X'6A' trace entry

The X'6A trace entry

 TRACE ID   = X'6A' 
 
       word 0 — byte 1 - X'6A' - Sequential Buffering buffer 
                                 evaluation trace entry
                byte 2 - PST number
                bytes 3-4 - Trace sequence number
       word 1 — bytes 1–2 - DMB number
              - byte 3 – DCB number
              - byte 4 - Not used
       word 2 — byte 1 - Type of evaluation (see note 1)
              - byte 2 - Not used
              - byte 3 - Result of evaluation of sequentially 
                         (see note 2)
              - byte 4 - Result of evaluation of I/O rate (see note 2)
       word 3 — DSG address
       word 4 - SBPSTCNB (=SBH CALL NUMBER THIS PST)
       word 5 - byte 1 - Not used
              - bytes 2-4 - Threshold cost for SB logic
       word 6     - byte 1 - Not used
              - bytes 2-4 - Current cost of SB logic
       word 7 - bytes 1-2 - Threshold value for I/O rate
              - bytes 3-4 - Current value of I/O rate