CN104951385A - Channel health state recording device of dynamic reconfigurable bus monitoring system - Google Patents
Channel health state recording device of dynamic reconfigurable bus monitoring system Download PDFInfo
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Abstract
A channel health state recording device of a dynamic reconfigurable bus monitoring system is characterized by comprising a channel detection and recognition module, a row and column mapping module, a three-dimensional channel table storage device, a channel data organization module and a communication data buffer storage device, and channel health states of pairwise nodes on a dynamic reconfigurable bus are stored and managed according to channel health state storage tables of three dimensions including row nodes, column nodes and channels.
Description
Technical field
The present invention relates to passage health status pen recorder in a kind of embedded system bus monitoring system, particularly relate to the passage health status pen recorder in a kind of dynamic reconfigurable bus.
Background technology
Dynamic reconfigurable bus (UM-BUS) is the high-speed serial bus of a kind of bus type topological structure based on M-LVDS defined for highly reliable Embedded Application occasion, as shown in Figure 1, adopt bus type topological structure, support multinode direct interconnection, 32 passage concurrently-transmitted datas can be used at most.If some passage breaks down, bus controller can detect in real time, Data Dynamic is assigned on the effective passage of residue and transmits, realize dynamic restructuring, carry out dynamic fault-tolerant to communication failure.
The Communication Protocol Model of UM-BUS bus as shown in Figure 2, is followed successively by processing layer, data link layer, Physical layer from top to bottom.Wherein processing layer is responsible for management to whole bus, protocol encapsulation and the conversion to upper layer application interface.Data link layer is divided into again transmission sublayer and media access control sublayer two parts, divides into groups and dynamic restructuring to data according to existing active line in transmission sublayer.The information of active line is provided by link detecting by media access control sublayer.Physical layer is the bottom of agreement, and it provides transmission medium and interconnect equipment for data communication, achieves the physical connection of network, completes the functions such as serioparallel exchange, 8b/10b encoding and decoding, clock synchronous, for bus provides reliable communication infrastructure.
UM-BUS bus adopts the communication pattern of principal and subordinate's command response, carries out information interaction by the form of packet.Node in bus can be divided into host node by function difference, from node and supervision node, one time communication process can only be initiated by host node and respond by from node, monitors that node is for monitoring the communication process in bus.As shown in Figure 3, during data communication, at transmitting terminal, processing layer obtains data from high-level interface and is stored into data buffer, packet dynamic equalization is assigned on effective passage by the active line information provided according to media access control sublayer in transmission sublayer, after integrated data is packed by Physical layer, be encoded into bit stream through 8b/10b and be sent on link.At receiving end, after the data received are carried out clock synchronous, 8b/10b decoding, serioparallel exchange by Physical layer, channel data is unpacked, data are carried out dynamic organization and are stored in data buffer by the active line information then provided according to media access control sublayer in transmission sublayer, finally give application layer process by processing layer.
UM-BUS bus adopts " order-response-confirm " syllogic channel failure detection algorithm, after the reset or when breaking down, is started carry out bus run health status testing process to from node by host node.As shown in Figure 4, Air conduct measurement process is divided into three phases from the time: 1. sense command transmission phase, and host node sends sense command bag to detected from node from all bus runs, starts Air conduct measurement process; 2. detected state acknowledgment phase, detected receives the bus run of sense command from node from all, detects response packet to the host node loopback initiating to detect; 3. testing result the stage of recognition, host node, again from all passages receiving detection response packet, confirms to wrap to detected detecting from node transmission.For host node, can receive the passage detecting response packet is healthy passage; For from node, detection can be received and confirm that the passage of bag is healthy passage.Host node does not receive the detection response packet from node at the appointed time, or does not receive the detection confirmation bag of host node from node, and all think that testing process is overtime, passage is unavailable.After Air conduct measurement completes, master and slave two nodes participating in testing process upgrade respective passage health status table respectively according to Detection Information bag reception condition.
