1 // Copyright (c) 2017-2024, 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 step, CeedSize length, CeedScalar val) { 340 for (CeedSize i = start; i < length; 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 step, CeedSize length, CeedScalar val); 348 349 //------------------------------------------------------------------------------ 350 // Set a vector to a value strided 351 //------------------------------------------------------------------------------ 352 static int CeedVectorSetValueStrided_Cuda(CeedVector vec, CeedSize start, 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 (impl->d_array) { 360 CeedCallBackend(CeedDeviceSetValueStrided_Cuda(impl->d_array, start, step, length, val)); 361 impl->h_array = NULL; 362 } else if (impl->h_array) { 363 CeedCallBackend(CeedHostSetValueStrided_Cuda(impl->h_array, start, step, length, val)); 364 impl->d_array = NULL; 365 } else { 366 return CeedError(CeedVectorReturnCeed(vec), CEED_ERROR_BACKEND, "CeedVector must have valid data set"); 367 } 368 return CEED_ERROR_SUCCESS; 369 } 370 371 //------------------------------------------------------------------------------ 372 // Vector Take Array 373 //------------------------------------------------------------------------------ 374 static int CeedVectorTakeArray_Cuda(CeedVector vec, CeedMemType mem_type, CeedScalar **array) { 375 CeedVector_Cuda *impl; 376 377 CeedCallBackend(CeedVectorGetData(vec, &impl)); 378 // Sync array to requested mem_type 379 CeedCallBackend(CeedVectorSyncArray(vec, mem_type)); 380 // Update pointer 381 switch (mem_type) { 382 case CEED_MEM_HOST: 383 (*array) = impl->h_array_borrowed; 384 impl->h_array_borrowed = NULL; 385 impl->h_array = NULL; 386 break; 387 case CEED_MEM_DEVICE: 388 (*array) = impl->d_array_borrowed; 389 impl->d_array_borrowed = NULL; 390 impl->d_array = NULL; 391 break; 392 } 393 return CEED_ERROR_SUCCESS; 394 } 395 396 //------------------------------------------------------------------------------ 397 // Core logic for array syncronization for GetArray. 398 // If a different memory type is most up to date, this will perform a copy 399 //------------------------------------------------------------------------------ 400 static int CeedVectorGetArrayCore_Cuda(const CeedVector vec, const CeedMemType mem_type, CeedScalar **array) { 401 CeedVector_Cuda *impl; 402 403 CeedCallBackend(CeedVectorGetData(vec, &impl)); 404 // Sync array to requested mem_type 405 CeedCallBackend(CeedVectorSyncArray(vec, mem_type)); 406 // Update pointer 407 switch (mem_type) { 408 case CEED_MEM_HOST: 409 *array = impl->h_array; 410 break; 411 case CEED_MEM_DEVICE: 412 *array = impl->d_array; 413 break; 414 } 415 return CEED_ERROR_SUCCESS; 416 } 417 418 //------------------------------------------------------------------------------ 419 // Get read-only access to a vector via the specified mem_type 420 //------------------------------------------------------------------------------ 421 static int CeedVectorGetArrayRead_Cuda(const CeedVector vec, const CeedMemType mem_type, const CeedScalar **array) { 422 return CeedVectorGetArrayCore_Cuda(vec, mem_type, (CeedScalar **)array); 423 } 424 425 //------------------------------------------------------------------------------ 426 // Get read/write access to a vector via the specified mem_type 427 //------------------------------------------------------------------------------ 428 static int CeedVectorGetArray_Cuda(const CeedVector vec, const CeedMemType mem_type, CeedScalar **array) { 429 CeedVector_Cuda *impl; 430 431 CeedCallBackend(CeedVectorGetData(vec, &impl)); 432 CeedCallBackend(CeedVectorGetArrayCore_Cuda(vec, mem_type, array)); 433 CeedCallBackend(CeedVectorSetAllInvalid_Cuda(vec)); 434 switch (mem_type) { 435 case CEED_MEM_HOST: 436 impl->h_array = *array; 437 break; 438 case CEED_MEM_DEVICE: 439 impl->d_array = *array; 440 break; 441 } 442 return CEED_ERROR_SUCCESS; 443 } 444 445 //------------------------------------------------------------------------------ 446 // Get write access to a vector via the specified mem_type 447 //------------------------------------------------------------------------------ 448 static int CeedVectorGetArrayWrite_Cuda(const CeedVector vec, const CeedMemType mem_type, CeedScalar **array) { 449 bool has_array_of_type = true; 450 CeedVector_Cuda *impl; 451 452 CeedCallBackend(CeedVectorGetData(vec, &impl)); 453 CeedCallBackend(CeedVectorHasArrayOfType_Cuda(vec, mem_type, &has_array_of_type)); 454 if (!has_array_of_type) { 455 // Allocate if array is not yet allocated 456 CeedCallBackend(CeedVectorSetArray(vec, mem_type, CEED_COPY_VALUES, NULL)); 457 } else { 458 // Select dirty array 459 switch (mem_type) { 460 case CEED_MEM_HOST: 461 if (impl->h_array_borrowed) impl->h_array = impl->h_array_borrowed; 462 else impl->h_array = impl->h_array_owned; 463 break; 464 case CEED_MEM_DEVICE: 465 if (impl->d_array_borrowed) impl->d_array = impl->d_array_borrowed; 466 else impl->d_array = impl->d_array_owned; 467 } 468 } 469 return CeedVectorGetArray_Cuda(vec, mem_type, array); 470 } 471 472 //------------------------------------------------------------------------------ 473 // Get the norm of a CeedVector 474 //------------------------------------------------------------------------------ 475 static int CeedVectorNorm_Cuda(CeedVector vec, CeedNormType type, CeedScalar *norm) { 476 Ceed ceed; 477 CeedSize length; 478 #if (CUDA_VERSION < 12000) 479 CeedSize num_calls; 480 #endif /* CUDA_VERSION */ 481 const CeedScalar *d_array; 482 CeedVector_Cuda *impl; 483 cublasHandle_t handle; 484 485 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 486 CeedCallBackend(CeedVectorGetData(vec, &impl)); 487 CeedCallBackend(CeedVectorGetLength(vec, &length)); 488 CeedCallBackend(CeedGetCublasHandle_Cuda(ceed, &handle)); 489 490 #if (CUDA_VERSION < 12000) 491 // With CUDA 12, we can use the 64-bit integer interface. Prior to that, 492 // we need to check if the vector is too long to handle with int32, 493 // and if so, divide it into subsections for repeated cuBLAS calls. 494 num_calls = length / INT_MAX; 495 if (length % INT_MAX > 0) num_calls += 1; 496 #endif /* CUDA_VERSION */ 497 498 // Compute norm 499 CeedCallBackend(CeedVectorGetArrayRead(vec, CEED_MEM_DEVICE, &d_array)); 500 switch (type) { 501 case CEED_NORM_1: { 502 *norm = 0.0; 503 #if defined(CEED_SCALAR_IS_FP32) 504 #if (CUDA_VERSION >= 12000) // We have CUDA 12, and can use 64-bit integers 505 CeedCallCublas(ceed, cublasSasum_64(handle, (int64_t)length, (float *)d_array, 1, (float *)norm)); 506 #else /* CUDA_VERSION */ 507 float sub_norm = 0.0; 508 float *d_array_start; 509 510 for (CeedInt i = 0; i < num_calls; i++) { 511 d_array_start = (float *)d_array + (CeedSize)(i)*INT_MAX; 512 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 513 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 514 515 CeedCallCublas(ceed, cublasSasum(handle, (CeedInt)sub_length, (float *)d_array_start, 1, &sub_norm)); 516 *norm += sub_norm; 517 } 518 #endif /* CUDA_VERSION */ 519 #else /* CEED_SCALAR */ 520 #if (CUDA_VERSION >= 12000) 521 CeedCallCublas(ceed, cublasDasum_64(handle, (int64_t)length, (double *)d_array, 1, (double *)norm)); 522 #else /* CUDA_VERSION */ 523 double sub_norm = 0.0; 524 double *d_array_start; 525 526 for (CeedInt i = 0; i < num_calls; i++) { 527 d_array_start = (double *)d_array + (CeedSize)(i)*INT_MAX; 528 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 529 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 530 531 CeedCallCublas(ceed, cublasDasum(handle, (CeedInt)sub_length, (double *)d_array_start, 1, &sub_norm)); 532 *norm += sub_norm; 533 } 534 #endif /* CUDA_VERSION */ 535 #endif /* CEED_SCALAR */ 536 break; 537 } 538 case CEED_NORM_2: { 539 #if defined(CEED_SCALAR_IS_FP32) 540 #if (CUDA_VERSION >= 12000) 541 CeedCallCublas(ceed, cublasSnrm2_64(handle, (int64_t)length, (float *)d_array, 1, (float *)norm)); 542 #else /* CUDA_VERSION */ 543 float sub_norm = 0.0, norm_sum = 0.0; 544 float *d_array_start; 545 546 for (CeedInt i = 0; i < num_calls; i++) { 547 d_array_start = (float *)d_array + (CeedSize)(i)*INT_MAX; 548 