Actual source code: petscdevice.h

  1: #pragma once

  3: #include <petscdevicetypes.h>
  4: #include <petscviewertypes.h>

  6: #if PETSC_CPP_VERSION >= 11 // C++11
  7:   #define PETSC_DEVICE_ALIGNOF(...) alignof(decltype(__VA_ARGS__))
  8: #elif PETSC_C_VERSION >= 11 // C11
  9:   #ifdef __GNUC__
 10:     #define PETSC_DEVICE_ALIGNOF(...) _Alignof(__typeof__(__VA_ARGS__))
 11:   #else
 12:     #include <stddef.h> // max_align_t
 13:     // Note we cannot just do _Alignof(expression) since clang warns that "'_Alignof' applied to an
 14:     // expression is a GNU extension", so we just default to max_align_t which is ultra safe
 15:     #define PETSC_DEVICE_ALIGNOF(...) _Alignof(max_align_t)
 16:   #endif // __GNUC__
 17: #else
 18:   #define PETSC_DEVICE_ALIGNOF(...) PETSC_MEMALIGN
 19: #endif

 21: /* SUBMANSEC = Sys */

 23: // REVIEW ME: this should probably go somewhere better, configure-time?
 24: #define PETSC_HAVE_HOST 1

 26: /* logging support */
 27: PETSC_EXTERN PetscClassId PETSC_DEVICE_CLASSID;
 28: PETSC_EXTERN PetscClassId PETSC_DEVICE_CONTEXT_CLASSID;

 30: PETSC_EXTERN PetscErrorCode PetscDeviceInitializePackage(void);
 31: PETSC_EXTERN PetscErrorCode PetscDeviceFinalizePackage(void);
 32: PETSC_EXTERN PetscErrorCode PetscGetMemType(const void *, PetscMemType *);

 34: /* PetscDevice */
 35: #if PetscDefined(HAVE_CXX)
 36: PETSC_EXTERN PetscErrorCode  PetscDeviceCreate(PetscDeviceType, PetscInt, PetscDevice *);
 37: PETSC_EXTERN PetscErrorCode  PetscDeviceDestroy(PetscDevice *);
 38: PETSC_EXTERN PetscErrorCode  PetscDeviceConfigure(PetscDevice);
 39: PETSC_EXTERN PetscErrorCode  PetscDeviceView(PetscDevice, PetscViewer);
 40: PETSC_EXTERN PetscErrorCode  PetscDeviceGetType(PetscDevice, PetscDeviceType *);
 41: PETSC_EXTERN PetscErrorCode  PetscDeviceGetDeviceId(PetscDevice, PetscInt *);
 42: PETSC_EXTERN PetscDeviceType PETSC_DEVICE_DEFAULT(void);
 43: PETSC_EXTERN PetscErrorCode  PetscDeviceSetDefaultDeviceType(PetscDeviceType);
 44: PETSC_EXTERN PetscErrorCode  PetscDeviceInitialize(PetscDeviceType);
 45: PETSC_EXTERN PetscBool       PetscDeviceInitialized(PetscDeviceType);
 46: #else
 47:   #define PetscDeviceCreate(PetscDeviceType, PetscInt, dev) (*(dev) = PETSC_NULLPTR, PETSC_SUCCESS)
 48:   #define PetscDeviceDestroy(dev)                           (*(dev) = PETSC_NULLPTR, PETSC_SUCCESS)
 49:   #define PetscDeviceConfigure(PetscDevice)                 PETSC_SUCCESS
 50:   #define PetscDeviceView(PetscDevice, PetscViewer)         PETSC_SUCCESS
 51:   #define PetscDeviceGetType(PetscDevice, type)             (*(type) = PETSC_DEVICE_DEFAULT(), PETSC_SUCCESS)
 52:   #define PetscDeviceGetDeviceId(PetscDevice, id)           (*(id) = 0, PETSC_SUCCESS)
 53:   #define PETSC_DEVICE_DEFAULT()                            PETSC_DEVICE_HOST
 54:   #define PetscDeviceSetDefaultDeviceType(PetscDeviceType)  PETSC_SUCCESS
 55:   #define PetscDeviceInitialize(PetscDeviceType)            PETSC_SUCCESS
 56:   #define PetscDeviceInitialized(dtype)                     ((dtype) == PETSC_DEVICE_HOST)
 57: #endif /* PetscDefined(HAVE_CXX) */

