VTIMES(3C)              COMMAND REFERENCE              VTIMES(3C)



NAME
     vtimes - get information about resource utilization

SYNOPSIS
     vtimes(parvm, chvm)
     struct vtimes *parvm, *chvm;

DESCRIPTION
     This facility is superseded by getrusage(2).

     The vtimes command returns accounting information for the
     current process and for the terminated child processes of
     the current process.  Either par_vm or ch_vm or both may be
     0, in which case only the information for the pointers
     (which are non-zero) is returned.

     After the call, each buffer contains information as defined
     by the contents of the include file
     /usr/include/sys/vtimes.h:

          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 */
          };

     The vm_utime and 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
     vm_idrss and vm_ixrss measure memory usage and are computed
     by integrating the number of memory pages in use each over
     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 vm_idsrss would have
     the value 5*60, where vm_utime+vm_stime would be the 60;
     vm_idsrss integrates data and stack segment usage, while
     vm_ixrss integrates text segment usage.  The vm_maxrss field
     reports the maximum instantaneous sum of the text+data+stack
     core-resident page count.

     The vm_majflt field gives the number of page faults which
     resulted in disk activity; the vm_minflt field gives the
     number of page faults incurred in simulation of reference



Printed 3/13/89                                                 1

VTIMES(3C)              COMMAND REFERENCE              VTIMES(3C)



     bits; vm_nswap is the number of swaps which occurred.  The
     number of file system input/output events are reported in
     vm_inblk and vm_oublk; these numbers account only for real
     I/O; data supplied by the caching mechanism is charged only
     to the first process to read or write the data.

SEE ALSO
     time(1), time(1csh), getrusage(2), wait3(2), and times(3c).















































Printed 3/13/89                                                 2

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de:1038,2675;4097,352;
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