CN109586996B - Cloud platform real-time testing system and method based on network message time delay comparison - Google Patents
Cloud platform real-time testing system and method based on network message time delay comparison Download PDFInfo
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Abstract
The invention discloses a cloud platform real-time testing system and method based on network message time delay comparison. The system comprises a tested cloud platform, M reference computers, a multicast message receiving and responding program, a test message generator and a monitoring analyzer; the method comprises the following steps: firstly, starting a monitoring analyzer, and monitoring and recording specified multicast messages; then starting a test message generator to periodically send multicast messages with sequentially increasing serial numbers; respectively starting multicast message receiving and responding programs in the reference computer and the virtual machine in the tested cloud platform, and sending responding messages with the same serial number to the test message generator when receiving the multicast messages; after a certain number of multicast messages are recorded, the monitoring function of the monitoring analyzer is stopped, the statistical analysis function is started, and the real-time data of the virtual machine in the cloud platform is obtained. The method is used for testing and evaluating the cloud platform and the virtual machine operating system provided by the cloud platform in real time, and has the advantages of simple equipment, strong practicability and high detection accuracy.
Description
Technical Field
The invention relates to the technical field of cloud platform real-time testing evaluation, in particular to a cloud platform real-time testing system and method based on network message time delay comparison.
Background
As the application of the cloud computing technology gradually extends to the field of industrial control, the real-time property of the cloud platform as an application operation carrier of the cloud computing technology also becomes a focus of people's attention. Because the control system often has a harsh requirement on the real-time performance, the real-time performance of the cloud platform is an important measurement index for selecting the cloud platform by the control system.
On one hand, the real-time performance of the traditional real-time operating system mainly depends on a scheduling mechanism based on priority, but unlike the general real-time operating system, the real-time performance of the cloud platform not only depends on the real-time performance of a Guest (virtual machine) operating system (Guest OS) hosted by an application, but also depends on the real-time performance of a Host operating system (Host OS) hosted by the Guest operating system. For example, in the cloud platform, the scheduling operation opportunity of the application program a depends on two-level scheduling, firstly the Host OS schedules the Guest OS hosted by the application program a, the Guest OS then schedules the application program a, and the application program a obtains the opportunity to be executed. The virtualization technology is a cornerstone of a cloud operating system, but is limited by the existing virtualization technology mechanism and implementation, and the existing operating system real-time measuring method is difficult to be applied to the real-time test of a cloud platform.
On the other hand, when the cloud computing technology is applied to a control system, an adapter is required to be introduced into the original control system, so that computing and control are separated, and connection between the physical world and a cloud platform is realized. The cloud platform is concentrated on computing, and the physical world information is collected and controlled through the communication between the network and the adapter, so that the connotation of the real-time performance of the cloud platform is essentially different from that of a traditional real-time operating system.
Disclosure of Invention
The invention aims to provide a cloud platform real-time testing system and method capable of evaluating whether a control system can be transferred to a cloud platform and selecting a suitable cloud platform product.
The technical solution for realizing the purpose of the invention is as follows: a cloud platform real-time testing system based on network message time delay comparison comprises a tested cloud platform, M reference computers, a test message generator and a monitoring analyzer;
the cloud platform to be tested is a cloud platform which deploys a set number of virtual machines according to test requirements, each virtual machine is respectively provided with a required operating system which is marked as Guest1, Guest2, … and Guest N, N is the number of the virtual machines, and each virtual machine runs a multicast message receiving and responding program; when the multicast message receiving and responding program receives the multicast message sent by the test message generator, sending a response message with the same serial number to the test message generator;
the reference computers are a plurality of physical computers serving as comparison references and marked as B-Computer1, B-Computer2 and B-Computer M, M is the number of the reference computers, and M is less than or equal to N; each reference computer installs an operating system consistent with the tested virtual machine and runs a multicast message receiving and responding program; when the multicast message receiving and responding program receives the multicast message sent by the test message generator, sending a response message with the same serial number to the test message generator;
the test message generator is used for periodically sending a program of a multicast message with adjustable intervals and gradually increased serial numbers; the test message generator is separately deployed on a physical computer, or is deployed on a reference computer or a computer where the monitoring analyzer is located according to the situation;
the monitoring analyzer is a program for monitoring the multicast message; the monitoring analyzer monitors and takes in specified multicast messages, and the time delay of the virtual machines in the tested cloud platform, the test message generator and the reference computer returning the same serial number is compared after statistical analysis, so that real-time data of the virtual machines in the tested cloud platform are obtained; the monitoring analyzer is separately deployed on a physical computer or on a reference computer or a computer where the test message generator is located according to the situation.
