Cuda(CeedScalar *d_array, CeedSize length); 649 650 //------------------------------------------------------------------------------ 651 // Take reciprocal of a vector 652 //------------------------------------------------------------------------------ 653 static int CeedVectorReciprocal_Cuda(CeedVector vec) { 654 CeedSize length; 655 CeedVector_Cuda *impl; 656 657 CeedCallBackend(CeedVectorGetData(vec, &impl)); 658 CeedCallBackend(CeedVectorGetLength(vec, &length)); 659 // Set value for synced device/host array 660 if (impl->d_array) CeedCallBackend(CeedDeviceReciprocal_Cuda(impl->d_array, length)); 661 if (impl->h_array) CeedCallBackend(CeedHostReciprocal_Cuda(impl->h_array, length)); 662 return CEED_ERROR_SUCCESS; 663 } 664 665 //------------------------------------------------------------------------------ 666 // Compute x = alpha x on the host 667 //------------------------------------------------------------------------------ 668 static int CeedHostScale_Cuda(CeedScalar *x_array, CeedScalar alpha, CeedSize length) { 669 for (CeedSize i = 0; i < length; i++) x_array[i] *= alpha; 670 return CEED_ERROR_SUCCESS; 671 } 672 673 //------------------------------------------------------------------------------ 674 // Compute x = alpha x on device (impl in .cu file) 675 //------------------------------------------------------------------------------ 676 int CeedDeviceScale_Cuda(CeedScalar *x_array, CeedScalar alpha, CeedSize length); 677 678 //------------------------------------------------------------------------------ 679 // Compute x = alpha x 680 //------------------------------------------------------------------------------ 681 static int CeedVectorScale_Cuda(CeedVector x, CeedScalar alpha) { 682 CeedSize length; 683 CeedVector_Cuda *impl; 684 685 CeedCallBackend(CeedVectorGetData(x, &impl)); 686 CeedCallBackend(CeedVectorGetLength(x, &length)); 687 // Set value for synced device/host array 688 if (impl->d_array) { 689 #if (CUDA_VERSION >= 12000) 690 cublasHandle_t handle; 691 692 CeedCallBackend(CeedGetCublasHandle_Cuda(CeedVectorReturnCeed(x), &handle)); 693 #if defined(CEED_SCALAR_IS_FP32) 694 CeedCallCublas(CeedVectorReturnCeed(x), cublasSscal_64(handle, (int64_t)length, &alpha, impl->d_array, 1)); 695 #else /* CEED_SCALAR */ 696 CeedCallCublas(CeedVectorReturnCeed(x), cublasDscal_64(handle, (int64_t)length, &alpha, impl->d_array, 1)); 697 #endif /* CEED_SCALAR */ 698 #else /* CUDA_VERSION */ 699 CeedCallBackend(CeedDeviceScale_Cuda(impl->d_array, alpha, length)); 700 #endif /* CUDA_VERSION */ 701 impl->h_array = NULL; 702 } else if (impl->h_array) { 703 CeedCallBackend(CeedHostScale_Cuda(impl->h_array, alpha, length)); 704 impl->d_array = NULL; 705 } 706 return CEED_ERROR_SUCCESS; 707 } 708 709 //------------------------------------------------------------------------------ 710 // Compute y = alpha x + y on the host 711 //------------------------------------------------------------------------------ 712 static int CeedHostAXPY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar *x_array, CeedSize length) { 713 for (CeedSize i = 0; i < length; i++) y_array[i] += alpha * x_array[i]; 714 return CEED_ERROR_SUCCESS; 715 } 716 717 //------------------------------------------------------------------------------ 718 // Compute y = alpha x + y on device (impl in .cu file) 719 //------------------------------------------------------------------------------ 720 int CeedDeviceAXPY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar *x_array, CeedSize length); 721 722 //------------------------------------------------------------------------------ 723 // Compute y = alpha x + y 724 //------------------------------------------------------------------------------ 725 static int CeedVectorAXPY_Cuda(CeedVector y, CeedScalar alpha, CeedVector x) { 726 CeedSize length; 727 CeedVector_Cuda *y_impl, *x_impl; 728 729 CeedCallBackend(CeedVectorGetData(y, &y_impl)); 730 CeedCallBackend(CeedVectorGetData(x, &x_impl)); 731 CeedCallBackend(CeedVectorGetLength(y, &length)); 732 // Set value for