1 // Copyright (c) 2017-2022, 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 Ceed ceed; 43 CeedSize length; 44 size_t bytes; 45 CeedVector_Cuda *impl; 46 47 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 48 CeedCallBackend(CeedVectorGetData(vec, &impl)); 49 50 CeedCheck(impl->h_array, ceed, CEED_ERROR_BACKEND, "No valid host data to sync to device"); 51 52 CeedCallBackend(CeedVectorGetLength(vec, &length)); 53 bytes = length * sizeof(CeedScalar); 54 if (impl->d_array_borrowed) { 55 impl->d_array = impl->d_array_borrowed; 56 } else if (impl->d_array_owned) { 57 impl->d_array = impl->d_array_owned; 58 } else { 59 CeedCallCuda(ceed, cudaMalloc((void **)&impl->d_array_owned, bytes)); 60 impl->d_array = impl->d_array_owned; 61 } 62 CeedCallCuda(ceed, cudaMemcpy(impl->d_array, impl->h_array, bytes, cudaMemcpyHostToDevice)); 63 return CEED_ERROR_SUCCESS; 64 } 65 66 //------------------------------------------------------------------------------ 67 // Sync device to host 68 //------------------------------------------------------------------------------ 69 static inline int CeedVectorSyncD2H_Cuda(const CeedVector vec) { 70 Ceed ceed; 71 CeedSize length; 72 CeedVector_Cuda *impl; 73 74 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 75 CeedCallBackend(CeedVectorGetData(vec, &impl)); 76 77 CeedCheck(impl->d_array, ceed, CEED_ERROR_BACKEND, "No valid device data to sync to host"); 78 79 if (impl->h_array_borrowed) { 80 impl->h_array = impl->h_array_borrowed; 81 } else if (impl->h_array_owned) { 82 impl->h_array = impl->h_array_owned; 83 } else { 84 CeedSize length; 85 86 CeedCallBackend(CeedVectorGetLength(vec, &length)); 87 CeedCallBackend(CeedCalloc(length, &impl->h_array_owned)); 88 impl->h_array = impl->h_array_owned; 89 } 90 91 CeedCallBackend(CeedVectorGetLength(vec, &length)); 92 size_t bytes = length * sizeof(CeedScalar); 93 94 CeedCallCuda(ceed, cudaMemcpy(impl->h_array, impl->d_array, bytes, cudaMemcpyDeviceToHost)); 95 return CEED_ERROR_SUCCESS; 96 } 97 98 //------------------------------------------------------------------------------ 99 // Sync arrays 100 //------------------------------------------------------------------------------ 101 static int CeedVectorSyncArray_Cuda(const CeedVector vec, CeedMemType mem_type) { 102 bool need_sync = false; 103 104 // Check whether device/host sync is needed 105 CeedCallBackend(CeedVectorNeedSync_Cuda(vec, mem_type, &need_sync)); 106 if (!need_sync) return CEED_ERROR_SUCCESS; 107 108 switch (mem_type) { 109 case CEED_MEM_HOST: 110 return CeedVectorSyncD2H_Cuda(vec); 111 case CEED_MEM_DEVICE: 112 return CeedVectorSyncH2D_Cuda(vec); 113 } 114 return CEED_ERROR_UNSUPPORTED; 115 } 116 117 //------------------------------------------------------------------------------ 118 // Set all pointers as invalid 119 //------------------------------------------------------------------------------ 120 static inline int CeedVectorSetAllInvalid_Cuda(const CeedVector vec) { 121 CeedVector_Cuda *impl; 122 123 CeedCallBackend(CeedVectorGetData(vec, &impl)); 124 impl->h_array = NULL; 125 impl->d_array = NULL; 126 return CEED_ERROR_SUCCESS; 127 } 128 129 //------------------------------------------------------------------------------ 130 // Check if CeedVector has any valid pointer 131 //------------------------------------------------------------------------------ 132 static inline int CeedVectorHasValidArray_Cuda(const CeedVector vec, bool *has_valid_array) { 133 CeedVector_Cuda *impl; 134 135 CeedCallBackend(CeedVectorGetData(vec, &impl)); 136 *has_valid_array = impl->h_array || impl->d_array; 137 return CEED_ERROR_SUCCESS; 138 } 139 140 //------------------------------------------------------------------------------ 141 // Check if has array of given type 142 //------------------------------------------------------------------------------ 143 static inline int CeedVectorHasArrayOfType_Cuda(const CeedVector vec, CeedMemType mem_type, bool *has_array_of_type) { 144 CeedVector_Cuda *impl; 145 146 CeedCallBackend(CeedVectorGetData(vec, &impl)); 147 switch (mem_type) { 148 case