Index: kern/subr_taskqueue.c
===================================================================
RCS file: /home/ncvs/src/sys/kern/subr_taskqueue.c,v
retrieving revision 1.21
diff -u -r1.21 subr_taskqueue.c
--- kern/subr_taskqueue.c	17 Dec 2003 21:13:04 -0000	1.21
+++ kern/subr_taskqueue.c	15 Jan 2004 20:10:29 -0000
@@ -36,9 +36,16 @@
 #include <sys/lock.h>
 #include <sys/malloc.h>
 #include <sys/mutex.h>
+#include <sys/sysctl.h>
 #include <sys/taskqueue.h>
+#include <sys/time.h>
 #include <sys/unistd.h>
 
+int tq_in;
+SYSCTL_INT(_kern, OID_AUTO, tq_in, CTLFLAG_RD, &tq_in, 0, "");
+int tq_out;
+SYSCTL_INT(_kern, OID_AUTO, tq_out, CTLFLAG_RD, &tq_out, 0, "");
+
 static MALLOC_DEFINE(M_TASKQUEUE, "taskqueue", "Task Queues");
 static void	*taskqueue_giant_ih;
 static void	*taskqueue_ih;
@@ -157,6 +164,9 @@
 		return 0;
 	}
 
+	getnanotime(&task->ta_queuetime);
+	tq_in++;
+
 	/*
 	 * Optimise the case when all tasks have the same priority.
 	 */
@@ -189,6 +199,7 @@
 taskqueue_run(struct taskqueue *queue)
 {
 	struct task *task;
+	struct timespec tv;
 	int pending;
 
 	mtx_lock(&queue->tq_mutex);
@@ -201,8 +212,16 @@
 		STAILQ_REMOVE_HEAD(&queue->tq_queue, ta_link);
 		pending = task->ta_pending;
 		task->ta_pending = 0;
+		tq_out++;
 		mtx_unlock(&queue->tq_mutex);
 
+		getnanotime(&tv);
+		timespecsub(&tv, &task->ta_queuetime);
+		if (tv.tv_sec >= 1) {
+			printf("taskqueue_run: warning, queue time of %d.%09ld "
+			    "for context %p\n", tv.tv_sec, tv.tv_nsec,
+			    task->ta_func);
+		}
 		task->ta_func(task->ta_context, pending);
 
 		mtx_lock(&queue->tq_mutex);
Index: sys/_task.h
===================================================================
RCS file: /home/ncvs/src/sys/sys/_task.h,v
retrieving revision 1.1
diff -u -r1.1 _task.h
--- sys/_task.h	23 Jan 2004 20:44:26 -0000	1.1
+++ sys/_task.h	25 Jan 2004 02:42:01 -0000
@@ -34,6 +34,7 @@
 #endif
 
 #include <sys/queue.h>
+#include <sys/_timespec.h>
 
 /*
  * Each task includes a function which is called from
@@ -49,6 +50,7 @@
 	int	ta_priority;		/* priority of task in queue */
 	task_fn_t *ta_func;		/* task handler */
 	void	*ta_context;		/* argument for handler */
+	struct timespec ta_queuetime;	/* time enqueued */
 };
 
 #endif /* !_SYS__TASK_H_ */