seeksize.d(1m) [mojave man page]

seeksize.d(1m)							   USER COMMANDS						    seeksize.d(1m)

NAME

       seeksize.d - print disk event seek report. Uses DTrace.

SYNOPSIS

       seeksize.d

DESCRIPTION

       seeksize.d is a simple DTrace program to print a report of disk event seeks by process.

       This can be used to identify whether processes are accessing the disks in a "random" or "sequential" manner. Sequential is often desirable,
       indicated by mostly zero length seeks.

       Since this uses DTrace, only users with root privileges can run this command.

EXAMPLES

       Sample until Ctrl-C is hit then print report,
	      # seeksize.d

FIELDS

       PID    process ID

       CMD    command and argument list

       value  distance in disk blocks (sectors)

       count  number of I/O operations

DOCUMENTATION

       See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with ver-
       bose descriptions explaining the output.

EXIT

       seeksize.d will sample until Ctrl-C is hit.

AUTHOR

       Brendan Gregg [Sydney, Australia]

SEE ALSO

       iosnoop(1M), bitesize.d(1M), dtrace(1M)

version 0.95							   May 14, 2005 						    seeksize.d(1m)

newproc.d(1m)							   USER COMMANDS						     newproc.d(1m)

NAME

       newproc.d - snoop new processes. Uses DTrace.

SYNOPSIS

       newproc.d

DESCRIPTION

       newproc.d is a DTrace OneLiner to snoop new processes as they are run.  The argument listing is printed.

       This is useful to identify short lived processes that are usually difficult to spot using traditional tools.

       Docs/oneliners.txt and Docs/Examples/oneliners_examples.txt in the DTraceToolkit contain this as a oneliner that can be cut-n-paste to run.

       Since this uses DTrace, only users with root privileges can run this command.

EXAMPLES

       This prints new processes until Ctrl-C is hit.
	      # newproc.d

FIELDS

       CPU    The CPU that recieved the event

       ID     A DTrace probe ID for the event

       FUNCTION:NAME
	      The DTrace probe name for the event

       remaining fields
	      These contains the argument listing for the new process

DOCUMENTATION

       See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with ver-
       bose descriptions explaining the output.

EXIT

       newproc.d will run forever until Ctrl-C is hit.

AUTHOR

       Brendan Gregg [Sydney, Australia]

SEE ALSO

       execsnoop(1M), dtrace(1M), truss(1)

version 1.00							   May 15, 2005 						     newproc.d(1m)