CN117498991A - Testability fault injection method and device based on retransmission function prototype device - Google Patents
Testability fault injection method and device based on retransmission function prototype device Download PDFInfo
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- CN117498991A CN117498991A CN202311515763.5A CN202311515763A CN117498991A CN 117498991 A CN117498991 A CN 117498991A CN 202311515763 A CN202311515763 A CN 202311515763A CN 117498991 A CN117498991 A CN 117498991A
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- 238000002347 injection Methods 0.000 title claims abstract description 97
- 239000007924 injection Substances 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000012795 verification Methods 0.000 claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims description 13
- 238000004088 simulation Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
- H04L1/203—Details of error rate determination, e.g. BER, FER or WER
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0079—Formats for control data
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
- H04L1/1642—Formats specially adapted for sequence numbers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1848—Time-out mechanisms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/188—Time-out mechanisms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Computer Security & Cryptography (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
- Test And Diagnosis Of Digital Computers (AREA)
Abstract
The invention provides a testability error injection method and a testability error injection device based on retransmission function prototype equipment, wherein the method comprises the following steps: coding error injection information into an IB message, and injecting the IB message into an IB switching network; when a device link layer in an IB switching network receives the IB message, analyzing the IB message to obtain error injection information, and performing appointed error injection according to the error injection information; based on the appointed error injection result, triggering the prototype verification equipment to verify the retransmission function under various retransmission scenes. The technical scheme of the invention improves the accuracy and the robustness of the retransmission function verification and ensures that the retransmission function of the real chip after streaming is correct.
Description
Technical Field
The invention belongs to the technical field of network transmission, and particularly relates to a testability error injection method and device based on retransmission function prototype equipment.
Background
In the InfiniBand high-performance switching network, as the throughput bandwidth increases, the bit error rate of the physical layer gradually increases, and the reliability of point-to-point transmission is affected. Therefore, the conventional scheme proposes a link layer retransmission mechanism to improve the transmission accuracy. However, since the link layer retransmission mechanism solves the propagation errors of the physical layer, the optical fiber, and the like, the conventional prototype verification device such as the FPGA and the like lacks an adequate verification means, and cannot fully verify the propagation errors of the physical layer, and cannot cover various scenarios that may cause the retransmission function to fail, such as single message errors, continuous repeated transmission errors, continuous output errors of multiple messages, and transmission errors of retransmission control messages notifying the occurrence of errors, which may cause the retransmission function to fail on the real device after streaming.
Disclosure of Invention
The invention aims to provide a testability error injection method and device based on retransmission function prototype equipment, which aim to solve the problem of sufficient verification of retransmission functions on a link layer.
According to a first aspect of the present invention, there is provided a method for testability fault injection based on a retransmission function prototype device, including:
coding error injection information into an IB message, and injecting the IB message into an IB switching network;
when a device link layer in an IB switching network receives the IB message, analyzing the IB message to obtain error injection information, and performing appointed error injection according to the error injection information;
based on the appointed error injection result, triggering the prototype verification equipment to verify the retransmission function under various retransmission scenes.
Preferably, the encoding the error injection information into the IB message further comprises:
and adding error injection information codes into the LRH-Rsv field by redefining the IB message field, wherein the error injection information comprises error injection messages, error injection times or retransmission control message error injection.
Preferably, the triggering prototype verification device verifies the retransmission function under multiple retransmission scenarios, and further includes:
triggering the prototype verification equipment to verify whether a single message error occurs, verifying whether a continuous repeated transmission error occurs or whether a plurality of messages are continuously output, or verifying whether a retransmission control message notifying the occurrence of the error occurs or not.
Preferably, the prototype verification apparatus comprises a FGPA simulation platform or a hardware accelerator simulation platform.
Preferably, the triggering prototype verification device verifies the retransmission function under multiple retransmission scenarios, and further includes:
and verifying the overtime behavior of the retransmission function by using a prototype verification device, and performing stress test on the retransmission function.
