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 <cublas_v2.h> 11 #include <cuda_runtime.h> 12 #include <math.h> 13 #include <stdbool.h> 14 #include <string.h> 15 16 #include "../cuda/ceed-cuda-common.h" 17 #include "ceed-cuda-ref.h" 18 19 //------------------------------------------------------------------------------ 20 // Check if host/device sync is needed 21 //------------------------------------------------------------------------------ 22 static inline int CeedVectorNeedSync_Cuda(const CeedVector vec, CeedMemType mem_type, bool *need_sync) { 23 CeedVector_Cuda *impl; 24 CeedCallBackend(CeedVectorGetData(vec, &impl)); 25 26 bool has_valid_array = false; 27 CeedCallBackend(CeedVectorHasValidArray(vec, &has_valid_array)); 28 switch (mem_type) { 29 case CEED_MEM_HOST: 30 *need_sync = has_valid_array && !impl->h_array; 31 break; 32 case CEED_MEM_DEVICE: 33 *need_sync = has_valid_array && !impl->d_array; 34 break; 35 } 36 37 return CEED_ERROR_SUCCESS; 38 } 39 40 //------------------------------------------------------------------------------ 41 // Sync host to device 42 //------------------------------------------------------------------------------ 43 static inline int CeedVectorSyncH2D_Cuda(const CeedVector vec) { 44 Ceed ceed; 45 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 46 CeedVector_Cuda *impl; 47 CeedCallBackend(CeedVectorGetData(vec, &impl)); 48 49 CeedCheck(impl->h_array, ceed, CEED_ERROR_BACKEND, "No valid host data to sync to device"); 50 51 CeedSize length; 52 CeedCallBackend(CeedVectorGetLength(vec, &length)); 53 size_t bytes = length * sizeof(CeedScalar); 54 55 if (impl->d_array_borrowed) { 56 impl->d_array = impl->d_array_borrowed; 57 } else if (impl->d_array_owned) { 58 impl->d_array = impl->d_array_owned; 59 } else { 60 CeedCallCuda(ceed, cudaMalloc((void **)&impl->d_array_owned, bytes)); 61 impl->d_array = impl->d_array_owned; 62 } 63 64 CeedCallCuda(ceed, cudaMemcpy(impl->d_array, impl->h_array, bytes, cudaMemcpyHostToDevice)); 65 66 return CEED_ERROR_SUCCESS; 67 } 68 69 //------------------------------------------------------------------------------ 70 // Sync device to host 71 //------------------------------------------------------------------------------ 72 static inline int CeedVectorSyncD2H_Cuda(const CeedVector vec) { 73 Ceed ceed; 74 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 75 CeedVector_Cuda *impl; 76 CeedCallBackend(CeedVectorGetData(vec, &impl)); 77 78 CeedCheck(impl->d_array, ceed, CEED_ERROR_BACKEND, "No valid device data to sync to host"); 79 80 if (impl->h_array_borrowed) { 81 impl->h_array = impl->h_array_borrowed; 82 } else if (impl->h_array_owned) { 83 impl->h_array = impl->h_array_owned; 84 } else { 85 CeedSize length; 86 CeedCallBackend(CeedVectorGetLength(vec, &length)); 87 CeedCallBackend(CeedCalloc(length, &impl->h_array_owned)); 88 impl->h_array = impl->h_array_owned; 89 } 90 91 CeedSize length; 92 CeedCallBackend(CeedVectorGetLength(vec, &length)); 93 size_t bytes = length * sizeof(CeedScalar); 94 CeedCallCuda(ceed, cudaMemcpy(impl->h_array, impl->d_array, bytes, cudaMemcpyDeviceToHost)); 95 96 return CEED_ERROR_SUCCESS; 97 } 98 99 //------------------------------------------------------------------------------ 100 // Sync arrays 101 //------------------------------------------------------------------------------ 102 static int CeedVectorSyncArray_Cuda(const CeedVector vec, CeedMemType mem_type) { 103 // Check whether device/host sync is needed 104 bool need_sync = false; 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 CeedCallBackend(CeedVectorGetData(vec, &impl)); 123 124 impl->h_array = NULL; 125 impl->d_array = NULL; 126 127 return CEED_ERROR_SUCCESS; 128 } 129 130 //------------------------------------------------------------------------------ 131 // Check if CeedVector has any valid pointer 132 //------------------------------------------------------------------------------ 133 static inline int CeedVectorHasValidArray_Cuda(const CeedVector vec, bool *has_valid_array) { 134 CeedVector_Cuda *impl; 135 CeedCallBackend(CeedVectorGetData(vec, &impl)); 136 137 *has_valid_array = !!impl->h_array || !!impl->d_array; 138 139 return CEED_ERROR_SUCCESS; 140 } 141 142 //------------------------------------------------------------------------------ 143 // Check if has array of given type 144 //------------------------------------------------------------------------------ 145 static inline int CeedVectorHasArrayOfType_Cuda(const CeedVector vec, CeedMemType mem_type, bool *has_array_of_type) { 146 CeedVector_Cuda *impl; 147 CeedCallBackend(CeedVectorGetData(vec, &impl)); 148 149 switch (mem_type) { 150 case CEED_MEM_HOST: 151 *has_array_of_type = !!impl->h_array_borrowed || !!impl->h_array_owned; 152 break; 153 case CEED_MEM_DEVICE: 154 *has_array_of_type = !!impl->d_array_borrowed || !!impl->d_array_owned; 155 break; 156 } 157 158 return CEED_ERROR_SUCCESS; 159 } 160 161 //------------------------------------------------------------------------------ 162 // Check if has borrowed array of given type 163 //------------------------------------------------------------------------------ 164 static inline int CeedVectorHasBorrowedArrayOfType_Cuda(const CeedVector vec, CeedMemType mem_type, bool *has_borrowed_array_of_type) { 165 CeedVector_Cuda *impl; 166 CeedCallBackend(CeedVectorGetData(vec, &impl)); 167 168 switch (mem_type) { 169 case CEED_MEM_HOST: 170 *has_borrowed_array_of_type = !!impl->h_array_borrowed; 171 break; 172 case CEED_MEM_DEVICE: 173 *has_borrowed_array_of_type = !!impl->d_array_borrowed; 174 break; 175 } 176 177 return CEED_ERROR_SUCCESS; 178 } 179 180 //------------------------------------------------------------------------------ 181 // Set array from host 182 //------------------------------------------------------------------------------ 183 static int CeedVectorSetArrayHost_Cuda(const CeedVector vec, const CeedCopyMode copy_mode, CeedScalar *array) { 184 CeedVector_Cuda *impl; 185 CeedCallBackend(CeedVectorGetData(vec, &impl)); 186 187 switch (copy_mode) { 188 case CEED_COPY_VALUES: { 189 CeedSize length; 190 if (!impl->h_array_owned) { 191 CeedCallBackend(CeedVectorGetLength(vec, &length)); 192 CeedCallBackend(CeedMalloc(length, &impl->h_array_owned)); 193 } 194 impl->h_array_borrowed = NULL; 195 impl->h_array = impl->h_array_owned; 196 if (array) { 197 CeedSize length; 198 CeedCallBackend(CeedVectorGetLength(vec, &length)); 199 size_t bytes = length * sizeof(CeedScalar); 200 memcpy(impl->h_array, array, bytes); 201 } 202 } break; 203 case CEED_OWN_POINTER: 204 CeedCallBackend(CeedFree(&impl->h_array_owned)); 205 impl->h_array_owned = array; 206 impl->h_array_borrowed = NULL; 207 impl->h_array = array; 208 break; 209 case CEED_USE_POINTER: 210 CeedCallBackend(CeedFree(&impl->h_array_owned)); 211 impl->h_array_borrowed = array; 212 impl->h_array = array; 213 break; 214 } 215 216 return CEED_ERROR_SUCCESS; 217 } 218 219 //------------------------------------------------------------------------------ 220 // Set array from device 221 //------------------------------------------------------------------------------ 222 static int CeedVectorSetArrayDevice_Cuda(const CeedVector vec, const CeedCopyMode copy_mode, CeedScalar *array) { 223 Ceed ceed; 224 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 225 CeedVector_Cuda *impl; 226 CeedCallBackend(CeedVectorGetData(vec, &impl)); 227 228 switch (copy_mode) { 229 case CEED_COPY_VALUES: { 230 CeedSize length; 231 CeedCallBackend(CeedVectorGetLength(vec, &length)); 232 size_t bytes = length * sizeof(CeedScalar); 233 if (!impl->d_array_owned) { 234 CeedCallCuda(ceed, cudaMalloc((void **)&impl->d_array_owned, bytes)); 235 impl->d_array = impl->d_array_owned; 236 } 237 if (array) CeedCallCuda(ceed, cudaMemcpy(impl->d_array, array, bytes, cudaMemcpyDeviceToDevice)); 238 } break; 239 case CEED_OWN_POINTER: 240 CeedCallCuda(ceed, cudaFree(impl->d_array_owned)); 241 impl->d_array_owned = array; 242 impl->d_array_borrowed = NULL; 243 impl->d_array = array; 244 break; 245 case CEED_USE_POINTER: 246 CeedCallCuda(ceed, cudaFree(impl->d_array_owned)); 247 impl->d_array_owned = NULL; 248 impl->d_array_borrowed = array; 249 impl->d_array = array; 250 break; 251 } 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 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 263 CeedVector_Cuda *impl; 264 CeedCallBackend(CeedVectorGetData(vec, &impl)); 265 266 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 } 273 274 return CEED_ERROR_UNSUPPORTED; 275 } 276 277 //------------------------------------------------------------------------------ 278 // Set host array to value 279 //------------------------------------------------------------------------------ 280 static int CeedHostSetValue_Cuda(CeedScalar *h_array, CeedSize length, CeedScalar val) { 281 for (CeedSize i = 0; i < length; i++) h_array[i] = val; 282 return CEED_ERROR_SUCCESS; 283 } 284 285 //------------------------------------------------------------------------------ 286 // Set device array to value (impl in .cu file) 287 //------------------------------------------------------------------------------ 288 int CeedDeviceSetValue_Cuda(CeedScalar *d_array, CeedSize length, CeedScalar val); 289 290 //------------------------------------------------------------------------------ 291 // Set a vector to a value 292 //------------------------------------------------------------------------------ 293 static int CeedVectorSetValue_Cuda(CeedVector vec, CeedScalar val) { 294 Ceed ceed; 295 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 296 CeedVector_Cuda *impl; 297 CeedCallBackend(CeedVectorGetData(vec, &impl)); 298 CeedSize length; 299 CeedCallBackend(CeedVectorGetLength(vec, &length)); 300 301 // Set value for synced device/host array 302 if (!impl->d_array && !impl->h_array) { 303 if (impl->d_array_borrowed) { 304 impl->d_array = impl->d_array_borrowed; 305 } else if (impl->h_array_borrowed) { 306 impl->h_array = impl->h_array_borrowed; 307 } else if (impl->d_array_owned) { 308 impl->d_array = impl->d_array_owned; 309 } else if (impl->h_array_owned) { 310 impl->h_array = impl->h_array_owned; 311 } else { 312 CeedCallBackend(CeedVectorSetArray(vec, CEED_MEM_DEVICE, CEED_COPY_VALUES, NULL)); 313 } 314 } 315 if (impl->d_array) { 316 CeedCallBackend(CeedDeviceSetValue_Cuda(impl->d_array, length, val)); 317 impl->h_array = NULL; 318 } 319 if (impl->h_array) { 320 CeedCallBackend(CeedHostSetValue_Cuda(impl->h_array, length, val)); 321 impl->d_array = NULL; 322 } 323 324 return CEED_ERROR_SUCCESS; 325 } 326 327 //------------------------------------------------------------------------------ 328 // Vector Take Array 329 //------------------------------------------------------------------------------ 330 static int CeedVectorTakeArray_Cuda(CeedVector vec, CeedMemType mem_type, CeedScalar **array) { 331 Ceed ceed; 332 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 333 CeedVector_Cuda *impl; 334 CeedCallBackend(CeedVectorGetData(vec, &impl)); 335 336 // Sync array to requested mem_type 337 CeedCallBackend(CeedVectorSyncArray(vec, mem_type)); 338 339 // Update pointer 340 switch (mem_type) { 341 case CEED_MEM_HOST: 342 (*array) = impl->h_array_borrowed; 343 impl->h_array_borrowed = NULL; 344 impl->h_array = NULL; 345 break; 346 case CEED_MEM_DEVICE: 347 (*array) = impl->d_array_borrowed; 348 impl->d_array_borrowed = NULL; 349 impl->d_array = NULL; 350 break; 351 } 352 353 return CEED_ERROR_SUCCESS; 354 } 355 356 //------------------------------------------------------------------------------ 357 // Core logic for array syncronization for GetArray. 358 // If a different memory type is most up to date, this will perform a copy 359 //------------------------------------------------------------------------------ 360 static int CeedVectorGetArrayCore_Cuda(const CeedVector vec, const CeedMemType mem_type, CeedScalar **array) { 361 Ceed ceed; 362 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 363 CeedVector_Cuda *impl; 364 CeedCallBackend(CeedVectorGetData(vec, &impl)); 365 366 // Sync array to requested mem_type 367 CeedCallBackend(CeedVectorSyncArray(vec, mem_type)); 368 369 // Update pointer 370 switch (mem_type) { 371 case CEED_MEM_HOST: 372 *array = impl->h_array; 373 break; 374 case CEED_MEM_DEVICE: 375 *array = impl->d_array; 376 break; 377 } 378 379 return CEED_ERROR_SUCCESS; 380 } 381 382 //------------------------------------------------------------------------------ 383 // Get read-only access to a vector via the specified mem_type 384 //------------------------------------------------------------------------------ 385 static int CeedVectorGetArrayRead_Cuda(const CeedVector vec, const CeedMemType mem_type, const CeedScalar **array) { 386 return CeedVectorGetArrayCore_Cuda(vec, mem_type, (CeedScalar **)array); 387 } 388 389 //------------------------------------------------------------------------------ 390 // Get read/write access to a vector via the specified mem_type 391 //------------------------------------------------------------------------------ 392 static int CeedVectorGetArray_Cuda(const CeedVector vec, const CeedMemType mem_type, CeedScalar **array) { 393 CeedVector_Cuda *impl; 394 CeedCallBackend(CeedVectorGetData(vec, &impl)); 395 396 CeedCallBackend(CeedVectorGetArrayCore_Cuda(vec, mem_type, array)); 397 398 CeedCallBackend(CeedVectorSetAllInvalid_Cuda(vec)); 399 switch (mem_type) { 400 case CEED_MEM_HOST: 401 impl->h_array = *array; 402 break; 403 case CEED_MEM_DEVICE: 404 impl->d_array = *array; 405 break; 406 } 407 408 return CEED_ERROR_SUCCESS; 409 } 410 411 //------------------------------------------------------------------------------ 412 // Get write access to a vector via the specified mem_type 413 //------------------------------------------------------------------------------ 414 static int CeedVectorGetArrayWrite_Cuda(const CeedVector vec, const CeedMemType mem_type, CeedScalar **array) { 415 CeedVector_Cuda *impl; 416 CeedCallBackend(CeedVectorGetData(vec, &impl)); 417 418 bool has_array_of_type = true; 419 CeedCallBackend(CeedVectorHasArrayOfType_Cuda(vec, mem_type, &has_array_of_type)); 420 if (!has_array_of_type) { 421 // Allocate if array is not yet allocated 422 CeedCallBackend(CeedVectorSetArray(vec, mem_type, CEED_COPY_VALUES, NULL)); 423 } else { 424 // Select dirty array 425 switch (mem_type) { 426 case CEED_MEM_HOST: 427 if (impl->h_array_borrowed) impl->h_array = impl->h_array_borrowed; 428 else impl->h_array = impl->h_array_owned; 429 break; 430 case CEED_MEM_DEVICE: 431 if (impl->d_array_borrowed) impl->d_array = impl->d_array_borrowed; 432 else impl->d_array = impl->d_array_owned; 433 } 434 } 435 436 return CeedVectorGetArray_Cuda(vec, mem_type, array); 437 } 438 439 //------------------------------------------------------------------------------ 440 // Get the norm of a CeedVector 441 //------------------------------------------------------------------------------ 442 static int CeedVectorNorm_Cuda(CeedVector vec, CeedNormType type, CeedScalar *norm) { 443 Ceed ceed; 444 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 445 CeedVector_Cuda *impl; 446 CeedCallBackend(CeedVectorGetData(vec, &impl)); 447 CeedSize length; 448 CeedCallBackend(CeedVectorGetLength(vec, &length)); 449 cublasHandle_t handle; 450 CeedCallBackend(CeedGetCublasHandle_Cuda(ceed, &handle)); 451 452 #if CUDA_VERSION < 12000 453 // With CUDA 12, we can use the 64-bit integer interface. Prior to that, 454 // we need to check if the vector is too long to handle with int32, 455 // and if so, divide it into subsections for repeated cuBLAS calls 456 CeedSize num_calls = length / INT_MAX; 457 if (length % INT_MAX > 0) num_calls += 1; 458 #endif 459 460 // Compute norm 461 const CeedScalar *d_array; 462 CeedCallBackend(CeedVectorGetArrayRead(vec, CEED_MEM_DEVICE, &d_array)); 463 switch (type) { 464 case CEED_NORM_1: { 465 *norm = 0.0; 466 if (CEED_SCALAR_TYPE == CEED_SCALAR_FP32) { 467 #if CUDA_VERSION >= 12000 // We have CUDA 12, and can use 64-bit integers 468 CeedCallCublas(ceed, cublasSasum_64(handle, (int64_t)length, (float *)d_array, 1, (float *)norm)); 469 #else 470 float sub_norm = 0.0; 471 float *d_array_start; 472 for (CeedInt i = 0; i < num_calls; i++) { 473 d_array_start = (float *)d_array + (CeedSize)(i)*INT_MAX; 474 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 475 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 476 CeedCallCublas(ceed, cublasSasum(handle, (CeedInt)sub_length, (float *)d_array_start, 1, &sub_norm)); 477 *norm += sub_norm; 478 } 479 #endif 480 } else { 481 #if CUDA_VERSION >= 12000 482 CeedCallCublas(ceed, cublasDasum_64(handle, (int64_t)length, (double *)d_array, 1, (double *)norm)); 483 #else 484 double sub_norm = 0.0; 485 double *d_array_start; 486 for (CeedInt i = 0; i < num_calls; i++) { 487 d_array_start = (double *)d_array + (CeedSize)(i)*INT_MAX; 488 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 489 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 490 CeedCallCublas(ceed, cublasDasum(handle, (CeedInt)sub_length, (double *)d_array_start, 1, &sub_norm)); 491 *norm += sub_norm; 492 } 493 #endif 494 } 495 break; 496 } 497 case CEED_NORM_2: { 498 if (CEED_SCALAR_TYPE == CEED_SCALAR_FP32) { 499 #if CUDA_VERSION >= 12000 500 CeedCallCublas(ceed, cublasSnrm2_64(handle, (int64_t)length, (float *)d_array, 1, (float *)norm)); 501 #else 502 float sub_norm = 0.0, norm_sum = 0.0; 503 float *d_array_start; 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 CeedCallCublas(ceed, cublasSnrm2(handle, (CeedInt)sub_length, (float *)d_array_start, 1, &sub_norm)); 509 norm_sum += sub_norm * sub_norm; 510 } 511 *norm = sqrt(norm_sum); 512 #endif 513 } else { 514 #if CUDA_VERSION >= 12000 515 CeedCallCublas(ceed, cublasDnrm2_64(handle, (int64_t)length, (double *)d_array, 1, (double *)norm)); 516 #else 517 double sub_norm = 0.0, norm_sum = 0.0; 518 double *d_array_start; 519 for (CeedInt i = 0; i < num_calls; i++) { 520 d_array_start = (double *)d_array + (CeedSize)(i)*INT_MAX; 521 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 522 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 523 CeedCallCublas(ceed, cublasDnrm2(handle, (CeedInt)sub_length, (double *)d_array_start, 1, &sub_norm)); 524 norm_sum += sub_norm * sub_norm; 525 } 526 *norm = sqrt(norm_sum); 527 #endif 528 } 529 break; 530 } 531 case CEED_NORM_MAX: { 532 if (CEED_SCALAR_TYPE == CEED_SCALAR_FP32) { 533 #if CUDA_VERSION >= 12000 534 int64_t indx; 535 CeedCallCublas(ceed, cublasIsamax_64(handle, (int64_t)length, (float *)d_array, 1, &indx)); 536 CeedScalar normNoAbs; 537 CeedCallCuda(ceed, cudaMemcpy(&normNoAbs, impl->d_array + indx - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 538 *norm = fabs(normNoAbs); 539 #else 540 CeedInt indx; 541 float sub_max = 0.0, current_max = 0.0; 542 float *d_array_start; 543 for (CeedInt i = 0; i < num_calls; i++) { 544 d_array_start = (float *)d_array + (CeedSize)(i)*INT_MAX; 545 CeedSize remaining_length = length - (CeedSize)(i)*INT_MAX; 546 CeedInt sub_length = (i == num_calls - 1) ? (CeedInt)(remaining_length) : INT_MAX; 547 CeedCallCublas(ceed, cublasIsamax(handle, (CeedInt)sub_length, (float *)d_array_start, 1, &indx)); 548 CeedCallCuda(ceed, cudaMemcpy(&sub_max, d_array_start + indx - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 549 if (fabs(sub_max) > current_max) current_max = fabs(sub_max); 550 } 551 *norm = current_max; 552 #endif 553 } else { 554 #if CUDA_VERSION >= 12000 555 int64_t indx; 556 CeedCallCublas(ceed, cublasIdamax_64(handle, (int64_t)length, (double *)d_array, 1, &indx)); 557 CeedScalar normNoAbs; 558 CeedCallCuda(ceed, cudaMemcpy(&normNoAbs, impl->d_array + indx - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 559 *norm = fabs(normNoAbs); 560 #else 561 CeedInt indx; 562 double sub_max = 0.0, current_max = 0.0; 563 double *d_array_start; 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 CeedCallCublas(ceed, cublasIdamax(handle, (CeedInt)sub_length, (double *)d_array_start, 1, &indx)); 569 CeedCallCuda(ceed, cudaMemcpy(&sub_max, d_array_start + indx - 1, sizeof(CeedScalar), cudaMemcpyDeviceToHost)); 570 if (fabs(sub_max) > current_max) current_max = fabs(sub_max); 571 } 572 *norm = current_max; 573 #endif 574 } 575 break; 576 } 577 } 578 CeedCallBackend(CeedVectorRestoreArrayRead(vec, &d_array)); 579 580 return CEED_ERROR_SUCCESS; 581 } 582 583 //------------------------------------------------------------------------------ 584 // Take reciprocal of a vector on host 585 //------------------------------------------------------------------------------ 586 static int CeedHostReciprocal_Cuda(CeedScalar *h_array, CeedSize length) { 587 for (CeedSize i = 0; i < length; i++) { 588 if (fabs(h_array[i]) > CEED_EPSILON) h_array[i] = 1. / h_array[i]; 589 } 590 return CEED_ERROR_SUCCESS; 591 } 592 593 //------------------------------------------------------------------------------ 594 // Take reciprocal of a vector on device (impl in .cu file) 595 //------------------------------------------------------------------------------ 596 int CeedDeviceReciprocal_Cuda(CeedScalar *d_array, CeedSize length); 597 598 //------------------------------------------------------------------------------ 599 // Take reciprocal of a vector 600 //------------------------------------------------------------------------------ 601 static int CeedVectorReciprocal_Cuda(CeedVector vec) { 602 Ceed ceed; 603 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 604 CeedVector_Cuda *impl; 605 CeedCallBackend(CeedVectorGetData(vec, &impl)); 606 CeedSize length; 607 CeedCallBackend(CeedVectorGetLength(vec, &length)); 608 609 // Set value for synced device/host array 610 if (impl->d_array) CeedCallBackend(CeedDeviceReciprocal_Cuda(impl->d_array, length)); 611 if (impl->h_array) CeedCallBackend(CeedHostReciprocal_Cuda(impl->h_array, length)); 612 613 return CEED_ERROR_SUCCESS; 614 } 615 616 //------------------------------------------------------------------------------ 617 // Compute x = alpha x on the host 618 //------------------------------------------------------------------------------ 619 static int CeedHostScale_Cuda(CeedScalar *x_array, CeedScalar alpha, CeedSize length) { 620 for (CeedSize i = 0; i < length; i++) x_array[i] *= alpha; 621 return CEED_ERROR_SUCCESS; 622 } 623 624 //------------------------------------------------------------------------------ 625 // Compute x = alpha x on device (impl in .cu file) 626 //------------------------------------------------------------------------------ 627 int CeedDeviceScale_Cuda(CeedScalar *x_array, CeedScalar alpha, CeedSize length); 628 629 //------------------------------------------------------------------------------ 630 // Compute x = alpha x 631 //------------------------------------------------------------------------------ 632 static int CeedVectorScale_Cuda(CeedVector x, CeedScalar alpha) { 633 Ceed ceed; 634 CeedCallBackend(CeedVectorGetCeed(x, &ceed)); 635 CeedVector_Cuda *x_impl; 636 CeedCallBackend(CeedVectorGetData(x, &x_impl)); 637 CeedSize length; 638 CeedCallBackend(CeedVectorGetLength(x, &length)); 639 640 // Set value for synced device/host array 641 if (x_impl->d_array) CeedCallBackend(CeedDeviceScale_Cuda(x_impl->d_array, alpha, length)); 642 if (x_impl->h_array) CeedCallBackend(CeedHostScale_Cuda(x_impl->h_array, alpha, length)); 643 644 return CEED_ERROR_SUCCESS; 645 } 646 647 //------------------------------------------------------------------------------ 648 // Compute y = alpha x + y on the host 649 //------------------------------------------------------------------------------ 650 static int CeedHostAXPY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar *x_array, CeedSize length) { 651 for (CeedSize i = 0; i < length; i++) y_array[i] += alpha * x_array[i]; 652 return CEED_ERROR_SUCCESS; 653 } 654 655 //------------------------------------------------------------------------------ 656 // Compute y = alpha x + y on device (impl in .cu file) 657 //------------------------------------------------------------------------------ 658 int CeedDeviceAXPY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar *x_array, CeedSize length); 659 660 //------------------------------------------------------------------------------ 661 // Compute y = alpha x + y 662 //------------------------------------------------------------------------------ 663 static int CeedVectorAXPY_Cuda(CeedVector y, CeedScalar alpha, CeedVector x) { 664 Ceed ceed; 665 CeedCallBackend(CeedVectorGetCeed(y, &ceed)); 666 CeedVector_Cuda *y_impl, *x_impl; 667 CeedCallBackend(CeedVectorGetData(y, &y_impl)); 668 CeedCallBackend(CeedVectorGetData(x, &x_impl)); 669 CeedSize length; 670 CeedCallBackend(CeedVectorGetLength(y, &length)); 671 672 // Set value for synced device/host array 673 if (y_impl->d_array) { 674 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_DEVICE)); 675 CeedCallBackend(CeedDeviceAXPY_Cuda(y_impl->d_array, alpha, x_impl->d_array, length)); 676 } 677 if (y_impl->h_array) { 678 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_HOST)); 679 CeedCallBackend(CeedHostAXPY_Cuda(y_impl->h_array, alpha, x_impl->h_array, length)); 680 } 681 682 return CEED_ERROR_SUCCESS; 683 } 684 685 //------------------------------------------------------------------------------ 686 // Compute y = alpha x + beta y on the host 687 //------------------------------------------------------------------------------ 688 static int CeedHostAXPBY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar beta, CeedScalar *x_array, CeedSize length) { 689 for (CeedSize i = 0; i < length; i++) y_array[i] += alpha * x_array[i] + beta * y_array[i]; 690 return CEED_ERROR_SUCCESS; 691 } 692 693 //------------------------------------------------------------------------------ 694 // Compute y = alpha x + beta y on device (impl in .cu file) 695 //------------------------------------------------------------------------------ 696 int CeedDeviceAXPBY_Cuda(CeedScalar *y_array, CeedScalar alpha, CeedScalar beta, CeedScalar *x_array, CeedSize length); 697 698 //------------------------------------------------------------------------------ 699 // Compute y = alpha x + beta y 700 //------------------------------------------------------------------------------ 701 static int CeedVectorAXPBY_Cuda(CeedVector y, CeedScalar alpha, CeedScalar beta, CeedVector x) { 702 Ceed ceed; 703 CeedCallBackend(CeedVectorGetCeed(y, &ceed)); 704 CeedVector_Cuda *y_impl, *x_impl; 705 CeedCallBackend(CeedVectorGetData(y, &y_impl)); 706 CeedCallBackend(CeedVectorGetData(x, &x_impl)); 707 CeedSize length; 708 CeedCallBackend(CeedVectorGetLength(y, &length)); 709 710 // Set value for synced device/host array 711 if (y_impl->d_array) { 712 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_DEVICE)); 713 CeedCallBackend(CeedDeviceAXPBY_Cuda(y_impl->d_array, alpha, beta, x_impl->d_array, length)); 714 } 715 if (y_impl->h_array) { 716 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_HOST)); 717 CeedCallBackend(CeedHostAXPBY_Cuda(y_impl->h_array, alpha, beta, x_impl->h_array, length)); 718 } 719 720 return CEED_ERROR_SUCCESS; 721 } 722 723 //------------------------------------------------------------------------------ 724 // Compute the pointwise multiplication w = x .* y on the host 725 //------------------------------------------------------------------------------ 726 static int CeedHostPointwiseMult_Cuda(CeedScalar *w_array, CeedScalar *x_array, CeedScalar *y_array, CeedSize length) { 727 for (CeedSize i = 0; i < length; i++) w_array[i] = x_array[i] * y_array[i]; 728 return CEED_ERROR_SUCCESS; 729 } 730 731 //------------------------------------------------------------------------------ 732 // Compute the pointwise multiplication w = x .* y on device (impl in .cu file) 733 //------------------------------------------------------------------------------ 734 int CeedDevicePointwiseMult_Cuda(CeedScalar *w_array, CeedScalar *x_array, CeedScalar *y_array, CeedSize length); 735 736 //------------------------------------------------------------------------------ 737 // Compute the pointwise multiplication w = x .