Project Overview (On going assignment, finish date: Dec 1, 2024)

This project implements a simplified operating system in Java, focusing on memory management and inter-process communication (IPC). The primary goal is to simulate core operating system concepts like virtual memory translation, TLB (Translation Lookaside Buffer) management, and IPC mechanisms between userland processes.

Virtual Memory Management:

Implements virtual-to-physical address translation using a page table and TLB for caching mappings. Includes page allocation and TLB handling, with functions to update and clear the TLB. Demonstrates mapping verification and error handling for missed mappings.

Inter-Process Communication (IPC):

Ping and Pong processes simulate message exchange between processes. Uses a basic kernel-managed message system where processes send and receive messages through a message queue. Message flow is demonstrated with incremented data exchanges and debug outputs for clear tracing.

Key Classes

Kernel: Manages process scheduling, TLB updates, and IPC functions. The kernel controls access to hardware-like resources, such as TLB and physical memory. Scheduler: Implements process scheduling, queue management, and state tracking for processes. The scheduler is also responsible for waiting and restoring processes as they interact via messages. Process Management: Includes classes for the Ping and Pong processes that continuously exchange messages, simulating inter-process communication and synchronization. **TLB Management: **Updates and verifies TLB entries for address translation, with random replacement on TLB miss. Current Features

Page Table and TLB Handling:

**updateTlb **adds a virtual-to-physical page mapping to the TLB, replacing entries if the TLB is full. **clearTlb **resets TLB entries using a for loop, ensuring no residual mappings. GetMapping handles virtual page requests, updating page tables, and verifying TLB consistency.

Inter-Process Messaging System:

Kernel handles messages between processes, allowing Ping and Pong to send and receive messages with incremental data. Demonstrates message queuing, descheduling/waking of processes, and message validation.