Data processing system

A data processing system, comprising:

• a plurality of control modules that operate while communicating with each other in performing a cooperative data processing;
• and
• a log analysis circuit that collects logs acquired by a log acquisition function of the individual control modules, merges information about the collected logs in accordance with timestamps, and generates a system log of software running in the entire data processing system,
• wherein the control modules each include first and second communication interfaces and the control modules are coupled in series such that a second communication interface of a preceding one of the control modules is connected to a first communication interface of a succeeding one of the control modules,
• wherein the control modules each include a timer that counts time common to the entire data processing system implementing said cooperative data processing,
• wherein a time synchronization process is performed for cooperative data processing between the control modules so that time information derived from a timer in a low-level control module is synchronized with time information derived from a timer in a high-level control module, and
• wherein the control modules perform a log acquisition process during an application process to acquire a log and add a timestamp based on timer time to the acquired log.

A data processing system, comprising:

• a plurality of control modules capable of communicating with each other,
• wherein the control modules each include first and second communication interfaces and a timer, and perform a required application process, a unit log generation process, and a time synchronization process in accordance with a program executed by the control modules, the time synchronization process being performed by the timer for time synchronization purposes,
• wherein the control modules are coupled in series such that a second communication interface of a preceding one of the control modules is connected to a first communication interface of a succeeding one of the control modules,
• wherein, at a test point designated by a program executed in the unit log generation process, the unit log generation process generates timestamps in accordance with log information and with time information derived from the timer, and accumulates the timestamps together with attribute information about the test point to generate a unit log, and
• wherein the time synchronization process synchronizes the time information derived from the timer in a low-level control module with the time information derived from the timer in high-level control module,
• wherein an external interface circuit of a first control module acquires time information from its local timer upon receipt of a first command from a second control module, receives from the second control module a second command together with timer time information of the second control module prevailing at a time that the second control module output the first command, acquires its local timer time information at a time of outputting of a third command to toe second control module, and receives a fourth command from the second control module together with timer time information of the second control module prevailing at a time the second control module received the third command.

A data processing system, comprising:

• a plurality of control modules, each control module comprising:
• a timer:
• a central processing unit (CPU);
• a first communication interface;
• and
• a second communication interface,
• wherein the control modules are coupled in series in such a manner that a second communication interface of a preceding one of the control modules is connected to a first communication interface of a succeeding one of the control modules,
• wherein the CPU executes a required application process, a unit log generation process, and a time synchronization process in accordance with a program executed by the control module, the time synchronization process being performed by the timer for time synchronization purposes,
• wherein, at a test point designated by a program executed in the unit log generation process, the unit log generation process generates timestamps in accordance with log information and with time information derived from the timer, and accumulates the timestamps together with attribute information about the test point to generate a unit log, and
• wherein the time synchronization process receives a first time information when the preceding one of the control modules transmits a first command, acquires a second time information from the timer when the first command is received through the first communication interface, and synchronizes the second time information with the first time information.