 59: /* PetscDeviceContext */
 60: #if PetscDefined(HAVE_CXX)
 61: PETSC_EXTERN PetscErrorCode PetscDeviceContextCreate(PetscDeviceContext *);
 62: PETSC_EXTERN PetscErrorCode PetscDeviceContextDestroy(PetscDeviceContext *);
 63: PETSC_EXTERN PetscErrorCode PetscDeviceContextSetStreamType(PetscDeviceContext, PetscStreamType);
 64: PETSC_EXTERN PetscErrorCode PetscDeviceContextGetStreamType(PetscDeviceContext, PetscStreamType *);
 65: PETSC_EXTERN PetscErrorCode PetscDeviceContextSetDevice(PetscDeviceContext, PetscDevice);
 66: PETSC_EXTERN PetscErrorCode PetscDeviceContextGetDevice(PetscDeviceContext, PetscDevice *);
 67: PETSC_EXTERN PetscErrorCode PetscDeviceContextGetDeviceType(PetscDeviceContext, PetscDeviceType *);
 68: PETSC_EXTERN PetscErrorCode PetscDeviceContextSetUp(PetscDeviceContext);
 69: PETSC_EXTERN PetscErrorCode PetscDeviceContextDuplicate(PetscDeviceContext, PetscDeviceContext *);
 70: PETSC_EXTERN PetscErrorCode PetscDeviceContextQueryIdle(PetscDeviceContext, PetscBool *);
 71: PETSC_EXTERN PetscErrorCode PetscDeviceContextWaitForContext(PetscDeviceContext, PetscDeviceContext);
 72: PETSC_EXTERN PetscErrorCode PetscDeviceContextForkWithStreamType(PetscDeviceContext, PetscStreamType, PetscInt, PetscDeviceContext **);
 73: PETSC_EXTERN PetscErrorCode PetscDeviceContextFork(PetscDeviceContext, PetscInt, PetscDeviceContext **);
 74: PETSC_EXTERN PetscErrorCode PetscDeviceContextJoin(PetscDeviceContext, PetscInt, PetscDeviceContextJoinMode, PetscDeviceContext **);
 75: PETSC_EXTERN PetscErrorCode PetscDeviceContextSynchronize(PetscDeviceContext);
 76: PETSC_EXTERN PetscErrorCode PetscDeviceContextSetFromOptions(MPI_Comm, PetscDeviceContext);
 77: PETSC_EXTERN PetscErrorCode PetscDeviceContextView(PetscDeviceContext, PetscViewer);
 78: PETSC_EXTERN PetscErrorCode PetscDeviceContextViewFromOptions(PetscDeviceContext, PetscObject, const char name[]);
 79: PETSC_EXTERN PetscErrorCode PetscDeviceContextGetCurrentContext(PetscDeviceContext *);
 80: PETSC_EXTERN PetscErrorCode PetscDeviceContextSetCurrentContext(PetscDeviceContext);
 81: PETSC_EXTERN PetscErrorCode PetscDeviceContextGetStreamHandle(PetscDeviceContext, void **);
 82: #else
 83:   #define PetscDeviceContextCreate(dctx)                                                                            (*(dctx) = PETSC_NULLPTR, PETSC_SUCCESS)
 84:   #define PetscDeviceContextDestroy(dctx)                                                                           (*(dctx) = PETSC_NULLPTR, PETSC_SUCCESS)
 85:   #define PetscDeviceContextSetStreamType(PetscDeviceContext, PetscStreamType)                                      PETSC_SUCCESS
 86:   #define PetscDeviceContextGetStreamType(PetscDeviceContext, type)                                                 (*(type) = PETSC_STREAM_DEFAULT, PETSC_SUCCESS)
 87:   #define PetscDeviceContextSetDevice(PetscDeviceContext, PetscDevice)                                              PETSC_SUCCESS
 88:   #define PetscDeviceContextGetDevice(PetscDeviceContext, device)                                                   (*(device) = PETSC_NULLPTR, PETSC_SUCCESS)
 89:   #define PetscDeviceContextGetDeviceType(PetscDeviceContext, type)                                                 (*(type) = PETSC_DEVICE_DEFAULT(), PETSC_SUCCESS)
 90:   #define PetscDeviceContextSetUp(PetscDeviceContext)                                                               PETSC_SUCCESS
 91:   #define PetscDeviceContextDuplicate(PetscDeviceContextl, PetscDeviceContextr)                                     (*(PetscDeviceContextr) = PETSC_NULLPTR, PETSC_SUCCESS)
 92:   #define PetscDeviceContextQueryIdle(PetscDeviceContext, idle)                                                     (*(idle) = PETSC_TRUE, PETSC_SUCCESS)
 93:   #define PetscDeviceContextWaitForContext(PetscDeviceContextl, PetscDeviceContextr)                                PETSC_SUCCESS
 94:   #define PetscDeviceContextForkWithStreamType(PetscDeviceContextp, PetscStreamType, PetscInt, PetscDeviceContextc) (*(PetscDeviceContextc) = PETSC_NULLPTR, PETSC_SUCCESS)
 95:   #define PetscDeviceContextFork(PetscDeviceContextp, PetscInt, PetscDeviceContextc)                                (*(PetscDeviceContextc) = PETSC_NULLPTR, PETSC_SUCCESS)
 96:   #define PetscDeviceContextJoin(PetscDeviceContextp, PetscInt, PetscDeviceContextJoinMode, PetscDeviceContextc)    (*(PetscDeviceContextc) = PETSC_NULLPTR, PETSC_SUCCESS)
 97:   #define PetscDeviceContextSynchronize(PetscDeviceContext)                                                         PETSC_SUCCESS
 98:   #define PetscDeviceContextSetFromOptions(MPI_Comm, PetscDeviceContext)                                            PETSC_SUCCESS
 99:   #define PetscDeviceContextView(PetscDeviceContext, PetscViewer)                                                   PETSC_SUCCESS
100:   #define PetscDeviceContextViewFromOptions(PetscDeviceContext, PetscObject, PetscViewer)                           PETSC_SUCCESS
101:   #define PetscDeviceContextGetCurrentContext(dctx)                                                                 (*(dctx) = PETSC_NULLPTR, PETSC_SUCCESS)
102:   #define PetscDeviceContextSetCurrentContext(PetscDeviceContext)                                                   PETSC_SUCCESS
103:   #define PetscDeviceContextGetStreamHandle(PetscDeviceContext, handle)                                             (*(handle) = PETSC_NULLPTR, PETSC_SUCCESS)
104: #endif /* PetscDefined(HAVE_CXX) */

