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This interface
is obsoleted by It is available from the compatibility library, libcompat.
The function returns accounting information for the current process
and for the terminated child processes of the current process. Either
or 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 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 and 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 and measure memory usage. They are computed by integrating
the number of memory pages in use each over 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 would have the value 5*60, where
would be the 60. The argument integrates data and stack segment usage,
while integrates text segment usage. The function reports the maximum
instantaneous sum of the text+data+stack core-resident page count. The
field gives the number of page faults which resulted in disk activity;
the field gives the number of page faults incurred in simulation of reference
bits; is the number of swaps which occurred. The number of file system
input/output events are reported in and These numbers account only for
real data supplied by the caching mechanism is charged only to the first
process to read or write the data.
The function appeared
in
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