CN102722414A - Input/output (I/O) resource management method for multi-root I/O virtualization sharing system - Google Patents
Input/output (I/O) resource management method for multi-root I/O virtualization sharing system Download PDFInfo
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Abstract
The invention discloses an input/output (I/O) resource management method for a multi-root I/O virtualization sharing system. The method for implementing centralized initialization configuration and allocation management on all I/O equipment in the multi-root I/O virtualization sharing system by using a master control root node comprises the following steps of: 1, performing enumeration discovery and initialization configuration on I/O resources in the system by the master control root node; 2, assisting a management user in managing and controlling I/O equipment resources in the system through a peripheral component interconnect express (PCIe) management module by the master control root node, and executing an I/O resource allocation strategy formulated by the management user; and 3, establishing a mapping relation between equipment functions and root nodes thereof according to the PCIe management module and an I/O resource allocation table by the master control root node to realize dynamic allocation of t he I/O resources.
Description
Technical field
The present invention relates to the I/O Intel Virtualization Technology, particularly relate to a kind of I/O method for managing resource that is used for the many virtual shared systems of I/O.
Background technology
In the heart, each blade server all has independently I/O resource in conventional data centers or cloud computing, like network interface card, HBA adapter etc.Yet the close-coupled of calculating and I/O resource makes the expansion of two types of resources receive the restriction of server space simultaneously.In addition, high-performance I/O equipment (like the 10GigE network interface card) only depends on a station server, has reduced its utilization ratio undoubtedly, has improved system synthesis originally.For addressing the above problem, will remove the close-coupled of calculating with the I/O resource, its key is exactly to realize I/O equipment sharing between a plurality of servers.
In recent years; The technology of sharing of I/O equipment has obtained the development of the property changed, and industry standard organizes the special interest group PCI-SIG of PCI successively to formulate PCI-SIG Single Root I/O Virtualization (SR-IOV: single IO is virtual) and PCI-SIG Multi-Root I/O Virtualization (MR-IOV: many IO are virtual) standard.Possess the different virtual machine (VM/Guest) that the PCI Express equipment of SR-IOV ability can be running on the same host and share, and the I/O performance near this machine is provided for virtual machine.At present SR-IOV has obtained the extensive support of I/O equipment vendors, like the gigabit ethernet card of supporting SR-IOV, 10G Ethernet card, HBA adapter etc.
Possess some virtual machines (VM/Guest) that the PCI Express equipment of MR-IOV ability can be moved on a plurality of hosts and share, the MR-IOV technology can remove fully calculate and I/O between close-coupled.But because the MR-IOV agreement of PCI-SIG is difficult to accepted by industry member to the bigger change (comprising the modification to PCIe basic agreement, PCIe device structure and PCIe switch architecture) of original system.Yet, for itself possessing the ability that supplies a plurality of virtual machines directly to share is simultaneously arranged as SR-IOV and multifunctional equipment etc., if a series of additional supports are provided, realize that it is feasible that the I/O resource is shared between a plurality of root nodes to it.
When an I/O equipment was shared by a plurality of root nodes through the PCIe switch architecture, each root node was all enumerated this equipment with trial after system start-up.This will cause system competition, and root node can influence the operation of other root nodes to the modification of I/O equipment in the topological structure, finally causes system's cisco unity malfunction.
Summary of the invention
For addressing the above problem; The invention provides the I/O method for managing resource in the virtual shared system of a kind of many I/O; Be used to solve the technical matters of the resource management and the distribution of the many virtual shared systems of IO, avoid the conflict and the competition of each root node in the many virtual shared systems of I/O.
The present invention discloses a kind of I/O method for managing resource that is used for the many virtual shared systems of I/O, comprising:
Step 2, main control root node are through the PCIe administration module, and the I/O device resource in auxiliary management user management and the control system is carried out the I/O resource allocation policy that leading subscriber is formulated;
Step 3, main control root node are through PCIe administration module and I/O resource allocation table, and the mapping relations of apparatus for establishing function and the root node under it realize the distribution of I/O resource dynamic.