CEED_MEM_HOST: 149 *has_array_of_type = impl->h_array_borrowed || impl->h_array_owned; 150 break; 151 case CEED_MEM_DEVICE: 152 *has_array_of_type = impl->d_array_borrowed || impl->d_array_owned; 153 break; 154 } 155 return CEED_ERROR_SUCCESS; 156 } 157 158 //------------------------------------------------------------------------------ 159 // Check if has borrowed array of given type 160 //------------------------------------------------------------------------------ 161 static inline int CeedVectorHasBorrowedArrayOfType_Cuda(const CeedVector vec, CeedMemType mem_type, bool *has_borrowed_array_of_type) { 162 CeedVector_Cuda *impl; 163 164 CeedCallBackend(CeedVectorGetData(vec, &impl)); 165 switch (mem_type) { 166 case CEED_MEM_HOST: 167 *has_borrowed_array_of_type = impl->h_array_borrowed; 168 break; 169 case CEED_MEM_DEVICE: 170 *has_borrowed_array_of_type = impl->d_array_borrowed; 171 break; 172 } 173 return CEED_ERROR_SUCCESS; 174 } 175 176 //------------------------------------------------------------------------------ 177 // Set array from host 178 //------------------------------------------------------------------------------ 179 static int CeedVectorSetArrayHost_Cuda(const CeedVector vec, const CeedCopyMode copy_mode, CeedScalar *array) { 180 CeedVector_Cuda *impl; 181 182 CeedCallBackend(CeedVectorGetData(vec, &impl)); 183 switch (copy_mode) { 184 case CEED_COPY_VALUES: { 185 if (!impl->h_array_owned) { 186 CeedSize length; 187 188 CeedCallBackend(CeedVectorGetLength(vec, &length)); 189 CeedCallBackend(CeedMalloc(length, &impl->h_array_owned)); 190 } 191 impl->h_array_borrowed = NULL; 192 impl->h_array = impl->h_array_owned; 193 if (array) { 194 CeedSize length; 195 size_t bytes; 196 197 CeedCallBackend(CeedVectorGetLength(vec, &length)); 198 bytes = length * sizeof(CeedScalar); 199 memcpy(impl->h_array, array, bytes); 200 } 201 } break; 202 case CEED_OWN_POINTER: 203 CeedCallBackend(CeedFree(&impl->h_array_owned)); 204 impl->h_array_owned = array; 205 impl->h_array_borrowed = NULL; 206 impl->h_array = array; 207 break; 208 case CEED_USE_POINTER: 209 CeedCallBackend(CeedFree(&impl->h_array_owned)); 210 impl->h_array_borrowed = array; 211 impl->h_array = array; 212 break; 213 } 214 return CEED_ERROR_SUCCESS; 215 } 216 217 //------------------------------------------------------------------------------ 218 // Set array from device 219 //------------------------------------------------------------------------------ 220 static int CeedVectorSetArrayDevice_Cuda(const CeedVector vec, const CeedCopyMode copy_mode, CeedScalar *array) { 221 Ceed ceed; 222 CeedVector_Cuda *impl; 223 224 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 225 CeedCallBackend(CeedVectorGetData(vec, &impl)); 226 switch (copy_mode) { 227 case CEED_COPY_VALUES: { 228 CeedSize length; 229 size_t bytes; 230 231 CeedCallBackend(CeedVectorGetLength(vec, &length)); 232 bytes = length * sizeof(CeedScalar); 233 if (!impl->d_array_owned) { 234 CeedCallCuda(ceed, cudaMalloc((void **)&impl->d_array_owned, bytes)); 235 } 236 impl->d_array_borrowed = NULL; 237 impl->d_array = impl->d_array_owned; 238 if (array) CeedCallCuda(ceed, cudaMemcpy(impl->d_array, array, bytes, cudaMemcpyDeviceToDevice)); 239 } break; 240 case CEED_OWN_POINTER: 241 CeedCallCuda(ceed, cudaFree(impl->d_array_owned)); 242 impl->d_array_owned = array; 243 impl->d_array_borrowed = NULL; 244 impl->d_array = array; 245 break; 246 case CEED_USE_POINTER: 247 CeedCallCuda(ceed, cudaFree(impl->d_array_owned)); 248 impl->d_array_owned = NULL; 249 impl->d_array_borrowed = array; 250 impl->d_array = array; 251 break; 252 } 253 return CEED_ERROR_SUCCESS; 254 } 255 256 //------------------------------------------------------------------------------ 257 // Set the array used by a vector, 258 // freeing any previously allocated array if applicable 259 //------------------------------------------------------------------------------ 260 static int CeedVectorSetArray_Cuda(const CeedVector vec, const CeedMemType mem_type, const CeedCopyMode copy_mode, CeedScalar *array) { 261 Ceed ceed; 262 CeedVector_Cuda *impl; 263 264 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 265 CeedCallBackend(CeedVectorGetData(vec, &impl)); 266 CeedCallBackend(CeedVectorSetAllInvalid_Cuda(vec)); 267 switch (mem_type) { 268 case CEED_MEM_HOST: 269 return CeedVectorSetArrayHost_Cuda(vec, copy_mode, array); 270 case CEED_MEM_DEVICE: 271 return CeedVectorSetArrayDevice_Cuda(vec, copy_mode, array); 272 } 273 return CEED_ERROR_UNSUPPORTED; 274 } 275 276 //------------------------------------------------------------------------------ 277 // Set host array to value 278 //------------------------------------------------------------------------------ 279 static int CeedHostSetValue_Cuda(CeedScalar *h_array, CeedSize length, CeedScalar val) { 280 for (CeedSize i = 0; i < length; i++) h_array[i] = val; 281 return CEED_ERROR_SUCCESS; 282 } 283 284 //------------------------------------------------------------------------------ 285 // Set device array to value (impl in .cu file) 286 //------------------------------------------------------------------------------ 287 int CeedDeviceSetValue_Cuda(CeedScalar *d_array, CeedSize length, CeedScalar val); 288 289 //------------------------------------------------------------------------------ 290 // Set a vector to a value 291 //------------------------------------------------------------------------------ 292 static int CeedVectorSetValue_Cuda(CeedVector vec, CeedScalar val) { 293 Ceed ceed; 294 CeedSize length; 295 CeedVector_Cuda *impl; 296 297 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 298 CeedCallBackend(CeedVectorGetData(vec, &impl)); 299 CeedCallBackend(CeedVectorGetLength(vec, &length)); 300 // Set value for synced device/host array 301 if (!impl->d_array && !impl->h_array) { 302 if (impl->d_array_borrowed) { 303 impl->d_array = impl->d_array_borrowed; 304 } else if (impl->h_array_borrowed) { 305 impl->h_array = impl->h_array_borrowed; 306 } else if (impl->d_array_owned) { 307 impl->d_array = impl->d_array_owned; 308 } else if (impl->h_array_owned) { 309 impl->h_array = impl->h_array_owned; 310 } else { 311 CeedCallBackend(CeedVectorSetArray(vec, CEED_MEM_DEVICE, CEED_COPY_VALUES, NULL)); 312 } 313 } 314 if (impl->d_array) { 315 CeedCallBackend(CeedDeviceSetValue_Cuda(impl->d_array, length, val)); 316 impl->h_array = NULL; 317 } 318 if (impl->h_array) { 319 CeedCallBackend(CeedHostSetValue_Cuda(impl->h_array, length, val)); 320 impl->d_array = NULL; 321 } 322 return CEED_ERROR_SUCCESS; 323 } 324 325 //------------------------------------------------------------------------------ 326 // Vector Take Array 327 //------------------------------------------------------------------------------ 328 static int CeedVectorTakeArray_Cuda(CeedVector vec, CeedMemType mem_type, CeedScalar **array) { 329 Ceed ceed; 330 CeedVector_Cuda *impl; 331 332 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 333 CeedCallBackend(CeedVectorGetData(vec, &impl)); 334 // Sync array to requested mem_type 335 CeedCallBackend(CeedVectorSyncArray(vec, mem_type)); 336 // Update pointer 337 switch (mem_type) { 338 case CEED_MEM_HOST: 339 (*array) = impl->h_array_borrowed; 340 impl->h_array_borrowed = NULL; 341 impl->h_array = NULL; 342 break; 343 case CEED_MEM_DEVICE: 344 (*array) = impl->d_array_borrowed; 345 impl->d_array_borrowed = NULL; 346 impl->d_array = NULL; 347 break; 348 } 349 return CEED_ERROR_SUCCESS; 350 } 351 352 //------------------------------------------------------------------------------ 353 // Core logic for array syncronization for GetArray. 