PPID (1 word) - process descriptor of the parent process.In the present version of eXpOS, the pid is set to the index of the entry in the process table. PID (1 word) - process descriptor, a number that is unique to each process.TICK is reset to 0 when a process is swapped out or in. It has an initial value of 0 and is updated whenever the scheduler is called. TICK (1 word)- keeps track of how long the process was in memory/ swapped state.Any entry of PT has the following fields: Offset In this version of eXpOS, PT_ENTRY_SIZE is set to 16 words. In the current version of eXpOS, MAX_PROC_NUM = 16.Įach entry in the Process Table has a constant size, defined by the PT_ENTRY_SIZE. The maximum number of entries in PT (which is maximum number of processes allowed to exist at a single point of time in eXpOS) is MAX_PROC_NUM. Each entry contains several fields that stores all the information pertaining to a single process. The entry is created when the process is created by a Fork system call. The Process Table (PT) contains an entry for each process present in the system.
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