FEEDBACK(1)         RISC/os Reference Manual          FEEDBACK(1)



NAME
     feedback - generate a feedback file using MIPS profiler
          pixie and execution data analyzer prof.

SYNOPSIS
     feedback [ pixie options ] [ prof options ] [ -o
     feedback_file ] objfile [ objfile arguments ]

DESCRIPTION
     feedback invokes pixie(1) to add profiling code to an object
     file.  The object file generated by pixie is executed to
     obtain profiling information.  feedback then invokes prof(1)
     to analyse the profiling information.  prof can combine the
     profiling information files or produce a feedback file that
     lets the optimizer take into account the program's runtime
     behavior during a subsequent compilation.

     If the output of objfile needs to be redirected, but not the
     output of the feedback utility, the redirection characters
     need to be within quotes.

     The -o option specifies the name of the feedback file.  This
     can also be specified by the -feedback option of prof.  You
     should use only one of these options to specify a feedback
     file, not both.

     The feedback command accepts pixie (see pixie(1)) and prof
     (see prof(1)) options.

EXAMPLES
     In this example, feedback sends the profiling information to
     the standard output.

                 feedback myprog

     In this example, the profiling information is written to the
     file myprog.feedback.  This file may be used in subsequent
     compilations.

                 feedback -feedback myprog.feedback myprog

SEE ALSO
     pixie(1), prof(1).












                        Printed 11/19/92                   Page 1