Health status management in the master and slave node of UM-BUS bus, based on the communicating requirement of node-to-node, adopts the two-dimentional forms mode as table 1, can provide the applicable of the passage between this node and any one node to transmission sublayer.In table 1, often the corresponding bus node of row, represents the passage applicable between it and this node, often the corresponding communication port of row, and the health status X of memory channel, X are that 0 expression passage is unavailable, are that 1 expression passage can be used.
The passage health status table of table 1 node
UM-BUS bus monitoring node is pressed in the topological structure mounting bus shown in Fig. 1, monitor log is carried out to activities such as the communication in bus, detections, and the bus activity information of record is sent to background processor and carry out classifying, analyzing, make bus user can grasp the working condition of each node device of bus all sidedly, facilitate debugging and the case study of bus application system.Bus monitoring node only carries out monitor log to the activity in bus, can not to bus sending information.The core of bus monitoring node is by a bus monitoring System's composition, its function monitors passages all in bus, the order of various communication process, testing process and other active procedure in acquisition and recording bus, state, the communication information and the operating state data such as data and time.
Bus monitoring system in the course of the work, need according to the snoop results to bus run, passage health status table between the master and slave node related to according to bus communication process, communication data on bus run is organized, extract original communication data packet, record is carried out to communications command, state and data etc.Complete bus run Organization of Data, bus monitoring system just must can obtain communicating pair internodal passage health status table, but the master and slave node that bus monitoring system cannot relate to from communication process in snoop procedure obtains their respective passage health status information.This just requires that bus monitoring system can be monitored bus run testing process, according to snoop results, the passage health status set up voluntarily in bus between each node stores form, carries out record, for when recovering bus communication packets of information in snoop procedure to bus run health status.Simultaneously, because the passage health status of UM-BUS bus is based on node-to-node, this makes the two-dimensional channel health status form that cannot use in bus monitoring system in master and slave communication node, otherwise, monitoring system carries out monitoring tissue demand to communication information bag between any two communication nodes cannot be met.
Summary of the invention
To the object of the invention is to design in a kind of dynamic reconfigurable bus monitoring system passage health status pen recorder between bus node, record can be carried out to the passage health status between nodes all on dynamic reconfigurable bus, and Organization of Data and the recovery of communication information bag can be used for when bus communication process is monitored.
For achieving the above object, the technical solution adopted in the present invention is:
A passage health status pen recorder for dynamic reconfigurable bus monitoring system, is characterized in that: described passage health status pen recorder comprises Air conduct measurement identification module, ranks mapping block, three-dimensional channel table storer, channel data molded tissue block and communication data memory buffer.
Further, described Air conduct measurement identification module is used for monitoring the Air conduct measurement process of dynamic reconfigurable bus, when monitoring an Air conduct measurement process, generating the source node number of Air conduct measurement, destination node number, passage health status word and Air conduct measurement settling signal according to the Detection Information bag that monitors and giving ranks mapping block.
Further, described ranks mapping block is for generating reference address and the control signal of three-dimensional channel table storer, when receiving the Air conduct measurement settling signal that Air conduct measurement identification module is sent here, the source node sent here by Air conduct measurement identification module number is as the row node address of left mouth, destination node number as the row node address of left mouth, passage health status word from left mouth write three-dimensional channel table storer; Destination node that Air conduct measurement identification module is sent here number as the row node address of right mouth, source node number as the row node address of right mouth, passage health status word simultaneously from right mouth write three-dimensional channel table storer.
Further, described three-dimensional channel table storer is a dual-ported memory, be used for storing all nodes passage health status between any two on dynamic reconfigurable bus, it is left, the valid data width of right two ports is identical with the number of channels of dynamic reconfigurable bus, left, the significant address bit of right output port is divided into row node address and row node address two parts, each data word represents the passage health status between corresponding row node and row node, a passage of each corresponding dynamic reconfigurable bus, form row node, the passage health status of row node and passage three dimensions stores form.
Further, described communication data memory buffer is used in dynamic reconfigurable bus monitoring system, store the bus communication information and bus Detection Information that listen to.
