Some small enhancements to thread and workqueue libraries in zebra:

- Allow work queues to specify the yield duration for corresponding background thread
- Support using specified yield duration in thread yielding
- During work queue processing, if using a single list element with a meta-queue
  (like done in Zebra), do not exit after each element is processed, instead
  update the next-node upon a WQ_REQUEUE so that the WQ processing continues
  and is terminated by the yield logic.
- Enhance work queue debug output

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/thread.h b/lib/thread.h
index bc7eaef447..f47dc92350 100644
--- a/lib/thread.h
+++ b/lib/thread.h
@@ -85,6 +85,7 @@ struct thread
   int index;			/* used for timers to store position in queue */
   struct timeval real;
   struct cpu_thread_history *hist; /* cache pointer to cpu_history */
+  unsigned long yield; /* yield time in us */
   char funcname[FUNCNAME_LEN];
 };
 
@@ -209,6 +210,8 @@ extern void thread_call (struct thread *);
 extern unsigned long thread_timer_remain_second (struct thread *);
 extern int thread_should_yield (struct thread *);
 extern unsigned long timeval_elapsed (struct timeval a, struct timeval b);
+/* set yield time for thread */
+extern void thread_set_yield_time (struct thread *, unsigned long);
 
 /* Internal libzebra exports */
 extern void thread_getrusage (RUSAGE_T *);