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

How to attain 180 degree precise phase shift, How to attain 180 degree prec...

How to attain 180 degree precise phase shift? Never tell using inverter: a. DCM an inbuilt resource into most of FPGA can be arranged to get 180 degree phase shift. b. BU

Case x and z difference which is preferable and why, Case x, z difference, ...

Case x, z difference, which is preferable, why? CASEZ : Special version of case statement that uses a Z logic value to signify don't-care bits. CASEX : Special

Explain about butterfly permutation, Q. Explain about Butterfly permutation...

Q. Explain about Butterfly permutation? Butterfly permutation:  This kind of permutation is attained by interchanging the most significant bit in address with least significant

Backward chaining - artificial intelligence, Backward Chaining - Artificial...

Backward Chaining - Artificial intelligence Given that we are just interested in constructing the path, we may set our initial state to be the theorem statement and search backw

Design a model for object oriented development, Design a model for object o...

Design a model for object oriented development The model for object oriented development could be shown as in Figure. It could be classified as dynamic / static and physical /

Explain a multiprocessing operating system, Explain a multiprocessing opera...

Explain a multiprocessing operating system? A multiprocessing system is a computer hardware configuration which contains more than one independent processing unit. Multiprocess

How does the dialog handle user requests, How does the Dialog handle user r...

How does the Dialog handle user requests? when an action is performed ,the system triggers the PROCESS AFTER INPUT event. The data passed contains field screen data data enter

Define stack segment, Q. Define Stack segment ? 8086 Microprocessor su...

Q. Define Stack segment ? 8086 Microprocessor supports Word stack. Stack segment parameters tell the assembler to alert linker that this segment statement states the program s

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

When the get cursor command used in interactive lists, When the get cursor ...

When the get cursor command used in interactive lists? If the hidden information is not enough to uniquely recognize the selected line, the command GET CURSOR is used.  The GET

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