Further, described channel data molded tissue block is used for monitoring dynamic reconfigurable bus, whenever listening to a bus communication process, ranks mapping block is given by the source node of the communication information bag listened to number, destination node number, ranks mapping block using this source node number and destination node number as row node address and row node address, from any one port fetch channel health status word of three-dimensional channel table storer, give channel data molded tissue block; Channel data molded tissue block reads communication data according to this passage health status word from available bus run, and composition communication information bag, adds after comprising the information of timing code, be stored in communication data memory buffer.
Further, Detection Information, also for when monitoring an Air conduct measurement process, being formed Detection Information bag, being stored in communication data memory buffer by described Air conduct measurement identification module together with the information comprising timing code.
Passage health status pen recorder in the dynamic reconfigurable bus monitoring system that the present invention realizes solves dynamic reconfigurable bus monitoring system to the collection of bus node passage health status between any two, record and use problem, carries out real-time, complete monitor log provide technical guarantee for monitoring system to bus communication activity.
Accompanying drawing explanation
Fig. 1 is the topology diagram of UM-BUS bus;
Fig. 2 is UM-BUS bus protocol hierarchical model figure;
Fig. 3 is UM-BUS bus data transfer process and data path schematic diagram;
Fig. 4 is UM-BUS bus run fault detection method schematic diagram;
Fig. 5 is the passage health status recording device structure figure in dynamic reconfigurable bus monitoring system;
Fig. 6 is the three-dimensional storage space schematic diagram of passage health status.
Embodiment
As shown in Figure 1, dynamic reconfigurable bus (UM-BUS) adopts the bus type topological structure based on the multi-channel intelligent dynamic redundancy of M-LVDS, and support maximum 30 communication node direct interconnection, node serial number is 1 ~ 30, and numbering 0 and 31 retains; Use maximum 32 passage concurrently-transmitted datas, each channel number is 0 ~ 31; During two node communications, if a certain passage breaks down, by passage dynamic redundancy and failure reconfiguration technology automatic shield faulty channel, only on healthy passage, carry out exchanges data.
UM-BUS adopts master-slave response mode, with the form interactive information of packet between node.Node in bus can be divided into host node, from node and supervision node by function difference.One time communication process by host node by starting to sending order bag from node, can only terminate by from node loopback respond packet.Monitor that node is for monitoring the communication process in bus.
As shown in Figure 3, during data communication, at transmitting terminal, processing layer obtains data from high-level interface and is stored into data buffer, packet dynamic equalization is assigned on effective passage by the active line information provided according to media access control sublayer in transmission sublayer, is encoded into bit stream is sent on link after integrated data is packed by Physical layer through 8b/10b.At receiving end, channel data unpacks after the data received being carried out clock synchronous, 8b/10b decoding, serioparallel exchange by Physical layer, then in the passage health status information that transmission sublayer provides according to media access control sublayer, data on all effective passages are carried out dynamic organization, form communication data packet (order bag or respond packet), and be stored in data buffer, finally give application layer process by processing layer.
After the reset, all host nodes in UM-BUS bus can adopt in turn " order-response-confirm " syllogic channel failure detection algorithm, the detection of passage health status is carried out one by one to other all node of bus.As shown in Figure 4, Air conduct measurement process is divided into three phases from the time: 1. sense command transmission phase, and host node sends sense command bag to detected from node from all bus runs, starts Air conduct measurement process; 2. detected state acknowledgment phase, detected receives the bus run of sense command from node from all, detects response packet to the host node loopback initiating to detect; 3. testing result the stage of recognition, host node, again from all passages receiving detection response packet, confirms to wrap to detected detecting from node transmission.For host node, can receive the passage detecting response packet is healthy passage; For from node, detection can be received and confirm that the passage of bag is healthy passage.Host node does not receive the detection response packet from node at the appointed time, or does not receive the detection confirmation bag of host node from node, and all think that testing process is overtime, passage is faulty channel, unavailable.After Air conduct measurement completes, master and slave two nodes participating in testing process upgrade respective passage health status table respectively according to Detection Information bag reception condition.
