1 // Copyright (c) 2017-2018, Lawrence Livermore National Security, LLC. 2 // Produced at the Lawrence Livermore National Laboratory. LLNL-CODE-734707. 3 // All Rights reserved. See files LICENSE and NOTICE for details. 4 // 5 // This file is part of CEED, a collection of benchmarks, miniapps, software 6 // libraries and APIs for efficient high-order finite element and spectral 7 // element discretizations for exascale applications. For more information and 8 // source code availability see http://github.com/ceed. 9 // 10 // The CEED research is supported by the Exascale Computing Project 17-SC-20-SC, 11 // a collaborative effort of two U.S. Department of Energy organizations (Office 12 // of Science and the National Nuclear Security Administration) responsible for 13 // the planning and preparation of a capable exascale ecosystem, including 14 // software, applications, hardware, advanced system engineering and early 15 // testbed platforms, in support of the nation's exascale computing imperative. 16 17 #include <string.h> 18 #include "ceed-cuda-common.h" 19 20 //------------------------------------------------------------------------------ 21 // Device information backend init 22 //------------------------------------------------------------------------------ 23 int CeedCudaInit(Ceed ceed, const char *resource) { 24 int ierr; 25 const char *device_spec = strstr(resource, ":device_id="); 26 const int device_id = (device_spec) ? atoi(device_spec + 11) : -1; 27 28 int current_device_id; 29 ierr = cudaGetDevice(¤t_device_id); CeedChk_Cu(ceed, ierr); 30 if (device_id >= 0 && current_device_id != device_id) { 31 ierr = cudaSetDevice(device_id); CeedChk_Cu(ceed, ierr); 32 current_device_id = device_id; 33 } 34 Ceed_Cuda *data; 35 ierr = CeedGetData(ceed, &data); CeedChkBackend(ierr); 36 data->device_id = current_device_id; 37 ierr = cudaGetDeviceProperties(&data->device_prop, current_device_id); 38 CeedChk_Cu(ceed, ierr); 39 return CEED_ERROR_SUCCESS; 40 } 41 42 //------------------------------------------------------------------------------ 43 // Backend destroy 44 //------------------------------------------------------------------------------ 45 int CeedDestroy_Cuda(Ceed ceed) { 46 int ierr; 47 Ceed_Cuda *data; 48 ierr = CeedGetData(ceed, &data); CeedChkBackend(ierr); 49 if (data->cublas_handle) { 50 ierr = cublasDestroy(data->cublas_handle); CeedChk_Cublas(ceed, ierr); 51 } 52 ierr = CeedFree(&data); CeedChkBackend(ierr); 53 return CEED_ERROR_SUCCESS; 54 } 55 56 //------------------------------------------------------------------------------ 57