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 549 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 550 551 CeedCallCublas(ceed, cublasSnrm2(handle, (CeedInt)sub_length, (float *)d_array_start, 1, &sub_norm)); 552 norm_sum += sub_norm * sub_norm; 553 } 554 *norm = sqrt(norm_sum); 555 #endif /* CUDA_VERSION */ 556 #else /* CEED_SCALAR */ 557 #if (CUDA_VERSION >= 12000) 558 CeedCallCublas(ceed, cublasDnrm2_64(handle, (int64_t)length, (double *)d_array, 1, (double *)norm)); 559 #else /* CUDA_VERSION */ 560 double sub_norm = 0.0, norm_sum = 0.0; 561 double *d_array_start; 562 563 for (CeedInt i = 0; i < num_calls; i++) { 564 d_array_start = (double *)d_array + (CeedSize)(i)*INT_MAX; 565 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 566 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 567 568 CeedCallCublas(ceed, cublasDnrm2(handle, (CeedInt)sub_length, (double *)d_array_start, 1, &sub_norm)); 569 norm_sum += sub_norm * sub_norm; 570 } 571 *norm = sqrt(norm_sum); 572 #endif /* CUDA_VERSION */ 573 #endif /* CEED_SCALAR */ 574 break; 575 } 576 case CEED_NORM_MAX: { 577 #if defined(CEED_SCALAR_IS_FP32) 578 #if (CUDA_VERSION >= 12000) 579 int64_t index; 580 CeedScalar norm_no_abs; 581 582 CeedCallCublas(ceed, cublasIsamax_64(handle, (int64_t)length, (float *)d_array, 1, &index)); 583 CeedCallCuda(ceed, cudaMemcpy(&norm_no_abs, impl->d_array + index - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 584 *norm = fabs(norm_no_abs); 585 #else /* CUDA_VERSION */ 586 CeedInt index; 587 float sub_max = 0.0, current_max = 0.0; 588 float *d_array_start; 589 590 for (CeedInt i = 0; i < num_calls; i++) { 591 d_array_start = (float *)d_array + (CeedSize)(i)*INT_MAX; 592 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 593 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 594 595 CeedCallCublas(ceed, cublasIsamax(handle, (CeedInt)sub_length, (float *)d_array_start, 1, &index)); 596 CeedCallCuda(ceed, cudaMemcpy(&sub_max, d_array_start + index - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 597 if (fabs(sub_max) > current_max) current_max = fabs(sub_max); 598 } 599 *norm = current_max; 600 #endif /* CUDA_VERSION */ 601 #else /* CEED_SCALAR */ 602 #if (CUDA_VERSION >= 12000) 603 int64_t index; 604 CeedScalar norm_no_abs; 605 606 CeedCallCublas(ceed, cublasIdamax_64(handle, (int64_t)length, (double *)d_array, 1, &index)); 607 CeedCallCuda(ceed, cudaMemcpy(&norm_no_abs, impl->d_array + index - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 608 *norm = fabs(norm_no_abs); 609 #else /* CUDA_VERSION */ 610 CeedInt index; 611 double sub_max = 0.0, current_max = 0.0; 612 double *d_array_start; 613 614 for (CeedInt i = 0; i < num_calls; i++) { 615 d_array_start = (double *)d_array + (CeedSize)(i)*INT_MAX; 616 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 617 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 618 619 CeedCallCublas(ceed, cublasIdamax(handle, (CeedInt)sub_length, (double *)d_array_start, 1, &index)); 620 CeedCallCuda(ceed, cudaMemcpy(&sub_max, d_array_start + index - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 621 if (fabs(sub_max) > current_max) current_max = fabs(sub_max); 622 } 623 *norm = current_max; 624 #endif /* CUDA_VERSION */ 625 #endif /* CEED_SCALAR */ 626 break; 627 } 628 } 629 CeedCallBackend(CeedVectorRestoreArrayRead(vec, &d_array)); 630 CeedCallBackend(CeedDestroy(&ceed)); 631 return CEED_ERROR_SUCCESS; 632 } 633 634 //------------------------------------------------------------------------------ 635 // Take reciprocal of a vector on host 636 //------------------------------------------------------------------------------ 637 static int CeedHostReciprocal_Cuda(CeedScalar *h_array, CeedSize length) { 638 for (CeedSize i = 0; i < length; i++) { 639 if (fabs(h_array[i]) > CEED_EPSILON) h_array[i] = 1. / h_array[i]; 640 } 641 return CEED_ERROR_SUCCESS; 642 } 643 644 //------------------------------------------------------------------------------ 645 // Take reciprocal of a vector on device (impl in .cu file) 646 //------------------------------------------------------------------------------ 