CN103530247A - Inter-node bus accessing priority deploying method based on multiple servers - Google Patents

Abstract

The invention provides a priority allocation method based on bus access among multiple server nodes. First, according to the bus communication requirements of the server nodes, the key physical signals participating in the bus communication logic are grouped and integrated using a programmable logic controller; The initial monitoring of high-speed data transmission; the time sequence of the bus signal, the actual value of the trigger priority requirements and other actual values are matched with the requirements in the DSP. The principle is that the bus is idle. Nodes are switched and connected sequentially; when the bus is busy, in addition to considering the natural ordering, the judgment of the waiting time is also added, and the nodes with a longer waiting time are given priority to access the bus communication; the time sequence and trigger requirements of each bus signal are adopted. DSP software language implementation; the programmable logic controller transmits the collected bus communication signals to the DSP data processing center, and the DSP judges the actual values such as the time sequence and trigger requirements of the participating signals according to the pre-scheduled requirements, and then gives the judgment Whether it meets the requirements of bus switching and achieves a balanced allocation of resources.

Description

A Priority Allocation Method Based on Bus Access Between Multi-Server Nodes

technical field

The present invention relates to the field of computer communication, and specifically uses a priority allocation method based on bus access between multi-server nodes to solve the problem that the server system cannot communicate according to the current node-to-point communication data transmission process between the current server system nodes. , Real-time automatic deployment of computing resources when the bus is idle. The method ensures the real-time performance, reliability and stability of server node communication.

Background technique

Today's server systems often require multiple server nodes to cooperate to complete computing tasks, and the data and management channels between multiple server nodes are usually mounted and communicated equally on the bus. The server needs long-term uninterrupted operation and stability, and the reliability requirements of node communication are constantly increasing. In order to ensure the stable data transmission between server node systems, in the process of using the server motherboard, a stable and effective bus priority allocation method is required to strictly control the system. Bus time domain segmentation, especially the effective allocation of bus priority in the process of multi-node cooperation is particularly important.

The stable transmission of data between server node systems requires the bus to respond to the communication needs of nodes in a timely manner as much as possible, and the second is that the nodes in communication cannot be affected by other node bus requests to maintain the integrity of the data transmission of the node. Any difference in timing will cause system initialization problems and other derivative problems. Therefore, the monitoring of stable data transmission between server node systems must also be included in the reliability test, so as to better realize the logical timing function of the entire server multi-node computing system. high reliability.

In the process of data transmission between nodes in the current server system, the server nodes are generally numbered, and the premise is that the number of the destination node for data transmission must be known before effective data transmission can be formed. For this one-to-one point-to-point directional communication, the server system cannot automatically allocate computing resources in real time according to the node and bus idle conditions. For the cooperation requests sent by other nodes with heavy loads, the currently sent node server may also be in a heavy load state. Therefore, There will be no communication response for a long time, and other nodes in the system will enter the idle state because there is no task to execute. This process can only rely on the normal task processing flow and task waiting of the server node's own system to complete the cooperation between nodes. It is impossible to achieve an effective balance for the computing performance of the whole machine. For the problem that the data sent by the node cannot be responded to for a long time, it cannot be effectively and automatically forwarded to other nodes, and thus it cannot effectively realize the overall management of server resources. For the above problems, through in-depth analysis, We summarize a priority allocation method based on bus access among multi-server nodes.

Contents of the invention

The present invention is based on the timing theory of bus communication, and uses a priority allocation method based on bus access between multi-server nodes to solve the problem that the server system cannot Automatically allocate computing resources in real time according to the idle conditions of nodes and buses.

The purpose of the present invention is achieved in the following manner, including:

①According to the real-time and integrity requirements of multi-server node bus access, the physical signals of each server node participating in the data transmission corresponding to the logic bus are summarized, and the programmable logic controller is used for group integration, and the parallel high-speed transmission initial monitoring is carried out;

②In the programmable logic controller, group the physical signals of the logical bus of the integrated nodes according to the nodes, and give each group a natural value representing the priority of the bus processing right, that is, the natural number code representing the order of the priority of the processing right ; At the same time, each group is given a processing right waiting count value, which is the numerical code representing the bus waiting time of each group. By default, the value is initially assigned to 0, and all nodes are consistent;

③The programmable logic controller transmits the collected bus transmission request signal and the value of the bus waiting time to the DSP data processing center, and the DSP follows the natural ordering requirements of the pre-set priority of bus processing rights, and at the same time combines the judgment of the bus waiting time , analyze the actual values such as the time sequence and trigger priority requirements of the bus signals between the server nodes participating in the communication, and then judge the bus signals of the server nodes that need to switch the response urgently at present, so as to meet the real-time requirements of the bus communication;

