add perf test driver

[nbds] / runtime / lwt.c

diff --git a/runtime/lwt.c b/runtime/lwt.c
index 39041759e0891eb3e274d410a53dc31e73eb5a51..a986567bcb05023f8e6bafb541035fe5266f9900 100644 (file)
--- a/runtime/lwt.c
+++ b/runtime/lwt.c
@@ -11,7 +11,7 @@
 #include "mem.h"
 
 #define LWT_BUFFER_SCALE 20
-#define LWT_BUFFER_SIZE (1 << LWT_BUFFER_SCALE)
+#define LWT_BUFFER_SIZE (1ULL << LWT_BUFFER_SCALE)
 #define LWT_BUFFER_MASK (LWT_BUFFER_SIZE - 1)
 
 volatile int halt_ = 0;