647 int CeedDeviceReciprocal_Cuda(CeedScalar *d_array, CeedSize length); 648 649 //------------------------------------------------------------------------------ 650 // Take reciprocal of a vector 651 //------------------------------------------------------------------------------ 652 static int CeedVectorReciprocal_Cuda(CeedVector vec) { 653 CeedSize length; 654 CeedVector_Cuda *impl; 655 656 CeedCallBackend(CeedVectorGetData(vec, &impl)); 657 CeedCallBackend(CeedVectorGetLength(vec, &length)); 658 // Set value for synced device/host array 659 if (impl->d_array) CeedCallBackend(CeedDeviceReciprocal_Cuda(impl->d_array, length)); 660 if (impl->h_array) CeedCallBackend(CeedHostReciprocal_Cuda(impl->h_array, length)); 661 return CEED_ERROR_SUCCESS; 662 } 663 664 //------------------------------------------------------------------------------ 665 // Compute x = alpha x on the host 666 //------------------------------------------------------------------------------ 667 static int CeedHostScale_Cuda(CeedScalar *x_array, CeedScalar alpha, CeedSize length) { 668 for (CeedSize i = 0; i < length; i++) x_array[i] *= alpha; 669 return CEED_ERROR_SUCCESS; 670 } 671 672 //------------------------------------------------------------------------------ 673 // Compute x = alpha x on device (impl in .cu file) 674 //------------------------------------------------------------------------------ 675 int CeedDeviceScale_Cuda(CeedScalar *x_array, CeedScalar alpha, CeedSize length); 676 677 //------------------------------------------------------------------------------ 678 // Compute x = alpha x 679 //------------------------------------------------------------------------------ 680 static int CeedVectorScale_Cuda(CeedVector x, CeedScalar alpha) { 681 CeedSize length; 682 CeedVector_Cuda *impl; 683 684 CeedCallBackend(CeedVectorGetData(x, &impl)); 685 CeedCallBackend(CeedVectorGetLength(x, &length)); 686 // Set value for synced device/host array 687 if (impl->d_array) { 688 #if (CUDA_VERSION >= 12000) 689 cublasHandle_t handle; 690 691 CeedCallBackend(CeedGetCublasHandle_Cuda(CeedVectorReturnCeed(x), &handle)); 692 #if defined(CEED_SCALAR_IS_FP32) 693 CeedCallCublas(CeedVectorReturnCeed(x), cublasSscal_64(handle, (int64_t)length, &alpha, impl->d_array, 1)); 694 #else /* CEED_SCALAR */ 695 CeedCallCublas(CeedVectorReturnCeed(x), cublasDscal_64(handle, (int64_t)length, &alpha, impl->d_array, 1)); 696 #endif /* CEED_SCALAR */ 697 #else /* CUDA_VERSION */ 698 CeedCallBackend(CeedDeviceScale_Cuda(impl->d_array, alpha, length)); 699 #endif /* CUDA_VERSION */ 700 impl->h_array = NULL; 701 } else if (impl->h_array) { 702 CeedCallBackend(CeedHostScale_Cuda(impl->h_array, alpha, length)); 703 impl->d_array = NULL; 704 } 705 return CEED_ERROR_SUCCESS; 706 } 707 708 //------------------------------------------------------------------------------ 709 // Compute y = alpha x + y on the host 710 //------------------------------------------------------------------------------ 711 static int CeedHostAXPY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar *x_array, CeedSize length) { 712 for (CeedSize i = 0; i < length; i++) y_array[i] += alpha * x_array[i]; 713 return CEED_ERROR_SUCCESS; 714 } 715 716 //------------------------------------------------------------------------------ 717 // Compute y = alpha x + y on device (impl in .cu file) 718 //------------------------------------------------------------------------------ 719 int CeedDeviceAXPY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar *x_array, CeedSize length); 720 721 //------------------------------------------------------------------------------ 722 // Compute y = alpha x + y 723 //------------------------------------------------------------------------------ 724 static int CeedVectorAXPY_Cuda(CeedVector y, CeedScalar alpha, CeedVector x) { 725 CeedSize length; 726 CeedVector_Cuda *y_impl, *x_impl; 727 728 CeedCallBackend(CeedVectorGetData(y, &y_impl)); 729 CeedCallBackend(CeedVectorGetData(x, &x_impl)); 730 CeedCallBackend(CeedVectorGetLength(y, &length)); 