Examine the list of system calls in Fig. 1-9. Which call do you think is likely to
Question:
Examine the list of system calls in Fig. 1-9. Which call do you think is likely to execute most quickly. Explain your answer.
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Process management Signals pid= fork()) pid = waitpid(pid, &statloc, opts) s = wait(&status) s = execve(name, argv, envp) exit(status) size = brk(addr) pid = getpid (0) pid = getpgrp (0) pid= setsid () 1 = ptrace(req, pid, addr, data) s = sigaction (sig, &act, &oldact) s = sigreturn(&context) s = sigprocmask(how, &set, &old) s = sigpending (set) s = sigsuspend (sigmask) s = kill(pid, sig) residual alarm(seconds) s = pause () Create a child process identical to the parent Wait for a child to terminate Old version of waitpid Replace a process core image Terminate process execution and return status Set the size of the data segment Return the caller's process id Return the id of the caller's process group Create a new session and return its proc. group id Used for debugging Define action to take on signals Return from a signal Examine or change the signal mask Get the set of blocked signals Replace the signal mask and suspend the process Send a signal to a process Set the alarm clock Suspend the caller until the next signal
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Among the listed system calls in Figure 19 the system call likely to execute most quickly is getpid ...View the full answer
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Related Book For
Operating Systems Design And Implementation
ISBN: 9780131429383
3rd Edition
Authors: Andrew Tanenbaum, Albert Woodhull
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