[lib/workqueue] remove the useless 'delay' factor.

2006-02-02 Paul Jakma <paul.jakma@sun.com>

	* workqueue.h: (struct work_queue) Remove the delay field.
	  It served no purpose and just introduced bad behaviour.
	  Should be excised before its allowed to escape into 1.0.
	  This removes need for the 'flood' and runs_since_clear
	  fields.
	* workqueue.c: (general) excise delay factor between queue
	  runs, hence the 'flood' crap too.. See above.
	* bgp_route.c: (bgp_{clear_node,process}_queue_init) delay
	  field is removed from workqueue spec.

3 files changed, 24 insertions, 43 deletions

diff --git a/lib/ChangeLog b/lib/ChangeLog
index 600ffef7f..6c54cd359 100644
--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,3 +1,13 @@
+2006-02-02 Paul Jakma <paul.jakma@sun.com>
+
+	* workqueue.h: (struct work_queue) Remove the delay field.
+	  It served no purpose and just introduced bad behaviour.
+	  Should be excised before its allowed to escape into 1.0.
+	  This removes need for the 'flood' and runs_since_clear
+	  fields.
+	* workqueue.c: (general) excise delay factor between queue
+	  runs, hence the 'flood' crap too.. See above.
+
 2006-01-19 Paul Jakma <paul.jakma@sun.com>
 
 	* stream.c: (stream_getq_from) should use POSIX uint64_t
diff --git a/lib/workqueue.c b/lib/workqueue.c
index 0c61f5c4f..1fa16dedb 100644
--- a/lib/workqueue.c
+++ b/lib/workqueue.c
@@ -82,9 +82,7 @@ work_queue_new (struct thread_master *m, const char *queue_name)
   new->cycles.granularity = WORK_QUEUE_MIN_GRANULARITY;
 
   /* Default values, can be overriden by caller */
-  new->spec.delay = WORK_QUEUE_DEFAULT_DELAY;
   new->spec.hold = WORK_QUEUE_DEFAULT_HOLD;
-  new->spec.flood = WORK_QUEUE_DEFAULT_FLOOD;
     
   return new;
 }
@@ -133,7 +131,7 @@ work_queue_add (struct work_queue *wq, void *data)
   item->data = data;
   listnode_add (wq->items, item);
   
-  work_queue_schedule (wq, wq->spec.delay);
+  work_queue_schedule (wq, wq->spec.hold);
   
   return;
 }
@@ -172,14 +170,14 @@ DEFUN(show_work_queues,
   struct work_queue *wq;
   
   vty_out (vty, 
-           "%c%c %8s %11s %8s %21s%s",
-           ' ', ' ', "List","(ms)   ","Q. Runs","Cycle Counts   ",
+           "%c %8s %5s %8s %21s%s",
+           ' ', "List","(ms) ","Q. Runs","Cycle Counts   ",
            VTY_NEWLINE);
   vty_out (vty,
-           "%c%c %8s %5s %5s %8s %7s %6s %6s %s%s",
-           'P', 'F',
+           "%c %8s %5s %8s %7s %6s %6s %s%s",
+           'P',
            "Items",
-           "Delay","Hold",
+           "Hold",
            "Total",
            "Best","Gran.","Avg.", 
            "Name", 
@@ -187,11 +185,10 @@ DEFUN(show_work_queues,
  
   for (ALL_LIST_ELEMENTS_RO ((&work_queues), node, wq))
     {
-      vty_out (vty,"%c%c %8d %5d %5d %8ld %7d %6d %6u %s%s",
+      vty_out (vty,"%c %8d %5d %8ld %7d %6d %6u %s%s",
                (wq->flags == WQ_PLUGGED ? 'P' : ' '),
-               (wq->runs_since_clear >= wq->spec.flood ? 'F' : ' '),
                listcount (wq->items),
-               wq->spec.delay, wq->spec.hold,
+               wq->spec.hold,
                wq->runs,
                wq->cycles.best, wq->cycles.granularity,
                  (wq->runs) ? 
@@ -226,7 +223,7 @@ work_queue_unplug (struct work_queue *wq)
   wq->flags = WQ_UNPLUGGED;
 
   /* if thread isnt already waiting, add one */
-  work_queue_schedule (wq, wq->spec.delay);
+  work_queue_schedule (wq, wq->spec.hold);
 }
 
 /* timer thread to process a work queue
@@ -370,19 +367,9 @@ stats:
   
   /* Is the queue done yet? If it is, call the completion callback. */
   if (listcount (wq->items) > 0)
-    {
-      if (++(wq->runs_since_clear) < wq->spec.flood)
-        work_queue_schedule (wq, wq->spec.hold);
-      else
-        work_queue_schedule (wq, 0); /* queue flooded, go into overdrive */
-    }
-  else
-    {
-      wq->runs_since_clear = 0;
-      
-      if (wq->spec.completion_func)
-        wq->spec.completion_func (wq);
-    }
+    work_queue_schedule (wq, 0);
+  else if (wq->spec.completion_func)
+    wq->spec.completion_func (wq);
   
   return 0;
 }
diff --git a/lib/workqueue.h b/lib/workqueue.h
index 0a398ded3..c06f481fe 100644
--- a/lib/workqueue.h
+++ b/lib/workqueue.h
@@ -24,10 +24,8 @@
 #ifndef _QUAGGA_WORK_QUEUE_H
 #define _QUAGGA_WORK_QUEUE_H
 
-/* Work queue default hold and cycle times - millisec */
-#define WORK_QUEUE_DEFAULT_HOLD  50  /* hold-time between runs of a queue */
-#define WORK_QUEUE_DEFAULT_DELAY 10  /* minimum delay for queue runs */
-#define WORK_QUEUE_DEFAULT_FLOOD 40   /* flood factor, ~2s with prev values */
+/* Hold time for the initial schedule of a queue run, in  millisec */
+#define WORK_QUEUE_DEFAULT_HOLD  50 
 
 /* action value, for use by item processor and item error handlers */
 typedef enum
@@ -90,25 +88,11 @@ struct work_queue
     unsigned int max_retries;	
 
     unsigned int hold;	/* hold time for first run, in ms */
-    unsigned int delay; /* min delay between queue runs, in ms */
-    
-    unsigned int flood; /* number of queue runs after which we consider
-                         * queue to be flooded, where the runs are
-                         * consecutive and each has used its full slot,
-                         * and the queue has still not been cleared. If
-                         * the queue is flooded, then we try harder to
-                         * clear it by ignoring the hold and delay
-                         * times. No point sparing CPU resources just
-                         * to use ever more memory resources.
-                         */
   } spec;
   
   /* remaining fields should be opaque to users */
   struct list *items;                 /* queue item list */
   unsigned long runs;                 /* runs count */
-  unsigned int runs_since_clear;      /* number of runs since queue was
-                                       * last cleared
-                                       */
   
   struct {
     unsigned int best;