X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=lib%2Fringbuffer%2Ffrontend_types.h;h=0d340afb50b3de8f32b9519823fe817ac2c242a2;hb=e52cf96bf27fc36ac5150e4d52cd4caffdbe3a97;hp=2b0c93291429d6139dffdeda7490bf1b62715e8d;hpb=9f36eaed6f91d5897924b551b44d1edd8cee00e2;p=lttng-modules.git

diff --git a/lib/ringbuffer/frontend_types.h b/lib/ringbuffer/frontend_types.h
index 2b0c9329..0d340afb 100644
--- a/lib/ringbuffer/frontend_types.h
+++ b/lib/ringbuffer/frontend_types.h
@@ -15,7 +15,6 @@
 #include <linux/kref.h>
 #include <wrapper/ringbuffer/config.h>
 #include <wrapper/ringbuffer/backend_types.h>
-#include <wrapper/spinlock.h>
 #include <lib/prio_heap/lttng_prio_heap.h>	/* For per-CPU read-side iterator */
 #include <lttng-cpuhotplug.h>
 
@@ -121,6 +120,20 @@ 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)