Explain limitations if packet header fields are not present
authorMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Wed, 4 May 2011 19:58:12 +0000 (15:58 -0400)
committerMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Wed, 4 May 2011 19:58:12 +0000 (15:58 -0400)
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
common-trace-format-proposal.txt

index f2f7e232b4b7b0a23513a74ac24490b8286664ce..8182ea991f7da92d49b2a35e193ec91213d62762 100644 (file)
@@ -597,6 +597,17 @@ trace {
   packet.header := struct event_packet_header;
 };
 
+If a packet header lacks the "magic" number field, the trace endianness
+needs to be specified in the trace "endian" metadata attribute.
+
+If the trace_uuid is not present, no validation that the metadata
+actually corresponds to the stream is performed.
+
+If the stream_id packet header field is missing, the trace can only
+contain a single stream. Its "id" field can be left out, and its events
+don't need to declare a "stream_id" field.
+
+
 5.2 Event Packet Context Description
 
 Event packet context example. These are declared within the stream declaration
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