From the NannyMUD documentation

LAST CHANGE

2000-12-19

FUNCTION

NAME
        mapping_rusage - System statistics in a mapping.


SYNTAX
	mapping mapping_rusage() - get some system statistics

DESCRIPTION
	This is really a wrapper on the output from the efun _rusage(),
	and the returned information is really of no use to anyone else
	than the Arch Sourcerer. The information is very dependant on
	what OS the game is run under.
	
	Some fields of the returned mapping is named below:

	field		process info
       -------         --------------
	"minflt"	minor page faults.
	"majflt"	major page faults.
	"nswap"		nr of swaps done so far for this process.
	"inblk"		nr of blocks read.
	"outblk"        nr of blocks written
	"msnd"
	"srcv"
	"sigs"
	"vctx"
	"ictx"
	"sysc"
	"ioch"
	"rtime"		real time         (in seconds)
	"utime"		user level time   (in seconds)
	"stime"		system level time (in seconds)
	"ttime"				  (in seconds)
	"tftime"			  (in seconds)
	"dftime"			  (in seconds)
	"ktime"				  (in seconds)
	"ltime"				  (in seconds)
	"slptime"			  (in seconds)
	"wtime"				  (in seconds)
	"stoptime"			  (in seconds)
	"brksize"	the total size of the process.
	"stksize"	the stack size.