JPH0291736A - Debug system for parallel object directional type system - Google Patents

Abstract

PURPOSE:To facilitate the debug of a parallel processing system by displaying an execution process of the parallel processing system based on an object direction. CONSTITUTION:A message store part 11 is provided with each processor 10 for constituting a parallel processing system, and when a object stored in its processor 10 transmits a message, it is transmitted by giving a logical time thereto, and at the time of receiving the message, the message is stored in a message file 12 together with the given logical time. A message sorting part 13 sorts the contents of the message file 12 in order of the logical time, and generates a message sort file 14. Subsequently, a display part 15 inputs the message sort file 14 and an object display position file 16, and based on a user's instruction, a flow of the message between the objects is displayed in accordance with the logical time. In such a way, communication between the objects in the parallel processing system is displayed so as to be easily understandable, and a difficulty of debug is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a depacking method for a parallel object-oriented system that performs processing by exchanging messages between objects.

(Prior Art) When depacking a program, a method is generally used in which the program is stopped at a specific position and the contents of memory are examined. However, in an environment where multiple processors operate asynchronously, it is impossible to stop all processors in a constant state, so conventional techniques are not used. Therefore, new depacking techniques are needed in parallel processing systems.

In recent years, object-oriented systems have been attracting attention as a new programming method. An object-oriented system is a system that performs processing by exchanging messages between objects that have a certain set of functions and knowledge. When an object receives a message,
Perform processing corresponding to the message. Additionally, objects have variables that hold their own internal state, and other objects cannot reference them without permission.

The nature of such object-oriented systems inherently lends itself to parallel processing. However, there has not been much research into depacking methods for object-oriented systems, and there has been no established method for depacking object-oriented systems in parallel processing environments, making depacking difficult. .

(Problems to be Solved by the Invention) As described above, depacking a parallel processing system in which a plurality of processors operate asynchronously has the drawback of being difficult because conventional depacking techniques are not used.

The present invention aims to reduce the difficulty of depacking in an object-oriented parallel processing system. It assigns a logical time to messages updated between objects, and controls the behavior of the entire system according to the logical time. The aim is to provide a depacking method by displaying.

[Configuration of the Invention (Means for Solving the Problems)] The present invention includes a message storage unit that assigns a logical time to all messages communicated between objects and stores them in a message file, and It is composed of a message sorting section that sorts messages in time order, and a display section that displays messages using a message sort file as a result of the sorting and an object display position file that indicates the display position of the object.

(Function) A message storage section is provided for each processor that constitutes the parallel processing system, and when an object stored in that processor sends a message, it assigns a logical time and sends it, and when it receives the message, it sends it with a logical time. , stores the message in the message file along with the assigned logical time.

The message sorting unit sorts the contents of the message file in logical time order and creates a message sort file. The display section receives the message sort file and object display position file as input, and displays the flow of messages between objects according to logical time based on the user's instructions.

As described above, communication between objects in a parallel processing system can be displayed in an easy-to-understand manner, and the difficulty of depacking can be reduced.

(Example) One embodiment of the present invention will be described below.

FIG. 1 is a diagram showing the configuration of the present invention. The system is composed of a plurality of processors IO, each processor storing objects and starting processing by receiving messages. Each processor has a message storage section 11.
is attached to the message file 2, which manages the logical time and stores the received message in the message file 2. The message sorting unit 13 sorts the contents of the message file 12 in logical time order and outputs it to the message sort file 14. The display section 15 displays the contents of the message sort file 14 according to the object display position file IB based on the user's instructions.

FIG. 2 is a diagram showing an example of the flow of messages between objects. In the figure, A-H indicates objects, and arrows indicate the flow of messages.

FIG. 3 shows the message in the example of FIG. 2 with a logical time added. As shown in the figure, the logical time increases by 1 each time an object is passed. However, objects that receive multiple input messages (G20 and H
2O), the logical time of the output message is the maximum value of the logical time of the input message +1.

FIG. 4 shows the contents of the message file. However, the contents of the message are omitted.

FIG. 5 shows the object display position and the contents of the file. The coordinates (x, y
) are stored. The contents of this file may be entered manually or automatically generated by a computer.

Figure 6 shows the contents of the message file in Figure 41 in the 5th file.
All are displayed according to the contents of the object display position file shown in the figure. Here, the logical time is expressed by the number at the tip of the arrow. By displaying it like this,
It is possible to two-dimensionally read to which object each object sent and received a message at which logical time.

Further, in FIG. 7, the message communication of logical matter 1 is represented by a dotted line, and the message communication of logical time 2 is represented by a solid line. By displaying in this way, it is possible to read the behavior of the object at a specific logical time.

Further, the display section can perform various displays by changing the line type of the arrow or changing the color. It is also possible to have a function that focuses only on a specific object, to display multiple objects at the same coordinates, and to use various display methods based on user instructions.

[Effects of the Invention] As is clear from the above explanation, according to the present invention, the execution process of a parallel processing system based on object orientation can be displayed in an easy-to-understand manner, and the depacking of the parallel processing system can be facilitated. .

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of one embodiment of the present invention, FIG. 2 is a diagram showing an example of parallel processing system operation, and FIG. 3 is a diagram showing logical time of an example problem in one embodiment of the present invention. FIG. 4 is a diagram showing the contents of an example message file in one embodiment of the present invention. FIG. 5 is a diagram showing the contents of an example object display position file in one embodiment of the invention. FIG. 7 is a diagram displaying all the messages of the example in one embodiment of the present invention. FIG. 7 is a diagram displaying the messages regarding a specific logical time of the example in one embodiment of the present invention. 10... Processor, 11... Message storage unit. 12...Message file. 13...Message sorting section. 14...Message sort file, 15...Display section. 16...Object display position file. 20...Objects G, H

Claims (1)

[Claims] In a parallel object-oriented system in which multiple objects operate in parallel, logical times are assigned to messages sent and received between objects, and message information arranged in chronological order and object information specifying the display position of the objects are stored. A debugging method for a parallel object-oriented system, characterized in that the flow of messages sent and received within a specific logical time interval is displayed at the display position of the corresponding object.