Error detection and isolation

• US 9,218,240 B2
• Filed: 09/26/2013
• Issued: 12/22/2015
• Est. Priority Date: 09/26/2013
• Status: Expired due to Fees

• Current Assignee: GlobalFoundries, Inc.
• Original Assignee: GlobalFoundries, Inc.
• Inventors: Chambers, Scott L., McCoy, Doyle J., Chen, An Ding
• Primary Examiner(s): Merant, Guerrier
• Application Number:
  US14/038,308
• Publication Number:
  US 20150089332A1
• Time in Patent Office: 817 Days
• US Class Current: 1/1
• CPC Class Codes: G06F 11/10 Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
• CPC Class Codes: H03M 13/09 Error detection only, e.g. using cyclic redundancy check [CRC] codes or single parity bit
• CPC Class Codes: H03M 13/1515 Reed-Solomon codes
• CPC Class Codes: H03M 13/152 Bose-Chaudhuri-Hocquenghem [BCH] codes
• CPC Class Codes: H03M 13/19 Single error correction without using particular properties of the cyclic codes, e.g. Hamming codes, extended or generalised Hamming codes
• CPC Class Codes: H03M 13/2957 Turbo codes and decoding
• CPC Class Codes: H03M 13/6306 Error control coding in combination with Automatic Repeat reQuest [ARQ] and diversity transmission, e.g. coding schemes for the multiple transmission of the same information or the transmission of incremental redundancy H03M13/3761, H03M13/3769 and H03M13/635 take precedence
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/203 Details of error rate determination, e.g. BER, FER or WER
• CPC Class Codes: H04L 2001/0094 Bus

Abstract

An approach to determine whether errors associated with transmitted data are associated with a transmitting device, a receiving device, and/or a connecting device that connects the transmitting device to the receiving device. The approach includes a method that includes receiving transmitted data with a buffer. The approach further includes analyzing the transmitted data which includes an error correcting process to detect errors and determine that the transmitted data has an error that requires additional analysis. The approach further includes determining that the error is associated with a receiving device, the transmitting device, or a connecting device that connects the receiving device and the transmitting device.

Claims

1. A method comprising:

receiving transmitted data within a buffer, wherein the transmitted data includes an identifier for a transmitting device;

analyzing the transmitted data, which includes using an error correcting process to detect errors;

determining that the transmitted data has an error that requires additional analysis; and

determining that the error is associated with a receiving device, the transmitting device, or a connecting device that connects the receiving device and the transmitting device,

wherein the determining that the error is associated with the receiving device, the transmitting device, or the connecting device includes;

sending the error to a transmitter processor and a receiver processor for further analysis as to whether the receiving device, the transmitting device, or the connecting device is a cause of the error; and

analyzing a temperature and humidity level by a processor associated with the receiving device.

2. The method of claim 1, further comprising generating a display of an analysis that indicates whether the transmitting device, the receiving device, or the connecting device is causing the error, and displaying the analysis on a graphical user interface (GUI).

3. The method of claim 1, wherein the receiving the transmitted data includes receiving error correcting code and control code.

4. The method of claim 3, wherein the error correcting code is associated with at least one of a forward error correcting (FEC) code, a Reed-Solomon code, and a turbo code.

5. The method of claim 3, wherein the control code includes code that identifies a bus lane of the connecting device which is associated with the transmitted data.

6. The method of claim 1, wherein the determining that the transmitted data has the error includes using a checksum to analyze the transmitted data.

7. The method of claim 1, wherein the determining that the transmitted data has the error includes analyzing a location and a quantity of error bits within the transmitted data.

8. The method of claim 1, further comprising:

receiving additional transmitted data;

determining that the additional transmitted data includes a different error; and

sending a trap, that includes information about the different error, to a processor, wherein the processor performs additional analysis to determine that the different error is associated with the receiving device, the transmitting device, or the connecting device.

11. The method of claim 1, further comprising:

receiving additional transmitted data within a second buffer;

determining that the additional transmitted data does not include any errors; and

sending a buffer credit to the transmitting device, that indicates the additional transmitted data was received and includes a request for additional data.

12. The method of claim 1, further comprising:

receiving additional transmitted data;

determining that the additional transmitted data includes a different error; and

sending a request to resend the additional transmitted data.

