By William Gropp
Given that its unencumber in summer time 1994, the Message Passing Interface (MPI) specification has turn into a regular for message-passing libraries for parallel computations. There exist greater than a dozen implementations on numerous computing systems, from the IBM SP-2 supercomputer to computers working home windows NT. The MPI discussion board, which has persevered to paintings on MPI, has lately published MPI-2, a brand new definition that comes with major extensions, advancements, and clarifications. This quantity offers an entire specification of the MPI-2 commonplace. it really is annotated with reviews that make clear advanced matters, together with why definite layout offerings have been made, how clients are meant to exploit the interface, and the way they need to build their model of MPI. the amount additionally presents many exact, illustrative programming examples.
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Extra resources for MPI: The Complete Reference (Vol. 2), Vol. 2 - The MPI-2 Extensions
In this section we explain notation used throughout the book to help the reader navigate the various parts of the MPI standard. 1 Document Notation As in the standard itself, we set off with specific notation certain classes of remarks that are not part of the description of the MPI standard. Rationale. The rationale for the 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.
The implementation may reserve some signals for its own use. It is required that the implementation document which signals it uses, and it is strongly recommended that it not use SIGALRM, SIGFPE, or SIGIO. Implementations may also prohibit the use of MPI calls from within signal handlers. In multithreaded environments, users can avoid conflicts between signals and the MPI library by catching signals only on threads that do not execute MPI calls. 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.
Html[2011-2-17 2:04:33] next page > page_21 < previous page page_21 next page > Page 21 MPI specifies the behavior of a parallel program assuming that only MPI calls are used. The interaction of an MPI program with other possible means of communication, I/O, and process management is not specified. Unless otherwise stated in the specification of the standard, MPI places no requirements on the result of its interaction with external mechanisms that provide similar or equivalent functionality. This includes, but is not limited to, interactions with external mechanisms for process control, shared and remote memory access, file system access and control, interprocess communication, process signaling, and terminal I/O.