All Questions
Tagged with process-scheduling computer-architecture
8 questions
4
votes
1
answer
108
views
How does caching, paging, virtual memory, and OS all tie together for UNIX copy-on-write?
In my OS course, the instructor mentioned the following: In UNIX if a parent process creates a new child ("fork") then the child is an exact duplicate of the parent. This means its memory ...
- 143
3
votes
1
answer
2k
views
What are the differences between Earliest Deadline First (EDF) and Earliest Due Date (EDD)?
From my understanding, the EDF (Earliest Deadline First) rule is essentially an iterative "version" of the EDD (Earliest Due Date) rule, which allows for preemption. At every point in time, ...
- 463
2
votes
0
answers
54
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Finding the timestamps of processes implementing Lamport's clocks
I have been asked this question, but don't know how to go about answering it.
Three process, which are implementing Lamport's clocks, are running and a lot of events are taking, place including some ...
2
votes
0
answers
7k
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Difference between Response time, Execution time, and CPU time
I studied Computer Architecture from David A. Patterson and have came across the idea of Response time.
Response time also called Execution time. The total time required for the computer to ...
- 123
2
votes
2
answers
1k
views
Characterize an OS as multiprogrammed OS
Which of the following features will characterize an OS as multiprogrammed OS?
More than one program may be loaded into main memory at the same
time.
If a program waits for certain event another ...
1
vote
1
answer
691
views
Can the processor just turn off the interrupt request line?
I was doing some of the interrupts question online and found this Multiple choice question
How can the processor ignore other interrupts when it is servicing one
a) By turning off the interrupt ...
- 133
5
votes
1
answer
3k
views
How are system calls handled in a virtual machine?
Quoting wikipedia, a system call is:
In computing, a system call is how a program requests a service from
an operating system's kernel. This may include hardware related
services (e.g. ...
- 427
9
votes
4
answers
15k
views
What is meant by interrupts in the context of operating systems?
I've decided to read Operating Systems Concepts by Silberschatz, Galvin Gagne (8th edition) over the summer. I've gotten to a topic that's confusing me - interrupts and their role as it relates to ...
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