354 // If a different memory type is most up to date, this will perform a copy 355 //------------------------------------------------------------------------------ 356 static int CeedVectorGetArrayCore_Cuda(const CeedVector vec, const CeedMemType mem_type, CeedScalar **array) { 357 Ceed ceed; 358 CeedVector_Cuda *impl; 359 360 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 361 CeedCallBackend(CeedVectorGetData(vec, &impl)); 362 // Sync array to requested mem_type 363 CeedCallBackend(CeedVectorSyncArray(vec, mem_type)); 364 // Update pointer 365 switch (mem_type) { 366 case CEED_MEM_HOST: 367 *array = impl->h_array; 368 break; 369 case CEED_MEM_DEVICE: 370 *array = impl->d_array; 371 break; 372 } 373 return CEED_ERROR_SUCCESS; 374 } 375 376 //------------------------------------------------------------------------------ 377 // Get read-only access to a vector via the specified mem_type 378 //------------------------------------------------------------------------------ 379 static int CeedVectorGetArrayRead_Cuda(const CeedVector vec, const CeedMemType mem_type, const CeedScalar **array) { 380 return CeedVectorGetArrayCore_Cuda(vec, mem_type, (CeedScalar **)array); 381 } 382 383 //------------------------------------------------------------------------------ 384 // Get read/write access to a vector via the specified mem_type 385 //------------------------------------------------------------------------------ 386 static int CeedVectorGetArray_Cuda(const CeedVector vec, const CeedMemType mem_type, CeedScalar **array) { 387 CeedVector_Cuda *impl; 388 389 CeedCallBackend(CeedVectorGetData(vec, &impl)); 390 CeedCallBackend(CeedVectorGetArrayCore_Cuda(vec, mem_type, array)); 391 CeedCallBackend(CeedVectorSetAllInvalid_Cuda(vec)); 392 switch (mem_type) { 393 case CEED_MEM_HOST: 394 impl->h_array = *array; 395 break; 396 case CEED_MEM_DEVICE: 397 impl->d_array = *array; 398 break; 399 } 400 return CEED_ERROR_SUCCESS; 401 } 402 403 //------------------------------------------------------------------------------ 404 // Get write access to a vector via the specified mem_type 405 //------------------------------------------------------------------------------ 406 static int CeedVectorGetArrayWrite_Cuda(const CeedVector vec, const CeedMemType mem_type, CeedScalar **array) { 407 bool has_array_of_type = true; 408 CeedVector_Cuda *impl; 409 410 CeedCallBackend(CeedVectorGetData(vec, &impl)); 411 CeedCallBackend(CeedVectorHasArrayOfType_Cuda(vec, mem_type, &has_array_of_type)); 412 if (!has_array_of_type) { 413 // Allocate if array is not yet allocated 414 CeedCallBackend(CeedVectorSetArray(vec, mem_type, CEED_COPY_VALUES, NULL)); 415 } else { 416 // Select dirty array 417 switch (mem_type) { 418 case CEED_MEM_HOST: 419 if (impl->h_array_borrowed) impl->h_array = impl->h_array_borrowed; 420 else impl->h_array = impl->h_array_owned; 421 break; 422 case CEED_MEM_DEVICE: 423 if (impl->d_array_borrowed) impl->d_array = impl->d_array_borrowed; 424 else impl->d_array = impl->d_array_owned; 425 } 426 } 427 return CeedVectorGetArray_Cuda(vec, mem_type, array); 428 } 429 430 //------------------------------------------------------------------------------ 431 // Get the norm of a CeedVector 432 //------------------------------------------------------------------------------ 433 static int CeedVectorNorm_Cuda(CeedVector vec, CeedNormType type, CeedScalar *norm) { 434 Ceed ceed; 435 CeedSize length; 436 #if CUDA_VERSION < 12000 437 CeedSize num_calls; 438 #endif 439 const CeedScalar *d_array; 440 CeedVector_Cuda *impl; 441 cublasHandle_t handle; 442 443 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 444 CeedCallBackend(CeedVectorGetData(vec, &impl)); 445 CeedCallBackend(CeedVectorGetLength(vec, &length)); 446 CeedCallBackend(CeedGetCublasHandle_Cuda(ceed, &handle)); 447 448 #if CUDA_VERSION < 12000 449 // With CUDA 12, we can use the 64-bit integer interface. Prior to that, 450 // we need to check if the vector is too long to handle with int32, 451 // and if so, divide it into subsections for repeated cuBLAS calls. 