CN101753584B - Method for improving rapid message processing speed of intelligent transformer substation under VxWorks system - Google Patents
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Abstract
The invention relates to a method for improving the rapid message processing speed of an intelligent transformer substation under a VxWorks system. A plurality of network interfaces in the system are divided into two types according to the application requirements, one type is non-rapid message network interfaces and the other type is rapid message network interfaces, when a network interface card has an interruption, the network work of the non-rapid message network interfaces is processed by network tasks of the VxWorks system, and the network work of the rapid message network interfaces isprocessed by newly added network tasks of netTaskId2 . Rapid message application tasks use a buffer region of a network memory pool, and the communication between the network tasks and the rapid message application tasks is realized by using a pointer queue. The invention can ensure the network work of the rapid message network interfaces are processed superior to or can take over the network work of the non-rapid message network interfaces and the processing of protocol stack work, thereby greatly improving the real-time processing of the rapid message. For short frames, the invention avoidsthe memory copy by a mode of reserving the buffer region.
Description
(1), technical field the present invention relates to improve under a kind of VxWorks system method of rapid message processing speed of intelligent transformer substation, belongs to power system automatic field.
(2), the background technology intelligent substation is an important ring of intelligent grid.In traditional transformer station, the protection measure and control device through a large amount of hardwires directly gather analog quantity with open into, leave signal.In intelligent substation; The signal of process layer electronic mutual inductor collection is after the merging unit gathers; Be published on the Ethernet through optical fiber; The on off state amount that intelligent switch is also gathered oneself is published on the Ethernet, and the mode that the protection measure and control device adopts multicast to subscribe to is obtained required information, and will protect the couplet block signal that exports between signal, switch divide-shut brake signal, the cell device etc. to be published on the Ethernet through network.Intelligent substation depends on the network of an information sharing, high speed reliable transmission strongly.IEC 61850 specific definitions sampled value message, general OO transformer substation case (GOOSE) message and corresponding service model; These two types of messages all only comprise physical layer, data link layer and application layer when carrying out the protocol stack mapping, removing network layer, transport layer, session layer and presentation layer is in order to improve efficiency of transmission.The sampled value message is a periodically packet, and the GOOSE message is a message sudden and that retransmit by certain intervals, and their total delays should be controlled between the 1-4ms.If press ripple (20ms) 80 point samplings weekly; 250 microseconds just will produce a sampled point so, even the data of two sampled points are broken into a bag transmission, the data on the network also will be very busy; And; Also have MMS (manufacturing message specification) even other network communication protocol between wall and the station level, therefore, wall protection measure and control device need take high-efficiency method to handle the rapid message with crucial meaning.
VxWorks is the widely used main flow embedded real-time operating system of present intelligent substation, realizes that through binding protocol on the appointment network interface card reception of Ethernet message is handled and interruption is sent.Agreement such as binding IP on network interface card when system is initial if network interface card need be handled rapid message, is then bound new User Defined agreement in application.System safeguards an agreement chained list for each network interface.When network interface card takes place to interrupt; Interrupt service routine adds corresponding network work in the network work formation to; Utilize the network task of a synchronizing signal amount notice VxWorks then; VxWorks carries out in network task that message receives, corresponding protocol processing, and the resending of the message queue to be sent of network card binding agreement.Following certain situation will cause delay to the processing of rapid message:
1: same network interface card receives the processing that the non-rapid message that arrives first in the buffering area has delayed the back rapid message that arrives;
2:, then can cause to delay to handle to the rapid message that has arrived in other network interface card if the non-rapid message of carrying out in the network interface card is handled;
3: some other work disposal that network protocol stack carries out, like timer processing of Transmission Control Protocol etc.
A kind of usual way is in the network interface card interrupt service routine, to receive message, and the formation of according to the message classification message being put into different priorities then triggers the different priorities task of handling corresponding message queue.This method can guarantee that the rapid message of high priority in time obtains handling, but the mixed-media network modules mixed-media design of its processing mode and VxWorks system has very big difference.The network interface card interrupt service routine of VxWorks system is only done the work of minute quantity, and message reception and protocol processes etc. are all carried out in network task, that is to say that message receives and protocol processes is incorporate, middle not buffer queue.
