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NAME
     perfcnt - trace the amount of time spent  in  each  function
     call

SYNOPSIS
     perfcnt [ -f bindfromlist ] [ t bindtolist ] [ -l perfcntlib
     ] executable [executable arguements ...]

AVAILABILITY
     SUNWosdem

DESCRIPTION
     perfcnt executes the specified command and tracks the amount
     of  time  that  is  spent  in  each procedure call.  perfcnt
     traces all of the procedure calls that occur between dynamic
     objects via the Procedure Linkage Table, so only those bound
     to the Procedure Linkage Table will be traced.

     perfcnt has the limitation that it  does  not  work  with  a
     threaded program nor any programs which use procedures which
     are dependent upon the stack frame.  See NOTES below

OPTIONS
     -f bindfromlist
               A colon seperated list of libraries that are to be
               traced.   Only  calls from these libraries will be
               traced.  The default is to trace all calls.

     -t bindtolist
               A colon seperated list of libraries taht are to be
               traced.   Only  calls  to  these libraries will be
               traced.  The default is to trace all calls.

     -l perfcntlib
               specify  an  alternate  perfcnt.so   Link-Auditing
               library to use.

EXAMPLES
     The example tracks the usage of the libelf.so.1 library when
     performing a nm.

     % perfcnt -t/usr/lib/libelf.so.1 nm /usr/lib/libc.so.1
     /usr/lib/libc.so.1:

     [Index]   Value      Size    Type  Bind  Other Shndx   Name

     [457]   |         0|       0|NOTY |LOCL |0    |UNDEF  |
     [2]     |       148|       0|SECT |LOCL |0    |1      |
     [3]     |     15232|       0|SECT |LOCL |0    |2      |
     [4]     |     45120|       0|SECT |LOCL |0    |3      |
     [5]     |     64024|       0|SECT |LOCL |0    |4      |
     [1893]  |    347660|      88|FUNC |LOCL |0    |12     |ypstub_perror
     [1895]  |    347280|     380|FUNC |LOCL |0    |12     |ypstub_sperror
     [714]   |    663472|       8|OBJT |LOCL |0    |22     |zero


     Perf Counts for: nm

                   SYMBOL    c_count     tim         avg. tim        tot. %
     ---------------------------------------------------------------------
               elf_getscn    1           4.03            4.03        0.01%
                 elf_kind    1           4.36            4.36        0.01%
             _elf32_fsize    7          50.80            7.26        0.09%
          _elf32_xlatetom    6          67.47           11.24        0.11%
              elf_version    1          72.50           72.50        0.12%
            elf32_getshdr    33         77.42            2.35        0.13%
              elf_nextscn    33         83.36            2.53        0.14%
                  elf_end    1         131.91          131.91        0.22%
              elf_getdata    2         138.74           69.37        0.23%
                elf_begin    1         171.74          171.74        0.29%
            elf32_getehdr    1         214.81          214.81        0.36%
              _elf_getscn    4254     9755.89            2.29        16.38%
               elf_strptr    4254    48784.97           11.47        81.91%
     ---------------------------------------------------------------------
                                                     Total Time: 59557.98


NOTES
     The perfcnt command is a demonstration of the  Link-Auditing
     interface  of  the  run-time  linker (which is documented in
     Linker and Libraries Guide ), and it is not usefull  in  all
     environments.   This  program  will not work with a threaded
     application and should not be used with one.  Also, in order
     to  track  the  time spent in a procedure both the entry and
     exit of the procedure must be tracked.  Because this  causes
     an  additional  stack frame to be created for each procedure
     call it is not compatible with all library  routines.   More
     details on this can be found in the Link-Auditing section of
     Linker and Libraries Guide

SEE ALSO
     ld.so.1(1)
     Linker and Libraries Guide

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