CN107579892A - A kind of communication means based on RapidIO agreements and RDMA technologies - Google Patents
A kind of communication means based on RapidIO agreements and RDMA technologies Download PDFInfo
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- CN107579892A CN107579892A CN201710756295.9A CN201710756295A CN107579892A CN 107579892 A CN107579892 A CN 107579892A CN 201710756295 A CN201710756295 A CN 201710756295A CN 107579892 A CN107579892 A CN 107579892A
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Abstract
The invention discloses a kind of communication means and device based on RapidIO agreements and RDMA technologies, this method includes：The the first User space data field for storing data to be sent is registered in the first kernel by transmitting terminal；The second user state data field sent using doorbell message acquisition receiving terminal is registered to the physical address in the second kernel；Transmitted using RDMA, data to be sent are sent to the physical address in the second kernel；Present invention hardwired interconnections agreement between the processors uses RapidIO agreements, can solve the interconnection problems between wiring board between processor integrated chip；Transmitted by RDMA, data to be sent in the first kernel of transmitting terminal will be registered to and be sent to the physical address that second user state data field is registered in the second kernel of receiving terminal, avoid the data copy between User space and kernel state, memory copying and communication overhead are reduced, so as to improve the network bandwidth between communication interface.
Description
Technical field
It is more particularly to a kind of logical based on RapidIO agreements and RDMA technologies the present invention relates to technical field of data transmission
Believe method and device.
Background technology
In traditional embedded multicomputer system, the interconnection between processor is realized by Time-shared bus
, all communication contention bus bandwidth, thereby result in that processor is more, and each processor available bandwidth is fewer, so as to bring
Serious system information transmissions ability bottleneck.
RapidIO is a kind of system interconnection technique proposed jointly by Motorola and Mercury companies, and it is a height
Performance, low pin count, the system-level interconnection protocol based on packet switch, there is extremely low delay and high bandwidth.RapidIO bus skills
The it is proposed of art eliminates bandwidth this bottleneck problem, successfully solves to interconnect between wiring board between processor integrated chip and asks
Topic.However, even if the hardwired interconnections agreement for having high speed is supported, want to provide the communication interface of high speed still very to terminal user
Difficult, the memory copying of redundancy and heavy communication overhead increasingly become the bottleneck for influenceing communication performance between multiprocessor,
The presently disclosed RapidIO communication interfaces realized using Ethernet simulator have only played the 10% of RapidIO communication performances.
A kind of RDMA (mote Direct Memory Access, the storage of journey immediate data) remote direct data storage skill
Art, in the case where not needing CPU to intervene, RDMA allows the internal memory of another processor of a processor direct read/write, so as to
Realize very high communication bandwidth and extremely low communication delay.
Therefore, RapidIO communication performances how are given full play to, reduce memory copying and communication overhead, so as to improve communication
Network bandwidth between interface, be now urgent need to resolve the problem of.
The content of the invention
It is an object of the invention to provide a kind of communication means and device based on RapidIO agreements and RDMA technologies,
RDMA technologies are introduced under RapidIO agreements, memory copying and communication overhead are reduced, so as to improve the Netowrk tape between communication interface
It is wide.
In order to solve the above technical problems, the present invention provides a kind of communication means based on RapidIO agreements and RDMA technologies,
Including：
The the first User space data field for storing data to be sent is registered in the first kernel by transmitting terminal；
The second user state data field that receiving terminal transmission is obtained using doorbell message is registered in the second kernel physically
Location；
Transmitted using RDMA, the data to be sent are sent to the physical address in second kernel.
Optionally, the first User space data field for storing data to be sent is registered in the first kernel by the transmitting terminal,
Including：
The virtual address of the first User space data field is mapped to the physical address in first kernel；
The first User space data field is locked；
Obtain physical message address sequence corresponding to the first User space data field；
The information needed for the RDMA transmission will be started, be written to the register of RDMA equipment.
Optionally, the second user state data field that receiving terminal transmission is obtained using doorbell message is registered to the second kernel
In physical address, including：
The first doorbell message is sent to the receiving terminal, the receiving terminal is registered to the second user state data field
Second kernel；
Receive the second doorbell message corresponding to the physical address that the receiving terminal is sent；
Second doorbell message is handled using doorbell message interrupt processing function, obtains the physical address.
Optionally, it is described to be transmitted using RDMA, the data to be sent are sent to the thing in second kernel
Address is managed, including：
Judge whether the data to be sent are sent；
If so, then perform RDMA interrupt processing functions, first User space data of the cancel register in first kernel
Area, and the 3rd doorbell message is sent to receiving terminal, make second user state number of the receiving terminal cancel register in second kernel
According to area.
