15.6. Real-time behavior

Real-time applications have very tight constraints on data processing times. In order to comply with these constraints, Fast DDS can be configured to guarantee responses within a specified time. This is achieved with the following restraints:

• Allocating all the required memory during entity initialization, so that all the data processing tasks are heap allocation free (see Tuning allocations).

• Returning from blocking functions if the provided timeout is reached (see Non-blocking calls).

This section explains how to configure Fast DDS to achieve this behavior.

• 15.6.1. Tuning allocations
  • 15.6.1.1. Parameters on the participant
  • 15.6.1.2. Parameters on the DataWriter
  • 15.6.1.3. Parameters on the DataReader
  • 15.6.1.4. Full example
• 15.6.2. Non-blocking calls