Computer Architecture

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Multithreading Solaris 2 multi-threading example Threads Computer Architecture WS 06/07 Dr.-Ing. Stefan Freinatis Threads Figure from [Sil00 p.121] Windows 2000: • Implements one-to-one mapping • Each thread contains - a thread id - register set - separate user and kernel stacks - private data storage area Linux: • One-to-one model (pthreads), many-to-many (NGPT) • Thread creation is done through clone() system call. clone() allows a child to share the address space of the parent. This system call is unique to Linux, source code not portable to other UNIX systems. Computer Architecture WS 06/07 Dr.-Ing. Stefan Freinatis
Threads Java: • Provides support at language level. • Thread scheduling in JVM class Worker extends Thread { public void run() { System.out.println("I am a worker thread"); } } public class MainThread { public static void main(String args[]) { Worker worker1 = new Worker(); worker1.start(); System.out.println("I am the main thread"); } } Process Management Processes Threads Computer Architecture WS 06/07 Dr.-Ing. Stefan Freinatis Example: Creation of a thread by inheriting from Thread class thread creation and automatic call of run() method Interprocess Communication (IPC) CPU Scheduling Deadlocks Computer Architecture WS 06/07 Dr.-Ing. Stefan Freinatis
Page 1 and 2: Scheduling On a uniprocessor system
Page 3 and 4: Scheduling The OS selects processes
Page 5 and 6: Process Management Processes Thre
Page 7 and 8: Threads Three-threaded word process
Page 9 and 10: User Level Threads Thread managemen
Page 11: Multithreading Models One-to-One Mo
Page 15 and 16: Race Conditions Processes A and B
Page 17 and 18: Critical Regions Mutual exclusion u
Page 19 and 20: Mutual Exclusion Proposals for achi

Computer Architecture

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