13. The method of claim 1, wherein steps of claim 1 are provided by a service provider on a subscription, advertising, and/or fee basis.

14. The method of claim 1, further comprising providing a computer infrastructure operable to perform the steps of claim 1 and the connecting device is a large scale copper serial attached SCSI (SAS) fabric environment.

9. A method comprising:

receiving transmitted data within a buffer, wherein the transmitted data includes an identifier for a transmitting device;

analyzing the transmitted data, which includes using an error correcting process to detect errors;

determining that the transmitted data has an error that requires additional analysis;

determining that the error is associated with a receiving device, the transmitting device, or a connecting device that connects the receiving device and the transmitting device;

receiving additional transmitted data;

determining that the additional transmitted data includes a different error; and

sending a trap, that includes information about the different error, to a processor, wherein the processor performs additional analysis to determine that the different error is associated with the receiving device, the transmitting device, or the connecting device,

wherein the additional analysis further compromises;

analyzing a bit error rate of a bus lane associated with the transmitted data and analyzing the bit error rate associated with other bus lanes; and

analyzing one or more of a standard deviation, tree-analysis, binomial analysis, and regression analysis of the error and the different error.

10. The method of claim 9, wherein the transmitted data includes identifier information that identifies the transmitting device and a bus lane identifier that identifies the bus lane in the connecting device used to transmit the additional transmitted data.

15. A system comprising:

a CPU, a computer readable memory and a computer readable storage media;

program instructions to analyze transmitted data received from a device;

program instructions to determine when an error exists in the transmitted data; and

program instructions to analyze the error to determine which device caused the error, or requesting retransmission of the transmitted data when the error is found,

wherein the device that caused the error includes one of a receiving device, a transmitting device, and a connecting device that connects the receiving device and the transmitting device,

wherein the program instructions to analyze the error to determine that the error is caused by one of the receiving device, the transmitting device, or the connecting device includes;

program instructions to send the error to a transmitter processor and a receiver processor for further analysis as to whether the receiving device, the transmitting device, or the connecting device is a cause of the error; and

program instructions to analyze a temperature and humidity level by a processor associated with the receiving device, and

wherein the program instructions are stored on the computer readable storage media for execution by the CPU via the computer readable memory.

16. The system of claim 15, wherein the error is associated with temperature levels that result in a quantity of errors that exceed a threshold over a time period.

17. The system of claim 15, wherein the error is associated with a connecting device that allows for a transmitting device to send the transmitted data.

18. The system of claim 17, wherein the error is associated with a mechanical failure of the connecting device based on determining that the error is greater than a one of a half standard deviation, one standard deviation, or two standard deviations or based on determining that a bit error rate is above a threshold for all lanes associated with the connecting device during a particular period of time.

19. A computer program product comprising a non-transitory computer readable storage medium having readable program code embodied in the non-transitory computer readable storage medium, the computer program product includes at least one component operable to:

receive transmitted data within a buffer from a transmitting device, wherein the transmitted data includes an identifier for a transmitting device, control code that identifies a bus lane of a connecting device being used to send the transmitted data, and a quantity of bits;

analyze the transmitted data for errors to determine whether the quantity of bits in the transmitted data is the same as the quantity of bits in the transmitted data that is received;

determine that the transmitted data has an error based on the quantity of bits in the transmitted data being different than the quantity of bits in the received transmitted data;

determine whether the error can be corrected, based on a type of error in the transmitted data;

correct the error based on determining that the type of error can be corrected so that the transmitted data can be used by a processor;

send a buffer credit to the transmitting device to transmit additional data, based on the correcting of the error, wherein the buffer credit is a notification to the transmitting device that the transmitted data is received and to transmit the additional data;

determine that the error is associated with a receiving device, the transmitting device, or the bus lane of the connecting device being used to send the transmitted data between the transmitting device and the receiving device; and

receive the additional data from the transmitting device, wherein the additional data is transmitted through a different bus lane of the connecting device than the bus lane used to transmit the transmitted data,

wherein the at least one component operable to determine that the error is associated with the receiving device, the transmitting device, or the connecting device includes the at least one component operable to;

send the error to a transmitter processor and a receiver processor for further analysis as to whether the receiving device, the transmitting device, or the connecting device is a cause of the error; and

analyze a temperature and humidity level by a processor associated with the receiving device.