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

Define clock rate, Define clock rate? The clock rate is given by, R=1/P...

Define clock rate? The clock rate is given by, R=1/P, where P is the length of single clock cycle.

What are latches and flipflops, What are latches and flipflops? There a...

What are latches and flipflops? There are two types of circuits as follows: a. Combinational b. Sequential Flipflops and latches both come into the category of "sequen

Operation codes used in assembly instructions, Q. Operation codes used in a...

Q. Operation codes used in assembly instructions? Now let's describe various operation codes needed for this machine so that we can translate High level language instructions t

On what machines matlab should be run?, Matlab will run from sthelens, and ...

Matlab will run from sthelens, and only if sthelens is down, from cher, orsay or tiree. It runs on other machines too, but some of the other machines have older versions of the OS

Explain congestion, Explain CONGESTION. CONGESTION: This is uneconomi...

Explain CONGESTION. CONGESTION: This is uneconomic to provide sufficient equipment to carry entire traffic that could possibly be given to a telecommunication system. Inside

Typicality of virtual addresses, The typicality of virtual addresses is tha...

The typicality of virtual addresses is that: They are longer than physical addresses because total addressed memory in virtual memory is more than actual physical memory.

Find out the access time of ROM using bipolar transistors, The access time ...

The access time of ROM using bipolar transistors is about ? Ans. About 1 µ sec is the access time of ROM using bipolar transistors.

Explain synchronous dram, What is synchronous DRAM? Synchronous DRAM's ...

What is synchronous DRAM? Synchronous DRAM's are those whose operation is directly synchronized with a clock signal.

Should validation occur server-side or client-side, Should validation (did ...

Should validation (did the user enter a real date) occur server-side or client-side? Why? Validation will be done in both sides i.e., at the server side and client side. Ser

Earned value analysis, Senior management has requested a status update on t...

Senior management has requested a status update on the workstation installation project.  As a part of this update, managers have requested that you present an Earned Value analysi

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