X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=lib%2Fringbuffer%2Ffrontend_types.h;fp=lib%2Fringbuffer%2Ffrontend_types.h;h=ac3fa90273545312cd6f93bf5100ae48ca81afd8;hb=a1817dcb28265d0f8db10c6bbe98fe8db2c53a8a;hp=50b33ac11c85f70856b8dc4f38810df02d346fe9;hpb=2230bf699820d6cc70492353600fcca409ea366c;p=lttng-modules.git

diff --git a/lib/ringbuffer/frontend_types.h b/lib/ringbuffer/frontend_types.h
index 50b33ac1..ac3fa902 100644
--- a/lib/ringbuffer/frontend_types.h
+++ b/lib/ringbuffer/frontend_types.h
@@ -137,6 +137,20 @@ struct lib_ring_buffer {
 
 	struct commit_counters_cold *commit_cold;
 					/* Commit count per sub-buffer */
+	u64 *ts_end;			/*
+					 * timestamp_end per sub-buffer.
+					 * Time is sampled by the
+					 * switch_*_end() callbacks which
+					 * are the last space reservation
+					 * performed in the sub-buffer
+					 * before it can be fully
+					 * committed and delivered. This
+					 * time value is then read by
+					 * the deliver callback,
+					 * performed by the last commit
+					 * before the buffer becomes
+					 * readable.
+					 */
 	atomic_long_t active_readers;	/*
 					 * Active readers count
 					 * standard atomic access (shared)