"dynamic" case Post: 302317662

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LEARN ABOUT MOJAVE

rwsnoop

rwsnoop(1m)							   USER COMMANDS						       rwsnoop(1m)

NAME

       rwsnoop - snoop read/write events. Uses DTrace.

SYNOPSIS

       rwsnoop [-jPtvZ] [-n name] [-p PID]

DESCRIPTION

       This is measuring reads and writes at the application level. This matches the syscalls read, write, pread and pwrite.

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

OPTIONS

       -j     print project ID

       -P     print parent process ID

       -t     print timestamp, us

       -v     print time, string

       -Z     print zone ID

       -n name
	      process name to track

       -p PID PID to track

EXAMPLES

       Default output,
	      # rwsnoop

       Print zone ID,
	      # rwsnoop -.Monitor processes named "bash", # rwsnoop -n bash

FIELDS

       TIME   timestamp, us

       TIMESTR
	      time, string

       ZONE   zone ID

       PROJ   project ID

       UID    user ID

       PID    process ID

       PPID   parent process ID

       CMD    command name for the process

       D      direction, Read or Write

       BYTES  total bytes during sample

       FILE   filename,  if  file  based.  Reads and writes that are not file based, for example with sockets, will print "<unknown>" as the file-
	      name.

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

       rwsnoop will run forever until Ctrl-C is hit.

AUTHOR

       Brendan Gregg [Sydney, Australia]

SEE ALSO

       rwtop(1M), dtrace(1M)

version 0.70							   Jul 24, 2005 						       rwsnoop(1m)