Further, the tested cloud platform comprises server hardware, a cloud operating system and a virtual machine system with determined quantity and configuration.
Further, the virtual machine system in the cloud platform to be tested is created according to the application system requirements, wherein the application system requirements include the memory size, the disk capacity, the independent or shared processor core, the network bandwidth and the operating system type of the virtual machine.
Furthermore, the reference computer adopts a physical computer with the same configuration as the virtual machine system, namely, the physical computer has the same memory size, disk capacity, network bandwidth and installed operating system as the virtual machine system.
Further, the multicast message receiving and responding program is a program for receiving and responding the multicast message with the sequence number and the sequence number increasing sent by the test message generator.
A cloud platform real-time testing method based on network message time delay comparison is characterized by comprising the following steps:
step 2, respectively starting multicast message receiving and responding programs in the base computers B-Computer1, B-Computer2, B-Computer and virtual machines Guest1, Guest2, … and Guest M in the tested cloud platform, and sending response messages with the same serial number to the test message generator when receiving the multicast messages sent by the test message generator;
step 3, starting a test message generator and periodically sending multicast messages, wherein the multicast messages carry sequence numbers which are sequentially increased;
and 4, when the set number of multicast messages are recorded, stopping the monitoring function of the monitoring analyzer, starting the statistical analysis function, comparing the time delay of the virtual machines in the tested cloud platform, the test message generator and the reference computer returning the same serial number, and giving real-time data of the virtual machines in the cloud platform.
Further, the response packet in step 3 refers to a UDP packet with the same sequence number replied to the sender when the virtual machine receives the multicast packet.
Further, the delay described in step 4 refers to a difference between the time stamps of the multicast packet with a certain sequence number sent by the external network and the time stamps of the response packet with the same sequence number sent back by the virtual machine system appearing on the network switch.
Further, the timestamp is obtained by monitoring of the monitoring analyzer.
Compared with the prior art, the invention has the following remarkable effects: (1) based on the control system cloud computing technology application architecture and the cloud platform real-time connotation, strong support is provided for the control system to evaluate whether the control system can be transferred to the cloud platform or not and select a proper cloud product; (2) the method has the advantages of simple equipment, strong practicability and high detection accuracy, and is suitable for the real-time test of the virtual machine system under the cloud platform environment.
Drawings
Fig. 1 is a general composition architecture diagram of a cloud platform real-time testing system based on network message delay comparison according to the present invention.
FIG. 2 is a flow chart of the B-computer and Guesti network receive and loopback procedure of the present invention.
Fig. 3 is a flowchart of a multicast message sending procedure of the test message generator according to the present invention.
FIG. 4 is a flow chart of the test message generator program network receiving program of the present invention.
Fig. 5 is a flowchart of a network message delay analysis procedure of the snoop analyzer of the present invention.
Detailed Description
The invention discloses a real-time testing method for a cloud platform, which can be used for testing and evaluating the real-time of the cloud platform and a virtual machine operating system provided by the cloud platform so as to determine whether the application requirements can be met.
The invention relates to a cloud platform real-time testing system based on network message time delay comparison, which comprises a tested cloud platform, M reference computers, a test message generator and a monitoring analyzer;
the cloud platform to be tested is a cloud platform which deploys a set number of virtual machines according to test requirements, each virtual machine is respectively provided with a required operating system which is marked as Guest1, Guest2, … and Guest N, N is the number of the virtual machines, and each virtual machine runs a multicast message receiving and responding program; when the multicast message receiving and responding program receives the multicast message sent by the test message generator, sending a response message with the same serial number to the test message generator;
the reference computers are a plurality of physical computers serving as comparison references and marked as B-Computer1, B-Computer2 and B-Computer M, M is the number of the reference computers, and M is less than or equal to N; each reference computer installs an operating system consistent with the tested virtual machine and runs a multicast message receiving and responding program; when the multicast message receiving and responding program receives the multicast message sent by the test message generator, sending a response message with the same serial number to the test message generator;
the test message generator is used for periodically sending a program of a multicast message with adjustable intervals and gradually increased serial numbers; the test message generator is separately deployed on a physical computer, or is deployed on a reference computer or a computer where the monitoring analyzer is located according to the situation;
the monitoring analyzer is a program for monitoring the multicast message; the monitoring analyzer monitors and takes in specified multicast messages, and the time delay of the virtual machines in the tested cloud platform, the test message generator and the reference computer returning the same serial number is compared after statistical analysis, so that real-time data of the virtual machines in the tested cloud platform are obtained; the monitoring analyzer is separately deployed on a physical computer or on a reference computer or a computer where the test message generator is located according to the situation.
