mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-12-28 14:24:09 +01:00
145 lines
4.1 KiB
Groff
145 lines
4.1 KiB
Groff
.\" Copyright (c) 1985, 1991, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)iostat.8 8.1 (Berkeley) 6/6/93
|
|
.\"
|
|
.Dd June 6, 1993
|
|
.Dt IOSTAT 8
|
|
.Os BSD 4
|
|
.Sh NAME
|
|
.Nm iostat
|
|
.Nd report
|
|
.Tn I/O
|
|
statistics
|
|
.Sh SYNOPSIS
|
|
.Nm iostat
|
|
.Op Fl c Ar count
|
|
.Op Fl M Ar core
|
|
.Op Fl N Ar system
|
|
.Op Fl w Ar wait
|
|
.Op Ar drives
|
|
.Sh DESCRIPTION
|
|
.Nm Iostat
|
|
displays kernel
|
|
.Tn I/O
|
|
statistics on terminal, disk and cpu
|
|
operations.
|
|
.Pp
|
|
The options are as follows:
|
|
.Bl -tag -width flag
|
|
.It Fl c
|
|
Repeat the display
|
|
.Ar count
|
|
times.
|
|
The first display is for the time since a reboot and each subsequent
|
|
report is for the time period since the last display.
|
|
If no
|
|
.Ar wait
|
|
interval is specified, the default is 1 second.
|
|
.It Fl M
|
|
Extract values associated with the name list from the specified core
|
|
instead of the default
|
|
.Dq Pa /dev/kmem .
|
|
.It Fl N
|
|
Extract the name list from the specified system instead of the default
|
|
.Dq Pa /kernel .
|
|
.It Fl w
|
|
Pause
|
|
.Ar wait
|
|
seconds between each display.
|
|
If no repeat
|
|
.Ar count
|
|
is specified, the default is infinity.
|
|
.El
|
|
.Pp
|
|
.Nm Iostat
|
|
displays its information in the following format:
|
|
.Bl -tag -width flag
|
|
.It tty
|
|
.Bl -tag -width indent -compact
|
|
.It tin
|
|
characters read from terminals
|
|
.It tout
|
|
characters written to terminals
|
|
.El
|
|
.It disks
|
|
Disk operations (this field is system dependent).
|
|
The header of the field is the disk name and unit number.
|
|
If more than four disk drives are configured in the system,
|
|
.Nm iostat
|
|
displays only the first four drives.
|
|
To force
|
|
.Nm iostat
|
|
to display specific drives, their names may be supplied on the command
|
|
line.
|
|
.Pp
|
|
.Bl -tag -width indent -compact
|
|
.It sps
|
|
sectors transferred per second
|
|
.It tps
|
|
transfers per second
|
|
.It msps
|
|
milliseconds per average seek (including implied
|
|
seeks and rotational latency)
|
|
.El
|
|
.It cpu
|
|
.Bl -tag -width indent -compact
|
|
.It \&us
|
|
% of cpu time in user mode
|
|
.It \&ni
|
|
% of cpu time in user mode running niced processes
|
|
.It \&sy
|
|
% of cpu time in system mode
|
|
.It \&in
|
|
% of cpu time in interrupt mode
|
|
.It \&id
|
|
% of cpu time in idle mode
|
|
.El
|
|
.El
|
|
.Sh FILES
|
|
.Bl -tag -width /dev/kmem -compact
|
|
.It Pa /kernel
|
|
Default kernel namelist.
|
|
.It Pa /dev/kmem
|
|
Default memory file.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr fstat 1 ,
|
|
.Xr netstat 1 ,
|
|
.Xr nfsstat 1 ,
|
|
.Xr \&ps 1 ,
|
|
.Xr systat 1 ,
|
|
.Xr vmstat 1 ,
|
|
.Xr pstat 8
|
|
.Pp
|
|
The sections starting with ``Interpreting system activity'' in
|
|
.%T "Installing and Operating 4.3BSD" .
|