I/O Multiplexing: The idea of I/O multiplexing is to use “select” function to ask kernel to suspend process. It returns control to application only after one or more I/O events had occurred. It denotes waiting for a set of descriptors that is ready for reading. The “select” function would manipulate sets of type “fd_set”, that denotes descriptor sets. It takes two inputs: a descriptor set called “read set” and cardinality of read set. It blocks until at least one descriptor in read set is ready for reading. A descriptor “k” is ready for reading if and only if a request to read 1 byte from that descriptor would not block. The “fd_set” is been modified that points to argument “fdset” to indicate subset of read set called “ready set”. The value returned by function indicates cardinality of ready set.

Question

Want to see the full answer?

Answer 1

Question

Chapter 12, Problem 12.33HW

Program Plan Intro

I/O Multiplexing:

The idea of I/O multiplexing is to use “select” function to ask kernel to suspend process.

It returns control to application only after one or more I/O events had occurred.

It denotes waiting for a set of descriptors that is ready for reading.

The “select” function would manipulate sets of type “fd_set”, that denotes descriptor sets.

It takes two inputs: a descriptor set called “read set” and cardinality of read set.

It blocks until at least one descriptor in read set is ready for reading.

A descriptor “k” is ready for reading if and only if a request to read 1 byte from that descriptor would not block.

The “fd_set” is been modified that points to argument “fdset” to indicate subset of read set called “ready set”.

The value returned by function indicates cardinality of ready set.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Instructions for Part 2 In part 2 (and probably in every part) I'm going to use "matrix" and "two-dimensional array" interchangeably. In part 2 we will read in the data from file, prepare ThreadOperation for part 3 by adding inputs, and add another helper method to verify we can access the submatrices accurately. 1. Modify ThreadOperation to take as input (through the constructor) two matrices and a quadrant indicator. The indicator could be a String, an int, an enum or a set of indexes. It's up to you. 2. Modify the main method to instantiate the four ThreadOperation objects with placeholder values to confirm that the code still runs without error. The placeholders are just example matrices and a quadrant indicator. 3. Write a static method named printSubmatrix that takes four integer indexes and a matrix and prints out the submatrix indicated by the indexes. 4. Create a matrix and use it to test printSubmatrix in main. Your print2dArray method from part 1 should come in handy for…

Write a test client TestBinarySearch.java for use in testing the implementations of min(), max(), floor(), ceiling(), select(), rank(),deleteMin(), deleteMax(), and keys() that are given in the text. Start with the standard indexing client given on page 370. Add code to take additional command-line arguments, as appropriate.Write a test client TestBinarySearch.java for use in testing the implementations of min(), max(), floor(), ceiling(), select(), rank(),deleteMin(), deleteMax(), and keys() that are given in the text. Start with the standard indexing client given on page 370. Add code to take additional command-line arguments, as appropriate.Write a test client TestBinarySearch.java for use in testing the implementations of min(), max(), floor(), ceiling(), select(), rank(),deleteMin(), deleteMax(), and keys() that are given in the text. Start with the standard indexing client given on page 370. Add code to take additional command-line arguments, as appropriate.Write a test client…

Write a C program to implement threading.a. Use following two Arraysa. Student ID[]={101,102,103,104,105}b. Student Results[]={85,45,55,65,75}b. Thread1 prints the student IDs of those students who has 1st and 2nd highest marks.c. Thread 2 prints the IDs of failed studentsd. Thread3 prints avg marks of the class