UM-BUS bus monitoring node is articulated in bus, carries out monitor log to activities such as the communication in bus, detections, and the bus activity information of record is sent to background processor and carry out classifying, analyzing.Bus monitoring node only carries out monitor log to the activity in bus, can not to bus sending information.Bus monitoring node is made up of bus monitoring system, communication data memory buffer, transmission control module and background process computing machine usually.Bus monitoring system is responsible for monitoring passages all in bus, these information are recorded in communication data memory buffer by the order of various communication process, testing process and other active procedure on data acquisition bus, state, the communication information and the operating state data such as data and time.Record data in communication data memory buffer are transferred to background process computing machine by transmission control module under the control of background process computing machine.Background process computing machine completes classification analysis to monitored data and storage, for user.
Bus monitoring system is the core component of bus monitoring node, usually also adopts the institutional framework shown in Fig. 3, but only realizes the one way data path from physical channel to processing layer.By Physical layer receiving cable data stream, after carrying out clock synchronous, 8b/10b decoding, serioparallel exchange, channel data is unpacked, then in the passage health status information that transmission sublayer provides according to media access control sublayer, data on all effective passages are carried out dynamic organization, form communication data packet (order bag or respond packet), and be stored in the data buffer of data buffering sublayer, finally together with the out of Memory such as communication data packet and timing code, write communication data memory buffer by processing layer, wait for and send background process computing machine to.
Based on the principle of work of above-mentioned UM-BUS bus and bus monitoring node, a kind of embodiment of passage health status pen recorder of the present invention is as follows:
A passage health status pen recorder is as shown in Figure 5 set in bus monitoring system, comprises Air conduct measurement identification module, ranks mapping block, three-dimensional channel table storer, channel data molded tissue block and communication data memory buffer.Air conduct measurement identification module monitors the Air conduct measurement process in bus at media access control sublayer, generate the source node number of Air conduct measurement, destination node number and passage health status word.Ranks mapping block is read and write three-dimensional channel table storer according to the request of Air conduct measurement identification module and channel data molded tissue block.Channel data molded tissue block is the specific implementation of transmission sublayer, data buffering sublayer and processing layer, and the dynamic organization being responsible for bus communication packet controls with transmission.Communication data memory buffer is used in dynamic reconfigurable bus monitoring system, store the bus communication information and bus Detection Information that listen to, when background processor needs, can take these bus activity information listened to away from communication data memory buffer.
Three-dimensional channel table storer is a dual-ported memory, is used for storing all nodes passage health status between any two on dynamic reconfigurable bus.As shown in Figure 5, the valid data width of left and right two ports of three-dimensional channel table storer is identical with the number of channels of dynamic reconfigurable bus, the significant address bit of left and right port is divided into row node address and row node address two parts, each data word represents the passage health status between corresponding row node and row node, a passage of each corresponding dynamic reconfigurable bus, the passage health status forming row node, row node and passage three dimensions stores form.
Passage health status pen recorder is adopted and is obtained and all nodes passage health status between any two on record trunk with step with the following method, during for transmission sublayer dynamic organization communication data packet:
(1) Air conduct measurement identification module is in media access control sublayer, Real-Time Monitoring is carried out to the channel data bag that each passage MAC module (MAC1 ~ MAC32) exports, when finding Detection Information bag (sense command bag, detection response packet or detection confirm bag), the respective stage of admission passage testing process, and start timer and start bus run testing process and follow the tracks of, from Detection Information bag, extract the source node number of Air conduct measurement and destination node number.At the end of the timing of bus run testing result the stage of recognition, whether Air conduct measurement identification module monitors to detect according to each passage confirms that its health status determined by bag, form the passage health status word of this Air conduct measurement, can monitor to detect and confirm that the passage of bag is available healthy passage, otherwise be faulty channel.After completing the tracking of bus run testing process, Air conduct measurement identification module gives ranks mapping block this source node detected number, destination node number and passage health status word, and generating completing of an Air conduct measurement settling signal notice ranks mapping block Air conduct measurement process, request ranks mapping block is by passage health status word write three-dimensional channel table storer.Air conduct measurement identification module is when Air conduct measurement completes, also need to form Detection Information bag, in write communication data memory buffer together with the out of Memory such as Detection Information (comprising source node number, destination node number, passage health status word, three kinds of Detection Information bag monitoring situations etc.) and timing code.
