Solutions

What causes this error: "NDDS_Transport_UDPv4_receive_rEA:!precondition: buffer_in->length < (self)->property->message_size_max"

The following error: NDDS_Transport_UDPv4_receive_rEA:!precondition: buffer_in->length < (self)->property->message_size_max is caused when the buffer size of the Receiver Pool is less than the message_size_max of a builtin transport (UDPv4 in this case). To fix this issue, all you need ...
Juanjo Martin
Tue, 02/12/2013 - 01:58
6745 reads — 0 comments

What causes this error: "incompatible shared memory protocol detected."

Note: Applies to RTI Connext 4.x and above. The following error: [D0004|CREATE Participant|D0004|ENABLE] NDDS_Transport_Shmem_is_segment_compatible:incompatible shared memory protocol detected. Current version 1.0 not compatible with 2.0. is caused when two applications, one using RTI Connext DDS 4 ...
bobby
Wed, 02/06/2013 - 14:05
5373 reads — 0 comments

How do I separate the transport used for discovery data from the transport used for user data?

Note: Applies to RTI Connext version 4.x and above OMG Data Distribution Service (DDS) applications send two types of data: meta data used for discovery and user data. Because the core of RTI Connext DDS is transport agnostic, it does not make any assumptions about the actual transports used to ...
erin
Fri, 02/01/2013 - 17:18
5416 reads — 0 comments

Why shouldn't I use DDS_String_dup() to initialize string data?

Note: This solution applies to RTI Data Distribution Service 4.x. The description in this FAQ only applies to data instances that are allocated with FooTypeSupport::create_data(), which pre-allocates the strings. (It does not apply to situations in which the data instance is allocated on the stack ...
Victor
Wed, 01/30/2013 - 17:09
12807 reads — 0 comments

What should I consider when testing RTI Connext performance on Gig-E/Infiniband networks?

Performance is a function of how well hardware and software components work together with the middleware. The relationship is certainly not easily predictable. With very fast hardware, the limitation seems to be the hardware bus speed. The PCI just cannot keep up and this leads to high CPU ...
aida
Fri, 01/18/2013 - 03:32
3264 reads — 0 comments

How do I tune the network buffering in VxWorks 5.4?

Note: Applies to NDDS 3.0 and VxWorks 5.4. Introduction The VxWorks TCP/IP stack uses a fixed amount of buffers. The buffers and their sizes are configured in the kernel. This is different from non real-time OSs, where the buffers can be taken as needed from main memory. In many NDDS applications ...
abhi
Thu, 01/17/2013 - 13:22
23639 reads — 0 comments

Example Code - Aggregation

Note: Applies to RTI Data Distribution Service 4.1, 4.2; While the design pattern also works for RTI Data Distribution Service 4.3 and above, its batching feature is a better way to achieve aggregation. Purpose Publisher This example shows how to create an application that aggregates data. This ...
erin
Thu, 01/17/2013 - 13:15
4463 reads — 0 comments

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