Merge branch 'overflow-queue-warn' into 'master'

[AbstractWorkStealingScheduler] Emit warning if overflow queue is used

See merge request !365

emper/strategies/AbstractWorkStealingScheduler.cpp

@@ -58,6 +58,11 @@ void AbstractWorkStealingScheduler::scheduleViaWorkStealing(Fiber& fiber) {
 			enqueueInAnywhereQueue(fiber);
 
 			emper::statsIncr(awss::stats.scheduledFibersToOverflowQueue);
+
+			if (!queueFullWarningEmitted) [[unlikely]] {
+				queueFullWarningEmitted = true;
+				LOGW("Work-stealing scheduling queues full: overflow queue used!");
+			}
 		} else {
 			ABORT("Could not push fiber " << &fiber << " into queue");
 		}