As a specific example, the cloud platform under test includes server hardware, a cloud operating system, and a virtual machine system with a certain number and configuration.
As a specific example, the virtual machine system in the cloud platform under test is created according to application system requirements, where the application system requirements include memory size, disk capacity, an independent or shared processor core, network bandwidth, and an operating system type of the virtual machine.
As a specific example, the reference computer is a physical computer with the same configuration as the virtual machine system, that is, the physical computer is the same as the virtual machine system in memory size, disk capacity, network bandwidth, and installed operating system.
As a specific example, the multicast message receiving and responding program is a program for receiving and responding to a multicast message with an increasing sequence number and sent by a test message generator.
A cloud platform real-time testing method based on network message time delay comparison is characterized by comprising the following steps:
step 2, respectively starting multicast message receiving and responding programs in the base computers B-Computer1, B-Computer2, B-Computer and virtual machines Guest1, Guest2, … and Guest M in the tested cloud platform, and sending response messages with the same serial number to the test message generator when receiving the multicast messages sent by the test message generator;
step 3, starting a test message generator and periodically sending multicast messages, wherein the multicast messages carry sequence numbers which are sequentially increased;
and 4, when the set number of multicast messages are recorded, stopping the monitoring function of the monitoring analyzer, starting the statistical analysis function, comparing the time delay of the virtual machines in the tested cloud platform, the test message generator and the reference computer returning the same serial number, and giving real-time data of the virtual machines in the cloud platform.
As a specific example, the response packet in step 3 refers to a UDP packet with the same sequence number and replied to the sender when the virtual machine receives the multicast packet.
As a specific example, the delay in step 4 is a difference between a multicast packet with a certain sequence number sent by the external network and a timestamp of a response packet with the same sequence number returned by the virtual machine system appearing on the network switch.
As a specific example, the timestamp is obtained by snooping by a snoop analyzer.
The invention is explained in detail below with reference to the figures and with reference to embodiments.
Example 1
With reference to fig. 1, the cloud platform real-time testing system based on network message delay comparison of the present invention logically comprises five parts: the system comprises a tested Cloud Platform Cloud-Platform, a multicast message receiving and responding program Recv-Reply, M reference computers, a test message generator MultiSender and a monitoring analyzer Listen-Analysis.
The Cloud-Platform to be tested refers to a Cloud Platform which deploys a certain number of virtual machines according to test requirements, each virtual machine is respectively provided with a required operating system which is marked as Guest1, Guest2, … and Guest N, each Guest runs a multicast message receiving and responding program Recv-Reply in each Guest, and when receiving multicast messages sent by a test message generator MultiSender, the Cloud-Platform to be tested sends responding messages with the same serial number to the test message generator MultiSender;
the M reference computers are a plurality of physical computers used as comparison references, and are marked as B-Computer1, B-Computer2 and B-Computer, wherein M is the number of virtual machines needing to be tested for real-time performance, M is less than or equal to N, an operating system consistent with a certain tested virtual machine is installed according to requirements, a multicast message receiving and responding program Recv-Reply is operated on the operating system, and when a multicast message sent by a test message generator MultiSender is received, a responding message with the same sequence number is sent to the test message generator MultiSender;
the multicast message receiving and responding program Recv-Reply is a program for receiving and responding the multicast message which is sent by the test message generator and has the serial number which is increased progressively;
the MultiSender is a program used for periodically sending multicast network messages, sends multicast messages with adjustable intervals and increasing sequence numbers, can be independently deployed on a physical computer, and can also be deployed on a reference computer or a Listen-Analysis computer according to conditions;
the monitoring analyzer Listen-Analysis is a program used for monitoring network messages, monitors and logs specified multicast messages, counts and analyzes the time delay of returning the same serial number of the virtual machine Guest i, the test message generator MultiSender and the reference computer B-computer, gives real-time data of the virtual machine Guest i in the cloud platform, and can be independently deployed on a physical computer or a computer where the monitoring analyzer Listen-Analysis is located according to conditions.
Preferably, the tested Cloud Platform Cloud-Platform system configuration adopts software and hardware configuration consistent with a real application system, and comprises server hardware, a Cloud operating system and virtual machine systems with determined quantity and configuration; an appropriate number of virtual machines may be created as needed and the desired operating system installed. Furthermore, the virtual machine system is created according to the requirements of the application system; the application system requirements comprise the memory size, the disk capacity, the independent or shared processor core, the network bandwidth and the operating system type of the virtual machine.
