I-Tasser running time

Hi

How long will one I-TASSER job take? Is there any methods to estimate the running time?

Several jobs have been running on our own server, and with the wall time of 72 hours, all of them are stopped as "run out of wall time".
One of the test sequence only has 16 amino acids, and with 72 hours, the job stopped at

4.1 run simulation
run 14 parallel simulations
Terminated

The script I used is :
$HOME/I-TASSER/I-TASSER2.1/I-TASSERmod/runI-TASSER.pl -libdir $HOME/I-TASSER/I-TASSER2.1 -seqname test_seq -datadir $HOME/I-TASSER/I-TASSER2.1/seq_input/test -usrname user -runstyle parallel -java_home $JAVA_HOME

one node with 4 processes are used on the server:
2.4 GHz dual-core Opteron processors
8 Gbytes memory per node (2 Gbytes per processor core)

I have to know the computing resource needed, so I can require for it on the server.

Thank you very much.

Jingran