 
   July 1, 1994                                                        SIS(1)
 
   print_delay [-alrs] [-m model] [-p n] [-f file-name] [node-list]
 
     Do a delay trace (static timing analysis) on the network depending on
     the specified model and print the delay data.  Without any arguments the
     routine will use the library model which assumes that the network is
     mapped and will print the arrival times, required times and the slack
     for all the nodes in the network.
 
     Specifying an optional node-list will print the delay data only for the
     specified nodes.
 
     The user can selectively have portions of the delay data printed.  The
     option -a will cause the arrival times to be printed. The option -r will
     cause the required times to be printed. The option -s will cause the
     slacks at nodes to be reported.  The option -l will cause the load
     driven by the node to be printed.
 
     The option -p n when specified with one of the options -[alrs] will
     print out the delay data so that the first n nodes with the most criti-
     cal values are printed. The critical portion of the delay data is deter-
     mined by the first of the options -[alrs] specified.  Thus specifying -p
     n -[al] prints the n nodes with the greatest arrival-time/load. For the
     -[rs] option the nodes with the smallest required-time/slack are
     printed.
 
     The delay model can be specified by the -m option followed by one of the
     following keywords --- unit, unit-fanout, library, mapped or tdc.
     Specifying unit results in delay being computed as 1 unit per node in
     the network.  unit-fanout adds an additional delay of 0.2 per fanout.
     If a library has been read in using the read_library command one can use
     more accurate models, mapped and library, by using data stored in the
     library. Using the model library assumes  that the network has been
     mapped. The mapped model does not make this assumption and will do a
     mapping of the nodes on an individual basis to compute a delay model for
     use during the delay trace.  The tdc model is an attempt to predict the
     delay of a node based on the distribution of arrival times. The parame-
     ters used in this model prediction are optionally specified using the -f
     option.
 
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