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vekshin1
3 years ago
10

Suppose you have a program P and 90 percent of P can be parallelized, but 10 percent of P is inherently sequential and cannot be

parallelized. Further suppose that the part of P that can be parallelized can run with equal load balancing (same load per processing element) on a parallel system with N processing elements. Express the performance of P as a simple equation in the independent variable N.
Computers and Technology
1 answer:
EleoNora [17]3 years ago
5 0

Answer:

Means no matter how many processors you use, speed up never increase from 10 times.

Explanation:

If a problem of size W has a serial component Ws,then performance using parallelism:

Using Amdahl's Law:

Tp = (W - Ws )/ N + Ws

Here, Ws = .1,

W - Ws = .9

Performance Tp = (.9 / N) + .1

---------------------------------------------------------

Speed Up = 1 / ( (.9 / N) + .1)

If N -> infinity, Speed Up <= 10

Means no matter how many processors you use, speed up never increase from 10 times.

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Write the definition of a function named newbie that receives no parameters and returns true the first time it is invoked (when
kondaur [170]

Answer:

The function definition to this question can be described as follows:

bool newbie() //defining a bool method newbie

{

static bool y = true ; // defining a static bool variable y and assign value true

bool t1=y; //defining bool variable t1 and assign value of variable y

y=false; // assigning value in variable y

return t1; // return value of variable t1

}

Explanation:

The program to this question can be described as follows:

Program:

#include <iostream> //defining header file

using namespace std;

bool newbie() //defining a bool method newbie

{

static bool y = true ; // defining a static bool variable y and assign value true

bool t1=y; //defining bool variable t1 and assign value of variable y

y=false; // assigning value in variable y

return t1; // return value of variable t1

}

int main() //defining main method

{

int s,s1; //defining integer variable s,and s1

s=newbie(); // variable s that call method

cout<<s<<endl; //print value

s1=newbie();//variable s that call method

cout<<s1;  //print value

return 0;

}

Output:

1

0

Description:

The description of the above function can be described as follows:

  • In the above method definition a boolean method "newbie" is declared, which can't accept any parameters, inside the method, two boolean variable "y and t1" is declared.
  • In this variable, variable y is a static boolean variable, that assigns a true value, and in t1 variable, we hold static variable value.  
  • In the next step, the "y" variable assigns a value, that is false and returns variable t1 value.
  • In the next step, the main method is declared, inside these two integer variable s, s1 is declared, that calls a method, and prints it value in the first time, it will print 1, that means the false and second time it will print 0, that means false.
7 0
3 years ago
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