Comtrol eCos - Manual (Page 651)

XX. Application profiling
The profile_gprof package provides a mechanism to measure the runtime performance of an application. This is
done by gathering an execution histogram.
When profiling is started on the target device, a TFTP server will be started which exports the single file PRO-
FILE.DAT This analysis data can then be fetched by connecting to the target with a TFTP client program and then
be processed by the gprof utility program.
NOTE: Be sure and specify binary mode transfers for this data file, which may not be the default with on some
TFTP client programs.
NOTE: The port used for this TFTP server is configurable. The default will be the IETF standard port of 69/UDP,
but it may be changed to any UDP port via the CYGNUM_PROFILE_TFTP_PORT CDL option.