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681. FFTW - Calling FFTW from Fortran | PARALLEL.RU - Информационно-аналитический
... FFTW - Calling FFTW from Fortran . ... Fortran has no generic pointer type.) ... In Fortran, you use the following to accomplish the same thing: double complex in, out dimension in(N), out(N) integer plan call fftw_f77_create_plan(plan,N,FFTW_FORWARD,FFTW_ESTIMATE) call fftw_f77_one(plan,in,out) call fftw_f77_destroy_plan(plan) . Notice how all routines are called as Fortran subroutines, and the plan is returned via the first argument to fftw_f77_create_plan . ... Центры . ...
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Ссылки http://www.parallel.ru/docs/FFTW/fftw_5.html -- 25.0 Кб -- 09.04.2016
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682. FFTW - Parallel FFTW | PARALLEL.RU - Информационно-аналитический центр по
... FFTW - Parallel FFTW . ... The FFTW package currently contains three parallel transform implementations that leverage the uniprocessor FFTW code: . The first set of routines utilizes shared-memory threads for parallel one- and multi-dimensional transforms of both real and complex data. ... The mpi directory contains multi-dimensional transforms of real and complex data for parallel machines supporting MPI. It also includes parallel one-dimensional transforms for complex data. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/FFTW/fftw_4.html -- 53.3 Кб -- 09.04.2016
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683. FFTW - FFTW Reference | PARALLEL.RU - Информационно-аналитический центр по
... FFTW - FFTW Reference . ... Then, in four sections, we explain the FFTW program interface for complex one-dimensional transforms (see Section One-dimensional Transforms Reference ), complex multi-dimensional transforms (see Section Multi-dimensional Transforms Reference ), and real one-dimensional transforms (see Section Real One-dimensional Transforms Reference ), real multi-dimensional transforms (see Section Real Multi-dimensional Transforms Reference ). ... Центры . ...
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Ссылки http://www.parallel.ru/docs/FFTW/fftw_3.html -- 77.6 Кб -- 09.04.2016
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684. FFTW - Tutorial | PARALLEL.RU - Информационно-аналитический центр по
... FFTW - Tutorial . ... This chapter describes the basic usage of FFTW, i.e., how to compute the Fourier transform of a single array. ... Section Words of Wisdom shows how you can save FFTW's plans for future use. ... The transform itself is computed by passing the plan along with the input and output arrays to fftw_one : void fftw_one(fftw_plan plan, fftw_complex *in, fftw_complex *out); . ... We access the complex outputs of the in-place transforms by casting each real array to a fftw_complex...
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Ссылки http://www.parallel.ru/docs/FFTW/fftw_2.html -- 56.1 Кб -- 09.04.2016
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685. FFTW - Introduction | PARALLEL.RU - Информационно-аналитический центр по
... FFTW - Introduction . ... This manual documents version 2.1.3 of FFTW, the Fastest Fourier Transform in the West . FFTW is a comprehensive collection of fast C routines for computing the discrete Fourier transform (DFT) in one or more dimensions, of both real and complex data, and of arbitrary input size. FFTW also includes parallel transforms for both shared- and distributed-memory systems. ... Parallel transforms are discussed in their own chapter Section Parallel FFTW . ... Центры . ...
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Ссылки http://www.parallel.ru/docs/FFTW/fftw_1.html -- 21.8 Кб -- 09.04.2016
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686. Error Class for Invalid Keyval | PARALLEL.RU - Информационно-аналитический
... Error Class for Invalid Keyval . ... Key values for attributes are system-allocated, by MPI_{TYPE,COMM,WIN}_CREATE_KEYVAL. ... In order to signal that an erroneous key value has been passed to one of these functions, there is a new MPI error class: MPI_ERR_KEYVAL. ... The last three are included because keyval is an argument to the copy and delete functions for attributes. ... Return to MPI-2 Standard Index . MPI-2.0 of July 18, 1997 . ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node49.html -- 16.6 Кб -- 09.04.2016
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687. Committing a Committed Datatype | PARALLEL.RU - Информационно-аналитический
... Committing a Committed Datatype . Up: Miscellany Next: Allowing User Functions at Process Termination Previous: Error Class for Invalid Keyval . In MPI-1.2, the effect of calling MPI_TYPE_COMMIT with a datatype that is already committed is not specified. For MPI-2, it is specified that MPI_TYPE_COMMIT will accept a committed datatype; in this case, it is equivalent to a no-op. ... MPI-2.0 of July 18, 1997 . HTML Generated on August 11, 1997 . ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node50.html -- 16.6 Кб -- 09.04.2016
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688. True Extent of Datatypes | PARALLEL.RU - Информационно-аналитический центр по
... True Extent of Datatypes . Up: New Datatype Manipulation Functions Next: Subarray Datatype Constructor Previous: Extent and Bounds of Datatypes . ... MPI_TYPE_GET_TRUE_EXTENT(datatype, true_lb, true_extent) . ... int MPI_Type_get_true_extent(MPI_Datatype datatype, MPI_Aint *true_lb, MPI_Aint *true_extent) . MPI_TYPE_GET_TRUE_EXTENT(DATATYPE, TRUE_LB, TRUE_EXTENT, IERROR) . ... void MPI::Datatype::Get_true_extent(MPI::Aint& true_lb, MPI::Aint& true_extent) const . ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node78.html -- 18.2 Кб -- 09.04.2016
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689. Non-destructive Test of status | PARALLEL.RU - Информационно-аналитический
... Non-destructive Test of status . ... This call is useful for accessing the information associated with a request, without freeing the request (in case the user is expected to access it later). ... MPI_REQUEST_GET_STATUS( request, flag, status ) . ... int MPI_Request_get_status(MPI_Request request, int *flag, MPI_Status *status) . MPI_REQUEST_GET_STATUS( REQUEST, FLAG, STATUS, IERROR) . ... Sets flag=true if the operation is complete, and, if so, returns in status the request status. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node48.html -- 17.2 Кб -- 09.04.2016
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690. Extent and Bounds of Datatypes | PARALLEL.RU - Информационно-аналитический
... Extent and Bounds of Datatypes . Up: New Datatype Manipulation Functions Next: True Extent of Datatypes Previous: Type Constructors with Explicit Addresses . ... MPI allows one to change the extent of a datatype, using lower bound and upper bound markers ( MPI_LB and MPI_UB). ... Returns in newtype a handle to a new datatype that is identical to oldtype, except that the lower bound of this new datatype is set to be lb, and its upper bound is set to be lb + extent. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node77.html -- 19.2 Кб -- 09.04.2016
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691. Allowing User Functions at Process Termination | PARALLEL.RU -
... Allowing User Functions at Process Termination . ... There are times in which it would be convenient to have actions happen when an MPI process finishes. For example, a routine may do initializations that are useful until the MPI job (or that part of the job that being terminated in the case of dynamically created processes) is finished. This can be accomplished in MPI-2 by attaching an attribute to MPI_COMM_SELF with a callback function. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node51.html -- 17.2 Кб -- 09.04.2016
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692. Subarray Datatype Constructor | PARALLEL.RU - Информационно-аналитический центр
... Subarray Datatype Constructor . Up: New Datatype Manipulation Functions Next: Distributed Array Datatype Constructor Previous: True Extent of Datatypes . MPI_TYPE_CREATE_SUBARRAY(ndims, array_of_sizes, array_of_subsizes, array_of_starts, order, oldtype, newtype) . ... IN order] array storage order flag (state) . ... int MPI_Type_create_subarray(int ndims, int array_of_sizes[], int array_of_subsizes[], int array_of_starts[], int order, MPI_Datatype oldtype, MPI_Datatype *newtype) . ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node79.html -- 20.7 Кб -- 09.04.2016
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693. Type Constructors with Explicit Addresses | PARALLEL.RU -
... Type Constructors with Explicit Addresses . ... The new functions are synonymous with the old functions in C/C++, or on Fortran systems where default INTEGERs are address sized. ... In Fortran, these functions accept arguments of type INTEGER(KIND=MPI_ADDRESS_KIND) , wherever arguments of type MPI_Aint are used in C. On Fortran 77 systems that do not support the Fortran 90 KIND notation, and where addresses are 64 bits whereas default INTEGERs are 32 bits, these arguments will be of type INTEGER*8. ...