Specific steps are as follows:

a) Firstly, according to the server node bus communication requirements, the key physical signals involved in the bus communication logic are grouped and integrated by the programmable logic controller; at the same time, the high-speed data transmission start monitoring of each node is carried out in parallel;

b) The timing of the bus signal, trigger priority requirements and other actual values are matched with the requirements to be built into the DSP. The principle is that when the bus is idle, in order to ensure the real-time performance of data response, the bus is sequentially switched among the nodes according to the natural order. When the bus is busy, in addition to considering the natural ordering, the judgment of the waiting time is also added, and the nodes with a longer waiting time are preferentially connected to the bus communication; the time sequence and trigger requirements of each bus signal are implemented using DSP software language;

c) The programmable logic controller transmits the collected bus communication signals to the DSP data processing center, and the DSP judges the actual values such as the time sequence and trigger requirements of each participating signal according to the pre-sequence requirements, and then gives a judgment whether the bus is satisfied Switching requirements to achieve a balanced allocation of resources.

According to the priority allocation method based on bus access between multi-server nodes, according to the real-time and integrity requirements of multi-server node bus access, the physical signals of each server node participating in data transmission corresponding to the logical bus are summarized, and programmable logic control is adopted. The PLC performs group integration on the parallel high-speed transmission start monitoring; the programmable logic controller performs group integration according to the main channel bus signals of the nodes participating in the communication, that is, the bus key channel signals are concentrated on the programmable logic controller end, and the programmable logic controller The device side uses array variables to correspond to the bus signals in a single node to ensure the synchronous switching of signal operations in a single node; the programmable logic controller performs compatible conversion of the bus level at the same time to realize the compatibility and self-adaptation of the bus level between nodes, so as to realize Collection of bus communication information for multiple server nodes.

According to the priority allocation method based on multi-server inter-node bus access, in the programmable logic controller, the logical bus physical signals of the integrated access nodes are grouped according to nodes, and each group is given a representative bus processing right priority The natural value of , that is, the natural number code that represents the priority order of the processing right; at the same time, each group is given a processing right waiting count value, that is, the numerical code that represents the bus waiting time of each group, that is, the bus signal of each node has a priority Coding and response waiting time coding, which is also a necessary condition for judging bus switching; priority coding is sorted by natural numbers, the smaller the value, the higher the priority, and the coding of response waiting time is carried out by integer counting, and the larger the value means waiting the longer the time.

In the priority allocation method based on bus access between multi-server nodes, the programmable logic controller transmits the collected transmission request signal of the bus and the value of the bus waiting time to the DSP data processing center, and the DSP processes the data according to the pre-set bus processing right. The natural ordering requirements of the priority, combined with the judgment of the bus waiting time, analyze the time sequence of the bus signals between the server nodes participating in the communication, the trigger priority requirements and other actual values. The principle is that the bus is idle, in order to ensure the data response. Real-time, the bus is sequentially switched and connected among the nodes according to the natural order; when the bus is busy, in addition to considering the natural order, the judgment of the waiting time is also added, and the nodes with a longer waiting time are preferentially connected to the bus communication; DSP as The control center for centralized bus management records at the same time the specific responses between the buses together with the time during the bus switching operation, and compares them with the set standard values. When the actual value deviates from the standard value, a node occupies the bus for a long time, and the load When there is a serious imbalance, alarm and upload records to achieve real-time and automatic monitoring.

The excellent effect of the present invention: use the priority allocation method based on bus access between multi-server nodes to solve the problem that in the current one-to-one point-to-point directional communication data transmission process between the nodes of the server system, the server system cannot real-time according to the node and bus idle conditions Automatic allocation of computing resources.

Description of drawings

Fig. 1 is a flow chart of the priority allocation method.

Detailed ways

The present invention is described in detail below with reference to the accompanying drawings.

