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PROFILE(1)							    PROFILE(1)

NAME
       profile - MINIX system profiling control command

SYNOPSIS
       Statistical profiling:

       profile start [ -m memsize ] [ -o outfile ] [ -f frequency ]
       profile stop
       sprofalyze.pl

       Call profiling:

       profile get [ -m memsize ] [ -o outfile ]
       profile reset
       cprofalyze.pl

DESCRIPTION
       This command controls MINIX system profiling. There is support for sta‐
       tistical profiling, which causes a CMOS interrupt to  regularly	sample
       the  position  of  the  program counter, and call profiling, which uses
       compiler hooks to measure the time and frequency of call paths.

       For statistical profiling support, recompile the kernel	with  SPROFILE
       in <minix/config.h> set to 1. For call profiling support, recompile the
       system with new libraries with CPROFILE <minix/config.h> set to	1  and
       environment variable CPROFILE set to -Rcem-p.

OPTIONS
       start  start measuring using statistical profiling.

       stop   stop measuring using statistical profiling.

       get    retrieve call profiling data

       reset  reset call profiling data

       -m     memory buffer size used to store profiling data in, allocated by
	      the profile command.

       -o outfile
	      output file.

       -f frequency
	      frequency for statistical sampling.

       After you have the output file, analysis can be done using the  sprofa‐
       lyze.pl and cprofalyze.pl commands.

AUTHOR
       Rogier Meurs

								    PROFILE(1)

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