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Ссылки http://www.parallel.ru/docs/mpi2/node76.html -- 21.3 Кб -- 09.04.2016
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694. Determining Whether MPI Has Finished | PARALLEL.RU -
... Determining Whether MPI Has Finished . ... In order for a library to do this cleanly, it needs to know if MPI is active. ... MPI is ``active'' and it is thus safe to call MPI functions if MPI_INIT has completed and MPI_FINALIZE has not completed. If a library has no other way of knowing whether MPI is active or not, then it can use MPI_INITIALIZED and MPI_FINALIZED to determine this. For example, MPI is ``active'' in callback functions that are invoked during MPI_FINALIZE. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node52.html -- 17.3 Кб -- 09.04.2016
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695. Error Handlers for Files | PARALLEL.RU - Информационно-аналитический центр по
... Error Handlers for Files . ... MPI_FILE_CREATE_ERRHANDLER(function, errhandler) . ... int MPI_File_create_errhandler(MPI_File_errhandler_fn *function, MPI_Errhandler *errhandler) . ... SUBROUTINE FILE_ERRHANDLER_FN(FILE, ERROR_CODE, .. ... IN errhandler] new error handler for file (handle) . ... The error handler must be either a predefined error handler, or an error handler created by a call to MPI_FILE_CREATE_ERRHANDLER. ... OUT errhandler] error handler currently associated with file (handle) . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node74.html -- 18.3 Кб -- 09.04.2016
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696. Treatment of MPI_Status | PARALLEL.RU - Информационно-аналитический центр по
... Treatment of MPI_Status . Up: Miscellany Next: Passing MPI_STATUS_IGNORE for Status Previous: Datatype Constructor MPI_TYPE_CREATE_INDEXED_BLOCK . The following features add to, but do not change, the functionality associated with MPI_STATUS. ... MPI-2.0 of July 18, 1997 . HTML Generated on August 11, 1997 . ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node46.html -- 16.0 Кб -- 09.04.2016
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697. Extra State | PARALLEL.RU - Информационно-аналитический центр по параллельным
... Extra State . ... Extra-state should not be modified by the copy or delete callback functions. ... However, these functions may update state that is indirectly accessed via extra-state. E.g., in C, extra-state can be a pointer to a data structure that is modified by the copy or callback functions; in Fortran, extra-state can be an index into an entry in a COMMON array that is modified by the copy or callback functions. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node68.html -- 16.5 Кб -- 09.04.2016
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698. Wide Characters | PARALLEL.RU - Информационно-аналитический центр по
... Wide Characters . Up: New Predefined Datatypes Next: Signed Characters and Reductions Previous: New Predefined Datatypes . A new datatype, MPI_WCHAR, is added, for the purpose of dealing with international character sets such as Unicode. ... The fact that MPI_CHAR is associated with the C datatype char , which in turn is often used as a substitute for the ``missing'' byte datatype in C makes it most natural to define this as a new datatype specifically for multi-byte characters. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node82.html -- 16.5 Кб -- 09.04.2016
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699. Distributed Array Datatype Constructor | PARALLEL.RU -
... Distributed Array Datatype Constructor . ... The distributed array type constructor supports HPF-like [ 12 ] data distributions. ... MPI_TYPE_CREATE_DARRAY(size, rank, ndims, array_of_gsizes, array_of_distribs, array_of_dargs, array_of_psizes, order, oldtype, newtype) . ... IN array_of_gsizes] number of elements of type oldtype in each dimension of global array (array of positive integers) . ... IN oldtype] old datatype (handle) . ... See Example Distributed Array Datatype Constructor .) ... Центры ...
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Ссылки http://www.parallel.ru/docs/mpi2/node80.html -- 25.8 Кб -- 09.04.2016
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700. New Datatype Manipulation Functions | PARALLEL.RU - Информационно-аналитический
... New Datatype Manipulation Functions . Up: Miscellany Next: Type Constructors with Explicit Addresses Previous: Error Handlers for Files . New functions are provided to supplement the type manipulation functions that have address sized integer arguments. ... Also, a new, more convenient type constructor is provided to modify the lower bound and extent of a datatype. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node75.html -- 16.5 Кб -- 09.04.2016
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