Be used for the I/O method for managing resource of the many virtual shared systems of I/O, said step 2 comprises:
Step 21, all PCIe module informations and present to leading subscriber in the PCIe administration module collection system, auxiliary leading subscriber initialization or revise resource allocation policy;
Step 22, PCIe administration module be according to user's I/O resource allocation policy, and the transmitting apparatus distribution instruction realizes the allocation manager of I/O resource.
The method for managing resource that is used for the many virtual shared systems of I/O, said PCIe module information comprises:
Root node information, said root node information comprises the number of root node, I/O resource that each root node has and the load condition of each root node;
The I/O facility information, said I/O facility information comprises that functions of the equipments ID number, functions of the equipments descriptor and functions of the equipments take situation.
The I/O method for managing resource that is used for the many virtual shared systems of I/O, said I/O resource allocation table comprises:
Said resource allocation table is arranged in each PCIe downstream port of the many virtual shared control units of I/O, the corresponding I/O resource allocation table of each I/O equipment; Said resources allocation table record the mapping relations of the root node under functions of the equipments and its; Wherein, table index is functions of the equipments ID numbers in main control root node PCIe territory, the table clause content description root node sign ID and ID number in affiliated root node PCIe territory thereof under the functions of the equipments.
The I/O method for managing resource that is used for the many virtual shared systems of I/O, the I/O resource dynamic in the said step 3 is distributed and is comprised:
The I/O initializing resource distributes, and said I/O initializing resource distributes and refers to that when system initialization the main control root node is each subordinate root node distributing equipment function, sets up the process of initial PCIe topological structure;
The I/O resource reclaims, and said I/O resource reclaims and refers under the situation that does not influence other root node work, and the main control root node is in the process of subordinate root node deletion I/O functions of the equipments;
I/O redistribute resources, said I/O redistribute resources refer to that under the situation that does not influence other root node work the main control root node increases the process of I/O functions of the equipments to the subordinate root node.
The I/O method for managing resource that is used for the many virtual shared systems of I/O, said I/O initializing resource distributes and comprises:
Step 61, leading subscriber is formulated initial allocation strategy according to the demand of root node and the I/O resource of system, and through PCIe administration module transmitting apparatus distribution instruction;
Step 62, the PCIe administration module distributes transaction packet through transmitting apparatus, carries out the resource allocation policy of leading subscriber; Said devices allocation transaction packet; Be that the PCIe internal memory is write transaction packet; Said PCIe internal memory is write transaction packet and has been indicated and want apparatus operating functional identity number, promptly the sign of the root node under ID number in main control root node PCIe territory, these functions of the equipments ID with and in affiliated root node PCIe territory ID number; Wherein, affiliated root node ID number is subordinate root node ID number, indicates a devices allocation instruction;
Step 63, PCIe downstream port receive the transaction packet of devices allocation described in the step 62, resolve transaction packet obtain want apparatus operating functional identity number, the root node under it identify ID with and in affiliated root node PCIe territory ID number; And will be by the sign of the root node under functions of the equipments ID and its ID component content in affiliated root node PCIe territory; Write in the corresponding list item of I/O resource allocation table of wanting number indication of apparatus operating functional identity, and then specified the I/O functions of the equipments of distribution for each subordinate root node;
After step 64, main control root node were accomplished the I/O device resource initialization distribution to the subordinate root node, the subordinate root node was directed carrying out the rescanning of PCIe equipment, and discovery and initial configuration are distributed the functions of the equipments that obtain.
