Torrent Systems, Inc.

Jeffrey D Ives

Michael James Beckerle

Daniel W Kohn

Allen M Razdow

Jerry Lee Callen

Daniel L Leary

Robert Louise Krawitz

Edward S A Zyzkowski

Seven Rosenthal

James Richard Burns

A performance monitor represents execution of a data flow graph by changing performance information along different parts of a representation of that graph. If the graph is executed in parallel, the monitor can show parallel operator instances, associated datalinks, and performance information relevant to each. The individual parallel processes executing the graph send performance messages to the performance monitor, and the performance monitor can instruct such processes to vary the information they send. The monitor can provides 2D or 3D views in which the user can change focus, zoom and viewpoint. In 3D views, parallel instances of the same operator are grouped in a 2D array. The data rate of a datalink can be represented by both the density and velocity of line segments along the line which represent it. The line can be colored as a function of the datalink's source or destination, its data rate, or the integral thereof. Alternatively, a histogram can be displayed along each datalink's line, displaying information about the rate of, total of, or value of a field in, the data sent, at successive intervals. The user can click on objects to obtain additional information, such as bar charts of statistics, detailed performance listings, or invocation of a debugger. The user can selectively collapse representations of graph objects into composite representations, highlight objects which are out of records or which have flow blockages; label operators; turn off the display of objects; and record and playback the performance information.

Apparatuses and methods for monitoring performance of parallel computing

A system provides an environment for parallel programming by providing a plurality of modular parallelizable operators stored in a computer readable memory. Each operator defines operation programming for performing an operation, one or more communication ports, each of which is either an input port for providing the operation programming a data stream of records, or an output port for receiving a data stream of records from the operation programming and an indication for each of the operator's input ports, if any, of a partitioning method to be applied to the data stream supplied to the input port. An interface enables users to define a data flow graph by giving instructions to select a specific one of the operators for inclusion in the graph, or instructions to select a specific data object, which is capable of supplying or receiving a data stream of one or more records, for inclusion in the graph, or instructions to associate a data link with a specific communication port of an operator in the graph, which data link defines a path for the communication of a data stream of one or more records between its associated communications port and either a specific data object or the specific communication port of another specific operator in said graph. The execution of a data flow graph equivalent to that defined by the users is automatically parallelized by causing a separate instance of each such operator, including its associated operation programming, to be run on each of multiple processors, with each instance of a given operator having a corresponding input and output port for each input and output port of the given operator, and by automatically partitioning the data stream supplied to the corresponding inputs of the instances of a given operator as a function of the partitioning method indication for the given operator's corresponding input.

Apparatuses and methods for programming parallel computers

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Cambridge, MA, United States of America

Jeffrey D Ives