LAM/MPI

LAM/MPI is one of the predecessors of the Open MPI project. Open MPI represents a community-driven, next generation implementation of a Message Passing Interface (MPI) fundamentally designed upon a component architecture to make an extremely powerful platform for high-performance computing. LAM/MPI was officially retired in March 2015.

LAM (Local Area Multicomputer) is an MPI programming environment and development system for heterogeneous computers on a network. With LAM/MPI, a dedicated computer cluster or an existing network computing infrastructure can act as a single parallel computing resource. LAM/MPI is considered to be "cluster friendly", in that it offers daemon-based process startup/control as well as fast client-to-client message passing protocols. LAM/MPI can use TCP/IP, shared memory, Myrinet (GM), or Infiniband (mVAPI) for message passing.

LAM features a full implementation of MPI-1 and much of MPI-2. Compliant applications are source code portable between LAM/MPI and any other implementation of MPI. In addition to providing a high-quality implementation of the MPI standard, LAM/MPI offers extensive monitoring capabilities to support debugging. Monitoring happens on two levels. First, LAM/MPI has the hooks to allow a snapshot of process and message status to be taken at any time during an application run. This snapshot includes all aspects of synchronization plus datatype maps/signatures, communicator group membership, and message contents (see the XMPI application on the main LAM web site). On the second level, the MPI library is instrumented to produce a cumulative record of communication, which can be visualized either at runtime or post-mortem.

MPI

MPI or Mpi may refer to:

Ethnic group

Science, information technology and engineering

Message Passing Interface

Message Passing Interface (MPI) is a standardized and portable message-passing system designed by a group of researchers from academia and industry to function on a wide variety of parallel computers. The standard defines the syntax and semantics of a core of library routines useful to a wide range of users writing portable message-passing programs in different computer programming languages such as Fortran, C, C++ and Java. There are several well-tested and efficient implementations of MPI, including some that are free or in the public domain. These fostered the development of a parallel software industry, and encouraged development of portable and scalable large-scale parallel applications.

History

The message passing interface effort began in the summer of 1991 when a small group of researchers started discussions at a mountain retreat in Austria. Out of that discussion came a Workshop on Standards for Message Passing in a Distributed Memory Environment held on April 29–30, 1992 in Williamsburg, Virginia. At this workshop the basic features essential to a standard message-passing interface were discussed, and a working group established to continue the standardization process. Jack Dongarra, Tony Hey, and David W. Walker put forward a preliminary draft proposal in November 1992, this was known as MPI1. In November 1992, a meeting of the MPI working group was held in Minneapolis, at which it was decided to place the standardization process on a more formal footing. The MPI working group met every 6 weeks throughout the first 9 months of 1993. The draft MPI standard was presented at the Supercomputing '93 conference in November 1993. After a period of public comments, which resulted in some changes in MPI, version 1.0 of MPI was released in June 1994. These meetings and the email discussion together constituted the MPI Forum, membership of which has been open to all members of the high performance computing community.

Steyr MPi 69

The Steyr MPi 69 is a 9×19mm submachine gun of the late 20th century made by the Austrian firm Steyr.

Characteristics

The MPi 69 is shaped much like other telescoping bolt submachineguns, such as the MAC 10 or Uzi. It has a vertical pistol handgrip into which the magazine is inserted, and a longer horizontal front grip area ; it also has a folding stock.

Featuring a design unusual among modern submachine guns, the MPi 69 is cocked by a dual-purpose lever also used as the front sling attachment point. The forward handgrip and vertical pistol handgrip are all one large plastic molding, forming the front and center bottom part of the weapon. The receiver proper is a square metal tube which partly nestles inside the plastic handgrip.

Production Status

In 1990, the MPi 81 was replaced by the TMP in the product line, though the TMP was also discontinued by Steyr, who sold the design to Brügger & Thomet and improved as the Brügger & Thomet MP9.

Variants

MPi 81

Lam

Lam and its various forms may refer to:

Lām

LAM

Lamé

Lamé may refer to:

See also

Lamá

Lamá may refer to: