diff --git a/probe/main.go b/probe/main.go
index db0c24971d..40de9fdb2e 100644
--- a/probe/main.go
+++ b/probe/main.go
@@ -179,6 +179,7 @@ func main() {
 				r = report.MakeReport()
 
 			case <-spyTick:
+				start := time.Now()
 				if err := processCache.Update(); err != nil {
 					log.Printf("error reading processes: %v", err)
 				}
@@ -191,6 +192,10 @@ func main() {
 				}
 				r = Apply(r, taggers)
 
+				if elapsed := time.Now().Sub(start); elapsed > *spyInterval {
+					log.Printf("Warning: Took %s to generate report - longer than spyInterval of %s.", elapsed, *spyInterval)
+				}
+
 			case <-quit:
 				return
 			}