stats

早期freebsd实现

#	@(#)stats	8.1 (Berkeley) 6/10/93
#
# disk statistics

define dstat
	set $op=(struct sdop *)&($arg0[$arg2])
	set $i=$arg1
	while ($i) 
		printf "$arg3 "
		printf "%d %d 0x%x 0x%x %d", $op->bp, $op->bufsize, $op->blkno, $op->when.tv_sec, $op->when.tv_usec
		if ($op->op & 1)
			printf " READ\n"
		else
			printf " WRITE\n"
		end
		set $op = $op + 1
		set $i = $i - 1
	end
end