Written 2: Obligatory Synchronization and Multithreading Programming Questions (...
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Written 2: Obligatory Synchronization and Multithreading Programming Questions (27 marks)Note: This question involves coding so it may better to not spend too long working on it without reading the other questions! Also part a and b are separate questions.Part a 18 marks)
Suppose the Memory Management Unit stores records of each processes' base and limit value per Unit 5A. These structures are stored in three different queues: an OS process queue, a high priority queue, and a low priority queue.
Write pseudocode to find the average allocated memory of all processes. Pseudocode is fine as well as using shorthand like "<insert all relevant headers>" or changing functions to be easier to deal with.
You may assume the following struct is used or develop your own: struct node{ int base; int limit; int process_id;
node* next; //A link to the next node node* back; //A link to the previous node.}
Part b 9 marks)
The nuclear reactor that powers Wombat OS' machine learning core has three processes that manages its runtime. You are asked to ensure that process 1 runs its statement 1 (e.g., initialize the reactor) first, then process 2 runs statement 2 (e.g., fill the reactor with water), then process 3 run statement 3 (e.g., run the reactor) using synchronization tools. Any out of sequence running of these statements would result in an explosion (e.g., Statement 3 runs before Statement 1). No justification for your code is necessary but it may help for marking. Pseudocode is fine as well as notation like P1: dothing(value) //Do a thing related to unit 4. S1 //This run statements 1