The I/O method for managing resource that is used for the many virtual shared systems of I/O, said I/O resource reclaim and comprise:
Step 71, leading subscriber determines from certain certain functions of the equipments of root slave node deletion, through PCIe management software transmitting apparatus recovery command according to demand;
Step 72, the PCIe administration module distributes transaction packet through transmitting apparatus, carries out the resource recovery command of leading subscriber; Said devices allocation transaction packet is that the PCIe internal memory is write transaction packet, said PCIe internal memory write the things bag indicated under I/O functions of the equipments ID number that will operate, these functions of the equipments root node ID number with and in affiliated root node PCIe territory ID number; Wherein, the root node sign ID under the function indicates an equipment recovery command for main control root node sign ID;
Step 73, PCIe downstream port receiving equipment are distributed transaction packet, resolve transaction packet obtain want apparatus operating functional identity number, the root node under it identify ID with and in affiliated root node PCIe territory ID number;
Step 74, affiliated root node sign ID judges; If the affiliated root node sign ID that indicates in the configuration transaction bag indicates an equipment recovery command for main control root node sign ID;
Step 75 reads the corresponding list item of I/O resource allocation table that transaction packet is wanted number indication of apparatus operating functional identity, and to virtual hot plug incident of subordinate root node transmission of list item indication, notice has the I/O functions of the equipments to be pulled out;
Step 76, the corresponding list item of I/O resource allocation table of the functions of the equipments ID of reset operation number indication; To be complete zero functional identity component content with value by main control root node sign ID, write in the corresponding list item of I/O resource allocation table of wanting number indication of apparatus operating functional identity;
Step 77, target subordinate root node receives this hot plug incident, this equipment removed from the PCIe topological structure, and unloading corresponding driving program.
The I/O method for managing resource that is used for the many virtual shared systems of I/O, said I/O redistribute resources comprises:
Step 81, leading subscriber increases certain equipment merit fully according to demand decision and indication to certain subordinate root node, through PCIe management software transmitting apparatus reallocation instruction;
Step 82, the PCIe administration module distributes transaction packet through transmitting apparatus, carries out the redistribute resources instruction of leading subscriber; Said devices allocation transaction packet; Be that the PCIe internal memory is write transaction packet; Said PCIe internal memory is write transaction packet and has been indicated the I/O functions of the equipments that will operate ID number, promptly the sign of the root node under ID number in main control root node PCIe territory, these functions of the equipments ID with and in affiliated root node PCIe territory ID number; Wherein, the root node sign ID under the function is subordinate root node sign ID, indicates a devices allocation instruction;
Step 83, PCIe downstream port receiving equipment are distributed transaction packet, resolve transaction packet obtain want apparatus operating functional identity number, the root node under it identify ID with and in affiliated root node PCIe territory ID number;
Step 84, affiliated root node sign ID judges; If the affiliated root node ID that indicates in the configuration transaction bag is non-main control root node ID, indicate a devices allocation instruction;
Step 85, to virtual hot plug incident of subordinate root node transmission of transaction packet indication, the corresponding subordinate root node of notice has I/O equipment to insert its PCIe topological structure; Simultaneously; Will be by the sign of the root node under functions of the equipments ID and its ID component content in affiliated root node PCIe territory; Write in the corresponding list item of I/O resource allocation table of wanting number indication of apparatus operating functional identity, and then be that this subordinate root node increases I/O functions of the equipments of distribution;
Step 86, target subordinate root node receives the hot plug incident, this equipment is scanned and initial configuration, and load the corresponding driving program.
Beneficial effect of the present invention is: solved in the many virtual shared systems of I/O through I/O method for managing resource of the present invention and competed and conflict by the shared system that causes of a plurality of root nodes because of an I/O equipment; And can between a plurality of root nodes, carry out dynamic assignment according to the demand realization I/O resource of system, the platform of an operability is provided for leading subscriber simultaneously.
Description of drawings
Fig. 1 is the structural representation of the many virtual shared systems of I/O;
Fig. 2 is that many of the present invention share a SR-IOV equipment synoptic diagram;
Fig. 3 is an I/O resources allocation hoist pennants of the present invention;
Fig. 4 is an I/O initializing resource allocation list synoptic diagram of the present invention;
Fig. 5 is I/O resource dynamic recovery process figure of the present invention;
Fig. 6 is an I/O resource dynamic reallocation process flow diagram of the present invention;
Fig. 7 is an I/O method for managing resource synoptic diagram of the present invention.
