Software Concepts : Uniprocessor Operating Systems

OS for distributed systems & uniprocessors are very much alike as they act as resource managers for the underlying hardware. Dual mode of operation is ther in uniprocessor OS and dual-mode led to monolithic OSs (all the OS runs in kernel mode).

Uniprocessor OS consist of microkernels which have their advantages and disadvantages, like
• Advantage : flexible and user-level modules can be distributed.
• Disadvantage : challenge status-quo, IPC costs.