diff --git a/lib/event/app.c b/lib/event/app.c
index ca43561e37..56bd3db748 100644
--- a/lib/event/app.c
+++ b/lib/event/app.c
@@ -366,7 +366,7 @@ spdk_app_start(struct spdk_app_opts *opts, spdk_event_fn start_fn,
 
 	spdk_env_init(&env_opts);
 
-	printf("Total cores available: %d\n", spdk_env_get_core_count());
+	SPDK_NOTICELOG("Total cores available: %d\n", spdk_env_get_core_count());
 
 	/*
 	 * If mask not specified on command line or in configuration file,
diff --git a/lib/event/reactor.c b/lib/event/reactor.c
index b6052b4234..2ebb543685 100644
--- a/lib/event/reactor.c
+++ b/lib/event/reactor.c
@@ -658,7 +658,7 @@ spdk_reactors_init(unsigned int max_delay_us)
 	char mempool_name[32];
 
 	socket_mask = spdk_reactor_get_socket_mask();
-	printf("Occupied cpu socket mask is 0x%lx\n", socket_mask);
+	SPDK_NOTICELOG("Occupied cpu socket mask is 0x%lx\n", socket_mask);
 
 	for (i = 0; i < SPDK_MAX_SOCKET; i++) {
 		if ((1ULL << i) & socket_mask) {
@@ -666,7 +666,7 @@ spdk_reactors_init(unsigned int max_delay_us)
 		}
 	}
 	if (socket_count == 0) {
-		printf("No sockets occupied (internal error)\n");
+		SPDK_ERRLOG("No sockets occupied (internal error)\n");
 		return -1;
 	}