Turn off GSN-EDF TRACE() spam by default.

Having GSN-EDF log so many things each tick is useful
when tracking down race conditions, but it also makes
it really hard to find anything else. Thus, turn it off by
default but leave it in for future debugging fun.

1 files changed, 13 insertions, 1 deletions

diff --git a/litmus/sched_gsn_edf.c b/litmus/sched_gsn_edf.c
index 9f256be86cf7..2a0ee50d26a2 100644
--- a/litmus/sched_gsn_edf.c
+++ b/litmus/sched_gsn_edf.c
@@ -118,6 +118,11 @@ static rt_domain_t gsnedf;
 #define gsnedf_lock (gsnedf.ready_lock)
 
 
+/* Uncomment this if you want to see all scheduling decisions in the
+ * TRACE() log.
+#define WANT_ALL_SCHED_EVENTS
+ */
+
 static int cpu_lower_prio(struct bheap_node *_a, struct bheap_node *_b)
 {
         cpu_entry_t *a, *b;
@@ -196,10 +201,12 @@ static noinline void link_task_to_cpu(struct task_struct* linked,
                         linked->rt_param.linked_on = entry->cpu;
         }
         entry->linked = linked;
+#ifdef WANT_ALL_SCHED_EVENTS
         if (linked)
                 TRACE_TASK(linked, "linked to %d.\n", entry->cpu);
         else
                 TRACE("NULL linked to %d.\n", entry->cpu);
+#endif
         update_cpu_position(entry);
 }
 
@@ -415,7 +422,9 @@ static struct task_struct* gsnedf_schedule(struct task_struct * prev)
         sleep       = exists && get_rt_flags(entry->scheduled) == RT_F_SLEEP;
         preempt     = entry->scheduled != entry->linked;
 
+#ifdef WANT_ALL_SCHED_EVENTS
         TRACE_TASK(prev, "invoked gsnedf_schedule.\n");
+#endif
 
         if (exists)
                 TRACE_TASK(prev,
@@ -480,13 +489,14 @@ static struct task_struct* gsnedf_schedule(struct task_struct * prev)
 
         spin_unlock(&gsnedf_lock);
 
+#ifdef WANT_ALL_SCHED_EVENTS
         TRACE("gsnedf_lock released, next=0x%p\n", next);
 
-
         if (next)
                 TRACE_TASK(next, "scheduled at %llu\n", litmus_clock());
         else if (exists && !next)
                 TRACE("becomes idle at %llu.\n", litmus_clock());
+#endif
 
 
         return next;
@@ -500,7 +510,9 @@ static void gsnedf_finish_switch(struct task_struct *prev)
         cpu_entry_t*    entry = &__get_cpu_var(gsnedf_cpu_entries);
 
         entry->scheduled = is_realtime(current) ? current : NULL;
+#ifdef WANT_ALL_SCHED_EVENTS
         TRACE_TASK(prev, "switched away from\n");
+#endif
 }