Message sends all that the invocation protocol transmission interface carries out in application task; When Internet resources are crowded; Message will get in the formation to be sent of network card binding agreement; Network interface card is had no progeny in produce sending after a while, and delivery work will join in the network task, and network task will send the message in the message queue to be sent of each agreement in the network interface card agreement chained list.If with the stem that the rapid message agreement is added the agreement chained list to, can guarantee that then the rapid message of this network interface card preferentially obtains delivery, but the delivery of the non-rapid message of other network interface card is handled the delivery processing that may delay this network interface card rapid message.
In the design of intelligent substation, the high performance mainboard of cell device need have more network interface, as 6-8, and the consideration of flow Network Based, fail safe and reliability, these network interfaces are divided into different application, like the MMS net, sampling network, GOOSE net etc.MMS net, GOOSE net require double-network redundant.
(3), summary of the invention technical problem to be solved by this invention is; Propose to improve under a kind of VxWorks system method of rapid message processing speed of intelligent transformer substation; The network work request of existing non-rapid message network interface in the network work formation; When the network work request of rapid message network interface is arranged again, the network work request of priority treatment rapid message network interface; When network task is being handled the network work request of non-rapid message network interface, can switch in real time in the network work Request Processing of the rapid message network interface that has arrived; When network task is being handled other event request of network protocol stack, can switch in real time in the network work Request Processing of the rapid message network interface that has arrived; After procotol detects rapid message, with a kind of reliably, mode is submitted to the rapid message application task and is handled fast, so that application task obtains vital rapid message data message as early as possible; EMS memory management process is efficiently used in the reception of rapid message and transmission.
In order to address the above problem, the present invention has adopted following technical scheme.
Improve the method for rapid message processing speed of intelligent transformer substation under a kind of VxWorks system, it is characterized in that: according to application demand a plurality of network interfaces in the system are divided into two types, one type is non-rapid message network interface, and another kind of is the rapid message network interface; The size of each buffering area of network internal storage pond that definition rapid message network interface uses is 1580 bytes;
Creating the formation of three VxWorks buffer circle types, is respectively network work formation netJobRing2, is used for depositing function pointer and corresponding suction parameter thereof, GOOSE message pointer alignment GOOSERing, sampled value message pointer alignment SVRing; Creating three binary system synchronizing signal amounts, is respectively netTaskSemId2, GOOSESemId, SVSemId; Create a network task netTaskId2 higher than grid task priority, network task netTaskId2 suspension is waited on synchronizing signal amount netTaskSemId2;
When the network interface card interruption takes place when; It is non-rapid message network interface or rapid message network interface that the network interface card interrupt service routine is distinguished current network interface; If be non-rapid message network interface; Then equally the network work of this network interface is added in the grid work queue, handle by the grid task with the former design of VxWorks; If the rapid message network interface, then the network work with this network interface adds among the network work formation netJobRing2, triggering synchronous semaphore netTaskSemId2, and netTaskId2 handles by network task;
The rapid message agreement is put into GOOSE pointer alignment GOOSERing with the message pointer after detecting the GOOSE message, triggering synchronous semaphore GOOSESemId, and notice GOOSE application task is handled; The rapid message agreement is put into sampled value pointer alignment SVRing with the message pointer after detecting the sampled value message, triggering synchronous semaphore SVSemId, and notice sampled value application task is handled; Application task reads the message pointer from pointer alignment, handle the back and discharge message;
Use the buffering area in network internal storage pond when sending rapid message; This buffering area is divided into two, and first is 1520 bytes, and second is 60 bytes; During message coding from first the afterbody framing of encoding forward; When 60 bytes of frame length less than, confirm that frame length is 60 bytes, this moment, message tail was used the segment space of second block buffer.