452 num_calls = length / INT_MAX; 453 if (length % INT_MAX > 0) num_calls += 1; 454 #endif 455 456 // Compute norm 457 CeedCallBackend(CeedVectorGetArrayRead(vec, CEED_MEM_DEVICE, &d_array)); 458 switch (type) { 459 case CEED_NORM_1: { 460 *norm = 0.0; 461 if (CEED_SCALAR_TYPE == CEED_SCALAR_FP32) { 462 #if CUDA_VERSION >= 12000 // We have CUDA 12, and can use 64-bit integers 463 CeedCallCublas(ceed, cublasSasum_64(handle, (int64_t)length, (float *)d_array, 1, (float *)norm)); 464 #else 465 float sub_norm = 0.0; 466 float *d_array_start; 467 468 for (CeedInt i = 0; i < num_calls; i++) { 469 d_array_start = (float *)d_array + (CeedSize)(i)*INT_MAX; 470 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 471 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 472 473 CeedCallCublas(ceed, cublasSasum(handle, (CeedInt)sub_length, (float *)d_array_start, 1, &sub_norm)); 474 *norm += sub_norm; 475 } 476 #endif 477 } else { 478 #if CUDA_VERSION >= 12000 479 CeedCallCublas(ceed, cublasDasum_64(handle, (int64_t)length, (double *)d_array, 1, (double *)norm)); 480 #else 481 double sub_norm = 0.0; 482 double *d_array_start; 483 484 for (CeedInt i = 0; i < num_calls; i++) { 485 d_array_start = (double *)d_array + (CeedSize)(i)*INT_MAX; 486 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 487 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 488 489 CeedCallCublas(ceed, cublasDasum(handle, (CeedInt)sub_length, (double *)d_array_start, 1, &sub_norm)); 490 *norm += sub_norm; 491 } 492 #endif 493 } 494 break; 495 } 496 case CEED_NORM_2: { 497 if (CEED_SCALAR_TYPE == CEED_SCALAR_FP32) { 498 #if CUDA_VERSION >= 12000 499 CeedCallCublas(ceed, cublasSnrm2_64(handle, (int64_t)length, (float *)d_array, 1, (float *)norm)); 500 #else 501 float sub_norm = 0.0, norm_sum = 0.0; 502 float *d_array_start; 503 504 for (CeedInt i = 0; i < num_calls; i++) { 505 d_array_start = (float *)d_array + (CeedSize)(i)*INT_MAX; 506 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 507 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 508 509 CeedCallCublas(ceed, cublasSnrm2(handle, (CeedInt)sub_length, (float *)d_array_start, 1, &sub_norm)); 510 norm_sum += sub_norm * sub_norm; 511 } 512 *norm = sqrt(norm_sum); 513 #endif 514 } else { 515 #if CUDA_VERSION >= 12000 516 CeedCallCublas(ceed, cublasDnrm2_64(handle, (int64_t)length, (double *)d_array, 1, (double *)norm)); 517 #else 518 double sub_norm = 0.0, norm_sum = 0.0; 519 double *d_array_start; 520 521 for (CeedInt i = 0; i < num_calls; i++) { 522 d_array_start = (double *)d_array + (CeedSize)(i)*INT_MAX; 523 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 524 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 525 526 CeedCallCublas(ceed, cublasDnrm2(handle, (CeedInt)sub_length, (double *)d_array_start, 1, &sub_norm)); 527 norm_sum += sub_norm * sub_norm; 528 } 529 *norm = sqrt(norm_sum); 530 #endif 531 } 532 break; 533 } 534 case CEED_NORM_MAX: { 535 if (CEED_SCALAR_TYPE == CEED_SCALAR_FP32) { 536 #if CUDA_VERSION >= 12000 537 int64_t index; 538 CeedScalar norm_no_abs; 539 540 CeedCallCublas(ceed, cublasIsamax_64(handle, (int64_t)length, (float *)d_array, 1, &index)); 541 CeedCallCuda(ceed, cudaMemcpy(&norm_no_abs, impl->d_array + index - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 542 *norm = fabs(norm_no_abs); 543 #else 544 CeedInt index; 545 float sub_max = 0.0, current_max = 0.0; 546 float *d_array_start; 547 548 for (CeedInt i = 0; i < num_calls; i++) { 549 d_array_start = (float *)d_array + (CeedSize)(i)*INT_MAX; 550 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 551 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 552 553 CeedCallCublas(ceed, cublasIsamax(handle, (CeedInt)sub_length, (float *)d_array_start, 1, &index)); 554 CeedCallCuda(ceed, cudaMemcpy(&sub_max, d_array_start + index - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 555 if (fabs(sub_max) > current_max) current_max = fabs(sub_max); 556 } 557 *norm = current_max; 558 #endif 559 } else { 560 #if CUDA_VERSION >= 12000 561 int64_t index; 562 CeedScalar norm_no_abs; 563 564 CeedCallCublas(ceed, cublasIdamax_64(handle, (int64_t)length, (double *)d_array, 1, &index)); 565 CeedCallCuda(ceed, cudaMemcpy(&norm_no_abs, impl->d_array + index - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 566 *norm = fabs(norm_no_abs); 567 #else 568 CeedInt index; 569 double sub_max = 0.0, current_max = 0.0; 570 double *d_array_start; 571 572 for (CeedInt i = 0; i < num_calls; i++) { 573 d_array_start = (double *)d_array + (CeedSize)(i)*INT_MAX; 574 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 575 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 576 577 