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Memory Management [130]

CPU runs program instructions only when program is in memory
programs do I/O sometimes IMPLY CPU wasted
solution: multiprogramming (multitasking)
multiple programs (processes) share the memory
one program, at at time, gets CPU
simultaneous resource possession (CPU and memory)
better performance (response time, throughput)

Job Scheduling [131]

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long-term : job scheduler (memory management)
which jobs allocated memory and allowed into the system
short-term: CPU scheduler (process management)
which job allocated the CPU

Subsections

Ted Billard 2001-11-17