From: d032747 <michael.trapp@xxxxxxx>
Short running applications with a few UUID request don't need
a large cache. Therefore increment the cache size over runtime.
---
libuuid/src/gen_uuid.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/libuuid/src/gen_uuid.c b/libuuid/src/gen_uuid.c
index 76d5371ea..805b40d90 100644
--- a/libuuid/src/gen_uuid.c
+++ b/libuuid/src/gen_uuid.c
@@ -443,6 +443,7 @@ int __uuid_generate_time(uuid_t out, int *num)
static int uuid_generate_time_generic(uuid_t out) {
#ifdef HAVE_TLS
THREAD_LOCAL int num = 0;
+ THREAD_LOCAL int cache_size = 1;
THREAD_LOCAL struct uuid uu;
THREAD_LOCAL time_t last_time = 0;
time_t now;
@@ -453,7 +454,15 @@ static int uuid_generate_time_generic(uuid_t out) {
num = 0;
}
if (num <= 0) {
- num = 1000000;
+ /*
+ * num + OP_BULK provides a local cache in each application.
+ * Start with a small cache size to cover short running applications
+ * and increment the cache size over the runntime.
+ */
+ if (cache_size < 1000000)
+ cache_size *= 10;
+ num = cache_size;
+
if (get_uuid_via_daemon(UUIDD_OP_BULK_TIME_UUID,
out, &num) == 0) {
last_time = time(NULL);
--
2.32.0 (Apple Git-132)