Network work formation netJobRing2 is the data that network interface card interrupt service routine and network task netTaskId2 share; GOOSE pointer alignment GOOSERing is the data that network task netTaskId2 and GOOSE application task are shared; Sampled value pointer alignment SVRing is the data that network task netTaskId2 and sampled value application task are shared; Use these shared buffers of read-write interface operation of VxWorks buffer circle, need not use the mutual exclusion mechanism of operating system.
Good effect of the present invention is: according to application demand a plurality of network interfaces in the system are divided into two types; One type is non-rapid message network interface; Another kind of is the rapid message network interface; When network interface card took place to interrupt, the network work of non-rapid message network interface was handled by VxWorks grid task, and the network work of rapid message network interface is handled by the network task netTaskId2 that increases newly.Because the priority of network task netTaskId2 is higher than the priority of VxWorks grid task; The processing that therefore can guarantee rapid message network interface network work has precedence over or can seize non-rapid message network interface network work; And the processing of protocol stack work, thereby the processing speed of raising rapid message.
Network work formation netJobRing2 is the data that network interface card interrupt service routine and network task netTaskId2 share; GOOSE pointer alignment GOOSERing is the data that network task netTaskId2 and GOOSE application task are shared; Sampled value pointer alignment SVRing is the data that network task netTaskId2 and sampled value application task are shared; Use these shared buffers of read-write interface operation of VxWorks buffer circle, need not use the mutual exclusion mechanism of operating system.The sampled value message is very short blanking time, and data volume is very big, has therefore significantly reduced to solving the CPU expense that race condition brings.The network internal storage administrative mechanism of VxWorks provides the indicator linking between the different messages; If rapid message is linked with pointer; Then the depositing and obtain and need prevent race condition with mutual exclusion mechanism of message can increase the CPU expense, therefore uses pointer alignment to be superior to list structure.
According to IEC 61850 standards; The length of each rapid message all is no more than the frame length of an Ethernet; Therefore the application task network internal storage pond that can use VxWorks, the reception of rapid message and send the effect that has all realized zero_copy has improved the real-time that rapid message is handled greatly.For short frame, also avoided internal memory to duplicate through the mode of reserving buffering area.
(4), description of drawings Fig. 1 is that rapid message receives schematic flow sheet.
Fig. 2 is the processing sketch map of buffering area when sending the weak point frame.
(5), embodiment further specifies the present invention below in conjunction with accompanying drawing and specific embodiment.
1, the realization of network task netTaskId2:
(1) according to application demand a plurality of network interfaces in the system are divided into two types, one type is non-rapid message network interface, and another kind of is the rapid message network interface.The size of each buffering area of network internal storage pond that definition rapid message network interface uses is 1580 bytes.
VxWorks is made up of two parts the sign of a network interface, and a part is the network card equipment title, and another part is the network card equipment unit number, and both combine unique in a tag system network interface.Set up a table according to parameter configuration files in system when initial, be used to express the mapping relations between network interface sign and the message classification.
(2) one of design is added the more general network work of function netJobAdd () than VxWorks network work and is added function netJobAdd2 (); Its suction parameter is except a network work function pointer and 5 these network work function pointer corresponding parameters; Also comprise a VxWorks buffer circle pointer and a binary system synchronizing signal amount; The function of netJobAdd2 () is to call the rngBufPut () function of VxWorks; With network work function pointer and 5 these network work function pointer corresponding parameters; Be written in the buffer circle of netJobAdd2 () parameter appointment, trigger the binary system synchronizing signal amount of netJobAdd2 () parameter appointment then.
The implementation of VxWorks buffer circle read-write operation is not used the mutual exclusion mechanism of kernel, but can guarantee one read with one write concurrent operations and race condition can not take place.Because the buffer circle of sharing among the present invention have only one read with one write concurrent operations, so rngBufPut () function need not carried out closing under the condition of interrupting, the CPU expense of having avoided race condition to bring has improved execution efficient.
