Speed up factor, Computer Engineering

Remember, the value of α is between 0 and 1. Now, let us put some values of α and compute the speed up factor for increasing values of number of processors.  We get that the S(N) keeps on decreasing with increase in the value of α (i.e. number of sequential operations as shown in Figure).

1703_Speed up factor.png

No. of processors required

Figure:- Speed-up vs. Number of Processors

The graph in Figure clearly shows that there is a bottleneck caused due to sequential operations in a parallel computer. Even when the amount of sequential operations is more, after increasing the number of processors, the speed up factor S (N) degrades.

The sequential fraction i.e. α can be compared with speed up factor S(N) for a fixed value of N say 500. Figure shows a pictorial view of effect of Amdahl's law on the speed up factor.

299_Speed up factor1.png

  α (Sequential Operations)

Posted Date: 3/5/2013 4:46:47 AM | Location : United States







Related Discussions:- Speed up factor, Assignment Help, Ask Question on Speed up factor, Get Answer, Expert's Help, Speed up factor Discussions

Write discussion on Speed up factor
Your posts are moderated
Related Questions
I want to know...if there is a program available in C code using data structure for online movie booking system

Define emulation. Given a computer with a particular instruction set, it is possible to explain additional machine instructions and execute them with extra micro routines. Emul

Packet switching is used for (A)  Credit card verification (B)  Automated Teller Machine (C)  The internet and the World Wide Web (D)  All of the above  Ans

This is an embedded system that involves the integration of hardware and software design stages. It consists of the user interface (keypads and LCD display) and two Peripheral Inte

Define static memories? Memories that consists of circuits capable of retaining their state as long as power is applied is known as static memories

Explain The do while loops The do while loops is similar, but the test occurs after the loop body is executed. This ensures that the loop body is run at least once.

Q. Explain Frequency-division multiplexing? Frequency-division multiplexing (FDM) is a technique for data transmission widely used in telephone, radio, and cable TV systems in

Explain the use of SSL to secure the network.  SSL (Secure Sockets Layer) is a protocol developed by Netscape for transferring private documents by the Internet. SSL works by u

The Chocolate Delights Candy Company requires to add the following functionality to its cash register: When a customer is checking out, the cash register requires keeping the ne

Question: a) Describe what is meant by a "bus". There are two types of bus, dedicated and multiplexed. Give a brief description of both types of buses. b) Briefly explain f