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741. Clarification of MPI_INTERCOMM_MERGE | PARALLEL.RU -
... Clarification of MPI_INTERCOMM_MERGE . Up: MPI-1.0 and MPI-1.1 Clarifications Next: Clarification of Binding of MPI_TYPE_SIZE Previous: Clarification of MPI_INTERCOMM_CREATE . ... 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/node35.html -- 16.2 Кб -- 09.04.2016
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742. Canonical MPI_PACK and MPI_UNPACK | PARALLEL.RU - Информационно-аналитический
... Canonical MPI_PACK and MPI_UNPACK . ... Their first arguments specify the data format, for future extensibility, but for MPI-2 the only valid value of the datarep argument is ``external32.' ... MPI_PACK_EXTERNAL(datarep, inbuf, incount, datatype, outbuf, outsize, position ) . ... int MPI_Pack_external(char *datarep, void *inbuf, int incount, MPI_Datatype datatype, void *outbuf, MPI_Aint outsize, MPI_Aint *position) . ... MPI_PACK_EXTERNAL_SIZE( datarep, incount, datatype, size ) . ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node85.html -- 19.7 Кб -- 09.04.2016
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743. Transfer of Handles | PARALLEL.RU - Информационно-аналитический центр по
... Transfer of Handles . ... There is no direct access to C++ objects from C. The type definition MPI_Fint is provided in C/C++ for an integer of the size that matches a Fortran INTEGER; usually, MPI_Fint will be equivalent to int. The following functions are provided in C to convert from a Fortran communicator handle (which is an integer) to a C communicator handle, and vice versa. ... void MPI_X_TYPE_COMMIT( MPI_Fint *f_handle, MPI_Fint *ierr) { MPI_Datatype datatype; . ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node59.html -- 23.2 Кб -- 09.04.2016
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744. Portable MPI Process Startup | PARALLEL.RU - Информационно-аналитический центр
... Portable MPI Process Startup . ... In order that the ``standard'' command not be confused with existing practice, which is not standard and not portable among implementations, instead of mpirun MPI specifies mpiexec . ... Instead, MPI specifies an mpiexec startup command and recommends but does not require it, as advice to implementors. ... mpiexec -n <numprocs> <program> be at least one way to start <program> with an initial MPI_COMM_WORLD whose group contains <numprocs> processes. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node42.html -- 21.2 Кб -- 09.04.2016
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745. Minor Corrections | PARALLEL.RU - Информационно-аналитический центр по
... Minor Corrections . ... The following corrections to MPI-1.1 are (all page and line numbers are for the June 12, 1995 version without changebars): . Page 11, line 36 reads . ... Page 19, lines 1--2 reads . ... Page 52, lines 46--48 read . ... Page 109, lines 26--27 and page 110, lines 28--29 reads . ... Page 117, lines 22--23 reads . ... Page 201, line 28 reads ...of different language bindings is is done .... but should read ...of different language bindings is done .. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node40.html -- 30.6 Кб -- 09.04.2016
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746. Error Handling | PARALLEL.RU - Информационно-аналитический центр по
... Error Handling . ... Whenever possible, such failures will be reflected as errors in the relevant communication call. ... Whenever possible, MPI calls return an error code if an error occurred during the call. ... The user may specify that no error is fatal, and handle error codes returned by MPI calls by himself or herself. Also, the user may provide his or her own error-handling routines, which will be invoked whenever an MPI call returns abnormally. ... MPI-2.0 of July 18, 1997 . ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node23.html -- 20.8 Кб -- 09.04.2016
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747. Language Binding | PARALLEL.RU - Информационно-аналитический центр по
... Language Binding . Up: MPI-2 Terms and Conventions Next: Deprecated Names and Functions Previous: File Offsets . This section defines the rules for MPI language binding in general and for Fortran, ANSI C, and C++, in particular. ... MPI bindings are for Fortran 90, though they are designed to be usable in Fortran 77 environments. ... Since Fortran is case insensitive, linkers may use either lower case or upper case when resolving Fortran names. ... Return to MPI-2 Standard Index . ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node17.html -- 16.9 Кб -- 09.04.2016
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748. Opaque Objects | PARALLEL.RU - Информационно-аналитический центр по
... Opaque Objects . ... Opaque objects are accessed via handles , which exist in user space. MPI procedures that operate on opaque objects are passed handle arguments to access these objects. ... In Fortran, the handle can be an index into a table of opaque objects in a system table; in C it can be such an index or a pointer to the object. ... An opaque object and its handle are significant only at the process where the object was created and cannot be transferred to another process. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node10.html -- 21.1 Кб -- 09.04.2016
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749. C++ Binding Issues | PARALLEL.RU - Информационно-аналитический центр по
... C++ Binding Issues . ... A cross index of these with the C++ names is given in Annex Language Binding . ... All MPI names are declared within the scope of a namespace called MPI and therefore are referenced with an MPI:: prefix. ... The names of MPI-2 functions generally follow the naming rules given. ... The C++ bindings presented in Annex MPI-1 C++ Language Binding and throughout this document were generated by applying a simple set of name generation rules to the MPI function specifications. ...