106: /* memory */
107: #if PetscDefined(HAVE_CXX)
108: PETSC_EXTERN PetscErrorCode PetscDeviceAllocate_Private(PetscDeviceContext, PetscBool, PetscMemType, size_t, size_t, void **PETSC_RESTRICT);
109: PETSC_EXTERN PetscErrorCode PetscDeviceDeallocate_Private(PetscDeviceContext, void *PETSC_RESTRICT);
110: PETSC_EXTERN PetscErrorCode PetscDeviceMemcpy(PetscDeviceContext, void *PETSC_RESTRICT, const void *PETSC_RESTRICT, size_t);
111: PETSC_EXTERN PetscErrorCode PetscDeviceMemset(PetscDeviceContext, void *PETSC_RESTRICT, PetscInt, size_t);
112: #else
113:   #include <string.h> // memset()
114:   #define PetscDeviceAllocate_Private(PetscDeviceContext, clear, PetscMemType, size, alignment, ptr) PetscMallocA(1, (clear), __LINE__, PETSC_FUNCTION_NAME, __FILE__, (size), (ptr))
115:   #define PetscDeviceDeallocate_Private(PetscDeviceContext, ptr)                                     PetscFree(ptr)
116:   #define PetscDeviceMemcpy(PetscDeviceContext, dest, src, size)                                     PetscMemcpy((dest), (src), (size))
117:   #define PetscDeviceMemset(PetscDeviceContext, ptr, v, size)                                        ((void)memset((ptr), (unsigned char)(v), (size)), PETSC_SUCCESS)
118: #endif /* PetscDefined(HAVE_CXX) */

120: /*MC
121:   PetscDeviceMalloc - Allocate device-aware memory

123:   Synopsis:
124: #include <petscdevice.h>
125:   PetscErrorCode PetscDeviceMalloc(PetscDeviceContext dctx, PetscMemType mtype, size_t n, Type **ptr)

127:   Not Collective, Asynchronous, Auto-dependency aware

129:   Input Parameters:
130: + dctx  - The `PetscDeviceContext` used to allocate the memory
131: . mtype - The type of memory to allocate
132: - n     - The amount (in elements) to allocate

134:   Output Parameter:
135: . ptr - The pointer to store the result in

137:   Level: beginner

139:   Notes:
140:   Memory allocated with this function must be freed with `PetscDeviceFree()`.

