DG/UX 5.4 DIFFERENCES
The WCPU and SIZE columns are not shown, nor is the "last pid" display, as this information is not available from the kernel. A "processor utilization" column is added, with the heading C. This number reflects a process' relative interactivity, represented by an integer from 0 to 7. A process with 7 is highly interactive. A process with 0 is not considered interactive, but uses mostly CPU resources. The "nice" processor time is not shown, but a "io_wait" processor state is added, represented the time spent waiting on I/O operations. This is currently always set to zero. Process are considered "idle" unless they are in "run" or "wait" state. Process are considered to be "system" processes if they have uid=0 and ppid=1. Percent CPU is not maintained by the kernel, and has to be calculated by top, by dividing the difference in system+user time by the delay period. The DG/UX 5.4 port was written by Mike Williams <mike@inform.co.nz>.