trace – show (real–time) process behavior
trace [ –d file ] [ –v ] [ –w ] [ pid ... ]
Trace displays the behavior of processes running on the machine.
In its window it shows a time line for each traced process. Running
processes appear as colored blocks, with arrows marking important
events in real–time processes (see proc(3)). Black up arrows mark
process releases, black down arrows mark process
deadlines, green down arrows mark times when a process yielded
the processor before its deadline, red down arrows mark times
when the process overran its allotted time.
Trace reads /proc/trace to retrieve trace events from the kernel scheduler. Trace events are binary data structures generated by the kernel scheduler. It is assumed that the reader of /proc/trace and the kernel providing it have the same byte order.
The options are:
Trace recognizes these keystroke commands while it is running:
/proc/trace trace event file
/sys/include/trace.h trace event data structures