IntelĀ® Trace Collector 9.1 Update 2 User and Reference Guide
PROTOFILE-NAME <file name>
VT_PROTOFILE_NAME
Specifies the name for the protocol file containing the config options and (optionally) summary statistics for a program run. It can be an absolute or relative pathname; in the latter case, it is interpreted relative to the current working directory of the process writing it.
If unspecified, the name is the name of the tracefile with the suffix .prot.