Bookmarks
Concepts
Activity
Courses
Learning Plans
Courses
Request
Log In
Sign up
👤
Log In
Join
?
⚙️
→
👤
Log In
Join
?
←
Menu
Bookmarks
Concepts
Activity
Courses
Learning Plans
Courses
Request
Log In
Sign up
×
CUSTOMIZE YOUR LEARNING
→
TIME COMMITMENT
YOUR LEVEL
LET'S Start Learning
👤
Log In
Join
?
⚙️
→
👤
Log In
Join
?
←
Menu
Bookmarks
Concepts
Activity
Courses
Learning Plans
Courses
Request
Log In
Sign up
×
CUSTOMIZE YOUR LEARNING
→
TIME COMMITMENT
YOUR LEVEL
LET'S Start Learning
New Course
Concept
Page Table Entries
Page table entries
(PTEs) are crucial components of the
memory management unit
in an
operating system
, linking
virtual memory addresses
to
physical memory addresses
. They store vital information such as the
frame number
, access permissions, and
status bits
, which help ensure efficient and
secure access to memory
in a
virtualized environment
.
Relevant Degrees
Software Engineering and Development 78%
Computer Architecture and Design 22%
Generate Assignment Link
Lessons
Concepts
Suggested Topics
Foundational Courses
Learning Plan
All
Followed
Recommended
Assigned
Concept
Virtual Memory
Virtual memory
is a
memory management technique
that provides an '
idealized abstraction
' of the
storage resources
available to a process, creating the illusion of a large,
continuous memory space
. It allows systems to use hardware and software to compensate for
physical memory shortages
, enabling
efficient multitasking
and
isolation between processes
.
Concept
Memory Management Unit
A
Memory Management Unit
(MMU) is a critical
hardware component
in computers that handles all
memory and caching operations
, translating
virtual addresses
to
physical addresses
and managing
memory protection
. It plays a crucial role in
optimizing performance
and ensuring
system stability
by efficiently allocating and de
Allocating memory resources
.
Concept
Frame Number
A
frame number
is an identifier assigned to
sequentially ordered data units
, such as
video frames
or
network packets
, which helps maintain their
correct sequence
and detect any
loss during transmission
. It's crucial in applications like
video streaming
and
packet-switched networks
where preserving the
order of data
for
accurate processing
and playback is essential.
Concept
Access Permissions
Access permissions
are
security settings
that determine which users or systems can view, modify, or
execute resources
within a
computing environment
. They are crucial for maintaining
data integrity
, confidentiality, and ensuring that only
authorized users
have the
necessary access
to perform
specific tasks
.
Concept
Status Bits
Status bits
are
essential flags
used by processors and microcontrollers to indicate the
outcome of operations
, helping
control flow
and
error detection
in programs. By
monitoring these bits
, systems can make
decisions based on conditions
like overflow, zero results, or
carry operations
, ensuring
reliable computation
and
logic flow
.
Concept
Paging
Paging is a
memory management scheme
that eliminates the need for
contiguous allocation of physical memory
, thus
reducing fragmentation
and allowing for
efficient use of RAM
. It divides the process's
virtual address space
into
fixed-size blocks
called pages, which are mapped to
physical memory frames
, enabling processes to be easily swapped in and out of the main memory.
Concept
Translation Lookaside Buffer
The
Translation Lookaside Buffer
(TLB) is a
specialized cache
used in
computer processors
to reduce the time taken to access
memory locations
by storing
recent translations
of
virtual memory
to
physical memory addresses
. It plays a critical role in
optimizing memory access speed
and
overall system performance
by minimizing the need for frequent
page table lookups
.
Concept
Address Space
Address space
refers to the range of
discrete addresses
that a
computer system
can use to access memory or
storage locations
, crucial for managing how data and processes are allocated and accessed in both physical and
virtual memory systems
. It is a fundamental concept in
computer architecture
and
operating systems
, impacting
system performance
, memory management, and security.
Concept
Page Tables
Page tables
are a crucial component of a
computer's memory management unit
, responsible for translating
virtual addresses
to
physical addresses
in a system with
virtual memory
. They enable efficient and secure
memory allocation
by maintaining
mappings for each process
, allowing
multiple processes
to coexist without interfering with each other's memory space.
3