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

Explain implementation of circuits from boolean expression, Explain Impleme...

Explain Implementation of the Circuits From the Boolean Expression? If the operation of the circuit is defined by a Boolean expression, a logic-circuit diagram can he implement

Explain cell spacing and cell padding, Q. Explain Cell Spacing and Cell Pad...

Q. Explain Cell Spacing and Cell Padding? Couple of attributes known as CELLSPACING and CELLPADDING. Both are part of tag. CELLPADDING is the amount of space between

Difference between static call and dynamic call, In the case of Static call...

In the case of Static call, the called program is a stand-alone program, it is an executable program. During run time we can call it in our called program. As about Dynamic call, t

State about the multiple inheritance, State about the multiple inheritance ...

State about the multiple inheritance multiple inheritance is shown in Figure. In this, one class is inherited from more than one class.

Explain the typical functions of operating systems, List the typical functi...

List the typical functions of operating systems. Classical functions of operating system are given as: (1) Process management: A process is a program throughout execution.

Convert the following into sop form, Q. Convert the following into SOP form...

Q. Convert the following into SOP form   1. (A+B) (B'+C) (A'+ C) 2. (A+C) (AB'+AC) (A'C'+B) 3. (A'+B') (C'+B)   Q.Convert the following into POS form   1. WYZ + XYZ + W'X'

Inverse of exclusive or known as xnor gate, Truth table of NAND and NOR can...

Truth table of NAND and NOR can be made from NOT (A AND B) and NOT (A OR B) correspondingly. Exclusive OR (XOR) is a special gate whose output is one only if two inputs aren't equa

Explain about the e-commerce over extranets, Explain about the e-commerce o...

Explain about the e-commerce over extranets. Extranets are regarding “joining up” the supply chain-suppliers, distributors, resellers and customers are enabling business-to bus

Designing the instruction format, Q. Designing the instruction format is a ...

Q. Designing the instruction format is a complex art? Instruction Length Significance: It's the fundamental issue of the format design. It concludes the richness and flex

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