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stap-merge(1)


NAME

   stap-merge - systemtap per-cpu binary merger

SYNOPSIS

   stap-merge [ OPTIONS ] [ INPUT FILENAMES ]

DESCRIPTION

   The  stap-merge  executable  applies  when  the -b option has been used
   while running a  stap  script.   The  -b  option  will  generate  files
   per-cpu,  based  on the timestamp field. Then stap-merge will merge and
   sort through the per-cpu files based on the timestamp field.

OPTIONS

   The systemtap merge executable supports the following options.

   -v     Verbose mode, displays three extra fields per set  of  collected
          data.

          [cpunumber,sequencenumberofdata,thelengthofthedataset]

   -o OUTPUT_FILENAME

          Specify  the  name  of  the file you would like the output to be
          redirected into.  If this  option  is  not  specified  than  the
          output will be pushed to standard out.

EXAMPLES

          $ stap -v -b -e 'probe syscall.open { printf("%s(%d) open\n",
          execname(), pid()) }'

   This should result in several stpd_cpu files (each labled with a number
   representing which cpu the file was produced from).

          $ stap-merge -v stpd_cpu0 stpd_cpu1

   Running the stap-merge program in the same directory as the stap script
   earlier  in  the  example,  will produce an ordered sequence of packets
   with the three part label for each set of data.  This  result  will  be
   pushed  through  the  standard  output.  An output file could have been
   specified using the "-o" option.

FILES

   Important files and their corresponding paths can be located in the
          stappaths (7) manual page.

SEE ALSO

   stapprobes(3stap),
   stappaths(7),
   staprun(8),
   stapvars(3stap),
   stapex(3stap),
   stap-server(8),
   gdb(1)

BUGS

   Use the Bugzilla link of the project web  page  or  our  mailing  list.
   http://sourceware.org/systemtap/,<systemtap@sourceware.org>.

                                                             STAP-MERGE(1)



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