About while(1){ yield(); sleep(1); } in project 5

[LEI]

Hello Professor,

I have read the discussions about how to stop the clients which finished their jobs. There are three methods:

1. while(1){ yield(); sleep(1); }  // cause the system to be slower

2. while(1){ yield(); }  // use 100% of CPU

3. P(&block_sem); // block on a semaphore which is initialized to 0.

 After trying all of them, I think the third one is the best. It blocks all the finished clients and cause the program to exit eventually when there are no clients running.

I saw your comments on the prior two approaches, but didn't see that about the third one. So, how do you think about it?

[Partha Dasgupta]

Third one is the best, but it requires a change to the scheduler to quit if no processes in the readyQ (or have an idle process).

Partha Dasgupta,
ASU/CIDSE/Computer Science & Eng. 
EMail: par...@asu.edu
http://cactus.eas.asu.edu/partha

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