Classifying IP Addresses

Per-Client Process = Expensive, duplicates the entire state Per-Client Thread = Threads share the same address space Constrained Multitasking = Overhead increases after some point CS556 = Distributed Systems Tutorial

waitpid((pid_t) -1, NULL, WHOANG) = Wait for a child process to terminate pthread_create (&threadID, NULL, ThreadMain, (void *) threadArgs) = Create a new thread HandleTCPClient(clntSock) = Handle a client request free(threadArgs) = Free memory allocated for thread arguments

waitpid = Wait for a child process to terminate pthread_create = Create a new thread AcceptTCPConnection = Accept a new client connection CreateTCPServerSocket = Create a new TCP server socket

<p>Per-Client Process = Expensive due to duplication of state Per-Client Thread = Less expensive due to shared address space Constrained Multitasking = Overhead increases after some point Multitasking = No overhead</p> Signup and view all the answers

<p>struct ThreadArgs { int clntSock; } = C programming language pthread_detach(pthread_self()) = POSIX Threads void *ThreadMain(void *arg) = C programming language DieWithError(&quot;...&quot;) = Error handling function</p> Signup and view all the answers

<p>DieWithError = Handle error and exit CreateTCPServerSocket = Create a new TCP server socket HandleTCPClient = Handle a client request pthread_detach = Detach a thread from the parent process</p> Signup and view all the answers

<p>struct ThreadArgs = Hold thread arguments pthread_t = Hold thread ID int clntSock = Hold client socket descriptor unsigned short echoServPort = Hold server port number</p> Signup and view all the answers

<p>waitpid = Process ID pthread_create = Thread ID AcceptTCPConnection = Client socket descriptor CreateTCPServerSocket = Server socket descriptor</p> Signup and view all the answers

<p>Per-Client Process = Easy to implement Per-Client Thread = Lightweight and efficient Constrained Multitasking = Prevents overhead from increasing Multitasking = No advantage</p> Signup and view all the answers

<p>if (argc != 2) { ... } = Check command line arguments if (pthread_create (&amp;threadID, NULL, ThreadMain, (void *) threadArgs) != 0) { ... } = Check thread creation if ((threadArgs = (struct ThreadArgs *) malloc(sizeof(struct ThreadArgs)))) == NULL) { ... } = Check memory allocation if (processID &lt; 0) { ... } = Check process ID</p> Signup and view all the answers