A Flexible System For In Situ Triggers
Abstract: Triggers are an important mechanism for adapting I/O and visualization actions as a simulation runs. We describe the system for triggers in the Ascent in situ infrastructure. This system splits a trigger into two components, when to perform an action and what actions to perform. The decision for when to perform an action can be based on different types of factors, such as mesh topology, scalar fields, or performance data. The actions to perform are also varied, ranging from the traditional action of saving simulation state to disk to performing arbitrary visualizations and analyses. We also include details on the implementation and a short example demonstrating how it can be used.
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