synced device/host array 733 if (y_impl->d_array) { 734 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_DEVICE)); 735 #if (CUDA_VERSION >= 12000) 736 cublasHandle_t handle; 737 738 CeedCallBackend(CeedGetCublasHandle_Cuda(CeedVectorReturnCeed(y), &handle)); 739 #if defined(CEED_SCALAR_IS_FP32) 740 CeedCallCublas(CeedVectorReturnCeed(y), cublasSaxpy_64(handle, (int64_t)length, &alpha, x_impl->d_array, 1, y_impl->d_array, 1)); 741 #else /* CEED_SCALAR */ 742 CeedCallCublas(CeedVectorReturnCeed(y), cublasDaxpy_64(handle, (int64_t)length, &alpha, x_impl->d_array, 1, y_impl->d_array, 1)); 743 #endif /* CEED_SCALAR */ 744 #else /* CUDA_VERSION */ 745 CeedCallBackend(CeedDeviceAXPY_Cuda(y_impl->d_array, alpha, x_impl->d_array, length)); 746 #endif /* CUDA_VERSION */ 747 y_impl->h_array = NULL; 748 } else if (y_impl->h_array) { 749 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_HOST)); 750 CeedCallBackend(CeedHostAXPY_Cuda(y_impl->h_array, alpha, x_impl->h_array, length)); 751 y_impl->d_array = NULL; 752 } 753 return CEED_ERROR_SUCCESS; 754 } 755 756 //------------------------------------------------------------------------------ 757 // Compute y = alpha x + beta y on the host 758 //------------------------------------------------------------------------------ 759 static int CeedHostAXPBY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar beta, CeedScalar *x_array, CeedSize length) { 760 for (CeedSize i = 0; i < length; i++) y_array[i] = alpha * x_array[i] + beta * y_array[i]; 761 return CEED_ERROR_SUCCESS; 762 } 763 764 //------------------------------------------------------------------------------ 765 // Compute y = alpha x + beta y on device (impl in .cu file) 766 //------------------------------------------------------------------------------ 767 int CeedDeviceAXPBY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar beta, CeedScalar *x_array, CeedSize length); 768 769 //------------------------------------------------------------------------------ 770 // Compute y = alpha x + beta y 771 //------------------------------------------------------------------------------ 772 static int CeedVectorAXPBY_Cuda(CeedVector y, CeedScalar alpha, CeedScalar beta, CeedVector x) { 773 CeedSize length; 774 CeedVector_Cuda *y_impl, *x_impl; 775 776 CeedCallBackend(CeedVectorGetData(y, &y_impl)); 777 CeedCallBackend(CeedVectorGetData(x, &x_impl)); 778 CeedCallBackend(CeedVectorGetLength(y, &length)); 779 // Set value for synced device/host array 780 if (y_impl->d_array) { 781 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_DEVICE)); 782 CeedCallBackend(CeedDeviceAXPBY_Cuda(y_impl->d_array, alpha, beta, x_impl->d_array, length)); 783 } 784 if (y_impl->h_array) { 785 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_HOST)); 786 CeedCallBackend(CeedHostAXPBY_Cuda(y_impl->h_array, alpha, beta, x_impl->h_array, length)); 787 } 788 return CEED_ERROR_SUCCESS; 789 } 790 791 //------------------------------------------------------------------------------ 792 // Compute the pointwise multiplication w = x .* y on the host 793 //------------------------------------------------------------------------------ 794 static int CeedHostPointwiseMult_Cuda(CeedScalar *w_array, CeedScalar *x_array, CeedScalar *y_array, CeedSize length) { 795 for (CeedSize i = 0; i < length; i++) w_array[i] = x_array[i] * y_array[i]; 796 return CEED_ERROR_SUCCESS; 797 } 798 799 //------------------------------------------------------------------------------ 800 // Compute the pointwise multiplication w = x .* y on device (impl in .cu file) 801 //------------------------------------------------------------------------------ 802 int CeedDevicePointwiseMult_Cuda(CeedScalar *w_array, CeedScalar *x_array, CeedScalar *y_array, CeedSize length); 803 804 //------------------------------------------------------------------------------ 805 // Compute the pointwise multiplication w = x .