(use posix numbers srfi-4)
(define num-iter (or (if (> (length (argv)) 2)
(string->number (cadr (argv)))
#f)
43)) ;; Gigs memory to try to allocate
;; (print "Allocating up to " memsize "G memory. Note that due to the usage of the heap this will actually use up to " (* 2 memsize) "G")
(define (get-free)
(let ((indat (with-input-from-pipe
"free"
read-lines)))
(map string->number
(cdr
(string-split
(cadr indat))))))
(define-inline (cached dat)(list-ref dat 5))
(define-inline (used dat)(list-ref dat 1))
(define-inline (free dat)(list-ref dat 2))
(define-inline (k->G val)(/ val 1e6))
(define-inline (G->k val)(* val 1e6))
(define start-time (current-milliseconds))
(let loop ((n 0)
(dat (get-free))
(stuff '()))
(let ((bigvec (make-u32vector 200000000)))
(print n " Elapsed time: " (/ (- (current-milliseconds) start-time) 1000) " s "
"Cached: " (k->G (cached dat)) " G "
"Used: " (k->G (used dat)) " G ")
(if (< n num-iter)
(loop (+ n 1)(get-free) (cons bigvec stuff)))))
(exit)