Preferably, the reference computer B-computer adopts the same or substantially the same hardware configuration as the virtual machine to be compared, that is, the physical computer is the same as the system memory size, disk capacity, network bandwidth, and installed operating system of the virtual machine to be tested.
Preferably, the MultiSender runs on an independent physical computer, the interval for sending messages is allowed to be adjusted, and the adjustment unit can reach millisecond level; the byte occupied by the serial number of the message is recommended to be not less than 4 bytes, and the serial number is increased by sequentially adding 1 from 1;
preferably, the listening analyzer Listen-Analysis runs on a separate physical computer, and may directly use a network listening tool to Listen to all reply messages sent to the MultiSender.
The invention relates to a cloud platform real-time testing method based on network message time delay comparison, which comprises the following steps:
step 2, starting multicast message receiving and answering programs respectively in the base computers B-Computer1, B-Computer2, B-Computer and virtual machines Guest1, Guest2, … and Guest M in the tested cloud platform, receiving the multicast message with the sequence number from the test message generator by the multicast message receiving and answering programs, and returning the answering message with the same sequence number by adopting a UDP protocol, so as to realize a flow chart as shown in FIG. 2; the format of the multicast message receiving and response program return message is shown in table 1; when receiving the multicast message sent by the test message generator, sending a response UDP message with the same sequence number to the test message generator;
TABLE 1B-Computeri and Guesti network loopback packet formats
| Identification word of response message | Sequence number of reply message | End of test flag |
| 2 bytes | 4 bytes | 2 bytes |
And 3, installing a Linux operating system in the test message generator, and deploying a MultiSender, wherein the MultiSender comprises two subprograms of sendPrg and recvPrg. sendPrg is used for sending multicast messages with sequence numbers to the tested virtual machine and the reference computer, and a flow chart is shown in fig. 3; recvPrg receives the UDP reply message sent back from the tested computer and the reference computer, and the flowchart is shown in fig. 4; the multicast message format is shown in table 2; starting a test message generator to periodically send multicast messages, wherein the multicast messages carry sequence numbers which are sequentially increased;
table 2 test message generator program multicast message format
| Multicast message identifier | Multicast message sequence number | End of test flag |
| 2 bytes | 4 bytes | 2 bytes |
Step 4, when a certain number of multicast messages are recorded, stopping the monitoring function of the monitoring analyzer, and starting a message deployment time delay analysis program analysis; the analysis reads and filters the monitored message data, only the response message returned to the MultiSender by the tested virtual machine and the reference computer and the multicast message sent by the MultiSender are reserved, the time difference of the messages with the same sequence number returned by the tested cloud platform virtual machine and the reference computer, the time difference of the messages returned by the tested cloud platform virtual machine and the multicast messages with the same sequence number sent by the test message generator and the time difference of the messages returned by the reference computer and the multicast messages with the same sequence number sent by the test message generator are compared one by one, and the flow chart is shown in fig. 5, so that the real-time data of the virtual machine in the cloud platform is obtained.
Furthermore, the multicast message refers to a multicast message which is sent by the test message generator and has a sequence number and the sequence number is increased; the response message refers to a UDP message with the same sequence number replied to the sender when the virtual machine system receives the multicast message.
Furthermore, the delay refers to a difference between a multicast message with a certain sequence number sent by an external network and a timestamp of a response message with the same sequence number returned by the virtual machine system appearing on the network switch; the time stamp is obtained by monitoring of the monitoring analyzer.
In summary, the invention provides a practical and simple cloud platform and a virtual machine system real-time testing method based on the control system cloud computing technology application architecture and the cloud platform real-time connotation, and can provide strong support for the control system to evaluate whether the control system can be migrated to the cloud platform or not and select a proper cloud product.
