Multithreaded RPC-Based Distributed Task Processing System

Author: A.Melih Bostancıeri
Assignment Title: Multithreaded RPC-Based Distributed Task Processing System

General Information

• Course: CSE 303 – Fundamentals of Operating Systems
• Assignment: Homework 02 – RPC & Multithreading
• Language: C
• Platform: Linux/WSL

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Project Description

This project implements a distributed task processing system using Remote Procedure Call (RPC) and multithreading. The client sends tasks to a remote server, which queues and processes them using worker threads. The client can also query the server for task results.

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File Structure

client.c         # Client application
server_impl.c    # Server application (with worker threads)
task.x           # RPC interface definition
task.h           # Header generated by rpcgen
task_clnt.c      # Client code generated by rpcgen
task_svc.c       # Server code generated by rpcgen
task_xdr.c       # XDR code generated by rpcgen
Makefile         # Build instructions

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Build Instructions

1. Generate RPC files:

   rpcgen task.x

2. Build the project:

   make

This will produce the following binaries: client, server

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Run Instructions

Start the server first:

./server

Then start the client:

./client <server_ip>

Example:

./client localhost

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Supported Task Types

1. Reverse String
2. Sum of Integer List
3. Fibonacci Number

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Design Overview

• Server: Maintains a thread-safe queue, processes tasks with 3 worker threads, stores results in a protected array.
• Client: Menu-driven interface for submitting tasks and querying results.
• RPC: Communication over UDP, 256-byte limit for task and result strings.

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Test Scenarios

• Test each task type with sample inputs.
• Submit tasks from multiple clients concurrently.
• Query results before and after processing to check for "PENDING" and final result.

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Notes

• The server and client are implemented in C using POSIX threads.
• Code and build process are tested on Linux/WSL.

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