Embodiment
Provide embodiment of the present invention below, the present invention has been made detailed description in conjunction with accompanying drawing.
Cause system's conflict and competition when avoiding a plurality of root nodes to share an I/O equipment, the invention provides a kind of I/O method for managing resource that is used for the many virtual shared systems of I/O.As shown in Figure 7, said I/O method for managing resource is meant and utilizes a main control root node that all the I/O equipment in the many virtual shared systems of IO are carried out centralized initial configuration and allocation manager.It comprises following characteristic:
A) having only the main control root node to enumerate finds and initial configuration I/O device resource.System powers on; The root node that starts at first utilizes the system initialization software of ready-made standard that all the PCIe equipment in the system are searched for discovery; Have only the main control root node can enumerate each I/O equipment of discovery, and dispose resources such as corresponding I/O address space, memory address space and interruption for each I/O device initialize.
B) the main control root node is through the PCIe administration module, and the I/O device resource in auxiliary management user management and the control system is carried out the I/O resource allocation policy that leading subscriber is formulated.
C) the main control root node is through PCIe administration module and I/O resource allocation table, and the mapping relations of apparatus for establishing function and the root node under it realize the distribution of I/O resource dynamic.
Said PCIe administration module is characterized in that: all PCIe module informations and present to leading subscriber in its collection system, resource allocation policy is formulated or revised to auxiliary leading subscriber.Simultaneously, the PCIe administration module is according to user's resource allocation policy, and the transmitting apparatus distribution instruction is rewritten the I/O resource allocation table, realizes the allocation manager of I/O resource.
Said PCIe assembly includes but not limited to root nodes all in the system and all I/O equipment.Said root node information includes but not limited to: the I/O resource that the number of root node, each root node have and the load condition of each root node.Said I/O facility information includes but not limited to: functions of the equipments ID identifier (like B/D/F), functions of the equipments descriptor (comprising vendor id, device id, revision ID etc.) and functions of the equipments take situation etc.
Said I/O resource allocation table is characterized in that: said resource allocation table is arranged in each PCIe downstream port of the many virtual shared control units of I/O, the corresponding I/O resource allocation table of each I/O equipment; Said resources allocation table record the mapping relations of the root node under functions of the equipments and its.Wherein, Table index is functions of the equipments ID number in main control root node PCIe territory (like function number), the table clause content description root node sign ID and ID number (like the Bus number Bus/ device number Device/ function Function) in affiliated root node PCIe territory thereof under the functions of the equipments.
Fig. 1 has described the structural representation of the many virtual shared systems of I/O.The many virtual shared systems of I/O mainly comprise three parts: root node subsystem, I/O equipment subsystem and the virtual shared control unit of Duo Gen I/O.The many virtual shared control units of IO are coupled root node subsystem and I/O equipment subsystem through the PCIe interface protocol, realize that an I/O device resource is directly shared by a plurality of root nodes.
Root node subsystem in many virtual shared systems of I/O comprises a plurality of root nodes, each root node by root complex (Root Complex, RC) and the CPU that connects group (CPU set) and internal memory (Mem) composition.Wherein, operation have the root node of PCIe management related software be referred to as the main control root node (Master Root Node, mRN), the main control root node has only one (hereinafter uses the mRN0 sign), comprises one group of PCIe management software; It has absolute management control right to all the I/O device resources in the system, and the resource allocation policy of formulating according to the user, is unit with functions of the equipments with the hardware resource of I/O equipment in the system, dynamically distributes to other root nodes.Other root nodes be called the subordinate root node (Slave Root Node, sRN), that the subordinate root node can have is a plurality of, and (hereinafter uses sRN1; SRN2;, sRNn sign), and according to the distribution of main control root node; The independent right to use that has certain I/O resource can and only can use the master control root node to distribute to its I/O device resource.(Virtual Machine, VM), (Virtual Machine Manager, VMM) the I/O resource of responsible scheduling main control root node distribution is that each VM is used to the Virtual Machine Manager program can to move a plurality of isomorphisms or isomery virtual machine on the root node.