Claims (7)
1. A cloud platform real-time testing system based on network message time delay comparison is characterized by comprising a tested cloud platform, M reference computers, a test message generator and a monitoring analyzer;
the cloud platform to be tested is a cloud platform for deploying a set number of virtual machines according to test requirements, each virtual machine is respectively provided with a required operating system which is marked as Guest1, Guest2, … and Guest N, N is the number of the virtual machines, and each virtual machine runs a multicast message receiving and responding program; when the multicast message receiving and responding program receives the multicast message sent by the test message generator, sending a response message with the same serial number to the test message generator;
the reference computers are a plurality of physical computers serving as comparison references and marked as B-Computer1, B-Computer2 and B-Computer M, M is the number of the reference computers, and M is less than or equal to N; each reference computer installs an operating system consistent with the tested virtual machine and runs a multicast message receiving and responding program; when the multicast message receiving and responding program receives the multicast message sent by the test message generator, sending a response message with the same serial number to the test message generator;
the test message generator is used for periodically sending a program of a multicast message with adjustable intervals and gradually increased serial numbers; the test message generator is separately deployed on a physical computer, or is deployed on a reference computer or a computer where the monitoring analyzer is located according to the situation;
the monitoring analyzer is a program for monitoring the multicast message; the monitoring analyzer monitors and logs in specified multicast messages, and after statistical analysis, the time difference of messages with the same sequence number sent back by the cloud platform virtual machine to be tested and the reference computer, the time difference of messages sent back by the cloud platform virtual machine to be tested and multicast messages with the same sequence number sent by the test message generator, and the time difference of messages sent back by the reference computer and multicast messages with the same sequence number sent by the test message generator are compared one by one to obtain real-time data of the virtual machine in the cloud platform to be tested; the monitoring analyzer is separately deployed on a physical computer or on a reference computer or a computer where the test message generator is located according to the situation.
2. The cloud platform real-time testing system based on network message delay comparison of claim 1, wherein the cloud platform under test comprises server hardware, a cloud operating system, and a certain number and configuration of virtual machine systems.
3. The cloud platform real-time testing system based on network message delay comparison as claimed in claim 2, wherein the virtual machine system in the cloud platform under test is created according to application system requirements, and the application system requirements include memory size, disk capacity, an independent or shared processor core, network bandwidth, and operating system type of the virtual machine.
4. The cloud platform real-time testing system based on network message delay comparison as claimed in claim 3, wherein the reference computer is a physical computer configured the same as the virtual machine system, that is, a physical computer with the same memory size, disk capacity, network bandwidth, and installation operating system as the virtual machine system.
5. The cloud platform real-time testing system based on network message delay comparison of claim 3, wherein the multicast message receiving and responding program is a program for receiving and responding the multicast messages with increasing sequence numbers sent by the test message generator.
6. A cloud platform real-time testing method based on network message time delay comparison based on the system of any one of claims 1 to 5 is characterized by comprising the following steps:
step 1, starting a monitoring analyzer, and monitoring and recording an appointed multicast message;
step 2, respectively starting multicast message receiving and responding programs in the base computers B-Computer1, B-Computer2, B-Computer and virtual machines Guest1, Guest2, … and Guest M in the tested cloud platform, and sending response messages with the same serial number to the test message generator when receiving the multicast messages sent by the test message generator;
step 3, starting a test message generator and periodically sending multicast messages, wherein the multicast messages carry sequence numbers which are sequentially increased;
and 4, stopping the monitoring function of the monitoring analyzer when a set number of multicast messages are recorded, starting a statistical analysis function, comparing the time difference of messages with the same sequence number sent back by the tested cloud platform virtual machine and the reference computer, the time difference of the messages sent back by the tested cloud platform virtual machine and the multicast messages with the same sequence number sent by the test message generator, and the time difference of the messages sent back by the reference computer and the multicast messages with the same sequence number sent by the test message generator one by one, and giving real-time data of the virtual machines in the cloud platform.
7. The method for testing the real-time performance of the cloud platform based on the network message delay comparison as claimed in claim 6, wherein the response message in the step 2 is a UDP message with the same sequence number replied to the sender when the virtual machine receives the multicast message.
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| JP2014056335A (en) * | 2012-09-11 | 2014-03-27 | Nec Commun Syst Ltd | Virtual machine arrangement system and virtual machine arrangement method, and computer program |
| CN107996023A (en) * | 2016-11-23 | 2018-05-04 | 华为技术有限公司 | Monitor method, equipment and the Virtual Networking System of virtual network |
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| JP2014056335A (en) * | 2012-09-11 | 2014-03-27 | Nec Commun Syst Ltd | Virtual machine arrangement system and virtual machine arrangement method, and computer program |
| CN107996023A (en) * | 2016-11-23 | 2018-05-04 | 华为技术有限公司 | Monitor method, equipment and the Virtual Networking System of virtual network |
| CN108243072A (en) * | 2016-12-26 | 2018-07-03 | 阿里巴巴集团控股有限公司 | A kind of method and apparatus for carrying out network delay monitoring |
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