* y 738 //------------------------------------------------------------------------------ 739 static int CeedVectorPointwiseMult_Cuda(CeedVector w, CeedVector x, CeedVector y) { 740 Ceed ceed; 741 CeedCallBackend(CeedVectorGetCeed(w, &ceed)); 742 CeedVector_Cuda *w_impl, *x_impl, *y_impl; 743 CeedCallBackend(CeedVectorGetData(w, &w_impl)); 744 CeedCallBackend(CeedVectorGetData(x, &x_impl)); 745 CeedCallBackend(CeedVectorGetData(y, &y_impl)); 746 CeedSize length; 747 CeedCallBackend(CeedVectorGetLength(w, &length)); 748 749 // Set value for synced device/host array 750 if (!w_impl->d_array && !w_impl->h_array) { 751 CeedCallBackend(CeedVectorSetValue(w, 0.0)); 752 } 753 if (w_impl->d_array) { 754 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_DEVICE)); 755 CeedCallBackend(CeedVectorSyncArray(y, CEED_MEM_DEVICE)); 756 CeedCallBackend(CeedDevicePointwiseMult_Cuda(w_impl->d_array, x_impl->d_array, y_impl->d_array, length)); 757 } 758 if (w_impl->h_array) { 759 CeedCallBackend(CeedVectorSyncArray(x, CEED_MEM_HOST)); 760 CeedCallBackend(CeedVectorSyncArray(y, CEED_MEM_HOST)); 761 CeedCallBackend(CeedHostPointwiseMult_Cuda(w_impl->h_array, x_impl->h_array, y_impl->h_array, length)); 762 } 763 764 return CEED_ERROR_SUCCESS; 765 } 766 767 //------------------------------------------------------------------------------ 768 // Destroy the vector 769 //------------------------------------------------------------------------------ 770 static int CeedVectorDestroy_Cuda(const CeedVector vec) { 771 Ceed ceed; 772 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 773 CeedVector_Cuda *impl; 774 CeedCallBackend(CeedVectorGetData(vec, &impl)); 775 776 CeedCallCuda(ceed, cudaFree(impl->d_array_owned)); 777 CeedCallBackend(CeedFree(&impl->h_array_owned)); 778 CeedCallBackend(CeedFree(&impl)); 779 780 return CEED_ERROR_SUCCESS; 781 } 782 783 //------------------------------------------------------------------------------ 784 // Create a vector of the specified length (does not allocate memory) 785 //------------------------------------------------------------------------------ 786 int CeedVectorCreate_Cuda(CeedSize n, CeedVector vec) { 787 CeedVector_Cuda *impl; 788 Ceed ceed; 789 CeedCallBackend(CeedVectorGetCeed(vec, &ceed)); 790 791 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "HasValidArray", CeedVectorHasValidArray_Cuda)); 792 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "HasBorrowedArrayOfType", CeedVectorHasBorrowedArrayOfType_Cuda)); 793 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "SetArray", CeedVectorSetArray_Cuda)); 794 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "TakeArray", CeedVectorTakeArray_Cuda)); 795 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "SetValue", (int (*)())CeedVectorSetValue_Cuda)); 796 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "SyncArray", CeedVectorSyncArray_Cuda)); 797 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "GetArray", CeedVectorGetArray_Cuda)); 798 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "GetArrayRead", CeedVectorGetArrayRead_Cuda)); 799 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "GetArrayWrite", CeedVectorGetArrayWrite_Cuda)); 800 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Norm", CeedVectorNorm_Cuda)); 801 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Reciprocal", CeedVectorReciprocal_Cuda)); 802 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Scale", (int (*)())CeedVectorScale_Cuda)); 803 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "AXPY", (int (*)())CeedVectorAXPY_Cuda)); 804 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "AXPBY", (int (*)())CeedVectorAXPBY_Cuda)); 805 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "PointwiseMult", CeedVectorPointwiseMult_Cuda)); 806 CeedCallBackend(CeedSetBackendFunction(ceed, "Vector", vec, "Destroy", CeedVectorDestroy_Cuda)); 807 808 CeedCallBackend(CeedCalloc(1, &impl)); 809 CeedCallBackend(CeedVectorSetData(vec, impl)); 810 811 return CEED_ERROR_SUCCESS; 812 } 813 814 //------------------------------------------------------------------------------ 815