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+.\" 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 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 .