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ctlstat utility man page.
Author: Ken Merry <ken@FreeBSD.org>
$Id: //depot/users/kenm/FreeBSD-test2/usr.bin/ctlstat/ctlstat.8#2 $
$FreeBSD: releng/11.0/usr.bin/ctlstat/ctlstat.8 288059 2015-09-21 09:37:49Z mav $
.Dd September 21, 2015 .Dt CTLSTAT 8 .Os .Sh NAME .Nm ctlstat .Nd CAM Target Layer statistics utility .Sh SYNOPSIS .Nm .Op Fl t .Op Fl c Ar count .Op Fl C .Op Fl d .Op Fl D .Op Fl j .Op Fl l Ar lun .Op Fl n Ar numdevs .Op Fl p Ar port .Op Fl w Ar wait .Sh DESCRIPTION The .Nm utility provides statistics information for the CAM Target Layer. The first display (except for dump and JSON modes) shows average statistics since system startup. Subsequent displays show average statistics during the measurement interval.
p The options are as follows: l -tag -width 10n t Fl t Total mode. This displays separate columns with the total read and write output, and a combined total column that also includes non I/O operations. t Fl c Ar count Display statistics this many times. t Fl C Disable CPU statistics display. t Fl d Display DMA operation time (latency) instead of overall I/O time (latency). t Fl D Text dump mode. Dump statistics every 30 seconds in a text format suitable for parsing. No statistics are computed in this mode, only raw numbers are displayed. t Fl h Suppress display of the header. t Fl j JSON dump mode. Dump statistics every 30 seconds in JavaScript Object Notation (JSON) format. No statistics are computed in this mode, only raw numbers are displayed. t Fl l Ar lun Request statistics for the specified LUN. t Fl n Ar numdevs Display statistics for this many devices. t Fl p Ar port Request statistics for the specified port. t Fl w Ar wait Wait this many seconds in between displays. If this option is not specified, .Nm defaults to a 1 second interval. .El .Sh EXAMPLES .Dl ctlstat -t
p Display total statistics for the system with a one second interval.
p .Dl ctlstat -d -l 5 -C
p Display average DMA time for LUN 5 and omit CPU utilization.
p .Dl ctlstat -n 7 -w 10
p Display statistics for the first 7 LUNs, and display average statistics every 10 seconds. .Sh SEE ALSO .Xr cam 3 , .Xr cam 4 , .Xr ctl 4 , .Xr xpt 4 , .Xr camcontrol 8 , .Xr ctladm 8 , .Xr ctld 8 , .Xr iostat 8 .Sh AUTHORS .An Ken Merry Aq Mt ken@FreeBSD.org .An Will Andrews Aq Mt will@FreeBSD.org