Megatest

;;    please-update:        #t
;;    update-mutex:         (make-mutex)
;;    updaters:             (make-hash-table)
;;    updating:             #f
;;    hide-not-hide-tabs:   #f
;;    target:               ""
;;    ))

(set! *journal-stats-enable* #f)

;;======================================================================
;; buttons color using image
;;======================================================================

(define *images* (make-hash-table))

    (if (and (not *journal-stats*)
	     (file-exists? dbdir))
	(tt:start-stats dbdir)) ;; fixme - find the right call to get the db directory
    
    ;; check the load on dbfname and add some delay using a droop curve of sorts
    (if *journal-stats*
	(let* ((load  (tt:get-journal-stats dbfname)))
	  (if (> load 0.1) ;; start activating delay at 10% journal load time
	      (let ((dely (* 50 (* load load)))) ;; 100% journal time=50sec delay
		(debug:print 0 *default-log-port* "Journal load "load" delaying queries "dely"s.")
		(thread-sleep! dely)))))
	
    (case (rmt:transport-mode)
      ((tcp)
       (let* ((start-time    (current-seconds)) ;; snapshot time so all use cases get same value
	      (attemptnum    (+ 1 attemptnum))

	 (have-resources         (and (if *journal-stats*
					  (let* ((dbfname (conc
							   (dbfile:run-id->dbnum run-id)
							   ".db"))
						 (load (tt:get-journal-stats dbfname)))
					    (if (> load 0.1) ;; dbs too busy to start more tests
						(begin
						  (debug:print-info 0 *default-log-port* "Gating launch due to db load "load" based on journal file observations for "dbfname)
						 #f)
						#t))
					  (begin
					    (debug:print-info 0 *default-log-port* "Journal gating not started for "run-id)
					    #t)) ;; if journal monitoring not started do not gate
				      (car run-limits-info)))
	 (num-running            (list-ref run-limits-info 1))
	 (num-running-in-jobgroup(list-ref run-limits-info 2)) 
	 (max-concurrent-jobs    (list-ref run-limits-info 3))
	 (job-group-limit        (list-ref run-limits-info 4))
	 ;; (prereqs-not-met        (rmt:get-prereqs-not-met run-id waitons hed item-path mode: testmode itemmaps: itemmaps))
	 ;; (prereqs-not-met         (mt:lazy-get-prereqs-not-met run-id waitons item-path mode: testmode itemmap: itemmap))

		      (if (eq? nth-try 'removed) ;; removed is removed - drop it NOW
			  (if (null? tal)
			      #f ;; yes, really
			      (list (car tal)(cdr tal) reg reruns))
			  (begin
			    (if (runs:lownoise (conc "FAILED prerequisites or other issue" hed) 60)
				(debug:print 0 *default-log-port* "WARNING: test " hed " has FAILED prerequisites or other issue. Internal state >" nth-try "< will be overridden and we'll retry."))
			    (let* ((test-id      (rmt:get-test-id run-id hed item-path))
				   (test-info    (rmt:get-testinfo-state-status run-id test-id)) ;; we need *current* info
				   (status       (db:test-status test-info)))
			      (if (equal? status "KEEP_TRYING")
				  (mt:test-set-state-status-by-testname-unless-completed run-id test-name item-path "COMPLETED" "PREQ_FAIL" #f)
				  (mt:test-set-state-status-by-testname run-id test-name item-path "NOT_STARTED" "KEEP_TRYING" #f)))
			    (hash-table-set! test-registry hed 'removed) ;; was 0
                            (if (not (and (null? reg) (null? tal)))

(defstruct jstats
  (count 0)
  (jcount (make-hash-table)) ;; 1.db => journal_count
  )

;; timeblk => jstats
(define *journal-stats* #f) ;; (make-hash-table))
(define *journal-stats-enable* #t) ;; change to #f to turn off

;; monte-carlo-esque random sampling of journal files
;; for all the files:
;;   if .journal
;;      update stats +1 +1
;;      update stats +1  0
;;
(define (tt:write-load-tracking dbdir)
  (if *journal-stats-enable*
      (let* ((cs    (current-seconds))
	     (key   (inexact->exact (quotient cs 10)))
	     (old   (- key 5)) ;; 4 x 10 seconds ago
	     (jstat (if (hash-table-exists? *journal-stats* key)
			(hash-table-ref *journal-stats* key )
			(let ((new (make-jstats)))
			  (hash-table-set! *journal-stats* key new)
			  new))))
	;; clear out old records
	(for-each
	 (lambda (key)
	   (if (< key old)
	       (hash-table-delete! *journal-stats* key)))
	 (hash-table-keys *journal-stats*))

	;; increment our count of observations
	(jstats-count-set! jstat (+ (jstats-count jstat) 1))
	
	;; now find and increment journal file counts
	(directory-fold
	 (lambda (fname res)
	   ;; is it a journal file?
	   (let ((parts (string-match "^(.*\\.db)-journal.*" fname)))
	     (match parts
		    ((_ dbfname)
		     (hash-table-set! (jstats-jcount jstat) dbfname
				      (+ (hash-table-ref/default (jstats-jcount jstat) dbfname 0) 1.0)
				      ))
		    (else #f)
		    )))
	 '()
	 dbdir 
     ))))

(define *journal-stats-mutex* (make-mutex))

(define (tt:journal-stats-run dbdir)
  (if (not *journal-stats*)(set! *journal-stats* (make-hash-table)))
  (let loop ()
    (mutex-lock! *journal-stats-mutex*)

  (thread-start!
   (make-thread
    (lambda ()(tt:journal-stats-run dbdir)) "Journal stats collection thread")))

(define (tt:get-journal-stats #!optional (dbfname #f))
  (let* ((result    (make-jstats))
	 (hitcounts (jstats-jcount result)))
    (if (and *journal-stats*
	     *journal-stats-enable*)
	(begin
	  (mutex-lock! *journal-stats-mutex*)
	  (hash-table-for-each
	   *journal-stats*
	   (lambda (k v) ;; key jstats
	     (let* ((count  (jstats-count v))
		    (jcount (jstats-jcount v))) ;; dbfname => hit count
	       (jstats-count-set! result
				  (+ (jstats-count result)
				     (jstats-count v)))
	       (hash-table-for-each
		jcount
		(lambda (dbfname hit-count)
		  (hash-table-set! hitcounts dbfname
				   (+ hit-count
				      (hash-table-ref/default hitcounts dbfname 0))))))))
	  (mutex-unlock! *journal-stats-mutex*))
	(debug:print 0 *default-log-port* "INFO: *journal-stats* not set."))
    ;; convert to normalized alist
    (let* ((tot  (max (jstats-count result) 1)) ;; avoid divide by zero
	   (hits (jstats-jcount result)) ;; 1.db => count
	   (res  (hash-table-map
		  hits
		  (lambda (fname hitcount)
		    (cons fname (/ hitcount tot))))))
      (if dbfname
	  (or (alist-ref dbfname res equal?) 0)