CeedCallCublas(ceed, cublasIdamax(handle, (CeedInt)sub_length, (double *)d_array_start, 1, &index)); 578 CeedCallCuda(ceed, cudaMemcpy(&sub_max, d_array_start + index - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 579 if (fabs(sub_max) > current_max) current_max = fabs(sub_max); 580 } 581 *norm = current_max; 582 #endif 583 } 584 break; 585 } 586 } 587 CeedCallBackend(CeedVectorRestoreArrayRead(vec, &d_array)); 588 return CEED_ERROR_SUCCESS; 589 } 590 591 //------------------------------------------------------------------------------ 592 // Take reciprocal of a vector on host 593 //------------------------------------------------------------------------------ 594 static int CeedHostReciprocal_Cuda(CeedScalar *h_array, CeedSize length) { 595 for (CeedSize i = 0; i < length; i++) { 596 if (fabs(h_array[i]) > CEED_EPSILON) h_array[i] = 1. / h_array[i]; 597 } 598 return CEED_ERROR_SUCCESS; 599 } 600 601 //------------------------------------------------------------------------------ 602 // Take reciprocal of a vector on device (impl in .cu file) 603 //------------------------------------------------------------------------------ 604 int CeedDeviceReciprocal_Cuda(CeedScalar *d_array, CeedSize length); 605 606 //------------------------------------------------------------------------------ 607 // Take reciprocal of a vector 608 //------------------------------------------------------------------------------ 609 static int CeedVectorReciprocal_Cuda(CeedVector vec) { 610 Ceed ceed; 611 CeedSize length; 612 CeedVector_Cuda *impl; 613 614 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 615 CeedCallBackend(CeedVectorGetData(vec, &impl)); 616 CeedCallBackend(CeedVectorGetLength(vec, &length)); 617 // Set value for synced device/host array 618 if (impl->d_array) CeedCallBackend(CeedDeviceReciprocal_Cuda(impl->d_array, length)); 619 if (impl->h_array) CeedCallBackend(CeedHostReciprocal_Cuda(impl->h_array, length)); 620 return CEED_ERROR_SUCCESS; 621 } 622 623 //------------------------------------------------------------------------------ 624 // Compute x = alpha x on the host 625 //------------------------------------------------------------------------------ 626 static int CeedHostScale_Cuda(CeedScalar *x_array, CeedScalar alpha, CeedSize length) { 627 for (CeedSize i = 0; i < length; i++) x_array[i] *= alpha; 628 return CEED_ERROR_SUCCESS; 629 } 630 631 //------------------------------------------------------------------------------ 632 // Compute x = alpha x on device (impl in .cu file) 633 //------------------------------------------------------------------------------ 634 int CeedDeviceScale_Cuda(CeedScalar *x_array, CeedScalar alpha, CeedSize length); 635 636 //------------------------------------------------------------------------------ 637 // Compute x = alpha x 638 //------------------------------------------------------------------------------ 639 static int CeedVectorScale_Cuda(CeedVector x, CeedScalar alpha) { 640 Ceed ceed; 641 CeedSize length; 642 CeedVector_Cuda *x_impl; 643 644 CeedCallBackend(CeedVectorGetCeed(x, &ceed)); 645 CeedCallBackend(CeedVectorGetData(x, &x_impl)); 646 CeedCallBackend(CeedVectorGetLength(x, &length)); 647 // Set value for synced device/host array 648 if (x_impl->d_array) CeedCallBackend(CeedDeviceScale_Cuda(x_impl->d_array, alpha, length)); 649 if (x_impl->h_array) CeedCallBackend(CeedHostScale_Cuda(x_impl->h_array, alpha, length)); 650 return CEED_ERROR_SUCCESS; 651 } 652 653 //------------------------------------------------------------------------------ 654 // Compute y = alpha x + y on the host 655 //------------------------------------------------------------------------------ 656 static int CeedHostAXPY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar *x_array, CeedSize length) { 657 for (CeedSize i = 0; i < length; i++) y_array[i] += alpha * x_array[i]; 658 return CEED_ERROR_SUCCESS; 659 } 660 661 //------------------------------------------------------------------------------ 662 // Compute y = alpha x + y on device (impl in .cu file) 663 //------------------------------------------------------------------------------ 664 int CeedDeviceAXPY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar *x_array, CeedSize length); 665 666 //------------------------------------------------------------------------------ 667 // Compute y = alpha x + y 668 //------------------------------------------------------------------------------ 669 static int CeedVectorAXPY_Cuda(CeedVector y, CeedScalar alpha, CeedVector x) { 670 Ceed ceed; 671 CeedSize length; 672 CeedVector_Cuda *y_impl, *x_impl; 673 674 CeedCallBackend(CeedVectorGetCeed(y, &ceed)); 675 CeedCallBackend(CeedVectorGetData(y, &y_impl)); 676 CeedCallBackend(CeedVectorGetData(x, &x_impl)); 677 CeedCallBackend(CeedVectorGetLength(y, &length)); 678 // Set value for synced device/host array 679 if (y_impl->d_array) { 680 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_DEVICE)); 681 CeedCallBackend(CeedDeviceAXPY_Cuda(y_impl->d_array, alpha, x_impl->d_array, length)); 682 } 683 if (y_impl->h_array) { 684 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_HOST)); 685 CeedCallBackend(CeedHostAXPY_Cuda(y_impl->h_array, alpha, x_impl->h_array, length)); 686 } 687 return CEED_ERROR_SUCCESS; 688 } 689 690 //------------------------------------------------------------------------------ 691 // Compute y = alpha x + beta y on the host 692 //------------------------------------------------------------------------------ 693 static int CeedHostAXPBY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar beta, CeedScalar *x_array, CeedSize length) { 694 for (CeedSize i = 0; i < length; i++) y_array[i] += alpha * x_array[i] + beta * y_array[i]; 695 return CEED_ERROR_SUCCESS; 696 } 697 698 //------------------------------------------------------------------------------ 699 // Compute y = alpha x + beta y on device (impl in .cu file) 700 //------------------------------------------------------------------------------ 701 int CeedDeviceAXPBY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar beta, CeedScalar *x_array, CeedSize length); 702 703 //------------------------------------------------------------------------------ 704 // Compute y = alpha x + beta y 705 //------------------------------------------------------------------------------ 706 static int CeedVectorAXPBY_Cuda(CeedVector y, CeedScalar alpha, CeedScalar beta, CeedVector x) { 707 Ceed ceed; 708 CeedSize length; 709 CeedVector_Cuda *y_impl, *x_impl; 710 711 CeedCallBackend(CeedVectorGetCeed(y, &ceed)); 712 CeedCallBackend(CeedVectorGetData(y, &y_impl)); 713 CeedCallBackend(CeedVectorGetData(x, &x_impl)); 714 CeedCallBackend(CeedVectorGetLength(y, &length)); 715 // Set value for synced device/host array 716 if (y_impl->d_array) { 717 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_DEVICE)); 718 CeedCallBackend(CeedDeviceAXPBY_Cuda(y_impl->d_array, alpha, beta, x_impl->d_array, length)); 719 } 720 if (y_impl->h_array) { 721 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_HOST)); 722 CeedCallBackend(CeedHostAXPBY_Cuda(y_impl->h_array, alpha, beta, x_impl->h_array, length)); 723 } 724 return CEED_ERROR_SUCCESS; 725 } 726 727 //------------------------------------------------------------------------------ 728 // Compute the pointwise multiplication w = x .* y on the host 729 //------------------------------------------------------------------------------ 730 static int CeedHostPointwiseMult_Cuda(CeedScalar *w_array, CeedScalar *x_array, CeedScalar *y_array, CeedSize length) { 731 for (CeedSize i = 0; i < length; i++) w_array[i] = x_array[i] * y_array[i]; 732 return CEED_ERROR_SUCCESS; 733 } 734 735 //------------------------------------------------------------------------------ 736 // Compute the pointwise multiplication w = x .* y on device (impl in .cu file) 737 //------------------------------------------------------------------------------ 738 int CeedDevicePointwiseMult_Cuda(CeedScalar *w_array, CeedScalar *x_array, CeedScalar *y_array, CeedSize length); 739 740 //------------------------------------------------------------------------------ 741 // Compute the pointwise multiplication w = x .