Megatest

;; get cpu load by reading from /proc/loadavg, return all three values
;;
(define (common:get-cpu-load)
  (with-input-from-file "/proc/loadavg" 
    (lambda ()(list (read)(read)(read)))))

(define (common:wait-for-cpuload maxload numcpus waitdelay #!key (count 1000))
(define (common:wait-for-cpuload maxload numcpus waitdelay #!key (count 1000) (msg #f))
  (let* ((loadavg (common:get-cpu-load))
	 (first   (car loadavg))
	 (next    (cadr loadavg))
	 (adjload (* maxload numcpus))
	 (loadjmp (- first next)))
    (cond
     ((and (> first adjload)
	   (> count 0))
      (debug:print-info 0 "waiting " waitdelay " seconds due to load " first " exceeding max of " adjload)
      (debug:print-info 0 "waiting " waitdelay " seconds due to load " first " exceeding max of " adjload (if msg msg ""))
      (thread-sleep! waitdelay)
      (common:wait-for-cpuload maxload numcpus waitdelay count: (- count 1)))
     ((and (> loadjmp numcpus)
	   (> count 0))
      (debug:print-info 0 "waiting " waitdelay " seconds due to load jump " loadjmp " > numcpus " numcpus)
      (debug:print-info 0 "waiting " waitdelay " seconds due to load jump " loadjmp " > numcpus " numcpus (if msg msg ""))
      (thread-sleep! waitdelay)
      (common:wait-for-cpuload maxload numcpus waitdelay count: (- count 1))))))

(define (common:get-num-cpus)
  (with-input-from-file "/proc/cpuinfo"
    (lambda ()
      (let loop ((numcpu 0)
		 (inl    (read-line)))
	(if (eof-object? inl)
	    numcpu
	    (loop (if (string-match "^processor\\s+:\\s+\\d+$" inl)
		      (+ numcpu 1)
		      numcpu)
		  (read-line)))))))

;; wait for normalized cpu load to drop below maxload
;;
(define (common:wait-for-normalized-load maxload #!key (msg #f))
  (let ((num-cpus (common:get-num-cpus)))
    (common:wait-for-cpuload maxload num-cpus 15 msg: msg)))

(define (get-uname . params)
  (let* ((uname-res (cmd-run->list (conc "uname " (if (null? params) "-a" (car params)))))
	 (uname #f))
    (if (null? (car uname-res))
	"unknown"
	(caar uname-res))))