Tutorial 1 – Computer Systems
Copyright By PowCoder代写加微信 assignmentchef
Hello, World!
I’m Ayesha
A final year BSc. student
I studied and repped this subject
in 2020 and tutored in 2021, head
tutoring this semester!
I Helped Olya organise security
events for high school and
security students
I have industry experience in tech
companies (Google, Atlassian,
etc.) and can help with questions
about CVs, applying for grad
roles/internships, coding
interviews
Feel free to reach out!
https://www.linkedin.com/in/ayeshaahmed-256/
How many of you are NOT
majoring in computer science?
What are you studying?
How many of you just moved
back to Melbourne?
What do you hope to get out of
this subject?
What are you most/least excited
Other questions…?
remarks…
About Computer Systems
1 COMP30023 is A LOT of content
2 Please ask questions in Ed!
3 There will be weekly quizzes that
make up 10% of your grade
4 Commit to your tutorials by11
March, 2022, Friday
How to do well?
Try to watch lectures the week
they come out and solve some
questions in the textbooks
Networking: Computer
Networking by Kurose
Hopefully Olya will upload all chapters
Security: Helpful to just watch
the lectures, google for some
more information
Operating Systems: Modern
Operating Systems by
Regular tutors can’t really do
much about extensions, you will
have to get in touch with me or
Olya with a statement and
supporting documents
Some other
misc. things
We might not finish our tute
questions. If you have questions
outside these sessions, please
ask Ed or message me!
About tutorial activities…
You will have weekly tutorial activities on Canvas that count
toward 10% of your total grade.
You can get the unique access code to these activities at
the end of your specific tute.
They are the same this week for everyone since we are
sorting out tutorial commitments
You must finish the quiz the same day as your tutorial (by
11.59PM AEDT).
If you miss the quiz, you have to fill out a form linked on the
LMS by 8PM AEDT Friday that week.
What is an
A piece of software that
provides an abstraction
of hardware for the
applications running
Resource Manager
Acts as a manager to
resources and allocates
specific tasks when
Can be seen as a
Resource manager and
an extended machine
Extended Machine
Acts as an abstraction layer so
that application does not have
deal directly with underlying
hardware. Slower and easier.
…are just programs in execution by CPU
Each process is associated with its own address space and
resources to execute
Multiple processes can be running concurrently! How??
The state of most processes can be found in the registers
since it provides most immediate memory access
Have 2 modes of
User mode is where regular
applications and some drivers
Kernel is when the program
has complete and direct
access to resources
Common misconception: sudo
A computer program can uses
kernel services by requesting
them through system calls
from the kernel
Context switching involves
switching from user mode to
kernel mode every time a
system call is requested -> a
question of efficiency
Text (program code)
Data (global variables,
constants)
Stack (local variables)
The context of a process is all
the information it needs to
execute at that time (address
space, text, data, stack, and
some more pieces information
that you will cover later
System calls Process adress space
User Mode to Kernel Mode
System calls (src: wikipedia)
Multiprogramming vs
Multiprocessing
Multiprogramming: the ability of a computer to run
multiple programs at once. Doesn’t necessarily mean
running at the same time. It can mean allocating resources
when programs need it and switching between them so
that they seem like they are running at the same time to
Multiprocessing: When computers use multiple processors.
Processes are “truly” parallelly executed.
程序代写 CS代考加微信: assignmentchef QQ: 1823890830 Email: [email protected]
Reviews
There are no reviews yet.