(3) network task entrance function netTask2 more general of design than VxWorks network task entrance function netTask; Be used to handle the network work that rapid message network interface interrupt service routine generates; The suction parameter of task comprises a binary system synchronizing signal amount and a buffer circle; The operational mode of task is: the task suspension is waited on the synchronizing signal amount of task suction parameter appointment, after task is waken up, from the buffer circle of task suction parameter appointment, calls the rngBufGet () function of VxWorks; Circulation is read network work and is handled accordingly, and network works all in buffer circle all have been processed.RngBufGet () function need not carried out under the condition of closing interruption yet, and the CPU expense of having avoided race condition to bring has improved execution efficient.
(4) create the network work formation netJobRing2 of VxWorks buffer circle type during the grid initialization, be used to deposit network work and the suction parameter thereof that rapid message network interface interrupt service routine adds; Create VxWorks binary system synchronizing signal amount netTaskSemId2, be used for rapid message network interface interrupt service routine informing network task netTaskId2; Utilize entrance function netTask2 to create network task netTaskId2, priority is higher than the grid task, and its suction parameter is buffer circle netJobRing2 and binary system synchronizing signal amount netTaskSemId2.
(5) VxWorks network interface card interrupt service routine is improved; When in the network work formation, adding network work; Distinguishing current network interface is non-rapid message network interface or rapid message network interface; If be non-rapid message network interface, the netJobAdd () function that then equally calls VxWorks with the former design of VxWorks adds the network work of this network interface among the network work formation netJobRing of VxWorks to, is handled by the grid task; If the rapid message network interface, then call described netJobAdd2 () function the network work of this network interface is added among the network work formation netJobRing2, netTaskId2 handles by network task.
2, the Communication Realization between rapid message application task and the network task netTaskId2:
Create GOOSE message pointer alignment GOOSERing, the sampled value message pointer alignment SVRing of VxWorks buffer circle type; Create binary system synchronizing signal amount GOOSESemId, SVSemId.
The rapid message agreement is put into GOOSE pointer alignment GOOSERing with the message pointer after detecting the GOOSE message, triggering synchronous semaphore GOOSESemId, and notice GOOSE application task is handled; The rapid message agreement is put into sampled value pointer alignment SVRing with the message pointer after detecting the sampled value message, triggering synchronous semaphore SVSemId, and notice sampled value application task is handled; Application task reads the message pointer from pointer alignment, handle the back and discharge message.
Each buffering area of VxWorks network internal storage pond is made up of a mBlk-clBlk-Cluster chained list; Cluster representes actual buffering area; The structure of the CL BLK type that clBlk is pointed has the data attribute of describing initial pointer of buffering area and buffering section length, and the structure of the M BLK type that mBlk is pointed has the initial pointer mData and the actual buffer length mLen that uses of the actual use of this buffering area.What deposit in the pointer alignment is the mBlk pointer, and application program is according to the real data in the mBlk pointer operation buffering area.
GOOSE pointer alignment GOOSERing is the data that network task netTaskId2 and GOOSE application task are shared; Sampled value pointer alignment SVRing is the data that network task netTaskId2 and sampled value application task are shared; Use these shared buffers of read-write interface operation of VxWorks buffer circle; Need not use the mutual exclusion mechanism of operating system, the CPU expense of having avoided race condition to bring has improved execution efficient.
3, rapid message is sent:
Use the buffering area in network internal storage pond when sending rapid message, describe with a mBlk-clBlk-Cluster chained list.This buffering area is divided into two, and first is 1520 bytes, and second is 60 bytes; During message coding from first the afterbody framing of encoding forward; When 60 bytes of frame length less than, confirm that frame length is 60 bytes, this moment, message tail was used the segment space of second block buffer.
Behind the coding the initial pointer of message is composed the mData data member to mBlk pointer indication structure, the physical length of message is composed the mLen data member to mBlk pointer indication structure, driver uses the mBlk pointer to send message.