This method ensures the real-time performance, reliability and stability of server node communication, and the specific invention content can be divided into the following four aspects:

①According to the real-time and integrity requirements of multi-server node bus access, the physical signals of each server node participating in the data transmission corresponding to the logical bus are summarized, and the programmable logic controller is used for group integration, and the parallel high-speed transmission initial monitoring is carried out;

②In the programmable logic controller, group the physical signals of the logical bus of the integrated nodes according to the nodes, and give each group a natural value representing the priority of the bus processing right, that is, the natural number code representing the order of the priority of the processing right ; At the same time, each group is given a processing right waiting count value, which is the numerical code representing the bus waiting time of each group. By default, the value is initially assigned to 0, and all nodes are consistent;

③The programmable logic controller transmits the collected bus transmission request signal and the value of the bus waiting time to the DSP data processing center, and the DSP follows the natural ordering requirements of the pre-set priority of bus processing rights, and at the same time combines the judgment of the bus waiting time , analyze the actual values such as the time sequence and trigger priority requirements of the bus signals between the server nodes participating in the communication, and then judge the bus signals of the server nodes that need to switch the response urgently at present, so as to meet the real-time requirements of the bus communication;

According to the real-time and integrity requirements of multi-server node bus access, the physical signals of each server node participating in the data transmission corresponding to the logical bus are summarized, and the programmable logic controller is used for group integration and parallel high-speed transmission initial monitoring; The programmable logic controller performs group integration according to the main channel bus signals of the nodes participating in the communication, that is, the bus key channel signals are concentrated on the programmable logic controller side, and the programmable logic controller side uses array variables to correspond to the bus signals in a single node. Guarantee the synchronous switching of signal operation in a single node; the programmable logic controller performs compatible conversion of the bus level at the same time, and realizes the compatibility and self-adaptation of the bus level between nodes, so as to realize the collection of bus communication information of multiple server nodes;

In the programmable logic controller described above, the physical signals of the logic bus of the integrated nodes are grouped according to nodes, and each group is given a natural value representing the priority of the bus processing right, that is, the order of priority of the priority of the processing right Natural number coding; at the same time, each group is given a processing right waiting count value, which is the numerical code representing the bus waiting time of each group. That is, for the bus signal of each node, there are priority codes and response waiting time codes, which are also necessary conditions for judging bus switching; the priority codes are sorted by natural numbers, and the smaller the value, the higher the priority. The encoding of the response waiting time is carried out in the form of integer counting, and the larger the value, the longer the waiting time.

The programmable logic controller transmits the collected transmission request signal of the bus and the value of the bus waiting time to the DSP data processing center. Judgment of the size, analysis of the time sequence of the bus signals between the server nodes participating in the communication, trigger priority requirements and other actual values, the principle is the idle phase of the bus, in order to ensure the real-time response of data, the bus is naturally sorted among the nodes Switching on; when the bus is busy, in addition to considering the natural ordering, the judgment of the waiting time is also added, and the node with a longer waiting time is preferentially connected to the bus communication; During the process, the specific response between each bus, together with the time, is compared with the set standard value. When the actual value deviates from the standard value, a node occupies the bus for a long time, and when the load is seriously unbalanced, it will alarm and upload records to achieve Real-time monitoring and automation.

Example

1) The R&D engineers first group and integrate the key physical signals involved in the bus communication logic with programmable logic controllers according to the bus communication requirements of the server nodes; at the same time, the initial monitoring of high-speed data transmission of each node is carried out in parallel;

2) The time sequence of the bus signal, the trigger priority requirements and other actual values are matched with the requirements to be built into the DSP. The principle is that the bus is idle. In order to ensure the real-time performance of the data response, the bus is sequentially switched among the nodes according to the natural order. When the bus is busy, in addition to considering the natural ordering, the judgment of the waiting time is also added, and the nodes with a longer waiting time are preferentially connected to the bus communication; the time sequence and trigger requirements of each bus signal are implemented using DSP software language;

3) The programmable logic controller transmits the collected bus communication signals to the DSP data processing center, and the DSP judges the actual values such as the time sequence and trigger requirements of each participating signal according to the pre-scheduled requirements, and then gives a judgment whether to meet the requirements of the bus Switching requirements to achieve a balanced allocation of resources.

After the detailed implementation above, we can conveniently perform bus communication switching operations of multiple nodes under the system, which not only meets the real-time requirements of bus communication, but also saves the cost of bus interconnection, improves the efficiency of collaborative work between nodes, and improves the system Configuration reliability and stability.

