Changeset 1378

Timestamp:

Jun 20, 2007 4:34:56 AM (17 years ago)

Author:

bennylp

Message:

Ticket #335: Detect timestamp jump to avoid excessive CPU usage in master clock (thanks ChenHuan?)

File:

• pjproject/trunk/pjmedia/src/pjmedia/clock_thread.c (modified) (3 diffs)

pjproject/trunk/pjmedia/src/pjmedia/clock_thread.c

@@ -28 +28 @@
  * Implementation of media clock with OS thread.
  */
-
+#define MAX_JUMP    500
 
 struct pjmedia_clock
@@ -185 +185 @@
 
     /* Calculate next tick */
+    if (clock->next_tick.u64+MAX_JUMP < now.u64) {
+        /* Timestamp has made large jump, adjust next_tick */
+        clock->next_tick.u64 = now.u64;
+    }
     clock->next_tick.u64 += clock->interval.u64;
 
@@ -230 +234 @@
 
         /* Calculate next tick */
+        if (clock->next_tick.u64+MAX_JUMP < now.u64) {
+            /* Timestamp has made large jump, adjust next_tick */
+            clock->next_tick.u64 = now.u64;
+        }
         clock->next_tick.u64 += clock->interval.u64;