(2) when ranks mapping block receives the Air conduct measurement settling signal that Air conduct measurement identification module sends here, the source node sent here by Air conduct measurement identification module number is as the row node address of left mouth, destination node number as the row node address of left mouth, passage health status word from left mouth write three-dimensional channel table storer; The destination node simultaneously sent here by Air conduct measurement identification module number is as the row node address of right mouth, and source node number, as the row node address of right mouth, also writes three-dimensional channel table storer passage health status word from right mouth.
(3) channel data molded tissue block is by carrying out Real-Time Monitoring to the channel data bag that each passage MAC module (MAC1 ~ MAC32) exports, and realizes the monitoring to dynamic reconfigurable bus.When passage MAC module receives a packet, if a part for communication information bag, channel data molded tissue block is thought and is listened to a bus communication activity, according to bus communication protocol, the source node number extracting this bus communication activity from channel data bag gives ranks mapping block with destination node number.This source node number and destination node number as the row node address of left mouth and row node address, from three-dimensional channel table storer left mouth read-out channel health status word, are given channel data molded tissue block by ranks mapping block.Afterwards, channel data molded tissue block reads communication data according to this passage health status word from available bus run, and composition communication information bag, after the out of Memory such as additional period code, is stored in communication data memory buffer.
The file layout of table 2 three-dimensional channel table memory bus passage health status
In the present embodiment, UM-BUS bus supports 30 communication nodes and 32 bus runs, and comprise 0 and 31 two and retain node, totally 32 nodes, node number and channel number all need to represent with 5 bits.In order to store all nodes passage health status between any two, three-dimensional channel table storer adopts 32 dual-ported memories of 1024 words.In three-dimensional channel table storer, the file layout of bus run health status is as shown in table 2, and row node peacekeeping row node dimension respectively accounts for 5, forms 10 reference address of three-dimensional channel table storer.The corresponding physical channel of each 32 the word step-by-steps of three-dimensional channel table storer, represents that channel failure is unavailable when the health status X of memory channel, X are 0, represents that passage is healthy available state when being 1.
When channel data molded tissue block fetch channel health status word, source node number is tieed up address as row node, destination node number ties up address as row node, namely can read passage health status word when source node sends communication data packet to destination node.Now, in three-dimensional channel table storer, each just constitutes three-dimensional addressing space as shown in Figure 6, can provide the health status of any one passage between two communication nodes.In Fig. 6, M (2,30,6) when=1 expression three-dimensional channel table storer interior joint 2 communicates to node 30, the health status of the 6th passage is for healthy available, when M (3,4,4)=1 represents that node 3 communicates to node 4, the health status of the 4th passage is for healthy available.
According to UM-BUS bus protocol, bus communication process sends communications command bag by host node and starts, and sends communication response end-of-packet, in any moment, bus can only transmit a communication data packet from node.Therefore, in snoop procedure, channel data molded tissue block only can read the passage health status word of source node to destination node from three-dimensional channel table storer, conducts interviews from a port of three-dimensional channel table storer.But due in communication process, master and slave node all can send communication data packet as source node to the other side, therefore, three-dimensional channel table storer must be able to provide any one node as the passage health status of source node to other node.
But according to UM-BUS bus protocol, UM-BUS bus testing process can only be started by host node, the source node namely in Air conduct measurement process can only be the host node initiating to detect, and destination node is then detected node.Just can occur as the source node testing process from node like this, not do special process, just cannot to set up from node as passage health status word during source node in three-dimensional channel table storer, cause monitoring the communication response bag sent from node.Consider following two problems: 1) do not exist from node to from node and node to the communication process of controlling oneself in UM-BUS bus; 2) in bus run testing process, the duplex channel of master and slave node is all detected, so host node is consistent to the passage health status from node with the passage health status from node to host node.Therefore, following process is done to the storage of the passage health status of three-dimensional channel table storer:
(1) at the end of monitoring one-time detection process, passage health status word number at the row node number of left and right port and the different corresponding relations of row node number, is symmetrically write three-dimensional channel table storer corresponding two positions from left and right two ports by source node number and destination node by ranks mapping block.
