VxWorks

When do I need to send TypeCode or TypeObject?

Note: Applies to Connext DDS 5.x and above Sending TypeCode/TypeObject on the wire provides convenience over specifying the type via XML configuration, but has the disadvantage that more data must be sent during endpoint discovery. This can cause network congestion problems when the TypeCode/ ...
grayson
Thu, 03/14/2019 - 11:48
4805 reads — 0 comments

What causes this error: "PRESParticipant_checkTransportInfoMatching:Warning: discovered remote participant 'yyyyy' using the 'shmem' transport with class ID 2"

Note: Applies to RTI Connext 5.2.0 and above. The following error: PRESParticipant_checkTransportInfoMatching:Warning: discovered remote participant 'yyyyy' using the 'shmem' transport with class ID 2. This class ID does not match the class ID 16777216 of the same transport in the local participant ...
belen
Wed, 03/25/2015 - 10:05
46119 reads — 7 comments

On VxWorks, an RTP application can not discover a kernel application over shared memory

When running two applications on the same WindRiver VxWorks target, one in kernel mode and the other in RTP mode, the two applications will not discover each other when using out of box settings in RTI Connext. The reason this occurs has to do with how RTI Connext internally marks the individual ...
bobby
Fri, 04/04/2014 - 14:05
5012 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
5351 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
23601 reads — 0 comments

How do I tune the SENS/TORNADO 2.0 Network Stack?

SENS/TORNADO 2.0 NETWORK STACK CONFIGURATION/PERFORMANCE ISSUES -------------------------------- 1. INTRODUCTION 1.1 NETWORK STACK VERSIONS 1.2 NET POOLS 1.2.1 CLUSTERS 1.2.2 CLUSTER BLOCKS 1.2.3 MBLOCKS 1.3 RECEIVING: DATA FLOW FROM DRIVER TO APPLICATION LEVEL 1.4 SENDING: DATA FLOW FROM ...
waffletchnlgy
Thu, 01/17/2013 - 12:35
10210 reads — 0 comments

How do I eliminate the long startup delay on some VxWorks targets with no file system?

Note: Applies to RTI Connext 4.x and above. RTI Connext calls fopen() to load the default XML and NDDS_DISCOVERY_PEERS files if they exist. On some VxWorks targets that either have no file system or use NFS, FTP, or some other network-based file system, and the file system is not mounted, RTI ...
ken
Thu, 01/17/2013 - 12:10
4576 reads — 0 comments

Why do UDP latencies spike?

As described in TCP/IP Illustrated, Volume 1, by W. Richard Stevens, Section 11.9 , ARP entries that expire may introduce high latencies on the next send. Entry expiration details are system-dependent; for instance, a packet sent to a particular address may refresh the timeout. On a VxWorks target ...
dstockdill
Thu, 01/17/2013 - 12:02
4695 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
6879 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
4379 reads — 0 comments

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