Does First Come First Serve (FCFS) suffer from Starvation?
Does First Come First Serve (FCFS)suffer from Starvation?An esteemed computer science examination in India included this question.The complete question goes as follows-Which one or more of the...
View ArticleIssue with same priority input in Non-Pre-Emptive Priority Scheduling in python
My code is running successfully when the input priorities are unique but when we enter same priority then the output gets messed up.As I am implementing using lists and checked and compared using the...
View Articleoperating system - where is long term scheduler used?
I understand that long term scheduling decides the degree of multi-programming, but I am unable to understand where it can be used. Because let say I want to run some process and double click that...
View ArticleWhat is the difference between interrupt latency and interrupt response?
Everywhere I searched on Google has not provided me the answer I was looking for. In fact, most of them say they are used interchangeably. My assignment has posed this question and I would really like...
View ArticleCan we steal more CPU time/Resource by having more(than other running apps on...
We know, the CPU Schedules thread. So if my app has much more thread than other apps, then will my app get more CPU time? I think OS can somehow prevent this since it knows which process these threads...
View ArticleProgram is not calculating the right turaround time and waiting time in...
I'm working on a C program that's supposed to generate a random list of processes and run them through a round-robin scheduling algorithm. However, the program doesn't seem to be working as expected...
View ArticlePriority CPU Scheduling Algorithm [closed]
I am a university student working on a Operating System Project and currently trying to implement a Priority CPU Scheduling Algorithm in Java but I am getting the wrong output.I don't know why I am...
View ArticleNiceness and priority processes on Linux system
I am looking for a way to modify a process' priority through command line.I found the builtin (bash) nice and the command renice which allow to modify the niceness of the process, but not the actual...
View ArticleStoring and retrieving process control block
When a process is in execution, the contents of the PCB (which is in kernel memory space?) are loaded onto the CPU registers, and status registers, kernel stack pointers, user stack pointers, etc. When...
View ArticleWhat scheduling algorithms does Linux kernel use?
What scheduling algorithms does Linux kernel use?Where can I get more info about linux's kernel? (OS first course... student level)
View ArticleWhy one non-voluntary context switch per second?
The OS is RHEL 6 (2.6.32). I have isolated a core and am running a compute intensive thread on it. /proc/{thread-id}/status shows one non-voluntary context switch every second.The thread in question is...
View ArticleThe relationship between interrupts and process scheduling
I am a beginner in operating systems and I have just learned about process switching. I have just finished reading about the concept of "interrupts". The book explains that interrupts are divided into...
View ArticleProcess Loading into Main Memory(RAM)
My query is: A process comes to ready queue( Is the ready queue a data structure in RAM?) and then the loader creates space for the process in main memory after which it is loaded in that allocated...
View ArticleScheduling and running boot time code from Windows
I've been doing a good bit of exploring BIOs/UEFI code recently, taking an interest in bootable applications mostly for educational/hobby purposes. One thing I found really interesting is the certain...
View ArticleMultithreaded Shortest Job First Scheduling Algorithm
I'm familiar with Shortest Process next Scheduling Algorithm (SJF) which is a non preemptive algorithm. But, this algorithm handles only one process at a time which has the smallest burst time. Can it...
View ArticleDifference between sysproc.c and proc.c
I’m doing a project for class that includes implementing a lottery scheduler in xv6. I have to implement two system calls settickets() and getpinfo(). I added the system calls to syscall.c, syscall.h,...
View ArticleFCFS scheduler implemention for xv6
I am trying to implement FCFS scheduling algorithms for xv6. The following is the modification i did to the code:voidscheduler(void){ struct proc *p = 0; struct cpu *c = mycpu(); c->proc = 0;...
View ArticleDoes any JVM implement blocking with spin-waiting?
In Java Concurrency in Practice, the authors write:When locking is contended, the losing thread(s) must block. The JVM can implement blocking either via spin-waiting (repeatedly trying to acquire the...
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if 2 processes have same exection time in presumptive STF,how do we decide...
Image of table:Textual representationprocessarrival timeexecution timea03b22c22d55e81From the table if 2 processes have same exection time in presumptive STF,how do we decide which to pick.and solution
View ArticleCan anyone tell me step by step procedure to solve this problem of CPU...
Consider the set of 4 processes whose arrival time and burst time are given below- Here is the image If the CPU scheduling policy is Shortest Remaining Time First, calculate the average waiting time...
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