731 // Set value for synced device/host array 732 if (y_impl->d_array) { 733 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_DEVICE)); 734 #if (CUDA_VERSION >= 12000) 735 cublasHandle_t handle; 736 737 CeedCallBackend(CeedGetCublasHandle_Cuda(CeedVectorReturnCeed(y), &handle)); 738 #if defined(CEED_SCALAR_IS_FP32) 739 CeedCallCublas(CeedVectorReturnCeed(y), cublasSaxpy_64(handle, (int64_t)length, &alpha, x_impl->d_array, 1, y_impl->d_array, 1)); 740 #else /* CEED_SCALAR */ 741 CeedCallCublas(CeedVectorReturnCeed(y), cublasDaxpy_64(handle, (int64_t)length, &alpha, x_impl->d_array, 1, y_impl->d_array, 1)); 742 #endif /* CEED_SCALAR */ 743 #else /* CUDA_VERSION */ 744 CeedCallBackend(CeedDeviceAXPY_Cuda(y_impl->d_array, alpha, x_impl->d_array, length)); 745 #endif /* CUDA_VERSION */ 746 y_impl->h_array = NULL; 747 } else if (y_impl->h_array) { 748 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_HOST)); 749 CeedCallBackend(CeedHostAXPY_Cuda(y_impl->h_array, alpha, x_impl->h_array, length)); 750 y_impl->d_array = NULL; 751 } 752 return CEED_ERROR_SUCCESS; 753 } 754 755 //------------------------------------------------------------------------------ 756 // Compute y = alpha x + beta y on the host 757 //------------------------------------------------------------------------------ 758 static int CeedHostAXPBY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar beta, CeedScalar *x_array, CeedSize length) { 759 for (CeedSize i = 0; i < length; i++) y_array[i] = alpha * x_array[i] + beta * y_array[i]; 760 return CEED_ERROR_SUCCESS; 761 } 762 763 //------------------------------------------------------------------------------ 764 // Compute y = alpha x + beta y on device (impl in .cu file) 765 //------------------------------------------------------------------------------ 766 int CeedDeviceAXPBY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar beta, CeedScalar *x_array, CeedSize length); 767 768 //------------------------------------------------------------------------------ 769 // Compute y = alpha x + beta y 770 //------------------------------------------------------------------------------ 771 static int CeedVectorAXPBY_Cuda(CeedVector y, CeedScalar alpha, CeedScalar beta, CeedVector x) { 772 CeedSize length; 773 CeedVector_Cuda *y_impl, *x_impl; 774 775 CeedCallBackend(CeedVectorGetData(y, &y_impl)); 776 CeedCallBackend(CeedVectorGetData(x, &x_impl)); 777 CeedCallBackend(CeedVectorGetLength(y, &length)); 778 // Set value for synced device/host array 779 if (y_impl->d_array) { 780 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_DEVICE)); 781 CeedCallBackend(CeedDeviceAXPBY_Cuda(y_impl->d_array, alpha, beta, x_impl->d_array, length)); 782 } 783 if (y_impl->h_array) { 784 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_HOST)); 785 CeedCallBackend(CeedHostAXPBY_Cuda(y_impl->h_array, alpha, beta, x_impl->h_array, length)); 786 } 787 return CEED_ERROR_SUCCESS; 788 } 789 790 //------------------------------------------------------------------------------ 791 // Compute the pointwise multiplication w = x .* y on the host 792 //------------------------------------------------------------------------------ 793 static int CeedHostPointwiseMult_Cuda(CeedScalar *w_array, CeedScalar *x_array, CeedScalar *y_array, CeedSize length) { 794 for (CeedSize i = 0; i < length; i++) w_array[i] = x_array[i] * y_array[i]; 795 return CEED_ERROR_SUCCESS; 796 } 797 798 //------------------------------------------------------------------------------ 799 // Compute the pointwise multiplication w = x .* y on device (impl in .cu file) 800 //------------------------------------------------------------------------------ 801 int CeedDevicePointwiseMult_Cuda(CeedScalar *w_array, CeedScalar *x_array, CeedScalar *y_array, CeedSize length); 802 803 //------------------------------------------------------------------------------ 804 // Compute the pointwise multiplication w = x .