X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=lib%2Fringbuffer%2Fbackend_internal.h;h=fc5bec535c591b3d9487e555c0dbbbf2055f5dc9;hb=d723e9056812fdee222f1156f45f7a43393c5863;hp=16001776f6ebcc4b9477c427a868509b9bc5c387;hpb=d87a9f0376535ea0ab125f2f0cfc6ce6e325c0c1;p=lttng-modules.git

diff --git a/lib/ringbuffer/backend_internal.h b/lib/ringbuffer/backend_internal.h
index 16001776..fc5bec53 100644
--- a/lib/ringbuffer/backend_internal.h
+++ b/lib/ringbuffer/backend_internal.h
@@ -201,6 +201,11 @@ int subbuffer_id_check_index(const struct lib_ring_buffer_config *config,
 		return 0;
 }
 
+/*
+ * The ring buffer can count events recorded and overwritten per buffer,
+ * but it is disabled by default due to its performance overhead.
+ */
+#ifdef LTTNG_RING_BUFFER_COUNT_EVENTS
 static inline
 void subbuffer_count_record(const struct lib_ring_buffer_config *config,
 			    struct lib_ring_buffer_backend *bufb,
@@ -211,6 +216,14 @@ void subbuffer_count_record(const struct lib_ring_buffer_config *config,
 	sb_bindex = subbuffer_id_get_index(config, bufb->buf_wsb[idx].id);
 	v_inc(config, &bufb->array[sb_bindex]->records_commit);
 }
+#else /* LTTNG_RING_BUFFER_COUNT_EVENTS */
+static inline
+void subbuffer_count_record(const struct lib_ring_buffer_config *config,
+			    struct lib_ring_buffer_backend *bufb,
+			    unsigned long idx)
+{
+}
+#endif /* #else LTTNG_RING_BUFFER_COUNT_EVENTS */
 
 /*
  * Reader has exclusive subbuffer access for record consumption. No need to