X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=libringbuffer%2Ffrontend_types.h;h=d0890408eb9bfa4965fda6f1326d00693530a6d8;hb=74e4d0d1536ebc5b3ba01dabcdea468614ced6f7;hp=629abcbd5b4186592176f2609b03d4820a56b7b8;hpb=c9b22e40b850709413adb7a61380115d6e616a10;p=lttng-ust.git

diff --git a/libringbuffer/frontend_types.h b/libringbuffer/frontend_types.h
index 629abcbd..d0890408 100644
--- a/libringbuffer/frontend_types.h
+++ b/libringbuffer/frontend_types.h
@@ -202,6 +202,20 @@ struct lttng_ust_lib_ring_buffer {
 
 	DECLARE_SHMP(struct commit_counters_cold, commit_cold);
 					/* Commit count per sub-buffer */
+	DECLARE_SHMP(uint64_t, 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.
+					 */
 	long active_readers;		/*
 					 * Active readers count
 					 * standard atomic access (shared)