pkutaj

(define (add x y)
  (if (= x 0) y (add (- x 1) (+ y 1))))

pkutaj

(define (add_r x y)
  (if (= x 0) y (+ 1 (add_r (- x 1) y))))

pkutaj

3 4 |
2 5 | time  dimension of the process — CPU
1 6 |
0 7 V
7
----> space dimension of the process — RAM

pkutaj

| + 1 (add_r 2 4) -
| + 1 (+ 1 (add_r 1 4)) ---
| + 1 (+ 1 (+ 1 (add_r 0 4))) ------> space complexity
| + 1 (+ 1 (+ 1 4)) ---
| + 1 (+ 1 5) -
| + 1 6
V 7

pkutaj

# check current badness adjustment for a PID
cat /proc/<pid>/oom_score_adj

# make a process nearly immune to the OOM killer
# (requires CAP_SYS_RESOURCE / root)
echo -900 > /proc/<pid>/oom_score_adj

# make a process the preferred victim — useful for a
# deliberately sacrificial "canary" process
echo 1000 > /proc/<pid>/oom_score_adj

pkutaj

(define sq (lambda (n) (* n n)))
(assert (= (sq 5) 25)) ;PASS

pkutaj

(define sqs (lambda (x y) (+ (sq x) (sq y))))
(assert (= (sqs 2 3) 13)); PASS

pkutaj

;👇 eval operator
(sqs 2 3)
;👉 (lambda (x y) (+ (sq x) (sq y)))

pkutaj

;👇👇 eval operands
(sqs 2 3)
; 👉 2
; 👉 3

pkutaj

;👇 body of the procedure        ;👇 arguments
;(+ (sq x) (sq y)))              ; 2 3
;applied 👉 (+ (sq 2) (sq 3))