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SYNCRONIZATION AND COMMUNICATION FIG (A) SYCHRONIZATION FIG(B) INTERTASK COMMUNICATION
MEMORY MANAGEMENT Non-real-time operating systems offer memory allocation services from what is termed a Heap STACK - Stack management is used during context switching for TCBs RTOS does it by a mechanism known as Pools
OTHER KERNEL FUNCTIONS Timer Management Interrupt and event handling Device I/O Management
FEATURES OF RTOS MULTITHREADING AND PREEMPT ABILITY THREAD PRIORITY INTERTASK COMMUNICATION AND SYNC PRIORITY INHERITANCE SHORT LATENCIES
WIDELY USED RTOSThese are the best known, most widelydeployed real-time operating systems. QNX RTLinux VxWorks Windows CE