Information processing device and error processing method

An information processing device comprising:

• a first processing unit;
• a second processing unit that operates in synchronization with the first processing unit;
• a common unit that outputs an identical signal to the first processing unit and the second processing unit;
• a first detection unit that detects an error occurred in the first processing unit;
• a second detection unit that detects an error occurred in the second processing unit;
• a first recording unit that records information concerning the error detected by the first detection unit;
• a second recording unit that records information concerning the error detected by the second detection unit;
• a comparison unit that determines whether the first processing unit and the second processing unit operate in synchronization with each other, by comparing an output from the first processing unit with an output from the second processing unit;
• a control unit that, when the first detection unit and the second detection unit simultaneously detect uncorrectable errors and it is determined that the first processing unit and the second processing unit operate in synchronization with each other, selects one of the first processing unit and the second processing unit;
• and
• a selector that sends an output from the selected one to the common unit.

An error processing method for performing an error processing on an information processing device, which includes a first processing unit, a second processing unit operating in synchronization with the first processing unit, and a common unit that outputs an identical signal to the first processing unit and the second processing unit, the method comprising:

• detecting an error occurred in the first processing unit by using a first detection unit;
• detecting an error occurred in the second processing unit by using a second detection unit;
• determining whether the first processing unit and the second processing unit operate in synchronization with each other, by comparing an output from the first processing unit with an output from the second processing unit;
• when the first detection unit and the second detection unit simultaneously detect uncorrectable errors and it is determined that the first processing unit and the second processing unit operate in synchronization with each other, selecting one of the first processing unit and the second processing unit;
• and
• sending an output from the selected one to the common unit.