142:   If `n` is zero, then `ptr` is set to `PETSC_NULLPTR`.

144:   This routine falls back to using `PetscMalloc1()` if PETSc was not configured with device
145:   support. The user should note that `mtype` is ignored in this case, as `PetscMalloc1()`
146:   allocates only host memory.

148:   This routine uses the `sizeof()` of the memory type requested to determine the total memory
149:   to be allocated, therefore you should not multiply the number of elements requested by the
150:   `sizeof()` the type\:

152: .vb
153:   PetscInt *arr;

155:   // correct
156:   PetscDeviceMalloc(dctx,PETSC_MEMTYPE_DEVICE,n,&arr);

158:   // incorrect
159:   PetscDeviceMalloc(dctx,PETSC_MEMTYPE_DEVICE,n*sizeof(*arr),&arr);
160: .ve

162:   Note result stored `ptr` is immediately valid and the user may freely inspect or manipulate
163:   its value on function return, i.e.\:

165: .vb
166:   PetscInt *ptr;

168:   PetscDeviceMalloc(dctx, PETSC_MEMTYPE_DEVICE, 20, &ptr);

170:   PetscInt *sub_ptr = ptr + 10; // OK, no need to synchronize

172:   ptr[0] = 10; // ERROR, directly accessing contents of ptr is undefined until synchronization
173: .ve

175:   DAG representation:
176: .vb
177:   time ->

179:   -> dctx - |= CALL =| -\- dctx -->
180:                          \- ptr ->
181: .ve

183: .N ASYNC_API

185: .seealso: `PetscDeviceFree()`, `PetscDeviceCalloc()`, `PetscDeviceArrayCopy()`,
186: `PetscDeviceArrayZero()`
187: M*/
188: #define PetscDeviceMalloc(dctx, mtype, n, ptr) PetscDeviceAllocate_Private((dctx), PETSC_FALSE, (mtype), (size_t)(n) * sizeof(**(ptr)), PETSC_DEVICE_ALIGNOF(**(ptr)), (void **)(ptr))

190: /*MC
191:   PetscDeviceCalloc - Allocate zeroed device-aware memory

193:   Synopsis:
194: #include <petscdevice.h>
195:   PetscErrorCode PetscDeviceCalloc(PetscDeviceContext dctx, PetscMemType mtype, size_t n, Type **ptr)

197:   Not Collective, Asynchronous, Auto-dependency aware

199:   Input Parameters:
200: + dctx  - The `PetscDeviceContext` used to allocate the memory
201: . mtype - The type of memory to allocate
202: - n     - The amount (in elements) to allocate

204:   Output Parameter:
205: . ptr - The pointer to store the result in

207:   Level: beginner

209:   Notes:
210:   Has identical usage to `PetscDeviceMalloc()` except that the memory is zeroed before it is
211:   returned. See `PetscDeviceMalloc()` for further discussion.

213:   This routine falls back to using `PetscCalloc1()` if PETSc was not configured with device
214:   support. The user should note that `mtype` is ignored in this case, as `PetscCalloc1()`
215:   allocates only host memory.

217: .N ASYNC_API

219: .seealso: `PetscDeviceFree()`, `PetscDeviceMalloc()`, `PetscDeviceArrayCopy()`,
220: `PetscDeviceArrayZero()`
221: M*/
222: #define PetscDeviceCalloc(dctx, mtype, n, ptr) PetscDeviceAllocate_Private((dctx), PETSC_TRUE, (mtype), (size_t)(n) * sizeof(**(ptr)), PETSC_DEVICE_ALIGNOF(**(ptr)), (void **)(ptr))

224: /*MC
225:   PetscDeviceFree - Free device-aware memory obtained with  `PetscDeviceMalloc()` or `PetscDeviceCalloc()`

227:   Synopsis:
228: #include <petscdevice.h>
229:   PetscErrorCode PetscDeviceFree(PetscDeviceContext dctx, void *ptr)

231:   Not Collective, Asynchronous, Auto-dependency aware

233:   Input Parameters:
234: + dctx - The `PetscDeviceContext` used to free the memory
235: - ptr  - The pointer to free, may be `NULL`

237:   Level: beginner

239:   Notes:
240:   `ptr` is set to `PETSC_NULLPTR` on successful deallocation.