* y 805 //------------------------------------------------------------------------------ 806 static int CeedVectorPointwiseMult_Cuda(CeedVector w, CeedVector x, CeedVector y) { 807 CeedSize length; 808 CeedVector_Cuda *w_impl, *x_impl, *y_impl; 809 810 CeedCallBackend(CeedVectorGetData(w, &w_impl)); 811 CeedCallBackend(CeedVectorGetData(x, &x_impl)); 812 CeedCallBackend(CeedVectorGetData(y, &y_impl)); 813 CeedCallBackend(CeedVectorGetLength(w, &length)); 814 // Set value for synced device/host array 815 if (!w_impl->d_array && !w_impl->h_array) { 816 CeedCallBackend(CeedVectorSetValue(w, 0.0)); 817 } 818 if (w_impl->d_array) { 819 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_DEVICE)); 820 CeedCallBackend(CeedVectorSyncArray(y, CEED_MEM_DEVICE)); 821 CeedCallBackend(CeedDevicePointwiseMult_Cuda(w_impl->d_array, x_impl->d_array, y_impl->d_array, length)); 822 } 823 if (w_impl->h_array) { 824 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_HOST)); 825 CeedCallBackend(CeedVectorSyncArray(y, CEED_MEM_HOST)); 826 CeedCallBackend(CeedHostPointwiseMult_Cuda(w_impl->h_array, x_impl->h_array, y_impl->h_array, length)); 827 } 828 return CEED_ERROR_SUCCESS; 829 } 830 831 //------------------------------------------------------------------------------ 832 // Destroy the vector 833 //------------------------------------------------------------------------------ 834 static int CeedVectorDestroy_Cuda(const CeedVector vec) { 835 CeedVector_Cuda *impl; 836 837 CeedCallBackend(CeedVectorGetData(vec, &impl)); 838 CeedCallCuda(CeedVectorReturnCeed(vec), cudaFree(impl->d_array_owned)); 839 CeedCallBackend(CeedFree(&impl->h_array_owned)); 840 CeedCallBackend(CeedFree(&impl)); 841 return CEED_ERROR_SUCCESS; 842 } 843 844 //------------------------------------------------------------------------------ 845 // Create a vector of the specified length (does not allocate memory) 846 //------------------------------------------------------------------------------ 847 int CeedVectorCreate_Cuda(CeedSize n, CeedVector vec) { 848 CeedVector_Cuda *impl; 849 Ceed ceed; 850 851 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 852 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "HasValidArray", CeedVectorHasValidArray_Cuda)); 853 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "HasBorrowedArrayOfType", CeedVectorHasBorrowedArrayOfType_Cuda)); 854 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "SetArray", CeedVectorSetArray_Cuda)); 855 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "TakeArray", CeedVectorTakeArray_Cuda)); 856 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "CopyStrided", CeedVectorCopyStrided_Cuda)); 857 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "SetValue", CeedVectorSetValue_Cuda)); 858 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "SetValueStrided", CeedVectorSetValueStrided_Cuda)); 859 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "SyncArray", CeedVectorSyncArray_Cuda)); 860 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "GetArray", CeedVectorGetArray_Cuda)); 861 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "GetArrayRead", CeedVectorGetArrayRead_Cuda)); 862 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "GetArrayWrite", CeedVectorGetArrayWrite_Cuda)); 863 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Norm", CeedVectorNorm_Cuda)); 864 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Reciprocal", CeedVectorReciprocal_Cuda)); 865 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Scale", CeedVectorScale_Cuda)); 866 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "AXPY", CeedVectorAXPY_Cuda)); 867 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "AXPBY", CeedVectorAXPBY_Cuda)); 868 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "PointwiseMult", CeedVectorPointwiseMult_Cuda)); 869 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Destroy", CeedVectorDestroy_Cuda)); 870 CeedCallBackend(CeedDestroy(&ceed)); 871 CeedCallBackend(CeedCalloc(1, &impl)); 872 CeedCallBackend(CeedVectorSetData(vec, impl)); 873 return CEED_ERROR_SUCCESS; 874 } 875 876 //------------------------------------------------------------------------------ 877