Index: kern/subr_taskqueue.c
===================================================================
RCS file: /home/ncvs/src/sys/kern/subr_taskqueue.c,v
retrieving revision 1.25
diff -u -r1.25 subr_taskqueue.c
--- kern/subr_taskqueue.c	5 Oct 2004 04:16:00 -0000	1.25
+++ kern/subr_taskqueue.c	23 Oct 2004 19:18:26 -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;
@@ -140,6 +147,9 @@
 		return 0;
 	}
 
+	getnanotime(&task->ta_queuetime);
+	tq_in++;
+
 	/*
 	 * Optimise the case when all tasks have the same priority.
 	 */
@@ -172,6 +182,7 @@
 taskqueue_run(struct taskqueue *queue)
 {
 	struct task *task;
+	struct timespec tv;
 	int owned, pending;
 
 	owned = mtx_owned(&queue->tq_mutex);
@@ -187,8 +198,16 @@
 		pending = task->ta_pending;
 		task->ta_pending = 0;
 		task->ta_flags |= TAF_PENDING;
+		tq_out++;
 		mtx_unlock(&queue->tq_mutex);
 
+		getnanotime(&tv);
+		timespecsub(&tv, &task->ta_queuetime);
+		if (tv.tv_nsec >= 0500000000) {
+			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 1.3
diff -u -r1.3 _task.h
--- sys/_task.h	5 Oct 2004 04:16:01 -0000	1.3
+++ sys/_task.h	23 Oct 2004 19:38:16 -0000
@@ -46,6 +46,7 @@
 	task_fn_t *ta_func;		/* task handler */
 	void	*ta_context;		/* argument for handler */
 	int	ta_flags;		/* Flags */
+	struct timespec ta_queuetime;	/* time enqueued */
 };
 
 #define TAF_PENDING	0x1		/* Task is being run now */