NDDS

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
24837 reads — 0 comments

How do I transition my NDDS 3.x application to RTI Connext 4.x and above?

Note: Applies to NDDS 3.x and RTI Connext 4.x and above First, it is important to point out that NDDS 3.x and RTI Connext 4.x and above are not wire-protocol compatible. Applications built with these 2 products cannot communicate with each other. Second, although the object models of both products ...
yusheng
Thu, 01/17/2013 - 12:40
3498 reads — 0 comments

Why do I get an inconsistent QoS error when recompiling my 4.1e application for 4.2e?

One of the more common reasons is due to the parameter late_joiner_heartbeat_period (part of DDS_RtpsReliableWriterProtocol_t , used in the DataWriterProtocolQosPolicy and DisoveryConfigQosPolicy ) which is new in RTI Data Distribution Service 4.2. late_joiner_heartbeat_period is used when a ...
gianpiero
Thu, 01/17/2013 - 12:03
4598 reads — 0 comments

How can I improve my throughput performance on Linux?

One potential cause of poor performance on a Linux system is the amount of buffer space the RHEL 4u4 kernel uses to reassemble IP fragments. The parameters in /proc/sys/net/ipv4 control various aspects of the network, including a parameter that controlls the reassembly buffer size. ...
gianpiero
Thu, 01/17/2013 - 11:47
17146 reads — 0 comments

How do I resolve a problem with VxWorks buffers?

Note: Applies to NDDS 3.x and earlier, RTI Data Distribution Service 4.0 and 4.1 To monitor the state of the data buffer usage inside the stack, you can use the netStackDataPoolShow or mbufShow functions. Both commands give the same information. If the stack has been running out of clusters, these ...
dstockdill
Thu, 01/17/2013 - 11:27
7617 reads — 0 comments

How do I use the RtiNtpTime structure?

Note: Applies to NDDS 3.x. NDDS's internal time representation is in NTP format rather than DDS_Time for computational efficiency reasons. The header osapi/osapi_ntptime.h defines NTP time class ( struct RTINtpTime ) as well as its manipulation methods. A brief excerpt from this header file is ...
gianpiero
Thu, 01/17/2013 - 11:26
3404 reads — 0 comments

What are "heartbearts" and how are they used in RTI Data Distribution Service 3.x?

Note : The following discussion applies to RTI Data Distribution Service 3.x only. (There is a separate FAQ for 4.x.) Heartbeats (HBs) are sent for one of two reasons: Every SendQueueSize / HeartBeatsPerSendQueue issues, RTI Data Distribution Service will append a HB to the issue to request that it ...
Juanjo Martin
Thu, 01/17/2013 - 08:44
3551 reads — 0 comments

How do I limit NIC usage for multicast in NDDS 3.1a?

Note: Applies to NDDS 3.x For machines with multiple NICs, it is sometimes useful to specify which NIC(s) to communicate over. Multicast packets will be sent through all interfaces that satisfy the following criteria: It is enabled for multicast NDDS is configured to use it Enabling a NIC for ...
sara
Thu, 01/17/2013 - 08:17
4079 reads — 0 comments

Is NDDS 3.x compatible with RTI Connext 4.x or above?

Note : Applies to NDDS 3.x and RTI Connext 4.x and above. NDDS 3.x and RTI Connext 4.x (and above) are not wire-protocol compatible. Applications built with these 2 products cannot communicate with each other. The attached 3.x to 4.0 Transition Guide will help you move your application to the 4.0 ...
Juanjo Martin
Thu, 01/17/2013 - 08:15
2707 reads — 0 comments

Common NDDS Errors Seen on VxWorks Systems and Their Meanings

Note : Applies to RTI NDDS 2.x and earlier, and NDDS 3.x. This Solution describes errors you may see when running an NDDS application on VxWorks 5.4.x or 5.5.x. These error messages most likely mean that the amount and/or sizing of your stack buffers are incorrect. NDDS is unable to send "NDDS ...
juan
Thu, 01/17/2013 - 08:11
4871 reads — 0 comments

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