what are the important resources to manage? (8)
- primary memory (RAM)
- secondary storage (HDD/SSD/optical drive)
- processor speed
- bandwidth
- screen resolution
- sound processor
- cache
- network connectivity
primary memory: what is effect on system if too limited?
- place where all data/programs currently being processed are kept
effect:
- will use secondary storage thru virtual memory (much slower)
- if virtual memory cant be created, data cant be loaded/saved
secondary storage: what is effect on system if too limited?
- place where data/program can be stored if power is lost
effect:
- data may be lost
- can prevent OS from using virtual memory if RAM fills up
processor (speed): what is effect on system if too limited?
- does all calculations in a computer system
- speed = # calcs that can be done per second
effect:
- processor wil take longer to perform tasks
processor (cores): what is effect on system if too limited?
- each processor has at least 1 ALU or core
- 2 ALUs = can do 2 operations
effect:
- only 1 core - can only perform 1 set of operations at a time
- affects how many tasks a system can cope simultaneously
bandwidth: what is effect on system if too limited?
- measurement of how much data can be sent at same time over a certain time frame (aka. bit rate)
effect:
- data takes longer to move b/w 2 points
- affects how long it takes before data can be processed entirely
screen resolution: what is effect on system if too limited?
- measurement of # pixels in height x width of display
effect:
- display is pixelated
- smaller file size but poorer quality
sound processor: what is effect on system if too limited?
- sound reproduction on a seperate processor, frees up CPU
effect:
- CPU taxed w/ processing sounds (slows down)
- lower quality
graphics processor: what is effect on system if too limited?
- complex graphic processing (like 3D rendering)
effect:
- will take longer or be limited
cache: what is effect on system if too limited?
- contains instructions/data CPU is likely to request from RAM
effect:
- CPU must wait for data from RAM -> slows down system
netowrk connectivity: what is effect on system if too limited?
- each network card connects to a particular type of network media (cable/wireless signal)
effect:
- limited types limits the way data can be sent or recieved
- speed can also be a factor
multi-access vs multi-programming
multi-access/multi-user:
- either many users on same machine or many users connected to same network
multi-programming
- system that can have diff programs (apps) installed
functions of operating systems
- device configuration
- controls peripherals - file management
- memory management
- allocation of RAM
- strucutre for secondary storage - interface platform
- allows computer to run other applications
- translates user input/output and sends to correct memory address
what is interrupt handling
- function whose execution is triggered by reception of an interrupt
- interrupts used to handle high-priority conditions that stop current code
