Set default number of metadata subbuffers to 2

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

diff --git a/include/lttng-share.h b/include/lttng-share.h
index d6bb0532a234d670d39cbf751777bb0736dd5793..b3495e1967f787b72c80de629ff5fb95a56c237a 100644 (file)
--- a/include/lttng-share.h
+++ b/include/lttng-share.h
@@ -3,8 +3,8 @@
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
+ * as published by the Free Software Foundation; only version 2
+ * of the License.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -27,15 +27,28 @@ typedef uint64_t u64;
 
 typedef __s64 s64;
 
-#define LTTNG_RUNDIR        "/var/run/lttng"
-
 /* Default channel attributes */
-#define DEFAULT_CHANNEL_NAME                 "channel0"
-#define DEFAULT_CHANNEL_OVERWRITE            0
-#define DEFAULT_CHANNEL_SUBBUF_SIZE          4096    /* bytes */
-#define DEFAULT_CHANNEL_SUBBUF_NUM           8       /* Must always be a power of 2 */
-#define DEFAULT_CHANNEL_SWITCH_TIMER         0       /* usec */
-#define DEFAULT_CHANNEL_READ_TIMER           200     /* 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 */
+/* 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 */
+#define DEFAULT_CHANNEL_OUTPUT                 LTTNG_EVENT_MMAP
+
+#define DEFAULT_METADATA_SUBBUF_SIZE           4096
+#define DEFAULT_METADATA_SUBBUF_NUM            2
+
+/* 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