gprof does not show "time-spent"

[Dehong_Zhang]

Hi,

I am trying to do some profiling on Linux and OSF1.
I did include "-pg" when compiling and could get the "gmon.out" file.
But "gprof -b -p ***" shows all 0's for the time information, like:

granularity: each sample hit covers 0 byte(s) no time accumulated

  %   cumulative   self              self     total
 time   seconds   seconds    calls  ms/call  ms/call  name
  0.0       0.00     0.00       10     0.00     0.00  func__Fic [1]
  0.0       0.00     0.00        1     0.00     0.00  main [2]

Here func_Fic should have spent all the time.

Please advice.

Thanks and best regards,
Dehong