User Control

• User Control : User has broader control on process characteristics specs in an RTOS
  • Priority
  • Deadlines: Hard or soft.
• Memory Management: paging or swapping
• Name the processes to be resident in memory
• Scheduling policies

Reliability

• Reliability: A processor failure in a non-RT may result in reduced level of service. But in an RT it may be catastrophic : life and death, financial loss, equipment damage.
• Fail-soft Operation: Ability of the system to fail in such a way preserve as much capability and data as possible.
• In the event of a failure, immediate detection and correction is important.
• Notify user processes to rollback.
• Apply compensation.
• Check-pointing and rollback states.