Timing in mpi program, Computer Engineering

Assignment Help:

Q. Timing in MPI program?

MPI_Wtime ( ) returns lapsed wall clock time in seconds because some random point in past. Elapsed time for program section is given by difference between MPI_Wtime values at starting and end of process. Process clocks aren't necessarily synchronised, so clock values aren't necessarily comparable across the processes and care should be taken in determining overall running time for parallel program. Even if clocks are openly synchronised variation across clocks still can't be expected to be considerably less than round-trip time for zero-length message between the processes.


Related Discussions:- Timing in mpi program

Illustrate clock signals of clock pulse generator, Q. Illustrate Clock sign...

Q. Illustrate Clock signals of clock pulse generator? Synchronization in a sequential circuit is attained by a clock pulse generator that gives continuous clock pulse.  Figure

Effective collaborative computing, Explain how the Web enables effective co...

Explain how the Web enables effective collaborative computing. Discuss the similarities and differences among WebEx, Microsoft NetMeeting and Novell Groupwise software (in less tha

Explain the ccitt hierarchical structure of routing, Explain the CCITT hier...

Explain the CCITT hierarchical structure of routing using block schematic. In right-through routing the originating exchange finds the whole route from source to destination. N

Factor causing parallel overheads, Performance metrics aren't able to attai...

Performance metrics aren't able to attain a linear curve in comparison to increase in number of processors in parallel computer. The main reason for above situation is presence of

Area under curve, Write a program to find the area under the curve y = f(x)...

Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve betw   #includ

What is a recursively enumerable language, What is a recursively enumerable...

What is a recursively enumerable language?            The languages that is accepted by TM is said to be recursively enumerable (r. e) languages.  Enumerable means that the stri

Define com programs, Q. Define COM Programs? A COM (Command) program is...

Q. Define COM Programs? A COM (Command) program is binary image of a machine language program. It is loaded in memory at the lowest available segment address. Program code star

Explain salient points about indirect addressing, Q. Explain salient points...

Q. Explain salient points about indirect addressing? A number of salient points about this scheme are:  In this addressing scheme effective address EA and contents of th

What do you mean by prototype, Q. What do you mean by Prototype? A prot...

Q. What do you mean by Prototype? A prototyping approach lay emphasis on the construction model of a system. Designing and building a scaled-down though functional version of a

Example on multi-statement forall construct, Q. Example on Multi-statement ...

Q. Example on Multi-statement FORALL construct? The subsequent statements set every element of matrix X to sum of its indices.  FORALL (i=1:m, j=1:n)      X(i,j) = i+j an

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd