From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Thu, 21 Dec 2017 16:03:33 +0000 (-0500)
Subject: Add likely/unlikely annotations on channel sample handling path
X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=commitdiff_plain;h=e0b5f87b7e697508c09e8db401f40f7de296b97a

Add likely/unlikely annotations on channel sample handling path

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---

diff --git a/src/bin/lttng-sessiond/notification-thread-events.c b/src/bin/lttng-sessiond/notification-thread-events.c
index 254aa5396..87939f066 100644
--- a/src/bin/lttng-sessiond/notification-thread-events.c
+++ b/src/bin/lttng-sessiond/notification-thread-events.c
@@ -2404,7 +2404,7 @@ int handle_notification_thread_channel_sample(
 			&latest_sample.key,
 			&iter);
 	node = cds_lfht_iter_get_node(&iter);
-	if (!node) {
+	if (caa_unlikely(!node)) {
 		/*
 		 * Not an error since the consumer can push a sample to the pipe
 		 * and the rest of the session daemon could notify us of the
@@ -2433,7 +2433,7 @@ int handle_notification_thread_channel_sample(
 			&latest_sample.key,
 			&iter);
 	node = cds_lfht_iter_get_node(&iter);
-	if (node) {
+	if (caa_likely(node)) {
 		struct channel_state_sample *stored_sample;
 
 		/* Update the sample stored. */
@@ -2472,7 +2472,7 @@ int handle_notification_thread_channel_sample(
 			&latest_sample.key,
 			&iter);
 	node = cds_lfht_iter_get_node(&iter);
-	if (!node) {
+	if (caa_likely(!node)) {
 		goto end_unlock;
 	}
 
@@ -2535,7 +2535,7 @@ int handle_notification_thread_channel_sample(
 				channel_info->session_info->uid,
 				channel_info->session_info->gid);
 		lttng_evaluation_destroy(evaluation);
-		if (ret) {
+		if (caa_unlikely(ret)) {
 			goto end_unlock;
 		}
 	}