Assignment on Fork System Call, Operating System

Assignment Help:
Parent process P creates three child processes, C1, C2, and C3. Each child process executes a
memory and CPU intensive application of your choice. Your choice should be such that the children
execute for considerable periods of time and acquire considerable amount of memory (say, on the stack
or on the heap).
The parent process P wants to periodically monitor the status of its children to determine: • are each of the three children, C1, C2, and C3 alive? • what is the CPU utilization of each child process? • what is the memory usage of each child process?
Note that P received the PIDs of C1, C2, C3, during the fork() system call. In order to obtain the
periodic status, P does the following:
(a) It periodically forks a child, M, creates a pipe with it, and redirects the standard output of M to
the pipe (that is, when M writes to stdout it can be read by P from the pipe). The monitoring
interval can be implemented with the sleep command.
(b) Once M is created, it chooses a suitable system call from the exec family to execute the “ps”
command with suitable arguments (thereby writing its output into the pipe with its parent P).
Thereafter M terminates.
(c) P reads the output of M from the pipe, finds the entries corresponding to C1, C2, and C3 (that
is, if they are alive) and extracts their respective CPU and memory utilizations (in percentage,
as reported by “ps”). P writes the timestamp and the information extracted in the terminal.
(d) When P finds that C1, C2, and C3 are not present in the listing of “ps”, it writes “All children
have terminated” and stops.
Please study the syntax and arguments of “ps” carefully so that you execute it with the optimal set of
arguments.
You need to submit the following:
1. The C program for P
2. The applications run by C1, C2, C3. These must be made available in a form that the TA can
run your system in your absence

Related Discussions:- Assignment on Fork System Call

What are the various scheduling criteria for cpu scheduling, What are the v...

What are the various scheduling criteria for CPU scheduling? The various scheduling criteria are CPU utilization

Why is rotational optimization no longer consequently useful, UNIX systems ...

UNIX systems utilized to use disk-layout optimizations based on the rotation position of disk data however modern implementations including Linux simply optimize for sequential dat

Explain direct communication and indirect communication, Direct communicati...

Direct communication With direct communication each process that requires to communicate must explicitly name the recipient or sender of the communication. The send and receive

Hi, is the operating system windows sometimes interupts

is the operating system windows sometimes interupts

Define rotational latency and disk bandwidth, Define rotational latency and...

Define rotational latency and disk bandwidth. Rotational latency is the additional time waiting for the disk to rotate the wanted sector to the disk head. The disk bandwidth is

Difference between preemptive and nonpreemptive scheduling, Define the diff...

Define the difference between preemptive and nonpreemptive scheduling. State why strict nonpreemptive scheduling is unlikely to be used in a computer center. Preemptive schedul

Explain fixed partitioning, Explain fixed partitioning. Partitioning ar...

Explain fixed partitioning. Partitioning are the simpler techniques that don't involve virtual memory. Partitioning has been used in numerous variations in operating systems.

How many disk operations are needed to fetch the i-node, How many disk oper...

How many disk operations are needed to fetch the i-node for the file /usr/ast/courses/os/handout.t? Assume that the i-node for the root directory is in memory, but nothing else alo

Define an assembly language, Define an assembly language  Assembly lan...

Define an assembly language  Assembly language stands for a Low level programming language

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