In addition, present invention also offers a kind of communicator based on RapidIO agreements and RDMA technologies, including：
Registering modules, for the first User space data field for storing data to be sent to be registered in the first kernel；
Acquisition module, the second user state data field for being obtained receiving terminal transmission using doorbell message are registered in second
Physical address in core；
Transport module, for being transmitted using RDMA, the data to be sent are sent into second kernel described in
Physical address.
Optionally, the Registering modules, including：
Mapping submodule, for the virtual address of the first User space data field to be mapped in first kernel
Physical address；
Submodule is locked, for the first User space data field to be locked；
Acquisition submodule, for obtaining physical message address sequence corresponding to the first User space data field；
Submodule is write, required information is transmitted for the RDMA will to be started, is written to the register of RDMA equipment.
Optionally, the acquisition module, including：
First sending module, for sending the first doorbell message to the receiving terminal, make the receiving terminal by described second
User space data field is registered to second kernel；
Receiving submodule, the second doorbell message corresponding to the physical address sent for receiving the receiving terminal；
Submodule is handled, for handling second doorbell message using doorbell message interrupt processing function, described in acquisition
Physical address.
Optionally, the transport module, including：
Judging submodule, for judging whether the data to be sent are sent；
Cancel submodule, if being sent for the data to be sent, perform RDMA interrupt processing functions, cancel note
First User space data field of the volume in first kernel, and the 3rd doorbell message is sent to receiving terminal, cancel receiving terminal
The second user state data field being registered in second kernel.
A kind of communication means based on RapidIO agreements and RDMA technologies provided by the present invention, including：Transmitting terminal will be deposited
The the first User space data field for storing up data to be sent is registered in the first kernel；Obtain that receiving terminal sends using doorbell message the
Two User space data fields are registered to the physical address in the second kernel；Transmitted using RDMA, data to be sent are sent to second
Physical address in kernel；
It can be seen that the hardwired interconnections agreement of the present invention between the processors uses RapidIO agreements, can solve processor collection
Into the interconnection problems between chip between wiring board；Transmitted by RDMA, it is pending in the first kernel of transmitting terminal by being registered to
Send data to be sent to the physical address that second user state data field is registered in the second kernel of receiving terminal, avoid User space and
Data copy between kernel state, reduces memory copying and communication overhead, so as to improve the Netowrk tape between communication interface
It is wide.In addition, present invention also offers a kind of communicator based on RapidIO agreements and RDMA technologies, equally have with above-mentioned
Beneficial effect.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
A kind of stream for communication means based on RapidIO agreements and RDMA technologies that Fig. 1 is provided by the embodiment of the present invention
Cheng Tu；
A kind of stream for communication means based on RapidIO agreements and RDMA technologies that Fig. 2 is provided by the embodiment of the present invention
Journey schematic diagram；
A kind of knot for communicator based on RapidIO agreements and RDMA technologies that Fig. 3 is provided by the embodiment of the present invention
Composition.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
It refer to Fig. 1, Fig. 1 is provided a kind of logical based on RapidIO agreements and RDMA technologies by the embodiment of the present invention
The flow chart of letter method.This method can include：
Step 101：The the first User space data field for storing data to be sent is registered in the first kernel by transmitting terminal.
It is understood that this step can be before RDMA transmission, the processor as transmitting terminal treats itself storage
Send the process of User space data buffer zone (the first User space data field) registration in itself kernel (the first kernel) of data.
It is, transmitting terminal (SendProcess) as shown in Figure 2 is registered the process of (Registration),.
Specifically, this step can include the thing being mapped to the virtual address of the first User space data field in the first kernel
Manage address；First User space data field is locked, to ensure that the first kernel will not be by the first user during RDMA is transmitted
State data field is swapped out physical memory；Obtain physical message address sequence corresponding to the first User space data field；RDMA will be started
Information needed for transmission, the register of RDMA equipment is written to, is mapped with completing physical memory to the memory of device memory.
Step 102：The second user state data field that receiving terminal transmission is obtained using doorbell message is registered in the second kernel
Physical address.
Wherein, doorbell message can be the type of message of RapidIO protocol definitions.
Specifically, this step can be with as shown in Fig. 2 transmitting terminal first sends the first doorbell to receiving terminal (Recv Process)
Message (Req), make receiving terminal that also the second user state data field for receiving data to be sent is registered in the second kernel of itself,
Then transmitting terminal waits receiveing the response for receiving terminal；Receiving terminal receives the first of transmitting terminal using doorbell message interrupt processing function
After doorbell message, just by second user state data field registration (Registration) into the second kernel, and by the internal memory of registration
Physical address transmitting terminal is sent to by the second doorbell message (Ack)；Transmitting terminal is used at doorbell message interrupt processing function
The second doorbell message is managed, obtains the physical address.
That is, this step can include sending the first doorbell message to receiving terminal, make receiving terminal by second user state
Data field is registered to the second kernel；The second user state data field that receiving terminal is sent is received to be registered in the second kernel physically
Second doorbell message corresponding to location；The second doorbell message is handled using doorbell message interrupt processing function, obtains physical address
Step.
It is understood that second user state data field is registered to the detailed process in the second kernel in receiving terminal, with step
The detailed process that the first User space data field is registered in the first kernel in receiving terminal in rapid 101 is similar, will not be repeated here.
Step 103：Transmitted using RDMA, data to be sent are sent to the physical address in the second kernel.
It is understood that this step can be to be transmitted using RDMA, the first User space data field is registered in first
Data to be sent in core, the physical address being registered in the second kernel is sent to second user state data field, realizes the first use
The transmission pending for transmitting data to second user state data field in the state data field of family, avoids the number between User space and kernel state
According to copy, the expense of processor is reduced.
Specifically, this step can be the RDMAWrite processes in Fig. 2, can also be to be sent including judging in this step
Whether data are sent；If it is not, then continue to send operation next time；If so, then performing RDMA interrupt processing functions, take
Disappear first User space data field of the registration (Unregistration) in first kernel, and sends the 3rd to receiving terminal
Bell message (Win), make second user state data field of the receiving terminal cancel register in second kernel.It is corresponding, receiving terminal
Doorbell interrupt processing function can be utilized, after receiving the RDMA of transmission of transmitting terminal and transmitting completed 3rd doorbell message,
Second user state data field of the cancel register in the second kernel.
It should be noted that RDMA technologies are incorporated into setting for RapidIO communication interfaces by the method that the present embodiment is provided
Among meter, the characteristics of being stored using RDMA remote direct datas (i.e. zero-copy), RapidIO interconnection agreements are given full play of in itself
Advantage, both improved the network bandwidth between processor node, and reduced network delay again.
In the present embodiment, the embodiment of the present invention uses RapidIO agreements by hardwired interconnections agreement between the processors,
Can solve the interconnection problems between wiring board between processor integrated chip；Transmitted by RDMA, transmitting terminal will be registered to
The first kernel in data to be sent be sent to second user state data field and be registered in the second kernel of receiving terminal physically
Location, the data copy between User space and kernel state is avoided, reduces memory copying and communication overhead, so as to improve communication
Network bandwidth between interface.
It refer to Fig. 3, Fig. 3 is provided a kind of logical based on RapidIO agreements and RDMA technologies by the embodiment of the present invention
The structure chart of T unit.The device can include：
Registering modules 100, for the first User space data field for storing data to be sent to be registered in the first kernel；
Acquisition module 200, the is registered to for obtaining the second user state data field that receiving terminal sends using doorbell message
Physical address in two kernels；
Transport module 300, for being transmitted using RDMA, data to be sent are sent to the physical address in the second kernel.
Optionally, Registering modules 100, can include：
Mapping submodule, for the virtual address of the first User space data field to be mapped in the first kernel physically
Location；
Submodule is locked, for the first User space data field to be locked；
Acquisition submodule, for obtaining physical message address sequence corresponding to the first User space data field；
Submodule is write, required information is transmitted for RDMA will to be started, is written to the register of RDMA equipment.
Optionally, acquisition module 200, can include：
First sending module, for sending the first doorbell message to receiving terminal, make receiving terminal by second user state data field
It is registered to the second kernel；
Receiving submodule, for receiving the second doorbell message corresponding to the physical address of receiving terminal transmission；
Submodule is handled, for handling the second doorbell message using doorbell message interrupt processing function, obtains physical address.
Optionally, transport module 300, can include：
Judging submodule, for judging whether data to be sent are sent；
Cancel submodule, if being sent for data to be sent, perform RDMA interrupt processing functions, cancel register exists
The first User space data field in first kernel, and the 3rd doorbell message is sent to receiving terminal, make receiving terminal cancel register the
Second user state data field in two kernels.
In the present embodiment, the embodiment of the present invention uses RapidIO agreements by hardwired interconnections agreement between the processors,
Can solve the interconnection problems between wiring board between processor integrated chip；Transmitted by transport module 300 using RDMA,
Data to be sent in the first kernel of transmitting terminal will be registered to it is sent to second user state data field and is registered to the second of receiving terminal
Physical address in kernel, the data copy between User space and kernel state is avoided, reduces memory copying and communication overhead,
So as to improve the network bandwidth between communication interface.
