Megatest

	  #f)) ;; #f flags do not loop
     (else
      (debug:print 4 "ERROR: No handler for this condition.")
      (list (car newtal)(cdr newtal) reg reruns)))))

(define (runs:process-expanded-tests hed tal reg reruns reglen regfull test-record runname test-name item-path jobgroup max-concurrent-jobs run-id waitons item-path testmode test-patts required-tests test-registry registry-mutex flags keyvals run-info)
  (let* ((run-limits-info         (runs:can-run-more-tests jobgroup max-concurrent-jobs)) ;; look at the test jobgroup and tot jobs running
	 ;; (open-run-close runs:can-run-more-tests #f jobgroup max-concurrent-jobs)) ;; look at the test jobgroup and tot jobs running
	 (have-resources          (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         (mt:get-prereqs-not-met run-id waitons item-path mode: testmode))
	 (fails                   (runs:calc-fails prereqs-not-met))
	 (non-completed           (runs:calc-not-completed prereqs-not-met))
	 (loop-list               (list hed tal reg reruns)))
    (debug:print-info 4 "have-resources: " have-resources " prereqs-not-met: (" 
		      (string-intersperse 
		       (map (lambda (t)
			      (if (vector? t)
				  (conc (db:test-get-state t) "/" (db:test-get-status t))
				  (conc " WARNING: t is not a vector=" t )))
			    prereqs-not-met) ", ") ") fails: " fails)
    (debug:print-info 4 "hed=" hed "\n  test-record=" test-record "\n  test-name: " test-name "\n  item-path: " item-path "\n  test-patts: " test-patts)
    
    ;; Don't know at this time if the test have been launched at some time in the past
    ;; i.e. is this a re-launch?
    (debug:print-info 4 "run-limits-info = " run-limits-info)
    
    (cond ;; INNER COND #1 for a launchable test
     
     ;; Check item path against item-patts, 
     ;;
     ((not (tests:match test-patts (tests:testqueue-get-testname test-record) item-path required: required-tests)) ;; This test/itempath is not to be run
      ;; else the run is stuck, temporarily or permanently
      ;; but should check if it is due to lack of resources vs. prerequisites
      (debug:print-info 1 "Skipping " (tests:testqueue-get-testname test-record) " " item-path " as it doesn't match " test-patts)
      ;; (thread-sleep! *global-delta*)
      (if (or (not (null? tal))(not (null? reg)))
	  (set! loop-list
		(list (runs:queue-next-hed tal reg reglen regfull)
		      (runs:queue-next-tal tal reg reglen regfull)
		      (runs:queue-next-reg tal reg reglen regfull)
		      reruns))))

     
     ;; Register tests 
     ;;
     ((not (hash-table-ref/default test-registry (runs:make-full-test-name test-name item-path) #f))
      (debug:print-info 4 "Pre-registering test " test-name "/" item-path " to create placeholder" )
      (let ((th (make-thread (lambda ()
			       (mutex-lock! registry-mutex)
			       (hash-table-set! test-registry (runs:make-full-test-name test-name item-path) 'start)
			       (mutex-unlock! registry-mutex)
			       ;; If haven't done it before register a top level test if this is an itemized test
			       (if (not (eq? (hash-table-ref/default test-registry (runs:make-full-test-name test-name "") #f) 'done))
				   (cdb:tests-register-test *runremote* run-id test-name ""))
			       (cdb:tests-register-test *runremote* run-id test-name item-path)
			       (mutex-lock! registry-mutex)
			       (hash-table-set! test-registry (runs:make-full-test-name test-name item-path) 'done)
			       (mutex-unlock! registry-mutex))
			     (conc test-name "/" item-path))))
	(thread-start! th))
      (runs:shrink-can-run-more-tests-count)   ;; DELAY TWEAKER (still needed?)
      (if (and (null? tal)(null? reg))
	  (set! loop-list (list hed tal (append reg (list hed)) reruns))
	  (set! loop-list (list (runs:queue-next-hed tal reg reglen regfull)
				(runs:queue-next-tal tal reg reglen regfull)
				;; NB// Here we are building reg as we register tests
				;; if regfull we must pop the front item off reg
				(if regfull
				    (append (cdr reg) (list hed))
				    (append reg (list hed)))
				reruns))))
     
     ;; At this point hed test registration must be completed.
     ;;
     ((eq? (hash-table-ref/default test-registry (runs:make-full-test-name test-name item-path) #f)
	   'start)
      (debug:print-info 0 "Waiting on test registration(s): "
			(string-intersperse 
			 (filter (lambda (x)
				   (eq? (hash-table-ref/default test-registry x #f) 'start))
				 (hash-table-keys test-registry))
			 ", "))
      (thread-sleep! 0.1)
      (set! loop-list (list hed tal reg reruns)))
     