According to a second aspect of the present invention, there is provided a testability error injection device based on a retransmission function prototype apparatus, comprising:
the message generating unit is used for encoding the error injection information into an IB message and injecting the IB message into an IB switching network;
the error injection unit is used for analyzing the IB message to obtain error injection information when the device link layer in the IB switching network receives the IB message, and performing appointed error injection according to the error injection information;
and the retransmission verification unit is used for triggering the prototype verification equipment to verify the retransmission function under various retransmission scenes based on the appointed error injection result.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the invention verifies the designability error injection of the link layer in the prototype device, and improves the accuracy of the verification of the retransmission function. By simulating abnormal packet loss behavior, verifying overtime behavior of the retransmission function, simulating continuous error of packets transmitted in a network, verifying robustness of the retransmission function, expanding verification range, covering various scenes possibly causing failure of the retransmission function, and ensuring correctness of the retransmission function of a real chip after streaming by performing pressure test of the retransmission function on prototype equipment.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure and process particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a general flow chart of a method of testability fault injection based on a retransmission function prototype device according to the present invention.
Fig. 2 is a schematic diagram of the retransmission and correction procedure for each stage of equipment in an InfiniBand switched network according to the present invention.
Fig. 3 is a flow chart of a per-level device link layer check error injection information process in accordance with the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which are derived by a person skilled in the art from the embodiments according to the invention without creative efforts, fall within the protection scope of the invention.
Based on the analysis, the invention provides a verification method based on link layer designability error injection, and the code carries error injection information by redefining an LRH-Rsv field in an IB message. When the link layer of each level of equipment analyzes the message, performing appointed error injection according to error injection information, triggering the retransmission function of the prototype equipment, completing verification of various retransmission scenes, and finally determining the correctness of the retransmission function by reading a specially designed testability register matched with various scenes.
Referring to the flowchart of fig. 1, the method for performing testability fault injection based on retransmission function prototype equipment provided by the invention comprises the following steps:
step 101: coding error injection information into an IB message, and injecting the IB message into an IB switching network.
And redefining an IB message field, adding error injection information codes including error injection messages, error injection times or retransmission control message error injection and the like into an LRH-Rsv field, and injecting the IB message into a prototype verification network for transmission.
Step 102: when the device link layer in the IB switching network receives the IB message, analyzing the IB message to obtain error injection information, and performing appointed error injection according to the error injection information.
As shown in fig. 2, when the link layer of each level of device in the IB switching network parses the message, appointed fault injection such as continuous fault injection, control message fault injection and the like can be performed according to the carried fault injection information. And after the message is wrongly injected, the message is transmitted in the network, each stage of equipment checks the wrongly injected information, and the error correction is carried out after retransmission and then the message is transmitted to the target equipment. A flow chart of the process of checking fault injection information for each level of device link layer in an IB switched network is shown in fig. 3. When the message is analyzed, the check field is recalculated, and whether transmission errors occur is judged to determine whether to send a retransmission request control message.
If continuous error injection of a plurality of messages is needed, the redefined LRH-Rsv fields in the continuous messages are set to enable error injection enabling, and the link layer transmitting side performs error injection on all the passing packets.
If multiple errors are needed to be injected into a single message, setting the number of errors for the redefined LRH-Rsv field in the message, starting the error injection enabling, and enabling the link layer transmitting side to inject the packet into the error for multiple times until the set number of errors is reached.
If the retransmission control message is required to be wrongly injected, the wrongly injected control message and the wrongly injected enabling are set for the redefined LRH-Rsv field in the message, the sending side carries out wrongly injected, the receiving side receives the wrongly packet and checks the wrongly injected control message, and the sending side sends the wrongly retransmission control message according to the wrongly injected control message of the control message in the packet, and the sending side discards the wrongly injected control message after receiving the wrongly injected control message.
Step 103: based on the appointed error injection result, triggering the prototype verification equipment to verify the retransmission function under various retransmission scenes.
