VProf & native events

[Rick Kufrin <rkufrin@ncsa.uiuc.edu>]

The recent VProf installs on Mercury and Tungsten have been modified to
allow the use of processor native events in addition to PAPI preset
events.  Use is as normal (through the VMON environment variable).

Here are a few ways that you can learn of the available native events:

- through the PAPI 3 "native_avail" test case (in share/papi/ctests 
  underneath the top-level PAPI 3 install)

- with the "pfmon" or "perfex" tools (the Pentium 4 events may have
  tags appended that you'll need to specify, see native_avail output
  for examples)

- through the vendor documentation listed at the NCSA PAPI page.  The
  vendor docs are also the resource to use to learn exactly what each
  native event reports

Rick