242:   `ptr` must have been allocated using `PetscDeviceMalloc()`, `PetscDeviceCalloc()` not `PetscMalloc()` or related routines

244:   This routine falls back to using `PetscFree()` if PETSc was not configured with device
245:   support. The user should note that `PetscFree()` frees only host memory.

247:   DAG representation:
248: .vb
249:   time ->

251:   -> dctx -/- |= CALL =| - dctx ->
252:   -> ptr -/
253: .ve

255: .N ASYNC_API

257: .seealso: `PetscDeviceMalloc()`, `PetscDeviceCalloc()`
258: M*/
259: #define PetscDeviceFree(dctx, ptr) ((PetscErrorCode)(PetscDeviceDeallocate_Private((dctx), (ptr)) || ((ptr) = PETSC_NULLPTR, PETSC_SUCCESS)))

261: /*MC
262:   PetscDeviceArrayCopy - Copy memory in a device-aware manner

264:   Synopsis:
265: #include <petscdevice.h>
266:   PetscErrorCode PetscDeviceArrayCopy(PetscDeviceContext dctx, void *dest, const void *src, size_t n)

268:   Not Collective, Asynchronous, Auto-dependency aware

270:   Input Parameters:
271: + dctx - The `PetscDeviceContext` used to copy the memory
272: . dest - The pointer to copy to
273: . src  - The pointer to copy from
274: - n    - The amount (in elements) to copy

276:   Notes:
277:   Both `dest` and `src` must have been allocated using `PetscDeviceMalloc()` or
278:   `PetscDeviceCalloc()`.

280:   This uses the `sizeof()` of the `src` memory type requested to determine the total memory to
281:   be copied, therefore you should not multiply the number of elements by the `sizeof()` the
282:   type\:

284: .vb
285:   PetscInt *to,*from;

287:   // correct
288:   PetscDeviceArrayCopy(dctx,to,from,n);

290:   // incorrect
291:   PetscDeviceArrayCopy(dctx,to,from,n*sizeof(*from));
292: .ve

294:   See `PetscDeviceMemcpy()` for further discussion.

296:   Level: beginner

298: .N ASYNC_API

300: .seealso: `PetscDeviceMalloc()`, `PetscDeviceCalloc()`, `PetscDeviceFree()`,
301: `PetscDeviceArrayZero()`, `PetscDeviceMemcpy()`
302: M*/
303: #define PetscDeviceArrayCopy(dctx, dest, src, n) PetscDeviceMemcpy((dctx), (dest), (src), (size_t)(n) * sizeof(*(src)))

305: /*MC
306:   PetscDeviceArrayZero - Zero memory in a device-aware manner

308:   Synopsis:
309: #include <petscdevice.h>
310:   PetscErrorCode PetscDeviceArrayZero(PetscDeviceContext dctx, void *ptr, size_t n)

312:   Not Collective, Asynchronous, Auto-dependency aware

314:   Input Parameters:
315: + dctx  - The `PetscDeviceContext` used to zero the memory
316: . ptr   - The pointer to the memory
317: - n     - The amount (in elements) to zero

319:   Level: beginner

321:   Notes:
322:   `ptr` must have been allocated using `PetscDeviceMalloc()` or `PetscDeviceCalloc()`.

324:   This uses the `sizeof()` of the memory type requested to determine the total memory to be
325:   zeroed, therefore you should not multiply the number of elements by the `sizeof()` the type\:

327: .vb
328:   PetscInt *ptr;

330:   // correct
331:   PetscDeviceArrayZero(dctx,ptr,n);

333:   // incorrect
334:   PetscDeviceArrayZero(dctx,ptr,n*sizeof(*ptr));
335: .ve

337:   See `PetscDeviceMemset()` for further discussion.

339: .N ASYNC_API

341: .seealso: `PetscDeviceMalloc()`, `PetscDeviceCalloc()`, `PetscDeviceFree()`,
342: `PetscDeviceArrayCopy()`, `PetscDeviceMemset()`
343: M*/
344: #define PetscDeviceArrayZero(dctx, ptr, n) PetscDeviceMemset((dctx), (ptr), 0, (size_t)(n) * sizeof(*(ptr)))