examples/ggp-wam.lisp @ ab7ad2d6f641

Optimize `find-anonymous-variables`

After some profiling I found that this function was taking 4% of the total
runtime just on its own.  The culprit was `tree-collect`, which does some
expensive things (like `(gensym)`).  Because we know exactly what we need we can
write something much faster, and profiling confirms that this function isn't
even on the map any more.
author Steve Losh <steve@stevelosh.com>
date Mon, 11 Jul 2016 21:38:03 +0000
parents 2a7cb53fb03f
children 5edeeac89e03
(in-package #:bones.wam)

;;;; Rules
(setf *database* (make-database))

(push-logic-frame)

(fact (role robot))

(facts (init (off p))
       (init (off q))
       (init (off r))
       (init (off s))
       (init (step num1)))


(rule (next (on p))
  (does robot a)
  (true (off p)))
(rule (next (on q))
  (does robot a)
  (true (on q)))
(rule (next (on r))
  (does robot a)
  (true (on r)))
(rule (next (off p))
  (does robot a)
  (true (on p)))
(rule (next (off q))
  (does robot a)
  (true (off q)))
(rule (next (off r))
  (does robot a)
  (true (off r)))

(rule (next (on p))
  (does robot b)
  (true (on q)))
(rule (next (on q))
  (does robot b)
  (true (on p)))
(rule (next (on r))
  (does robot b)
  (true (on r)))
(rule (next (off p))
  (does robot b)
  (true (off q)))
(rule (next (off q))
  (does robot b)
  (true (off p)))
(rule (next (off r))
  (does robot b)
  (true (off r)))

(rule (next (on p))
  (does robot c)
  (true (on p)))
(rule (next (on q))
  (does robot c)
  (true (on r)))
(rule (next (on r))
  (does robot c)
  (true (on q)))
(rule (next (off p))
  (does robot c)
  (true (off p)))
(rule (next (off q))
  (does robot c)
  (true (off r)))
(rule (next (off r))
  (does robot c)
  (true (off q)))

(rule (next (off s))
  (does robot a)
  (true (off s)))
(rule (next (off s))
  (does robot b)
  (true (off s)))
(rule (next (off s))
  (does robot c)
  (true (off s)))
(rule (next (on s))
  (does robot a)
  (true (on s)))
(rule (next (on s))
  (does robot b)
  (true (on s)))
(rule (next (on s))
  (does robot c)
  (true (on s)))
(rule (next (off s))
  (does robot d)
  (true (on s)))
(rule (next (on s))
  (does robot d)
  (true (off s)))

(rule (next (on p))
  (does robot d)
  (true (on p)))
(rule (next (off p))
  (does robot d)
  (true (off p)))

(rule (next (on q))
  (does robot d)
  (true (on q)))
(rule (next (off q))
  (does robot d)
  (true (off q)))

(rule (next (on r))
  (does robot d)
  (true (on r)))
(rule (next (off r))
  (does robot d)
  (true (off r)))

(rule (next (step ?y))
  (true (step ?x))
  (succ ?x ?y))


(facts (succ num1 num2)
       (succ num2 num3)
       (succ num3 num4)
       (succ num4 num5)
       (succ num5 num6)
       (succ num6 num7)
       (succ num7 num8))

(facts (legal robot a)
       (legal robot b)
       (legal robot c)
       (legal robot d))


(rule (goal robot num100)
  (true (on p))
  (true (on q))
  (true (on r))
  (true (on s)))
(rule (goal robot num0)
  (true (off p)))
(rule (goal robot num0)
  (true (off q)))
(rule (goal robot num0)
  (true (off r)))
(rule (goal robot num0)
  (true (off s)))


(rule (terminal)
  (true (step num8)))
(rule (terminal)
  (true (on p))
  (true (on q))
  (true (on r))
  (true (on s)))

(finalize-logic-frame)


(defun extract (key results)
  (mapcar (lambda (result) (getf result key)) results))


(defun initial-state ()
  (extract '?what (query-all (init ?what))))

(defun terminalp ()
  (prove (terminal)))


(defun equiv-roles (move1 move2)
  (eq (car move1) (car move2)))

(defun legal-moves ()
  (let* ((individual-moves
           (query-map (lambda (move)
                        (cons (getf move '?role)
                              (getf move '?action)))
                      (legal ?role ?action)))
         (joint-moves
           (apply #'map-product #'list
                  (equivalence-classes #'equiv-roles individual-moves))))
    joint-moves))

(defun roles ()
  (extract '?role (query-all (role ?role))))

(defun goal-value (role)
  (getf (invoke-query `(goal ,role ?goal))
        '?goal))

(defun goal-values ()
  (invoke-query-all `(goal ?role ?goal)))

(defun next-state ()
  (extract '?what (query-all (next ?what))))


(defun apply-state (state)
  (push-logic-frame)
  (loop :for fact :in state
        :do (invoke-fact `(true ,fact)))
  (finalize-logic-frame))

(defun apply-moves (moves)
  (push-logic-frame)
  (loop :for (role . action) :in moves
        :do (invoke-fact `(does ,role ,action)))
  (finalize-logic-frame))


(defun clear-state ()
  (pop-logic-frame))

(defun clear-moves ()
  (pop-logic-frame))


(defun perform-move (joint-move)
  (prog2
    (apply-moves joint-move)
    (next-state)
    (clear-moves)))


(defvar *count* 0)
(defvar *role* nil)


;; nodes: (state . path)
(defun depth-first-search (&key exhaust)
  (let ((*count* 0)
        (*role* (first (roles)))
        (nodes (make-queue)))
    (enqueue (cons (initial-state) nil) nodes)
    (pprint
      (while (not (queue-empty-p nodes))
        (incf *count*)
        (destructuring-bind (state . path)
            (dequeue nodes)
          (apply-state state)
          ; (format t "Searching: ~S (~D remaining)~%" state (length remaining))
          (if (terminalp)
            (prog1
                (if (and (not exhaust) (eq 'num100 (goal-value *role*)))
                  (list state (reverse path))
                  nil)
              (clear-state))
            (let ((children
                    (loop :for joint-move :in (legal-moves)
                          :collect (cons (perform-move joint-move)
                                         (cons joint-move path)))))
              (clear-state)
              (queue-append nodes children))))))
    (format t "~%Searched ~D nodes.~%" *count*)))