Claims (2)
1. improve the method for rapid message processing speed of intelligent transformer substation under the VxWorks system, it is characterized in that: according to application demand a plurality of network interfaces in the system are divided into two types, one type is non-rapid message network interface, and another kind of is the rapid message network interface; The size of each buffering area of network internal storage pond that definition rapid message network interface uses is 1580 bytes;
Creating the formation of three VxWorks buffer circle types, is respectively network work formation netJobRing2, is used for depositing function pointer and corresponding suction parameter thereof, GOOSE message pointer alignment GOOSERing, sampled value message pointer alignment SVRing; Creating three binary system synchronizing signal amounts, is respectively netTaskSemId2, GOOSESemId, SVSemId; Create a network task netTaskId2 higher than grid task priority, network task netTaskId2 suspension is waited on synchronizing signal amount netTaskSemId2;
When the network interface card interruption takes place when; It is non-rapid message network interface or rapid message network interface that the network interface card interrupt service routine is distinguished current network interface; If be non-rapid message network interface; Then equally the network work of this network interface is added in the grid work queue, handle by the grid task with the former design of VxWorks; If the rapid message network interface, then the network work with this network interface adds among the network work formation netJobRing2, triggering synchronous semaphore netTaskSemId2, and netTaskId2 handles by network task;
The rapid message agreement is put into GOOSE pointer alignment GOOSERing with the message pointer after detecting the GOOSE message, triggering synchronous semaphore GOOSESemId, and notice GOOSE application task is handled; The rapid message agreement is put into sampled value pointer alignment SVRing with the message pointer after detecting the sampled value message, triggering synchronous semaphore SVSemId, and notice sampled value application task is handled; Application task reads the message pointer from pointer alignment, handle the back and discharge message;
Use the buffering area in network internal storage pond when sending rapid message; This buffering area is divided into two, and first is 1520 bytes, and second is 60 bytes; During message coding from first the afterbody framing of encoding forward; When 60 bytes of frame length less than, confirm that frame length is 60 bytes, this moment, message tail was used the segment space of second block buffer;
Said GOOSE is meant general OO transformer substation case.
2. improve the method for rapid message processing speed of intelligent transformer substation under the VxWorks as claimed in claim 1 system; It is characterized in that: network work formation netJobRing2 is the data that network interface card interrupt service routine and network task netTaskId2 share; GOOSE pointer alignment GOOSERing is the data that network task netTaskId2 and GOOSE application task are shared; Sampled value pointer alignment SVRing is the data that network task netTaskId2 and sampled value application task are shared; Use these shared buffers of read-write interface operation of VxWorks buffer circle, need not use the mutual exclusion mechanism of operating system.
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| CN102394729B (en) * | 2011-11-23 | 2013-07-10 | 东方电子股份有限公司 | Organizing method for IEC 61850 GOOSE message |
| CN102546399B (en) * | 2011-12-16 | 2014-09-17 | 广东电网公司茂名供电局 | Intelligent transformer substation process level message linear processing framework and intelligent transformer substation process level message linear processing method |
| CN103338158B (en) * | 2013-06-07 | 2017-11-21 | 国家电网公司 | A kind of GOOSE message transmission delay jitter suppression method |
| CN105162727B (en) * | 2015-08-13 | 2017-12-01 | 东方电子股份有限公司 | A kind of method for realizing quick peer-to-peer communications in DSFA systems based on VxWorks system |
| CN106844151B (en) * | 2017-01-04 | 2019-11-12 | 南京国电南自电网自动化有限公司 | A kind of network task method for detecting abnormality of VxWorks system |
| CN109413064B (en) * | 2018-10-24 | 2021-04-27 | 同方电子科技有限公司 | Application layer protocol message processing method between single network card VxWorks system and multiple hosts |
| CN111522591A (en) * | 2020-04-24 | 2020-08-11 | 中电科航空电子有限公司 | Method for realizing quick start software of VxWorks cert and computer program product |
| CN111447149A (en) * | 2020-06-17 | 2020-07-24 | 广东电网有限责任公司佛山供电局 | Shared storage-based GOOSE message dual-network inhibition method |
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