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Mpi: A Standard Message Passing Interface
- Supercomputer
, 1996
"... ion Communicators provide support for the design of safe, modular software libraries. Here "safe" means that messages intended for receipt by a particular receive call in an application will not be incorrectly intercepted by a different receive call. Thus, communicators are a powerful mechanism for ..."
Abstract
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ion Communicators provide support for the design of safe, modular software libraries. Here "safe" means that messages intended for receipt by a particular receive call in an application will not be incorrectly intercepted by a different receive call. Thus, communicators are a powerful mechanism for avoiding unintentional non-determinism in message passing. This may be a particular problem when using third-party software libraries that perform message passing. The point here is that the application developer has no way of knowing if the tag, group, and rank completely disambiguate the message traffic of different libraries and the rest of the application. Communicator arguments are passed to all MPI message passing routines, and a message can be communicated only if the communicator arguments passed to the send and receive routines match. Thus, in effect communicators provide an additional criterion for message selection, and hence permit the construction of independent tag spaces. If...
Document for a Standard Message-Passing Interface
, 1993
"... this document, along with a brief description of each. ..."
Scientific and Engineering Computation
"... this document, the rationale for design choices made in the interface specification is set off in this format. Some readers may wish to skip these sections, while readers interested in interface design may want to read them carefully. (End of rationale.) Advice to users. Throughout this document, m ..."
Abstract
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this document, the rationale for design choices made in the interface specification is set off in this format. Some readers may wish to skip these sections, while readers interested in interface design may want to read them carefully. (End of rationale.) Advice to users. Throughout this document, material that speaks to users and illustrates usage is set off in this format. Some readers may wish to skip these sections, while readers interested in programming in MPI may want to read them carefully. (End of advice to users.) Advice to implementors. Throughout this document, material that is primarily commentary to implementors is set off in this format. Some readers may wish to skip these sections, while readers interested in MPI implementations may want to read them carefully. (End of advice to implementors.) 1.7.2 Procedure Specification MPI procedures are specified using a language independent notation. The arguments of procedure calls are marked as IN, OUT or INOUT. The meanings of these are: ffl the call uses but does not update an argument marked IN, ffl the call may update an argument marked OUT, ffl the call both uses and updates an argument marked INOUT
