Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. Speed Up - metrics for performance evaluation?
Speed up is ratio of time needed to execute a given program employing a specific algorithm on a machine with single processor (It implies that T (1) (where n=1)) to time needed to execute same program using a particular algorithm on a machine with multiple processors (It implies that T (n)). Fundamentally speed up factor helps us in knowing relative gain achieved in shifting from a sequential machine to a parallel computer. It can be noted the term T(1) denotes amount of time taken to execute a program employing the best sequential algorithm It implies that the algorithm with least time complexity.
Let's take an illustration and explain practical use of speedup. Suppose we have a problem of multiplying n numbers. Time complexity of sequential algorithm for a machine with single processor is O(n) because we require one loop for reading and computing output. But in the parallel computer let every number is assigned to specific processor and computation model being used being a hypercube. In such a condition the total number of steps essential to compute result is log n it implies that time complexity is O(log n). Figure below explains the steps to be followed for achieving the required output in a parallel hypercube computer model.
As number of steps followed is equivalent to 3 it implies that log 8 where n is number of processors. Therefore complexity is O(log n).
In view of fact sequential algorithm takes 8 steps whereas above mentioned parallel algorithm takes 3 steps speed up is as under:
Because value of S(n) is inversely proportional to time needed to calculate output on a parallel number that in turn is dependent on number of processors used for performing the computation. The relation amid S(n) versus Number of processors is displayed in Figure. The speedup is directly proportional to number of processors so a linear arc is portrayed. But in situations where there is parallel overhead the arc is sub-linear.
Figure: Steps followed for multiplying n numbers stored on n processors
Figure: Speed-up vs. Number of Processors
Computer data storage: Computer data storage, frequently called memory or storage refers to computer recording media and components, devices that received digital data used fo
how many pins does a floppy drive connector have
Algorithmic Complexity theory: Moreover a similar situation occurs in broad to specific ILP systems when the inference rules are deductive thus they specialize. So at some sta
What does the term convergence mean with respect to E-commerce? Convergence with respect to e-commerce The ability to leverage and integrate the several data sources and
In a clinic 0.15 of the patients have got the HIV virus. Assume a blood test is carried out on a patient. If the patient has got the virus the test will turn out positive with prob
How society is affected thorugh Internet Buying goods and services (for example banking) over the internet has both negative and positive aspects on society. These can be expl
Define class NP. Problems that can be solved in polynomial time by a nondeterministic TM. Contains all problems in P and some problems possibly outside P.
What is Fork Clk gets its value after 1 time unit, reset after 10 time units, enable after 5 time units, data after 3 time units. All the statements are executed in parallel.
A dialog box such as a File menu that have one command until it is clicked when a number of dissimilar commands "drop-down."
Define Hypertext verses Hypermedia briefly. Hypertext is fundamentally the same as regular text- this can be stored, read, searched or edited along with a significant exception
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!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: info@expertsmind.com
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd