1 #if !defined(PETSCVEC_KOKKOS_HPP) 2 #define PETSCVEC_KOKKOS_HPP 3 4 #include <petscconf.h> 5 6 /* SUBMANSEC = Vec */ 7 8 #if defined(PETSC_HAVE_KOKKOS) 9 #if defined(petsccomplexlib) 10 #error "Error: You must include petscvec_kokkos.hpp before other petsc headers in this C++ file to use petsc complex with Kokkos" 11 #endif 12 13 #define PETSC_DESIRE_KOKKOS_COMPLEX 1 /* To control the definition of petsccomplexlib in petscsystypes.h */ 14 #endif 15 16 #include <petscvec.h> 17 18 #if defined(PETSC_HAVE_KOKKOS) 19 #include <Kokkos_Core.hpp> 20 21 /*@C 22 VecGetKokkosView - Returns a constant Kokkos View that contains up-to-date data of a vector in the specified memory space. 23 24 Synopsis: 25 #include <petscvec_kokkos.hpp> 26 PetscErrorCode VecGetKokkosView (Vec v,Kokkos::View<const PetscScalar*,MemorySpace>* kv); 27 PetscErrorCode VecGetKokkosView (Vec v,Kokkos::View<PetscScalar*,MemorySpace>* kv); 28 29 Logically Collective on Vec 30 31 Input Parameter: 32 . v - the vector in type of `VECKOKKOS` 33 34 Output Parameter: 35 . kv - the Kokkos View with a user-specified template parameter MemorySpace 36 37 Notes: 38 If the vector is not of type `VECKOKKOS`, an error will be raised. 39 40 The functions are similar to `VecGetArrayRead()` and `VecGetArray()` respectively. One can read-only or read/write the returned Kokkos View. 41 42 Passing in a const View enables read-only access. 43 44 One must return the View by a matching `VecRestoreKokkosView()` after finishing using the View. Currently, only two memory 45 spaces are supported: Kokkos::HostSpace and Kokkos::DefaultExecutionSpace::memory_space. 46 If needed, a memory copy will be internally called to copy the latest vector data to the specified memory space. 47 48 Level: beginner 49 50 .seealso: `VecRestoreKokkosView()`, `VecRestoreArray()`, `VecGetKokkosViewWrite()`, `VecGetArrayRead()`, `VecGetArrays()`, `VecGetArrayF90()`, `VecGetArrayReadF90()`, `VecPlaceArray()`, `VecGetArray2d()`, 51 `VecGetArrayPair()`, `VecRestoreArrayPair()`, `VecGetArrayWrite()`, `VecRestoreArrayWrite()` 52 @*/ 53 template <class MemorySpace> 54 PetscErrorCode VecGetKokkosView(Vec, Kokkos::View<const PetscScalar *, MemorySpace> *); 55 template <class MemorySpace> 56 PetscErrorCode VecGetKokkosView(Vec, Kokkos::View<PetscScalar *, MemorySpace> *); 57 58 /*@C 59 VecRestoreKokkosView - Returns a Kokkos View gotten by `VecGetKokkosView()`. 60 61 Synopsis: 62 #include <petscvec_kokkos.hpp> 63 PetscErrorCode VecRestoreKokkosView (Vec v,Kokkos::View<const PetscScalar*,MemorySpace>* kv); 64 PetscErrorCode VecRestoreKokkosView (Vec v,Kokkos::View<PetscScalar*,MemorySpace>* kv); 65 66 Logically Collective on Vec 67 68 Input Parameters: 69 + v - the vector in type of `VECKOKKOS` 70 - kv - the Kokkos View with a user-specified template parameter MemorySpace 71 72 Notes: 73 If the vector is not of type `VECKOKKOS`, an error will be raised. 74 The functions are similar to `VecRestoreArrayRead()` and `VecRestoreArray()` respectively. They are the counterpart of `VecGetKokkosView()`. 