(2) when resetting, all positions of three-dimensional channel table storer are all write 0.Like this, after bus testing process all terminates, host node all can write actual passage health status word to other node and the passage health status word between node to host node in testing process, and each passage health status word from node to other from node and each node to oneself can remain full 0.
Passage health status pen recorder in the dynamic reconfigurable bus monitoring system that the present invention realizes, solve in dynamic reconfigurable bus monitoring system, the problem that between each node of bus, passage health status obtains, records and use, achieves the correct monitoring to dynamic reconfigurable bus communication activity.
Without departing from the spirit of the scope of the invention, the present invention can have various deformation, as: the numbering etc. of number of nodes, number of channels, node and passage that bus is supported, all can change in different enforcement.These distortion are also contained within the present invention's scope required for protection.
Claims (7)
1. a passage health status pen recorder for dynamic reconfigurable bus monitoring system, is characterized in that: described passage health status pen recorder comprises Air conduct measurement identification module, ranks mapping block, three-dimensional channel table storer, channel data molded tissue block and communication data memory buffer.
2. passage health status pen recorder according to claim 1, it is characterized in that: described Air conduct measurement identification module is used for monitoring the Air conduct measurement process of dynamic reconfigurable bus, when monitoring an Air conduct measurement process, generating the source node number of Air conduct measurement, destination node number, passage health status word according to the Detection Information bag that monitors and generate Air conduct measurement settling signal and give ranks mapping block.
3. passage health status pen recorder according to claim 1, it is characterized in that: described ranks mapping block is for generating reference address and the control signal of three-dimensional channel table storer, when receiving the Air conduct measurement settling signal that Air conduct measurement identification module is sent here, the source node sent here by Air conduct measurement identification module number is as the row node address of left mouth, destination node number as the row node address of left mouth, passage health status word from left mouth write three-dimensional channel table storer; Destination node that Air conduct measurement identification module is sent here number as the row node address of right mouth, source node number as the row node address of right mouth, passage health status word simultaneously from right mouth write three-dimensional channel table storer.
4. passage health status pen recorder according to claim 1, it is characterized in that: described three-dimensional channel table storer is a dual-ported memory, be used for storing all nodes passage health status between any two on dynamic reconfigurable bus, it is left, the valid data width of right two ports is identical with the number of channels of dynamic reconfigurable bus, left, the significant address bit of right output port is divided into row node address and row node address two parts, each data word represents the passage health status between corresponding row node and row node, a passage of each corresponding dynamic reconfigurable bus, form row node, the passage health status of row node and passage three dimensions stores form.
5. passage health status pen recorder according to claim 1, is characterized in that: described communication data memory buffer is used in dynamic reconfigurable bus monitoring system, store the bus communication information and bus Detection Information that listen to.
6. passage health status pen recorder according to claim 1, it is characterized in that: described channel data molded tissue block is used for monitoring dynamic reconfigurable bus, whenever listening to a bus communication process, ranks mapping block is given by the source node of the communication information bag listened to number, destination node number, ranks mapping block using this source node number and destination node number as row node address and row node address, from any one port fetch channel health status word of three-dimensional channel table storer, give channel data molded tissue block; Channel data molded tissue block reads communication data according to this passage health status word from available bus run, and composition communication information bag, adds after comprising the information of timing code, be stored in communication data memory buffer.
7. passage health status pen recorder according to claim 2, it is characterized in that: described Air conduct measurement identification module is also for when monitoring an Air conduct measurement process, Detection Information is formed Detection Information bag together with the information comprising timing code, is stored in communication data memory buffer.
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