I/O equipment subsystem in many virtual shared systems of I/O comprises a plurality of I/O equipment; They possess the ability that service is provided for a plurality of virtual machines simultaneously; Can be to comprise a physical function (Physical Function; PF) and corresponding a plurality of virtual functions (Virtual Function, SR-IOV equipment VF) or comprise a plurality of PF and the SR-IOV equipment of corresponding a plurality of VF also can be multi-functional I/O equipment etc.
The virtual shared control unit bag of many I/O in many virtual shared systems of I/O is made up of several PCIe upstream ports (PCIe Upstream Port), the many root switch of PCIe and three parts of several PCIe downstream ports (PCIe Downstream Port).Wherein, the PCIe upstream port comprises the PCIe controller of the PCIe port type definition in accord with PCI-Express fundamental norms, and it is responsible for the interconnection with the root node subsystem, and the conversion of transaction packet between the single environment of PCIe and many environment of PCIe; The many root switch of PCIe, essence are by the switch of N+M port of a plurality of PCI bridges foundation, through set up the Virtual PC Ie switch of a 1+M port for each root node, realize that each root node is connected with the logic of M I/O equipment; The PCIe downstream port; The PCIe controller and direct two funtion parts of the virtual interfacing equipment of I/O that comprise the PCIe port type definition in accord with PCI-Express fundamental norms; Be responsible for interconnection with the I/O equipment subsystem; And the conversion of transaction packet between the single environment of PCIe and many environment of PCIe, realize that each root node directly visits physical I/O functions of the equipments.
Fig. 2 has described the synoptic diagram that a plurality of root nodes are shared a SR-IOV equipment.A plurality of root nodes are shared the SR-IOV device resource that is connected the PCIe downstream port through the many root switch of PCIe.When system start-up, all with attempting enumerating the I/O equipment that connects under the many root switch of PCIe, essence is to enumerate the same I/O equipment that connects under the PCIe downstream port to each root node.This will cause system competition, and root node can influence the operation of other root nodes to the modification of SR-IOV equipment, finally causes system's cisco unity malfunction.Therefore; Conflict and competition for fear of each system; Realize that simultaneously a SR-IOV device resource can be shared by a plurality of root node; The present invention utilizes a main control root node mRN0 that SR-IOV equipment is controlled and managed, and is subordinate root node distributing equipment through equipment I/O resource allocation table.The I/O resource allocation table is arranged in each PCIe downstream port of the many virtual shared control units of I/O, the corresponding I/O resource allocation table of each I/O equipment.The functions of the equipments of distributing to it that write down in the equipment I O resource allocation table can only found and use to the subordinate root node.
The I/O resource allocation table is as shown in Figure 3, and list item has write down the mapping relations of functions of the equipments and the root node under it.The corresponding I/O resource allocation table of each equipment of the many virtual shared systems of I/O; Wherein table index is functions of the equipments at the identifier in main control root node PCIe territory (like function number), the table clause content description root node sign ID and the signs in subordinate root node PCIe territory thereof under the functions of the equipments.Through configuration I/O resource allocation table, be that unit is mounted to each root node with functions of the equipments with the I/O resource of an equipment, and then set up accordingly independently PCIe topological structure for each root node, realized a plurality of root nodes shared to equipment I/O resource.
As shown in Figure 2, when the root node subsystem powered on, root node started and utilizes the system initialization software of ready-made standard that SR-IOV equipment is searched for discovery and initial configuration.Yet, because this moment, equipment I O resource allocation table did not write down the assignment information of any functions of the equipments, except main control root node mRN0, all subordinate root nodes (sRN1, sRN2 ..., sRNn) all can not find function in the SR-IOV equipment.After system start-up is accomplished; Main control root node mRN0 is according to the user resources allocation strategy; Through configuration device IO resource allocation table recording unit function assignment information, be that unit (virtual functions) distributes to the subordinate root node with functions of the equipments with SR-IOV device hardware resource.After device initialize had assigned, the subordinate root node was directed carrying out the rescanning of PCIe equipment.Through equipment I/O resource allocation table, the subordinate root node can find to distribute the virtual functions in the SR-IOV equipment that obtains.Accomplish the rescanning of PCIe equipment when the subordinate root node, load corresponding virtual functions VF and drive, promptly can use specific virtual functions, and then realize that many of SR-IOV device resource share.
