Scalability fix for many events: event hash table size

Increase number of buckets for event hash table (per session) from 64 to
4096. This improves process startup time for J9 vm (with 16k
tracepoints) very significantly.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/include/lttng/ust-events.h b/include/lttng/ust-events.h
index 2a5656b5ba404cdf523b5740af301793f05338bd..b5d758500af19382249bb23f60404a9bc8b96f86 100644 (file)
--- a/include/lttng/ust-events.h
+++ b/include/lttng/ust-events.h
@@ -440,7 +440,7 @@ struct lttng_channel {
        unsigned char uuid[LTTNG_UST_UUID_LEN]; /* Trace session unique ID */
 };
 
-#define LTTNG_UST_EVENT_HT_BITS                6
+#define LTTNG_UST_EVENT_HT_BITS                12
 #define LTTNG_UST_EVENT_HT_SIZE                (1U << LTTNG_UST_EVENT_HT_BITS)
 
 struct lttng_ust_event_ht {