     ;; If no resources are available just kill time and loop again
     ;;
     ((not have-resources) ;; simply try again after waiting a second
      (debug:print-info 1 "no resources to run new tests, waiting ...")
      ;; Have gone back and forth on this but db starvation is an issue.
      ;; wait one second before looking again to run jobs.
      (thread-sleep! 1) ;; (+ 2 *global-delta*))
      ;; could have done hed tal here but doing car/cdr of newtal to rotate tests
      (set! loop-list (list (car newtal)(cdr newtal) reg reruns)))
     ;; (loop hed tal reg reruns))
     
     ;; This is the final stage, everything is in place so launch the test
     ;;
     ((and have-resources
	   (or (null? prereqs-not-met)
	       (and (eq? testmode 'toplevel)
		    (null? non-completed))))
      (run:test run-id run-info keyvals runname test-record flags #f test-registry)
      (hash-table-set! test-registry (runs:make-full-test-name test-name item-path) 'running)
      (runs:shrink-can-run-more-tests-count)  ;; DELAY TWEAKER (still needed?)
      ;; (thread-sleep! *global-delta*)
      (if (or (not (null? tal))(not (null? reg)))
	  (set! loop-list (list (runs:queue-next-hed tal reg reglen regfull)
				(runs:queue-next-tal tal reg reglen regfull)
				(runs:queue-next-reg tal reg reglen regfull)
				reruns))))

     
     ;; must be we have unmet prerequisites
     ;;
     (else
      (debug:print 4 "FAILS: " fails)
      ;; If one or more of the prereqs-not-met are FAIL then we can issue
      ;; a message and drop hed from the items to be processed.
      (if (null? fails)
	  (begin
	    ;; couldn't run, take a breather
	    (debug:print-info 4 "Shouldn't really get here, race condition? Unable to launch more tests at this moment, killing time ...")
	    ;; (thread-sleep! (+ 0.01 *global-delta*)) ;; long sleep here - no resources, may as well be patient
	    ;; we made new tal by sticking hed at the back of the list
	    (set! loop-list (list (car newtal)(cdr newtal) reg reruns)))
	  ;; the waiton is FAIL so no point in trying to run hed ever again
	  (if (or (not (null? reg))(not (null? tal)))
	      (if (vector? hed)
		  (begin 
		    (debug:print 1 "WARN: Dropping test " (db:test-get-testname hed) "/" (db:test-get-item-path hed)
				 " from the launch list as it has prerequistes that are FAIL")
		    (runs:shrink-can-run-more-tests-count) ;; DELAY TWEAKER (still needed?)
		    ;; (thread-sleep! *global-delta*)
		    (hash-table-set! test-registry (runs:make-full-test-name test-name item-path) 'removed)
		    (set! loop (list (runs:queue-next-hed tal reg reglen regfull)
				     (runs:queue-next-tal tal reg reglen regfull)
				     (runs:queue-next-reg tal reg reglen regfull)
				     (cons hed reruns))))
		  (begin
		    (debug:print 1 "WARN: Test not processed correctly. Could be a race condition in your test implementation? " hed) ;;  " as it has prerequistes that are FAIL. (NOTE: hed is not a vector)")
		    (runs:shrink-can-run-more-tests-count) ;; DELAY TWEAKER (still needed?)
		    (set! loop-list (list hed tal reg reruns))))))))
    (debug:print-info 4 "runs:process-expanded-tests, loop-list=" loop-list)
    loop-list)) ;; END OF INNER COND

;; End of INNER COND for launchable test.


;; test-records is a hash table testname:item_path => vector < testname testconfig waitons priority items-info ... >
(define (runs:run-tests-queue run-id runname test-records keyvals flags test-patts required-tests reglen-in)
  ;; At this point the list of parent tests is expanded 
  ;; NB// Should expand items here and then insert into the run queue.
  (debug:print 5 "test-records: " test-records ", flags: " (hash-table->alist flags))
  (let ((run-info              (cdb:remote-run db:get-run-info #f run-id))

	 ;; 
	 ((not items)
	  (debug:print-info 4 "OUTER COND: (not items)")
	  (if (and (not (tests:match test-patts (tests:testqueue-get-testname test-record) item-path required: required-tests))
		   (not (null? tal)))
	      (loop (car tal)(cdr tal) reg reruns))
	  (let ((loop-list (runs:process-expanded-tests hed tal reg reruns reglen regfull test-record runname test-name item-path jobgroup max-concurrent-jobs run-id waitons item-path testmode test-patts required-tests test-registry registry-mutex flags keyvals run-info)))
	    (apply loop loop-list)))

	 ;; case where an items came in as a list been processed
	 ((and (list? items)     ;; thus we know our items are already calculated
	       (not   itemdat))  ;; and not yet expanded into the list of things to be done
	  (debug:print-info 4 "INNER COND: (and (list? items)(not itemdat))")
	  (if (and (debug:debug-mode 1) ;; (>= *verbosity* 1)
		   (> (length items) 0)