A kind of I/O method for managing resource that is used for the many virtual shared systems of I/O provided by the invention can be realized the dynamic assignment of I/O resource between a plurality of root nodes according to the resource allocation policy of user's formulation.Said I/O resource dynamic is distributed and is comprised that the I/O initializing resource distributes, and the I/O resource reclaims and the I/O redistribute resources.
Fig. 4 has described and has utilized the process flow diagram of main control root node to the configuration of I/O initializing resource.Said I/O initializing resource configuration; Finger is when system start-up; The main control root node is enumerated all I/O equipment in discovery and the initial configuration system, and according to the I/O resource allocation policy that leading subscriber is formulated, is each subordinate root node distributing equipment function; Set up the process of initial PCIe topological structure, it may further comprise the steps:
At first, the root node subsystem powers on, and the root node of startup at first utilizes the system initialization software of ready-made standard that all the PCIe equipment in the system are searched for and finds and initial configuration.During the device initialize, the configuration space of each function in the system configuration softward interview equipment ID of distribution function in system number, distributes resources such as corresponding I/O address space, memory address space and interruption according to its resource requirement simultaneously for it.At system's electrifying startup initial stage, have only the main control root node can find with initial configuration I/O subsystem in each I/O equipment, and be the corresponding I/O resource allocation table allocate memory address of each I/O equipment.
After main control root node initializers are accomplished device discovery and configuration, all PCIe module informations and present to leading subscriber in the PCIe management software collection system of moving it on, auxiliary leading subscriber carries out the formulation of resource allocation policy.The PCIe assembly of said collection includes but not limited to root nodes all in the system and all I/O equipment.Said root node information includes but not limited to: the I/O resource that the number of root node, each root node have and the load condition of each root node.Said I/O facility information includes but not limited to: functions of the equipments ID identifier (like B/D/F), functions of the equipments descriptor (comprise vendor id; Device id, revision ID etc.), the attribute (like multifunctional equipment or SR-IOV equipment etc.) and the functions of the equipments of equipment take situation etc.
Then, leading subscriber is formulated initial allocation strategy according to the demand and the existing I/O resource of each root node, and through PCIe management software transmitting apparatus distribution instruction.
After the PCIe management software receives instruction, distribute transaction packet to carry out the resource allocation policy of leading subscriber through transmitting apparatus.Said devices allocation transaction packet; Be that the PCIe internal memory is write transaction packet, it indicated root node ID number of wanting under apparatus operating functional identity number (in main control root node PCIe territory ID number), these functions of the equipments with and in affiliated root node PCIe territory ID number.Wherein, affiliated root node ID number is subordinate root node ID number, indicates a devices allocation instruction.
The PCIe downstream port receives the said equipment and distributes transaction packet, resolve transaction packet obtain want apparatus operating functional identity number, its affiliated root node ID number with and in affiliated root node PCIe territory ID number; And will be by the root node ID under the functions of the equipments number and its ID component content in affiliated root node PCIe territory; Write in the corresponding list item of I/O resource allocation table of the functions of the equipments ID number indication that will distribute, and then specified the I/O functions of the equipments of distribution for each subordinate root node.
After the main control root node was accomplished the I/O device resource initialization distribution to the subordinate root node, each subordinate root node was directed carrying out the rescanning of PCIe equipment.Each subordinate root node can find to distribute the functions of the equipments that obtain according to the I/O resource allocation table, and is distributed in resources such as in the local PCIe territory ID number, IO address space, memory address space and interruption according to its resource requirement for it.
