Provided by: lmbench-doc_3.0-a7-1ubuntu1_all bug

NAME

       lat_proc - process creation tests

SYNOPSIS

       lat_proc  [  -P  <parallelism>  ] [ -W <warmups> ] [ -N <repetitions> ]
       procedure|fork|exec|shell

DESCRIPTION

       lat_proc  creates  processes  in  three  different  forms,  each   more
       expensive  than  the last.  The purposes is to measure the time that it
       takes to create a basic thread of control.

       The forms are listed and described below:

       Process fork+exit   The time it takes  to  split  a  process  into  two
                           (nearly)  identical copies and have one exit.  This
                           is how new processes are created but  is  not  very
                           useful  since  both  processes  are  doing the same
                           thing.

       Process fork+execve The time it takes to create a new process and  have
                           that  new  process  run a new program.  This is the
                           inner loop of all shells (command interpreters).

       Process fork+/bin/sh -c
                           The time it takes to create a new process and  have
                           that  new  process  run a new program by asking the
                           system shell to find that program and run it.  This
                           is  how  the  C  library interface called system is
                           implemented.  It is the most general and  the  most
                           expensive.

OUTPUT

       Output is in microseconds per operation like so:

       Process fork+exit: 6054 microseconds
       Process fork+execve: 11212 microseconds
       Process fork+/bin/sh -c: 44346 microseconds

ACKNOWLEDGEMENT

       Funding   for  the  development  of  this  tool  was  provided  by  Sun
       Microsystems Computer Corporation.

SEE ALSO

       lmbench(8).

AUTHOR

       Carl Staelin and Larry McVoy

       Comments, suggestions, and bug reports are always welcome.

(c)1994 Larry McVoy                 $Date$                         LAT_PROC(8)