From: compudj <compudj@04897980-b3bd-0310-b5e0-8ef037075253>
Date: Thu, 16 Oct 2008 14:40:01 +0000 (+0000)
Subject: update comment
X-Git-Tag: v0.12.20~375
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=e0c7c4004c56c9ad749889225f9b53aedc01fb30;p=lttv.git

update comment

git-svn-id: http://ltt.polymtl.ca/svn@3114 04897980-b3bd-0310-b5e0-8ef037075253
---

diff --git a/trunk/lttv/ltt/tracefile.c b/trunk/lttv/ltt/tracefile.c
index 2f530acc..1d411e3e 100644
--- a/trunk/lttv/ltt/tracefile.c
+++ b/trunk/lttv/ltt/tracefile.c
@@ -772,7 +772,13 @@ LttTrace *ltt_trace_open(const gchar *pathname)
     goto metadata_error;
   }
 
-  /* Get the trace information for the control/metadata_0 tracefile */
+  /*
+   * Get the trace information for the control/metadata_0 tracefile.
+   * Getting a correct trace start_time and start_tsc is insured by the fact
+   * that no subbuffers are supposed to be lost in the metadata channel.
+   * Therefore, the first subbuffer contains the start_tsc timestamp in its
+   * buffer header.
+   */
   g_assert(group->len > 0);
   tf = &g_array_index (group, LttTracefile, 0);
   header = (ltt_subbuffer_header_t *)tf->buffer.head;