rwbypid.d(1m) USER COMMANDS rwbypid.d(1m)NAME
rwbypid.d - read/write calls by PID. Uses DTrace.
SYNOPSIS
rwbypid.d
DESCRIPTION
This script tracks the number of reads and writes at the syscall level by processes, printing the totals in a report. This matches reads
and writes whether they succeed or not.
Since this uses DTrace, only users with root privileges can run this command.
EXAMPLES
This samples until Ctrl-C is hit.
# rwbypid.d
FIELDS
PID process ID
CMD process name
DIR direction, Read or Write
COUNT total calls
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
rwbypid.d will sample until Ctrl-C is hit.
AUTHOR
Brendan Gregg [Sydney, Australia]
SEE ALSO rwbbypid.d(1M), dtrace(1M)version 1.00 Jun 28, 2005 rwbypid.d(1m)
Check Out this Related Man Page
rwbytype.d(1m) USER COMMANDS rwbytype.d(1m)NAME
rwbytype.d - read/write bytes by vnode type. Uses DTrace.
SYNOPSIS
rwbytype.d
DESCRIPTION
This program identifies the vnode type of read/write activity - whether that is for regular files, sockets, character special devices, etc.
This is measuring at the application level, so file activity may well be cached by the system.
Since this uses DTrace, only users with root privileges can run this command.
EXAMPLES
This samples until Ctrl-C is hit.
# rwbytype.d
FIELDS
PID process ID
CMD process name
VNODE vnode type (describes I/O type)
DIR direction, Read or Write
BYTES total bytes
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
rwbytype.d will sample until Ctrl-C is hit.
AUTHOR
Brendan Gregg [Sydney, Australia]
SEE ALSO rwbypid.d(1M), rwbbypid.d(1M), dtrace(1M)version 0.70 Jan 11, 2006 rwbytype.d(1m)
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