Single program multiple date in parallel virtual machine, Computer Networking

Single Program Multiple Date

A common style of writing data parallel programs for MIMD computers is SPMD (single program, multiple data): all the processors implement the same program, but each operates on a dissimilar portion of problem data. It is simplest to program than true MIMD, but more flexible than SIMD. Though most parallel computers today are MIMD architecturally, they are generally programmed in SPMD style. In this style, though there is no central controller, the worker nodes carry on doing basically the same thing at essentially the similar time. Instead of central copies of control variables saved on the control processor of a SIMD computer, control variables (iteration counts and so on) are generally stored in a replicated fashion across MIMD nodes. Every node has its own local copy of these global control variables, but each node updates them in an identical way. There are no centrally issued parallel instructions, but communications generally happen in the well-defined collective states. These data replaces occur in a prefixed manner that implicitly or explicitly synchronize the peer nodes. The condition is something like an orchestra without a conductor. There is no central control, but every individual plays from the similar script. The group as a whole stays in lockstep. This loosely synchronous style has few similarities to the Bulk Synchronous Parallel (BSP) model of computing introduced by the theorist Les Valiant in the early 1990s. The restricted pattern of the collective synchronization is simpler to deal with than the difficult synchronisation problems of a general concurrent programming.

A natural assumption was that it should be possible and not too hard to capture the SPMD model for programming MIMD computers in data-parallel languages, along lines same to the successful SIMD languages. Many research prototype languages attempted to do this, with some success. By the 90s the value of portable, standardized programming languages was universally recognized, and there seemed to be a number of consensuses about what a standard language for SPMD programming ought to look like. Then the High Performance Fortran (HPF) standard was introduced.

Posted Date: 3/2/2013 7:32:35 AM | Location : United States







Related Discussions:- Single program multiple date in parallel virtual machine, Assignment Help, Ask Question on Single program multiple date in parallel virtual machine, Get Answer, Expert's Help, Single program multiple date in parallel virtual machine Discussions

Write discussion on Single program multiple date in parallel virtual machine
Your posts are moderated
Related Questions
The purpose of internetworking is universal service across heterogeneous networks. To give this service all computers, and routers have to agree to forward information from a sourc

Application of Satellite Communication started with the installation and commissioning of STD- “B” Earth Station having 11m diameter antenna in 1982, Initially with to only three

Q. Advantages of Fiber Optics? - Higher bandwidth in comparison to twisted-pair and coaxial cable is not limited by medium but by equipment used to generate and receive signals


Question: a) Describe the following two approaches used towards wireless frequency regulation. i. Regulated Band ii. Unlicensed Band b) An antenna is an electrical c

Explain everything you can tell from the following: a. 00-01-00-01-13-FD-F4-C0-00-1E-33-92-CE-99 b. fe80::2c1e:18af:749b:91c5%12 c. 2002:8b64:6e3a::8b64:6e3a d. ::0

NetWare IPX addressing uses a network number and a node number. Which  statements are true? A. The network address is administratively assigned and can be up to 16 hexadecimal digi

what is similarity of wifi and 3g

The performance of interconnection networks is measured on the below parameters.  1) Bandwidth: It determines maximum transfer rate between any two nodes.  It is measured in MB

Customer Premise Equipment (CPE) are devices physically located at the subscriber's premises. Includes both owned and leased equipment.