Each embodiment is described by the way of progressive in specification, and what each embodiment stressed is and other realities
Apply the difference of example, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
Speech, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is referring to method part illustration
.
Professional further appreciates that, with reference to the unit of each example of the embodiments described herein description
And algorithm steps, can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software, the composition and step of each example are generally described according to function in the above description.These
Function is performed with hardware or software mode actually, application-specific and design constraint depending on technical scheme.Specialty
Technical staff can realize described function using distinct methods to each specific application, but this realization should not
Think beyond the scope of this invention.
Directly it can be held with reference to the step of method or algorithm that the embodiments described herein describes with hardware, processor
Capable software module, or the two combination are implemented.Software module can be placed in random access memory (RAM), internal memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
The communication means provided by the present invention based on RapidIO agreements and RDMA technologies and device have been carried out in detail above
It is thin to introduce.Specific case used herein is set forth to the principle and embodiment of the present invention, and above example is said
It is bright to be only intended to help the method and its core concept for understanding the present invention.It should be pointed out that the ordinary skill for the art
For personnel, under the premise without departing from the principles of the invention, some improvement and modification, these improvement can also be carried out to the present invention
Also fallen into modification in the protection domain of the claims in the present invention.
Claims (8)
- A kind of 1. communication means based on RapidIO agreements and RDMA technologies, it is characterised in that including：The the first User space data field for storing data to be sent is registered in the first kernel by transmitting terminal；The second user state data field sent using doorbell message acquisition receiving terminal is registered to the physical address in the second kernel；Transmitted using RDMA, the data to be sent are sent to the physical address in second kernel.
- 2. the communication means according to claim 1 based on RapidIO agreements and RDMA technologies, it is characterised in that described The the first User space data field for storing data to be sent is registered in the first kernel by transmitting terminal, including：The virtual address of the first User space data field is mapped to the physical address in first kernel；The first User space data field is locked；Obtain physical message address sequence corresponding to the first User space data field；The information needed for the RDMA transmission will be started, be written to the register of RDMA equipment.
- 3. the communication means according to claim 1 based on RapidIO agreements and RDMA technologies, it is characterised in that described The second user state data field sent using doorbell message acquisition receiving terminal is registered to the physical address in the second kernel, including：The first doorbell message is sent to the receiving terminal, the receiving terminal is registered to the second user state data field described Second kernel；Receive the second doorbell message corresponding to the physical address that the receiving terminal is sent；Second doorbell message is handled using doorbell message interrupt processing function, obtains the physical address.
- 4. the communication means according to claim 1 based on RapidIO agreements and RDMA technologies, it is characterised in that described Transmitted using RDMA, the data to be sent are sent to the physical address in second kernel, including：Judge whether the data to be sent are sent；If so, RDMA interrupt processing functions are then performed, first User space data field of the cancel register in first kernel, and The 3rd doorbell message is sent to receiving terminal, makes second user state data field of the receiving terminal cancel register in second kernel.
- A kind of 5. communicator based on RapidIO agreements and RDMA technologies, it is characterised in that including：Registering modules, for the first User space data field for storing data to be sent to be registered in the first kernel；Acquisition module, the second user state data field for being obtained receiving terminal transmission using doorbell message are registered in the second kernel Physical address；Transport module, for being transmitted using RDMA, the data to be sent are sent to the physics in second kernel Address.
- 6. the communicator according to claim 5 based on RapidIO agreements and RDMA technologies, it is characterised in that described Registering modules, including：Mapping submodule, for the physics being mapped to the virtual address of the first User space data field in first kernel Address；Submodule is locked, for the first User space data field to be locked；Acquisition submodule, for obtaining physical message address sequence corresponding to the first User space data field；Submodule is write, required information is transmitted for the RDMA will to be started, is written to the register of RDMA equipment.
- 7. the communicator according to claim 5 based on RapidIO agreements and RDMA technologies, it is characterised in that described Acquisition module, including：First sending module, for sending the first doorbell message to the receiving terminal, make the receiving terminal by the second user State data field is registered to second kernel；Receiving submodule, the second doorbell message corresponding to the physical address sent for receiving the receiving terminal；Submodule is handled, for handling second doorbell message using doorbell message interrupt processing function, obtains the physics Address.
- 8. the communicator according to claim 5 based on RapidIO agreements and RDMA technologies, it is characterised in that described Transport module, including：Judging submodule, for judging whether the data to be sent are sent；Cancel submodule, if being sent for the data to be sent, perform RDMA interrupt processing functions, cancel register exists The first User space data field in first kernel, and the 3rd doorbell message is sent to receiving terminal, make receiving terminal cancel register Second user state data field in second kernel.
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Application publication date: 20180112 |