Claims (4)

1. the right of priority concocting method based on bus access between multiserver node, is characterized in that content comprises:

1. according to multiserver node bus access real-time and integrality requirement, the physical signalling that each server node is participated in to data transmission counterlogic bus gathers, adopt programmable logic controller (PLC) to divide into groups to integrate, carry out parallel high-speed and transmit initial monitoring;

2. in programmable logic controller (PLC), to integrating the node logic bus physical signalling of access, by node, divide into groups, and give the natural numerical value that respectively divides into groups one to represent bus disposal right priority, represent the natural number coding of disposal right priority size sequence; Give the disposal right of respectively dividing into groups simultaneously and wait for count value, represent the numeric coding of each packet bus stand-by period, give tacit consent to this value and initially give 0, and all nodes are consistent;

3. programmable logic controller (PLC) is sent to DSP data processing centre (DPC) by the transfer request signal of the bus collecting, the numerical value of bus stand-by period, DSP is according to the natural ordering requirement of bus disposal right priority in advance, simultaneously in conjunction with the judgement to the bus stand-by period, the actual value such as the time order and function of bus signals, the requirement of triggering priority between server node of each participation communication of analysis, and then judge the server node bus signals of current urgent need handoff response, meet the requirement of real-time of bus communication;

Concrete steps are as follows:

A), first according to the requirement of server node bus communication, the physical signalling that key is participated in to bus communication logic adopts programmable logic controller (PLC) to divide into groups to integrate; The initial monitoring of high speed data transfer of each node walks abreast simultaneously;

B) actual values such as the time order and function of bus signals, the requirement of triggering priority are coordinated to requirement built-in realization in DSP, principle is bus idle phase, is the real-time that guarantees data response, and bus is sequentially switched connection between each node according to natural ordering; When bus is busy, except considering, natural ordering, also to have added the judgement of stand-by period, the node priority access bus communication that the stand-by period is larger; The time order and function, the triggering that are about to each bus signals require to adopt dsp software language to realize;

C) programmable logic controller (PLC) is sent to DSP data processing centre (DPC) by the bus communication signal collecting, DSP is according to sequential requirement in advance, the actual values such as the time order and function of each signal participating in of judgement, triggering requirement, and then provide and judge whether to meet bus switch requirement, reach the equilibrium allocation of resource.

2. the right of priority concocting method based on bus access between multiserver node according to claim 1, it is characterized in that, according to multiserver node bus access real-time and integrality requirement, the physical signalling that each server node is participated in to data transmission counterlogic bus gathers, adopt programmable logic controller (PLC) to divide into groups to integrate, carry out parallel high-speed and transmit initial monitoring; Programmable logic controller (PLC) divides into groups to integrate according to the primary path bus signals of the participation communication of node, be about to the crucial path signal of bus and focus on programmable logic controller (PLC) end, programmable logic controller (PLC) end adopts the bus signals in the corresponding single node of array variable, guarantees the synchronous switching of signal operation in single node; Programmable logic controller (PLC) carries out the rough set theory of bus level simultaneously, realizes the compatible self-adaptation of internodal bus level, to realize the collection of a plurality of server node bus communication information.

3. the right of priority concocting method based on bus access between multiserver node according to claim 1, it is characterized in that in programmable logic controller (PLC), to integrating the node logic bus physical signalling of access, by node, divide into groups, and give the natural numerical value that respectively divides into groups one to represent bus disposal right priority, represent the natural number coding of disposal right priority size sequence; Give the disposal right of respectively dividing into groups simultaneously and wait for count value, represent the numeric coding of each packet bus stand-by period,, there is the coding of precedence level code and response wait time in the i.e. bus signals to each node, this is also the necessary condition of judgement bus switch; Precedence level code adopts natural number sequence, and the less priority of numerical value is higher, and the coding of response wait time adopts the mode of integer counting to carry out, and the time that the larger expression of numerical value has been waited for is longer.

4. the right of priority concocting method based on bus access between multiserver node according to claim 1, it is characterized in that, programmable logic controller (PLC) is by the transfer request signal of the bus collecting, the numerical value of bus stand-by period is sent to DSP data processing centre (DPC), DSP is according to the natural ordering requirement of bus disposal right priority in advance, simultaneously in conjunction with the judgement to bus stand-by period size, analyze the time order and function of bus signals between each server node that participates in communication, trigger the actual values such as priority requirement, principle is bus idle phase, for guaranteeing the real-time of data response, bus is switched and is connected according to natural ordering order between each node, when bus is busy, except considering, natural ordering, also to have added the judgement of stand-by period, the node priority access bus communication that the stand-by period is larger, DSP is as the control center that concentrates bus management, be recorded in bus switch operational process simultaneously, concrete response between each bus is together with the time, compare with the standard value of setting, when actual value departs from standard value, certain node takies bus for a long time, and load is serious when unbalanced, report to the police and upload record, accomplishing real-time, the robotization of monitoring.