trace man page on Plan9

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TRACE(1)							      TRACE(1)

       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  pro‐
       cesses  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 sched‐
       uler.  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:

       -d     specify an alternate trace event file

       -v     print events as they are read from the trace event file

       -w     run in a new window rather than using the current one

       Trace recognizes these keystroke commands while it is running:

       +      zoom in by a factor of two

       -      zoom out by a factor of two

       p      pause or resume

       q      quit


	      trace event file

	      trace event data structures


                             _         _         _ 
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                            | |       | |       | |     
                         __ | | __ __ | | __ __ | | __  
                         \ \| |/ / \ \| |/ / \ \| |/ /  
                          \ \ / /   \ \ / /   \ \ / /   
                           \   /     \   /     \   /    
                            \_/       \_/       \_/ 
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