143 lines
4.5 KiB
Groff
143 lines
4.5 KiB
Groff
.\" Copyright (c) 1980, 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.
|
|
.\"
|
|
.\" @(#)vtimes.3 8.1 (Berkeley) 6/4/93
|
|
.\"
|
|
.Dd June 4, 1993
|
|
.Dt VTIMES 3
|
|
.Os BSD 4
|
|
.Sh NAME
|
|
.Nm vtimes
|
|
.Nd get information about resource utilization
|
|
.Sh SYNOPSIS
|
|
.Fd #include <sys/vtimes.h>
|
|
.Fn vtimes "struct vtimes *par_vm" "struct vtimes *ch_vm"
|
|
.Sh DESCRIPTION
|
|
.Bf -symbolic
|
|
This interface is obsoleted by
|
|
.Xr getrusage 2 .
|
|
It is available from the compatibility library, libcompat.
|
|
.Ef
|
|
.Pp
|
|
The
|
|
.Fn vtimes
|
|
function
|
|
returns accounting information for the current process and for
|
|
the terminated child processes of the current
|
|
process. Either
|
|
.Fa par_vm
|
|
or
|
|
.Fa ch_vm
|
|
or both may be 0, in which case only the information for the pointers
|
|
which are non-zero is returned.
|
|
.Pp
|
|
After the call, each buffer contains information as defined by the
|
|
contents of the include file
|
|
.Pa /usr/include/sys/vtimes.h :
|
|
.Bd -literal -offset indent
|
|
struct vtimes {
|
|
int vm_utime; /* user time (*HZ) */
|
|
int vm_stime; /* system time (*HZ) */
|
|
/* divide next two by utime+stime to get averages */
|
|
unsigned vm_idsrss; /* integral of d+s rss */
|
|
unsigned vm_ixrss; /* integral of text rss */
|
|
int vm_maxrss; /* maximum rss */
|
|
int vm_majflt; /* major page faults */
|
|
int vm_minflt; /* minor page faults */
|
|
int vm_nswap; /* number of swaps */
|
|
int vm_inblk; /* block reads */
|
|
int vm_oublk; /* block writes */
|
|
};
|
|
.Ed
|
|
.Pp
|
|
The
|
|
.Fa vm_utime
|
|
and
|
|
.Fa vm_stime
|
|
fields give the user and system
|
|
time respectively in 60ths of a second (or 50ths if that
|
|
is the frequency of wall current in your locality.) The
|
|
.Fa vm_idrss
|
|
and
|
|
.Fa vm_ixrss
|
|
measure memory usage. They are computed by integrating the number of
|
|
memory pages in use each
|
|
over
|
|
.Tn CPU
|
|
time. They are reported as though computed
|
|
discretely, adding the current memory usage (in 512 byte
|
|
pages) each time the clock ticks. If a process used 5 core
|
|
pages over 1 cpu-second for its data and stack, then
|
|
.Fa vm_idsrss
|
|
would have the value 5*60, where
|
|
.Fa vm_utime+vm_stime
|
|
would be the 60.
|
|
The
|
|
.Fa Vm_idsrss
|
|
argument
|
|
integrates data and stack segment
|
|
usage, while
|
|
.Fa vm_ixrss
|
|
integrates text segment usage.
|
|
The
|
|
.Fa Vm_maxrss
|
|
function
|
|
reports the maximum instantaneous sum of the
|
|
text+data+stack core-resident page count.
|
|
.Pp
|
|
The
|
|
.Fa vm_majflt
|
|
field gives the number of page faults which
|
|
resulted in disk activity; the
|
|
.Fa vm_minflt
|
|
field gives the
|
|
number of page faults incurred in simulation of reference
|
|
bits;
|
|
.Fa vm_nswap
|
|
is the number of swaps which occurred. The
|
|
number of file system input/output events are reported in
|
|
.Fa vm_inblk
|
|
and
|
|
.Fa vm_oublk
|
|
These numbers account only for real
|
|
.Tn I/O ;
|
|
data supplied by the caching mechanism is charged only
|
|
to the first process to read or write the data.
|
|
.Sh SEE ALSO
|
|
.Xr time 2 ,
|
|
.Xr wait3 2 ,
|
|
.Xr getrusage 2
|
|
.Sh HISTORY
|
|
The
|
|
.Fn vlimit
|
|
function appeared in
|
|
.Bx 4.2 .
|