VMS Help DTM, SHOW, TEST_DESCRIPTION, Command Qualifiers, /BENCHMARK  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   Displays the file specification for the benchmark file associated
   with the specified test description.

   If you use the default benchmark when you create the test
   description, the benchmark file specification is displayed in
   the following format:

   test-name.BMK