Modify default kernel channel size/number

[lttng-tools.git] / include / lttng-share.h

diff --git a/include/lttng-share.h b/include/lttng-share.h
index 9d3a259a6160b883f556137da29a5ae54fc325d8..d076ef3ade5d172d2ef63b9f34168e2b2701a817 100644 (file)
--- a/include/lttng-share.h
+++ b/include/lttng-share.h
@@ -28,20 +28,30 @@ typedef uint64_t u64;
 typedef __s64 s64;
 
 /* Default channel attributes */
-#define DEFAULT_CHANNEL_NAME                "channel0"
-#define DEFAULT_CHANNEL_OVERWRITE           0       /* usec */
+#define DEFAULT_CHANNEL_NAME                   "channel0"
+#define DEFAULT_CHANNEL_OVERWRITE              0       /* usec */
 /* DEFAULT_CHANNEL_SUBBUF_SIZE must always be a power of 2 */
-#define DEFAULT_CHANNEL_SUBBUF_SIZE         4096    /* bytes */
+#define DEFAULT_CHANNEL_SUBBUF_SIZE            4096    /* bytes */
 /* DEFAULT_CHANNEL_SUBBUF_NUM must always be a power of 2 */
-#define DEFAULT_CHANNEL_SUBBUF_NUM          8
-#define DEFAULT_CHANNEL_SWITCH_TIMER        0       /* usec */
-#define DEFAULT_CHANNEL_READ_TIMER          200     /* usec */
-/* See lttng-kernel.h enum lttng_kernel_output for channel output */
-#define DEFAULT_KERNEL_CHANNEL_OUTPUT       LTTNG_EVENT_SPLICE
+#define DEFAULT_CHANNEL_SUBBUF_NUM             8
+#define DEFAULT_CHANNEL_SWITCH_TIMER           0       /* usec */
+#define DEFAULT_CHANNEL_READ_TIMER             200     /* usec */
+#define DEFAULT_CHANNEL_OUTPUT                 LTTNG_EVENT_MMAP
+
+#define DEFAULT_METADATA_SUBBUF_SIZE           4096
+#define DEFAULT_METADATA_SUBBUF_NUM            8
+//TODO: keeping value to 8 currently because consumer is only spawned after
+//start, so it cannot empty the metadata buffer at trace start.
+//#define DEFAULT_METADATA_SUBBUF_NUM          2
 
-/* == NOT IMPLEMENTED ==
-#define DEFAULT_UST_CHANNEL_OUTPUT          LTTNG_UST_MMAP
-*/
+/* Kernel has different defaults */
+
+/* DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE must always be a power of 2 */
+#define DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE     262144    /* bytes */
+/* DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM must always be a power of 2 */
+#define DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM      4
+/* See lttng-kernel.h enum lttng_kernel_output for channel output */
+#define DEFAULT_KERNEL_CHANNEL_OUTPUT          LTTNG_EVENT_SPLICE
 
 /*
  * lttng user-space instrumentation type