User Guide

  • 2022.2
  • 08/08/2022
  • Public Content

Expanded ASCII output of STF Files


xstftool <STF file> [stftool options]
Valid options are those that work together with
stftool --dump
, the most important ones being:
  • --request
    : extract a subset of the data
  • --matched-vtf
    : put information about complex events like messages and collective operations into one line


is a simple wrapper around the
and the
Perl* script which tells the
to dump a given Structured Trace Format (STF) file in ASCII format and uses the script as a filter to make the output more readable.
It is intended to be used for doing custom analysis of trace data with scripts that parse the output to extract information not provided by the existing tools, or for situations where a few shell commands provide the desired information more quickly than a graphical analysis tool.


The output has the format of the ASCII Vampir* Trace Format (VTF), but entities like function names are not represented by integer numbers that cannot be understood without remembering their definitions, but rather inserted into each record. The CPU numbers that encode process and thread ranks resp. groups are also expanded.


The following examples compare the output of
stftool --dump
with the expanded output of
  • definition of a group
DEFGROUP 2147942402 "All_Processes" NMEMBS 2 2147483649 2147483650 DEFGROUP All_Processes NMEMBS 2 "Process_0" "Process_2"
  • a counter sample on thread 2 of the first process
8629175798 SAMP CPU 131074 DEF 6 UINT 8 3897889661 8629175798 SAMP CPU 2:1 DEF "PERF_DATA:PAPI_TOT_INS" UINT 8 3897889661

Product and Performance Information


Performance varies by use, configuration and other factors. Learn more at