Abstract: The invention relates to tracing the execution path of a computer program comprising at least one module including a plurality of instructions. At least one of these instructions is a branch instruction. Each branch instruction is identified and evaluated to be one of true and false. An evaluation of true results in a unique identifier being pushed into a predefined area of storage. This unique identifier is associated with the instructions executed as a result of an evaluation of true.

Abstract: Provided are methods, apparatus and computer programs for monitoring operational data relating to a sequence of data processing operations in a network of data processing units. In response to specified boundaries for data gathering, operational data is selectively gathered into discrete data partitions for a desired time period, a desired set of processing nodes, and/or a desired set of process executions. A set of event listeners invoke operations of a data gatherer in response to events within a processing sequence and the data gatherer allocates operational data to different ones of a set of discrete logical data containers in response to notifications from the event listeners. The data collection is responsive to system events such as a collection interval expiry to end data collection for a first partition and start data collection for a second partition.

Abstract: A data processing apparatus includes a set of components for monitoring data relating to the operation of a plurality of data processing units. Each data processing unit includes connection points for connecting to others of the data processing units and an operational data processing component for processing data. The set of components includes event listeners located at the connection points for detecting events within the flow of processing operations at the data processing units.