75 76 Level: beginner 77 78 .seealso: `VecGetKokkosView()`, `VecRestoreKokkosViewWrite()`, `VecRestoreArray()`, `VecGetArrayRead()`, `VecGetArrays()`, `VecGetArrayF90()`, `VecGetArrayReadF90()`, `VecPlaceArray()`, `VecGetArray2d()`, 79 `VecGetArrayPair()`, `VecRestoreArrayPair()`, `VecGetArrayWrite()`, `VecRestoreArrayWrite()` 80 @*/ 81 template <class MemorySpace> 82 PetscErrorCode VecRestoreKokkosView(Vec, Kokkos::View<const PetscScalar *, MemorySpace> *) { 83 return 0; 84 } 85 template <class MemorySpace> 86 PetscErrorCode VecRestoreKokkosView(Vec, Kokkos::View<PetscScalar *, MemorySpace> *); 87 88 /*@C 89 VecGetKokkosViewWrite - Returns a Kokkos View that contains the array of a vector in the specified memory space. 90 91 Synopsis: 92 #include <petscvec_kokkos.hpp> 93 PetscErrorCode VecGetKokkosViewWrite (Vec v,Kokkos::View<PetscScalar*,MemorySpace>* kv); 94 95 Logically Collective on Vec 96 97 Input Parameter: 98 . v - the vector in type of `VECKOKKOS` 99 100 Output Parameter: 101 . kv - the Kokkos View with a user-specified template parameter MemorySpace 102 103 Notes: 104 If the vector is not of type `VECKOKKOS`, an error will be raised. 105 106 The functions is similar to `VecGetArrayWrite()`. The returned view might contain garbage data or stale data and one is not 107 expected to read data from the View. Instead, one is expected to overwrite all data in the View. 108 One must return the View by a matching `VecRestoreKokkosViewWrite()` after finishing using the View. 109 110 Currently, only two memory spaces are supported: Kokkos::HostSpace and Kokkos::DefaultExecutionSpace::memory_space. 111 112 Level: beginner 113 114 .seealso: `VecRestoreKokkosViewWrite()`, `VecRestoreKokkosView()`, `VecGetKokkosView()`, `VecRestoreArray()`, `VecGetArrayRead()`, `VecGetArrays()`, `VecGetArrayF90()`, `VecGetArrayReadF90()`, `VecPlaceArray()`, `VecGetArray2d()`, 115 `VecGetArrayPair()`, `VecRestoreArrayPair()`, `VecGetArrayWrite()`, `VecRestoreArrayWrite()` 116 @*/ 117 template <class MemorySpace> 118 PetscErrorCode VecGetKokkosViewWrite(Vec, Kokkos::View<PetscScalar *, MemorySpace> *); 119 120 /*@C 121 VecRestoreKokkosViewWrite - Returns a Kokkos View gotten with `VecGetKokkosViewWrite()`. 122 123 Synopsis: 124 #include <petscvec_kokkos.hpp> 125 PetscErrorCode VecRestoreKokkosViewWrite (Vec v,Kokkos::View<PetscScalar*,MemorySpace>* kv); 126 127 Logically Collective on Vec 128 129 Input Parameters: 130 + v - the vector in type of `VECKOKKOS` 131 - kv - the Kokkos View with a user-specified template parameter MemorySpace 132 133 Notes: 134 If the vector is not of type `VECKOKKOS`, an error will be raised. 135 136 The function is similar to `VecRestoreArrayWrite()`. It is the counterpart of `VecGetKokkosViewWrite()`. 137 138 Level: beginner 139 140 .seealso: `VecGetKokkosViewWrite()`, `VecGetKokkosView()`, `VecGetKokkosView()`, `VecRestoreArray()`, `VecGetArrayRead()`, `VecGetArrays()`, `VecGetArrayF90()`, `VecGetArrayReadF90()`, `VecPlaceArray()`, `VecGetArray2d()`, 141 `VecGetArrayPair()`, `VecRestoreArrayPair()`, `VecGetArrayWrite()`, `VecRestoreArrayWrite()` 142 @*/ 143 template <class MemorySpace> 144 PetscErrorCode VecRestoreKokkosViewWrite(Vec, Kokkos::View<PetscScalar *, MemorySpace> *); 145 146 #if defined(PETSC_HAVE_COMPLEX) && defined(PETSC_USE_COMPLEX) 147 static_assert(std::alignment_of<Kokkos::complex<PetscReal>>::value == std::alignment_of<std::complex<PetscReal>>::value, 148 "Alignment of Kokkos::complex<PetscReal> and std::complex<PetscReal> mismatch. Reconfigure your Kokkos with -DKOKKOS_ENABLE_COMPLEX_ALIGN=OFF, or let PETSc install Kokkos for you with --download-kokkos --download-kokkos-kernels"); 149 #endif 150 151 #endif 152 153 #endif 154