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Ссылки http://www.parallel.ru/docs/mpi2/node21.html -- 24.9 Кб -- 09.04.2016
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750. The Runtime Environment | PARALLEL.RU - Информационно-аналитический центр по
... The Runtime Environment . Up: The MPI-2 Process Model Next: Process Manager Interface Previous: Starting Processes . The MPI_COMM_SPAWN and MPI_COMM_SPAWN_MULTIPLE routines provide an interface between MPI and the runtime environment of an MPI application. The difficulty is that there is an enormous range of runtime environments and application requirements, and MPI must not be tailored to any particular one. Examples of such environments are: . ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node92.html -- 20.5 Кб -- 09.04.2016
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751. Clarification of MPI_INTERCOMM_CREATE | PARALLEL.RU -
... Clarification of MPI_INTERCOMM_CREATE . ... The Problem: The MPI-1.1 standard says, in the discussion of MPI_INTERCOMM_CREATE, both that The groups must be disjoint and that The leaders may be the same process. To further muddy the waters, the reason given for ``The groups must be disjoint'' is based on concerns about the implementation of MPI_INTERCOMM_CREATE that are not applicable for the case where the leaders are the same process. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node34.html -- 17.5 Кб -- 09.04.2016
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752. Functions and Macros | PARALLEL.RU - Информационно-аналитический центр по
... Functions and Macros . Up: Miscellany Next: Profiling Interface Previous: Canonical MPI_PACK and MPI_UNPACK . An implementation is allowed to implement MPI_WTIME, MPI_WTICK, PMPI_WTIME, PMPI_WTICK, and the handle-conversion functions ( MPI_Group_f2c, etc.) in Section Transfer of Handles , and no others, as macros in C. [] Advice to implementors. Implementors should document which routines are implemented as macros. End of advice to implementors. Advice to users. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node86.html -- 16.5 Кб -- 09.04.2016
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753. Miscellany | PARALLEL.RU - Информационно-аналитический центр по параллельным
... Miscellany . Up: Contents Next: Portable MPI Process Startup Previous: Minor Corrections . ... 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/node41.html -- 15.9 Кб -- 09.04.2016
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754. Independence of Basic Runtime Routines | PARALLEL.RU -
... Independence of Basic Runtime Routines . ... However, the following program is expected to complete in an ANSI C environment regardless of the size of MPI_COMM_WORLD (assuming that printf is available at the executing nodes). int rank; MPI_Init((void *)0, (void *)0); MPI_Comm_rank(MPI_COMM_WORLD, &rank); if (rank == 0) printf("Starting program\n"); MPI_Finalize(); The corresponding Fortran and C++ programs are also expected to complete. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node25.html -- 17.5 Кб -- 09.04.2016
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755. Implementation Issues | PARALLEL.RU - Информационно-аналитический центр по
... Implementation Issues . Up: MPI-2 Terms and Conventions Next: Independence of Basic Runtime Routines Previous: Error Handling . There are a number of areas where an MPI implementation may interact with the operating environment and system. While MPI does not mandate that any services (such as signal handling) be provided, it does strongly suggest the behavior to be provided if those services are available. ... Return to MPI-2 Standard Index . ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node24.html -- 16.2 Кб -- 09.04.2016
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756. Starting Processes | PARALLEL.RU - Информационно-аналитический центр по
... Starting Processes . Up: The MPI-2 Process Model Next: The Runtime Environment Previous: The MPI-2 Process Model . MPI applications may start new processes through an interface to an external process manager, which can range from a parallel operating system (CMOST) to layered software (POE) to an rsh command (p4). MPI_COMM_SPAWN starts MPI processes and establishes communication with them, returning an intercommunicator. ... A process is identified by a (group, rank) pair. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node91.html -- 16.5 Кб -- 09.04.2016
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757. Clarification of status after MPI_WAIT and MPI_TEST | PARALLEL.RU -
... Clarification of status after MPI_WAIT and MPI_TEST . ... The fields in a status object returned by a call to MPI_WAIT, MPI_TEST, or any of the other derived functions ( MPI_{TEST,WAIT}{ALL,SOME,ANY}), where the request corresponds to a send call, are undefined, with two exceptions: The error status field will contain valid information if the wait or test call returned with MPI_ERR_IN_STATUS; and the returned status can be queried by the call MPI_TEST_CANCELLED. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node33.html -- 16.9 Кб -- 09.04.2016
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758. Interaction with Signals | PARALLEL.RU - Информационно-аналитический центр по
... Interaction with Signals . Up: Implementation Issues Next: Examples Previous: Independence of Basic Runtime Routines . MPI does not specify the interaction of processes with signals and does not require that MPI be signal safe. ... Implementations may also prohibit the use of MPI calls from within signal handlers. ... High quality single-threaded implementations will be signal safe: an MPI call suspended by a signal will resume and complete normally after the signal is handled. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node26.html -- 16.6 Кб -- 09.04.2016
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759. Profiling Interface | PARALLEL.RU - Информационно-аналитический центр по
... Profiling Interface . Up: Miscellany Next: Process Creation and Management Previous: Functions and Macros . The profiling interface, as described in Chapter 8 of MPI-1.1, must be supported for all MPI-2 functions, except those allowed as macros (See Section Functions and Macros ). ... For routines implemented as macros, it is still required that the PMPI_ version be supplied and work as expected, but it is not possible to replace at link time the MPI_ version with a user-defined version. ...
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Ссылки http://www.parallel.ru/docs/mpi2/node87.html -- 16.5 Кб -- 09.04.2016
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760. Clarification of MPI_FINALIZE | PARALLEL.RU - Информационно-аналитический центр
... Clarification of MPI_FINALIZE . ... Each process must call MPI_FINALIZE before it exits. ... MPI_FINALIZE is collective on MPI_COMM_WORLD. ... Although it is not required that all processes return from MPI_FINALIZE, it is required that at least process 0 in MPI_COMM_WORLD return, so that users can know that the MPI portion of the computation is over. In addition, in a POSIX environment, they may desire to supply an exit code for each process that returns from MPI_FINALIZE. ... Центры . ...
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Ссылки http://www.parallel.ru/docs/mpi2/node32.html -- 22.8 Кб -- 09.04.2016
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