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

Create a gantt chart for scheduling algorithms, Question: (a) The follo...

Question: (a) The following table (table 1.0) gives the length of the CPU burst time in milliseconds of processes P 1 to P 4 . Assume the processes arrived in the order P 1 ,

What is the mfd, What is the MFD? UFD? How are they related? MFD is mas...

What is the MFD? UFD? How are they related? MFD is master-file directory, which points to the UFDs. UFD is user-file directory, which points to each of user's files.

What happens when you execute a program in unix, When you run a program on ...

When you run a program on your UNIX system, the system prepares a special environment for that program. This environment owns everything needed for the system to execute the progra

Explain the proper distribution of functionality and code, Explain the Prop...

Explain the Proper Distribution of Functionality and Code It is important to note that the bandwidth of the server operating system and server processor availability is fixed.

Packets and time division multiplexing (tdm), Broken data into small packet...

Broken data into small packets allow time division multiplexing. In TDM every packet leaves the sender and is switched on the shared interaction channel through a multiplexer. At t

Inter-process Communication !, My code it didn''t run properly ,i tried to ...

My code it didn''t run properly ,i tried to pass 2 parameter example : ./a.out ls -ll ,but it execute only the ls instead of the ls -ll ! plz help amd thank you ! #include #inclu

Activities of operating system-secondary-storage management, Q. What are th...

Q. What are the three main activities of an operating system in regard to secondary-storage management? Answer: 1) Free-space management 2) Storage allocation 3) Disk

Direct memory access, A-  In a table format, compare between Programmed I/O...

A-  In a table format, compare between Programmed I/O, Interrupt -driven I/O, and Direct Memory Access (DMA) in terms of basic idea, Advantages, disadvantages, and the operating en

List disadvantages of using a single directory, List disadvantages of using...

List disadvantages of using a single directory. Users have no privacy. Users must be careful in choosing file names, to avoid names used by others. Users may destroy each othe

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