The prototype verification apparatus includes a FGPA simulation platform or a hardware accelerator simulation platform. By triggering the retransmission function of the prototype device, the transmission correctness in different scenes can be verified. As a specific example, the prototype verification apparatus may be instructed to verify whether a single message error occurs, to verify whether a continuous repeated transmission error occurs or a plurality of message continuous output errors occur, or to verify whether a retransmission control message notifying the occurrence of an error also occurs.
In addition, the method can verify the overtime behavior of the retransmission function by simulating the abnormal packet loss behavior. If the receiving side does not receive the packet with the next sequence number for more than a preset time (such as 10 us), the retransmission control message is automatically triggered, so that the whole packet is retransmitted. When the packet is sent, after the packet loss mark coded in the LRH-Rsv field is analyzed, the packet is actively discarded by hardware, the packet loss behavior when the packet propagates in the network is simulated, and the retransmission control message is automatically triggered when the receiving side is overtime.
If a series of data messages enter the IB switching network of the invention, and if the link layer of the transmitting side detects that a certain IB message field LRH-Rsv contains error-filling counting information, the transmitting side of the link layer of the local end modifies errors for the CRC check field of the packet. The packet is transmitted through a physical layer medium of the prototype device to reach a receiving side of the subordinate device, the receiving side can automatically trigger a verification program of the packet, if any verification errors exist, the retransmission control message can be automatically triggered, when the retransmission control message reaches a transmitting side, the retransmission control logic of the transmitting side can check the number of times that the packet is wrongly injected and the information which is carried in the message and needs to be wrongly injected for several times, and if the times are equal, the wrongly injected packet is stopped; if not, continuing to modify the CRC field of the packet to carry out error injection, repeating the whole error injection and detection process until the set retransmission times of the packet are reached, and stopping error injection. And when the receiving side checks to be correct, continuing to transmit the message to the back-stage equipment.
According to the preferred embodiment of the invention, by designing specific testability registers, matching with various verification scenarios, the various scenarios for the retransmission are triggered and the retransmission function is correct. The testability registers include a retransmission control message count register of the transmitting side, a retransmission control message count register of the receiving side, a total message count register of the transmitting side (including retransmission packets), and the like. Retransmission conditions occurring at each stage of the device can be obtained in the prototype device through the testability register to check with expected misinjection behavior, and the function of the retransmission caused by the artificial misinjection is determined to be triggered correctly.
Compared with the prior art, the testability error injection method based on the retransmission function prototype device provided by the invention has the following advantages: the invention verifies the designability error injection of the link layer in the prototype device, and improves the accuracy of the verification of the retransmission function. By simulating abnormal packet loss behavior, verifying overtime behavior of the retransmission function, simulating continuous error of packets transmitted in a network, verifying robustness of the retransmission function, expanding verification range, covering various scenes possibly causing failure of the retransmission function, and ensuring correctness of the retransmission function of a real chip after streaming by performing pressure test of the retransmission function on prototype equipment. In the pressure test, a tester configures a large number of packets for a large number of retransmissions, and the retransmission probability is far higher than the actual probability that the transmission error of the packets in the network may occur.
Accordingly, the present invention provides in a second aspect a device for testability error injection based on a retransmission function prototype apparatus, comprising:
the message generating unit is used for encoding the error injection information into an IB message and injecting the IB message into an IB switching network;
the error injection unit is used for analyzing the IB message to obtain error injection information when the device link layer in the IB switching network receives the IB message, and performing appointed error injection according to the error injection information;
and the retransmission verification unit is used for triggering the prototype verification equipment to verify the retransmission function under various retransmission scenes based on the appointed error injection result.
The above apparatus may be implemented by the method for performing error injection based on testability of a retransmission function prototype device provided in the embodiment of the first aspect, and specific implementation manner may be referred to the description in the embodiment of the first aspect and will not be repeated herein.
It is understood that the circuit structures, names and parameters described in the above embodiments are only examples. Those skilled in the art may also make and adjust the structural features of the above embodiments as desired without limiting the inventive concept to the specific details of the examples described above.
