context switch

Question

Let there are 4 process . P1, P2  ,P3, P4.   Round Robin used for scheduling , Time quantum = q . each process burst time is greater than q . all processs arrived at time t = 0.

now how we count the context switch.

_P1_P2_P3_P4_  

to count context switched all dashes need to consider .  or need to left  first or last.

plz explain ?

Comments

it depends on the question . gate always specified when we don't have to consider the start and end. so as here the context is saying that the time start from zero . so there are only 4 isolated process in the system and as the system has just started, don't consider the first and last one.

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according to u - --- 3 context switch ?

reply ......

Answer 1

as it is given Q> burst time so no one will end in once cycle. so again after all these q1 wil come. so definitely we have to consider . till the last process. what i think there is no need to count the last one. whichever it is.