1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" %sccs.include.redist.man% 5.\" 6.\" @(#)vtimes.3 8.1 (Berkeley) 06/04/93 7.\" 8.Dd 9.Dt VTIMES 3 10.Os BSD 4 11.Sh NAME 12.Nm vtimes 13.Nd get information about resource utilization 14.Sh SYNOPSIS 15.Fd #include <sys/vtimes.h> 16.Fn vtimes "struct vtimes *par_vm" "struct vtimes *ch_vm" 17.Sh DESCRIPTION 18.Bf -symbolic 19This interface is obsoleted by getrusage(2). 20It is available from the compatibility library, libcompat. 21.Ef 22.Pp 23The 24.Fn vtimes 25function 26returns accounting information for the current process and for 27the terminated child processes of the current 28process. Either 29.Fa par_vm 30or 31.Fa ch_vm 32or both may be 0, in which case only the information for the pointers 33which are non-zero is returned. 34.Pp 35After the call, each buffer contains information as defined by the 36contents of the include file 37.Pa /usr/include/sys/vtimes.h : 38.Bd -literal -offset indent 39struct vtimes { 40 int vm_utime; /* user time (*HZ) */ 41 int vm_stime; /* system time (*HZ) */ 42 /* divide next two by utime+stime to get averages */ 43 unsigned vm_idsrss; /* integral of d+s rss */ 44 unsigned vm_ixrss; /* integral of text rss */ 45 int vm_maxrss; /* maximum rss */ 46 int vm_majflt; /* major page faults */ 47 int vm_minflt; /* minor page faults */ 48 int vm_nswap; /* number of swaps */ 49 int vm_inblk; /* block reads */ 50 int vm_oublk; /* block writes */ 51}; 52.Ed 53.Pp 54The 55.Fa vm_utime 56and 57.Fa vm_stime 58fields give the user and system 59time respectively in 60ths of a second (or 50ths if that 60is the frequency of wall current in your locality.) The 61.Fa vm_idrss 62and 63.Fa vm_ixrss 64measure memory usage. They are computed by integrating the number of 65memory pages in use each 66over 67.Tn CPU 68time. They are reported as though computed 69discretely, adding the current memory usage (in 512 byte 70pages) each time the clock ticks. If a process used 5 core 71pages over 1 cpu-second for its data and stack, then 72.Fa vm_idsrss 73would have the value 5*60, where 74.Fa vm_utime+vm_stime 75would be the 60. 76The 77.Fa Vm_idsrss 78argument 79integrates data and stack segment 80usage, while 81.Fa vm_ixrss 82integrates text segment usage. 83The 84.Fa Vm_maxrss 85function 86reports the maximum instantaneous sum of the 87text+data+stack core-resident page count. 88.Pp 89The 90.Fa vm_majflt 91field gives the number of page faults which 92resulted in disk activity; the 93.Fa vm_minflt 94field gives the 95number of page faults incurred in simulation of reference 96bits; 97.Fa vm_nswap 98is the number of swaps which occurred. The 99number of file system input/output events are reported in 100.Fa vm_inblk 101and 102.Fa vm_oublk 103These numbers account only for real 104.Tn I/O ; 105data supplied by the caching mechanism is charged only 106to the first process to read or write the data. 107.Sh SEE ALSO 108.Xr time 2 , 109.Xr wait3 2 , 110.Xr getrusage 2 111.Sh HISTORY 112The 113.Fn vlimit 114function appeared in 115.Bx 4.2 . 116