While the invention has been described in detail with reference to the foregoing embodiments, it will be appreciated by those skilled in the art that variations may be made in the techniques described in the foregoing embodiments, or equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for testability fault injection based on a retransmission function prototype device, comprising:
coding error injection information into an IB message, and injecting the IB message into an IB switching network;
when a device link layer in an IB switching network receives the IB message, analyzing the IB message to obtain error injection information, and performing appointed error injection according to the error injection information;
based on the appointed error injection result, triggering the prototype verification equipment to verify the retransmission function under various retransmission scenes.
2. The method of claim 1, wherein encoding the error injection information into the IB message further comprises:
and adding error injection information codes into the LRH-Rsv field by redefining the IB message field, wherein the error injection information comprises error injection messages, error injection times or retransmission control message error injection.
3. The method for error injection testability based on a retransmission function prototype device according to claim 1, wherein the triggering prototype verification device verifies the retransmission function under multiple retransmission scenarios, further comprising:
triggering the prototype verification equipment to verify whether a single message error occurs, verifying whether a continuous repeated transmission error occurs or whether a plurality of messages are continuously output, or verifying whether a retransmission control message notifying the occurrence of the error occurs or not.
4. The method of claim 1, wherein the prototype verification device comprises an FGPA simulation platform or a hardware accelerator simulation platform.
5. The method for error injection testability based on a retransmission function prototype device according to claim 1, wherein the triggering prototype verification device verifies the retransmission function under multiple retransmission scenarios, further comprising:
and verifying the overtime behavior of the retransmission function by using a prototype verification device, and performing stress test on the retransmission function.
6. A testability error injection device based on a retransmission function prototype device, comprising:
the message generating unit is used for encoding the error injection information into an IB message and injecting the IB message into an IB switching network;
the error injection unit is used for analyzing the IB message to obtain error injection information when the device link layer in the IB switching network receives the IB message, and performing appointed error injection according to the error injection information;
and the retransmission verification unit is used for triggering the prototype verification equipment to verify the retransmission function under various retransmission scenes based on the appointed error injection result.
7. The apparatus for error resilience based on retransmission functionality prototype devices according to claim 6, wherein the message generating unit is further configured to:
and adding error injection information codes into the LRH-Rsv field by redefining the IB message field, wherein the error injection information comprises error injection messages, error injection times or retransmission control message error injection.
8. The apparatus for error injection based on testability of a retransmission functionality prototype device according to claim 6, wherein the retransmission verification unit is further configured to:
triggering the prototype verification equipment to verify whether a single message error occurs, verifying whether a continuous repeated transmission error occurs or whether a plurality of messages are continuously output, or verifying whether a retransmission control message notifying the occurrence of the error occurs or not.
9. The apparatus of claim 6, wherein the prototype verification device comprises an FGPA simulation platform or a hardware accelerator simulation platform.
10. The apparatus for error injection based on testability of a retransmission functionality prototype device according to claim 6, wherein the retransmission verification unit is further configured to:
and verifying the overtime behavior of the retransmission function by using a prototype verification device, and performing stress test on the retransmission function.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311515763.5A CN117498991B (en) | 2023-11-14 | Testability fault injection method and device based on retransmission function prototype device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311515763.5A CN117498991B (en) | 2023-11-14 | Testability fault injection method and device based on retransmission function prototype device |
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| CN117498991A true CN117498991A (en) | 2024-02-02 |
| CN117498991B CN117498991B (en) | 2024-05-28 |
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| CN113986624A (en) * | 2020-07-27 | 2022-01-28 | 英特尔公司 | In-system verification of interconnects by error injection and measurement |
| CN115878368A (en) * | 2022-09-29 | 2023-03-31 | 山东华芯半导体有限公司 | ECC error injection function verification method |
| CN116347510A (en) * | 2023-04-21 | 2023-06-27 | 中国科学院大学 | Combined coding method based on physical layer cross-technology communication |
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| CN102209000A (en) * | 2011-07-05 | 2011-10-05 | 北京航空航天大学 | Avionics full duplex switched Ethernet (AFDX) network terminal system simulator with layered fault injection and fault analysis functions |
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