* y 742 //------------------------------------------------------------------------------ 743 static int CeedVectorPointwiseMult_Cuda(CeedVector w, CeedVector x, CeedVector y) { 744 Ceed ceed; 745 CeedSize length; 746 CeedVector_Cuda *w_impl, *x_impl, *y_impl; 747 748 CeedCallBackend(CeedVectorGetCeed(w, &ceed)); 749 CeedCallBackend(CeedVectorGetData(w, &w_impl)); 750 CeedCallBackend(CeedVectorGetData(x, &x_impl)); 751 CeedCallBackend(CeedVectorGetData(y, &y_impl)); 752 CeedCallBackend(CeedVectorGetLength(w, &length)); 753 // Set value for synced device/host array 754 if (!w_impl->d_array && !w_impl->h_array) { 755 CeedCallBackend(CeedVectorSetValue(w, 0.0)); 756 } 757 if (w_impl->d_array) { 758 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_DEVICE)); 759 CeedCallBackend(CeedVectorSyncArray(y, CEED_MEM_DEVICE)); 760 CeedCallBackend(CeedDevicePointwiseMult_Cuda(w_impl->d_array, x_impl->d_array, y_impl->d_array, length)); 761 } 762 if (w_impl->h_array) { 763 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_HOST)); 764 CeedCallBackend(CeedVectorSyncArray(y, CEED_MEM_HOST)); 765 CeedCallBackend(CeedHostPointwiseMult_Cuda(w_impl->h_array, x_impl->h_array, y_impl->h_array, length)); 766 } 767 return CEED_ERROR_SUCCESS; 768 } 769 770 //------------------------------------------------------------------------------ 771 // Destroy the vector 772 //------------------------------------------------------------------------------ 773 static int CeedVectorDestroy_Cuda(const CeedVector vec) { 774 Ceed ceed; 775 CeedVector_Cuda *impl; 776 777 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 778 CeedCallBackend(CeedVectorGetData(vec, &impl)); 779 CeedCallCuda(ceed, cudaFree(impl->d_array_owned)); 780 CeedCallBackend(CeedFree(&impl->h_array_owned)); 781 CeedCallBackend(CeedFree(&impl)); 782 return CEED_ERROR_SUCCESS; 783 } 784 785 //------------------------------------------------------------------------------ 786 // Create a vector of the specified length (does not allocate memory) 787 //------------------------------------------------------------------------------ 788 int CeedVectorCreate_Cuda(CeedSize n, CeedVector vec) { 789 CeedVector_Cuda *impl; 790 Ceed ceed; 791 792 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 793 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "HasValidArray", CeedVectorHasValidArray_Cuda)); 794 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "HasBorrowedArrayOfType", CeedVectorHasBorrowedArrayOfType_Cuda)); 795 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "SetArray", CeedVectorSetArray_Cuda)); 796 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "TakeArray", CeedVectorTakeArray_Cuda)); 797 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "SetValue", (int (*)())CeedVectorSetValue_Cuda)); 798 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "SyncArray", CeedVectorSyncArray_Cuda)); 799 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "GetArray", CeedVectorGetArray_Cuda)); 800 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "GetArrayRead", CeedVectorGetArrayRead_Cuda)); 801 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "GetArrayWrite", CeedVectorGetArrayWrite_Cuda)); 802 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Norm", CeedVectorNorm_Cuda)); 803 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Reciprocal", CeedVectorReciprocal_Cuda)); 804 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Scale", (int (*)())CeedVectorScale_Cuda)); 805 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "AXPY", (int (*)())CeedVectorAXPY_Cuda)); 806 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "AXPBY", (int (*)())CeedVectorAXPBY_Cuda)); 807 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "PointwiseMult", CeedVectorPointwiseMult_Cuda)); 808 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Destroy", CeedVectorDestroy_Cuda)); 809 CeedCallBackend(CeedCalloc(1, &impl)); 810 CeedCallBackend(CeedVectorSetData(vec, impl)); 811 return CEED_ERROR_SUCCESS; 812 } 813 814 //------------------------------------------------------------------------------ 815