* y 806 //------------------------------------------------------------------------------ 807 static int CeedVectorPointwiseMult_Cuda(CeedVector w, CeedVector x, CeedVector y) { 808 CeedSize length; 809 CeedVector_Cuda *w_impl, *x_impl, *y_impl; 810 811 CeedCallBackend(CeedVectorGetData(w, &w_impl)); 812 CeedCallBackend(CeedVectorGetData(x, &x_impl)); 813 CeedCallBackend(CeedVectorGetData(y, &y_impl)); 814 CeedCallBackend(CeedVectorGetLength(w, &length)); 815 // Set value for synced device/host array 816 if (!w_impl->d_array && !w_impl->h_array) { 817 CeedCallBackend(CeedVectorSetValue(w, 0.0)); 818 } 819 if (w_impl->d_array) { 820 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_DEVICE)); 821 CeedCallBackend(CeedVectorSyncArray(y, CEED_MEM_DEVICE)); 822 CeedCallBackend(CeedDevicePointwiseMult_Cuda(w_impl->d_array, x_impl->d_array, y_impl->d_array, length)); 823 } 824 if (w_impl->h_array) { 825 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_HOST)); 826 CeedCallBackend(CeedVectorSyncArray(y, CEED_MEM_HOST)); 827 CeedCallBackend(CeedHostPointwiseMult_Cuda(w_impl->h_array, x_impl->h_array, y_impl->h_array, length)); 828 } 829 return CEED_ERROR_SUCCESS; 830 } 831 832 //------------------------------------------------------------------------------ 833 // Destroy the vector 834 //------------------------------------------------------------------------------ 835 static int CeedVectorDestroy_Cuda(const CeedVector vec) { 836 CeedVector_Cuda *impl; 837 838 CeedCallBackend(CeedVectorGetData(vec, &impl)); 839 CeedCallCuda(CeedVectorReturnCeed(vec), cudaFree(impl->d_array_owned)); 840 CeedCallBackend(CeedFree(&impl->h_array_owned)); 841 CeedCallBackend(CeedFree(&impl)); 842 return CEED_ERROR_SUCCESS; 843 } 844 845 //------------------------------------------------------------------------------ 846 // Create a vector of the specified length (does not allocate memory) 847 //------------------------------------------------------------------------------ 848 int CeedVectorCreate_Cuda(CeedSize n, CeedVector vec) { 849 CeedVector_Cuda *impl; 850 Ceed ceed; 851 852 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 853 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "HasValidArray", CeedVectorHasValidArray_Cuda)); 854 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "HasBorrowedArrayOfType", CeedVectorHasBorrowedArrayOfType_Cuda)); 855 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "SetArray", CeedVectorSetArray_Cuda)); 856 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "TakeArray", CeedVectorTakeArray_Cuda)); 857 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "CopyStrided", CeedVectorCopyStrided_Cuda)); 858 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "SetValue", CeedVectorSetValue_Cuda)); 859 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "SetValueStrided", CeedVectorSetValueStrided_Cuda)); 860 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "SyncArray", CeedVectorSyncArray_Cuda)); 861 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "GetArray", CeedVectorGetArray_Cuda)); 862 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "GetArrayRead", CeedVectorGetArrayRead_Cuda)); 863 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "GetArrayWrite", CeedVectorGetArrayWrite_Cuda)); 864 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Norm", CeedVectorNorm_Cuda)); 865 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Reciprocal", CeedVectorReciprocal_Cuda)); 866 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Scale", CeedVectorScale_Cuda)); 867 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "AXPY", CeedVectorAXPY_Cuda)); 868 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "AXPBY", CeedVectorAXPBY_Cuda)); 869 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "PointwiseMult", CeedVectorPointwiseMult_Cuda)); 870 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Destroy", CeedVectorDestroy_Cuda)); 871 CeedCallBackend(CeedDestroy(&ceed)); 872 CeedCallBackend(CeedCalloc(1, &impl)); 873 CeedCallBackend(CeedVectorSetData(vec, impl)); 874 return CEED_ERROR_SUCCESS; 875 } 876 877 //------------------------------------------------------------------------------ 878