diff --git a/include/proto/activity.h b/include/proto/activity.h
index 4cf9c8d..717d667 100644
--- a/include/proto/activity.h
+++ b/include/proto/activity.h
@@ -26,6 +26,7 @@
 #include <common/hathreads.h>
 #include <common/time.h>
 #include <types/activity.h>
+#include <proto/freq_ctr.h>
 
 extern struct activity activity[MAX_THREADS];
 
@@ -34,12 +35,15 @@
 
 /* Collect date and time information before calling poll(). This will be used
  * to count the run time of the past loop and the sleep time of the next poll.
+ * It also makes use of the just updated before_poll timer to count the loop's
+ * run time and feed the average loop time metric (in microseconds).
  */
 static inline void activity_count_runtime()
 {
 	uint64_t new_mono_time;
 	uint64_t new_cpu_time;
 	int64_t stolen;
+	uint32_t run_time;
 
 	new_cpu_time   = now_cpu_time();
 	new_mono_time  = now_mono_time();
@@ -56,6 +60,9 @@
 			report_stolen_time(stolen);
 		}
 	}
+
+	run_time = (before_poll.tv_sec - after_poll.tv_sec) * 1000000U + (before_poll.tv_usec - after_poll.tv_usec);
+	swrate_add(&activity[tid].avg_loop_us, TIME_STATS_SAMPLES, run_time);
 }
 
 
diff --git a/include/types/activity.h b/include/types/activity.h
index 99922b4..f58d759 100644
--- a/include/types/activity.h
+++ b/include/types/activity.h
@@ -47,8 +47,10 @@
 	unsigned int empty_rq;     // calls to process_runnable_tasks() with nothing for the thread
 	unsigned int long_rq;      // process_runnable_tasks() left with tasks in the run queue
 	unsigned int cpust_total;  // sum of half-ms stolen per thread
+	/* one cache line */
 	struct freq_ctr cpust_1s;  // avg amount of half-ms stolen over last second
 	struct freq_ctr_period cpust_15s; // avg amount of half-ms stolen over last 15s
+	unsigned int avg_loop_us;  // average run time per loop over last 1024 runs
 	char __pad[0]; // unused except to check remaining room
 	char __end[0] __attribute__((aligned(64))); // align size to 64.
 };