The trace in sp.otf is in Open Trace Format (see http://www.paratools.com/otf).

Note that PragmaDev Studio will only be able to read OTF files, not write them. These files
are also usually quite big, so the default is to load them only partially to avoid performance
issues in the editor. The items in the 'View' -> 'Event range' menu allow to change the range
of displayed events from the OTF file.