The many virtual shared systems of I/O can dynamically be carried out system equipment and upgrade upgrading, and existing I/O resource is redistributed under the situation that does not influence other root node work in the course of the work.No matter be redistributing of renewal of the equipment upgrading or existing equipments resources, essence all is the process that increases the relevant device function from root node deletion relevant device function with to root node.The invention provides a kind of I/O resource dynamic distributing method, can under the situation that does not influence other root node work, increase the I/O functions of the equipments from subordinate root node deletion I/O functions of the equipments or to the subordinate root node.Be referred to as the I/O resource from subordinate root node deletion I/O functions of the equipments and reclaim, the process that increases the I/O functions of the equipments to the subordinate root node is referred to as the I/O redistribute resources.
Fig. 5 has described the process flow diagram that the I/O resource reclaims, and its process is described below:
At first, leading subscriber is equipped with from certain certain equipment merit of subordinate root node deletion according to the demand decision, and through PCIe management software transmitting apparatus recovery command.
The PCIe management software distributes transaction packet through transmitting apparatus then, carries out the resource recovery command of leading subscriber.Said devices allocation transaction packet; Be that the PCIe internal memory is write transaction packet, under it has indicated the I/O functions of the equipments that will operate ID number (in main control root node PCIe territory ID number), these functions of the equipments root node ID number with and in affiliated root node PCIe territory ID number.Wherein, root node ID number under the function is main control root node ID number, indicates an equipment recovery command.
When PCIe downstream port receiving equipment distributes transaction packet, resolve transaction packet obtain want apparatus operating functional identity number, its affiliated root node ID number with and in affiliated root node PCIe territory ID number.And affiliated root node ID judged, if the affiliated root node ID that indicates in the configuration transaction bag is main control root node ID, indicate an equipment recovery command.Then, read the corresponding list item of I/O resource allocation table that transaction packet is wanted number indication of apparatus operating functional identity, and send a virtual hot plug incident to the subordinate root node of list item indication, notice has the I/O functions of the equipments to be pulled out.Simultaneously, will be complete zero functional identity component content with value ID number by the main control root node, write in the corresponding list item of I/O resource allocation table of wanting number indication of apparatus operating functional identity.
After target subordinate root node receives above-mentioned virtual hot plug incident; According to the entry-into-force time of this request of system running state decision; Then these functions of the equipments are removed from system, and the relevant driver of unloading, the affairs that stop all uncompleted affairs and will generate.
Fig. 6 has described the process flow diagram of I/O redistribute resources, and its process is described below:
At first decision increases certain functions of the equipments to certain subordinate root node to leading subscriber according to demand, and through PCIe management software transmitting apparatus recovery command
The PCIe management software distributes transaction packet through transmitting apparatus then, carries out the redistribute resources instruction of leading subscriber.Said devices allocation transaction packet; Be that the PCIe internal memory is write transaction packet, under it has indicated the I/O functions of the equipments that will operate ID number (in main control root node PCIe territory ID number), these functions of the equipments root node ID number with and in affiliated root node PCIe territory ID number.Wherein, root node ID number under the function is subordinate root node ID number, indicates a devices allocation instruction.
When PCIe downstream port receiving equipment distributes transaction packet, resolve transaction packet obtain want apparatus operating functional identity number, its affiliated root node ID number with and in affiliated root node PCIe territory ID number.And affiliated root node ID judged, if the affiliated root node ID that indicates in the configuration transaction bag is not main control root node ID, indicate an equipment recovery command.Then, to virtual hot plug incident of subordinate root node transmission of transaction packet indication, the corresponding subordinate root node of notice has I/O equipment to insert its PCIe topological structure.Simultaneously; Will be by the root node ID under the functions of the equipments number and its ID component content in affiliated root node PCIe territory; Write in the corresponding list item of I/O resource allocation table of wanting number indication of apparatus operating functional identity, and then be that this subordinate root node increases I/O functions of the equipments of distribution.
After target subordinate root node receives above-mentioned virtual hot plug incident, according to the entry-into-force time of this request of system running state decision, then this equipment is scanned and initial configuration, and load the corresponding driving program.
