Format of type-1 trace records

By examining the trace records, you can determine the function that was being traced as well as the order in which a series of system operations took place.

In the example trace record in the following figure, the number in the trace sequence field in each entry identifies where that trace entry fits in the sequence of system operations. In addition, each trace entry provides pertinent information about that function.

Figure 1. General trace record format
Graphic is a 4 column, 1 row table. Column 1 is labeled "WORD 0" and is subdivided into 3 equal subcolumns. Each subcolumn is identified by an arrow with a definition. Subcolumn 1 is the "trace function code or subcode." Subcolumn 2 is the "relative PST number or region identifier." Subcolumn 3 is the "trace sequence field." Column 2 is labeled "WORD 1." Column 3 is labeled "WORD 2." Column 4 is labeled "WORD 3."

You can find the format of the trace entries by assembling macro IDLIVSAM TRACENT. Assembling IDLIVSAM after each system definition ensures that you have a current mapping of the trace record formats.