Linux

How do I know UDP checksum is enabled on my OS?

A simple way to tell whether UDP checksum is enabled is to use Wireshark or tcpdump to display the UDP header. Look at the udp checksum field in the UDP header. If this field is 0x0000, then UDP checksum is disabled; otherwise it is enabled. For example, on a Linux machine, the following command ...
erin
Thu, 01/17/2013 - 12:40
11336 reads — 3 comments

Can I run my RTI Connext application in a virtual machine?

Yes, you can run your RTI Connext-based application on a virtual machine. Make sure that any time synchronization or jumps occur before starting your RTI Connext application. In versions 4.4b and higher, we have improved support for virtual machines by introducing a feature to specify which clock ...
abhi
Thu, 01/17/2013 - 12:22
2688 reads — 0 comments

Why can't I communicate over loopback, but can using shared memory?

NOTE: Applies to RTI Data Distribution Service 4.1 and 4.2 By default, RTI Data Distribution Service uses shared memory to communicate with other DomainParticipants on the same node and disables local traffic over the UDPv4 or UDPv6 loopback interface. So, by default, an RTI Data Distribution ...
abhi
Thu, 01/17/2013 - 12:07
5787 reads — 0 comments

Why does RTI Developer Platform fail to start on Fedora 7?

Note: FlexLM is no longer a dependency for RTI Connext 4.5e and above. Fedora 7 lacks a library required by FlexLM. RTI Developer Platform uses FlexLM. You will encounter the following error during start up of RTI Developer Platform: License Error RTI Development Platform:failure to load ...
dstringer
Thu, 01/17/2013 - 12:03
3495 reads — 0 comments

How do I create a RTI Connext Java application in Eclipse?

Note: Applies to RTI Connext 4.x and above. Start Eclipse in the Java perspective. Right-click in the white area of Package Explorer and select New, Java Project In the New Java Project dialog, for the Project name , enter: MyDDSProject Click Finish . (This creates MyDDSProject in the Package ...
erin
Thu, 01/17/2013 - 11:59
11514 reads — 1 comment

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
15568 reads — 0 comments

Why does set_qos() crash in /lib/libc.so?

Note: Applies to RTI Connext 4.x and above and Red Hat Enterprise Linux 5. If DDS_DomainParticipantFactory_set_qos() crashes, the stack trace begins with free () from /lib/libc.so.6 and if you're making any calls to mlockall() , explicitly or implicitly, you may be running into a known bug in glibc ...
erin
Thu, 01/17/2013 - 11:44
2662 reads — 0 comments

How do I use RTI Data Distribution Service on a 64-bit platform?

Note: RTI Data Distribution Service 4.0 and 4.1. RTI Data Distribution Service 4.1d provides native support for these 64-bit platforms: Red Hat Enterprise Linux 3.0 and 4.0 Solaris 10 Windows XP Professional x64 Edition To build and run earlier versions of RTI Data Distribution Service applications ...
Fernando Garcia
Thu, 01/17/2013 - 06:41
3967 reads — 0 comments

Why is my application unable to add a multicast address?

Note: Applies to NDDS 3.x, RTI Connext 4.x and above. Many operating systems, including Linux, limit the number of multicast group memberships that a machine can belong to simultaneously. (A "multicast group membership" indicates that a machine is listening to messages for a specific multicast IP ...
Fernando Garcia
Mon, 01/14/2013 - 07:58
16268 reads — 0 comments

Why do I get a Java 'out of memory' error from rtiddsgen when using a large data type?

Note: Applies to RTI Connext 4.x and above. If your IDL file defines a large data type and rtiddsgen reports an "out of memory" error, increasing the Java heap memory may help. To do this, open $NDDSHOME/scripts/rtiddsgen with an editor of your choice and add -X options (see below) to the last line ...
Fernando Garcia
Mon, 01/14/2013 - 03:16
3992 reads — 0 comments

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