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Top Forums UNIX for Dummies Questions & Answers Query on Running Multiple processes in background Post 302456567 by gpta_varun on Friday 24th of September 2010 02:59:11 PM
Old 09-24-2010
Thanks for the reply vbe !

But before I dwell further ,
I have some queries:

In case I run multiple processes from a script ,
1) Are all the processes allocated to a single CPU or multiple CPU ?
2) Can there be a possibility that a lot of time is wasted in scheduling the processes , allocated to single CPU?

3) In case of a fork() , are the child processes allocated to multiple CPUs for execution ? If not , can we do so ?
 

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wait(1) 						      General Commands Manual							   wait(1)

NAME
wait - await process completion SYNOPSIS
[pid] DESCRIPTION
If no argument is specified, waits until all processes (started with of the current shell have completed, and reports on abnormal termina- tions. If a numeric argument pid is given and is the process ID of a background process, waits until that process has completed. Other- wise, if pid is not a background process, exits without waiting for any processes to complete. Because the system call must be executed in the parent process, the shell itself executes without creating a new process (see wait(2)). Command-Line Arguments supports the following command line arguments: The unsigned decimal integer process ID of a command, whose termination is to wait for. WARNINGS
Some processes in a 2-or-more-stage pipeline may not be children of the shell, and thus cannot be waited for. SEE ALSO
csh(1), ksh(1), sh-posix(1), sh(1), wait(2). STANDARDS CONFORMANCE
wait(1)
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