Those skilled in the art can also carry out various modifications to above content under the condition that does not break away from the definite the spirit and scope of the present invention of claims.Therefore scope of the present invention is not limited in above explanation, but confirm by the scope of claims.
Claims (8)
1. an I/O method for managing resource that is used for the many virtual shared systems of I/O is characterized in that, comprising:
Step 1, main control root node are enumerated the I/O resource in the system and are found and initial configuration;
Step 2, main control root node are through the PCIe administration module, and the I/O device resource in auxiliary management user management and the control system is carried out the I/O resource allocation policy that leading subscriber is formulated;
Step 3, main control root node are through PCIe administration module and I/O resource allocation table, and the mapping relations of apparatus for establishing function and the root node under it realize the distribution of I/O resource dynamic.
2. the I/O method for managing resource that is used for the many virtual shared systems of I/O as claimed in claim 1 is characterized in that said step 2 comprises:
Step 21, all PCIe module informations and present to leading subscriber in the PCIe administration module collection system, auxiliary leading subscriber initialization or revise resource allocation policy;
Step 22, PCIe administration module be according to user's resource allocation policy, and the transmitting apparatus distribution instruction realizes the allocation manager of I/O resource.
3. the I/O method for managing resource that is used for the many virtual shared systems of I/O as claimed in claim 2 is characterized in that, said PCIe module information comprises:
Root node information, said root node information comprises the number of root node, I/O resource that each root node has and the load condition of each root node;
The I/O facility information, said I/O facility information comprises that functions of the equipments ID number, functions of the equipments descriptor and functions of the equipments take situation.
4. the I/O method for managing resource that is used for the many virtual shared systems of I/O as claimed in claim 1 is characterized in that, said I/O resource allocation table comprises:
Said resource allocation table is arranged in each PCIe downstream port of the many virtual shared control units of I/O, the corresponding I/O resource allocation table of each I/O equipment; Said resources allocation table record the mapping relations of the root node under functions of the equipments and its; Wherein, table index is functions of the equipments ID numbers in main control root node PCIe territory, the table clause content description root node sign ID and ID number in affiliated root node PCIe territory thereof under the functions of the equipments.
5. the I/O method for managing resource that is used for the many virtual shared systems of I/O as claimed in claim 1 is characterized in that, the I/O resource dynamic in the said step 3 is distributed and comprised:
The I/O initializing resource distributes, and said I/O initializing resource distributes and refers to that when system initialization the main control root node is each subordinate root node distributing equipment function, sets up the process of initial PCIe topological structure;
The I/O resource reclaims, and said I/O resource reclaims and refers under the situation that does not influence other root node work, and the main control root node is in the process of subordinate root node deletion I/O functions of the equipments;
I/O redistribute resources, said I/O redistribute resources refer to that under the situation that does not influence other root node work the main control root node increases the process of I/O functions of the equipments to the subordinate root node.
6. the I/O method for managing resource that is used for the many virtual shared systems of I/O as claimed in claim 5 is characterized in that, said I/O initializing resource distributes and comprises:
Step 61, leading subscriber is formulated initial allocation strategy according to the demand of root node and the I/O resource of system, and through PCIe administration module transmitting apparatus distribution instruction;
Step 62, the PCIe administration module distributes transaction packet through transmitting apparatus, carries out the resource allocation policy of leading subscriber; Said devices allocation transaction packet; Be that the PCIe internal memory is write transaction packet; Said PCIe internal memory is write transaction packet and has been indicated and want apparatus operating functional identity number, promptly the sign of the root node under ID number in main control root node PCIe territory, these functions of the equipments ID with and in affiliated root node PCIe territory ID number; Wherein, affiliated root node ID number is subordinate root node ID number, indicates a devices allocation instruction;
Step 63, PCIe downstream port receive the transaction packet of devices allocation described in the step 62, resolve transaction packet obtain want apparatus operating functional identity number, the root node under it identify ID with and in affiliated root node PCIe territory ID number; And will be by the sign of the root node under functions of the equipments ID and its ID component content in affiliated root node PCIe territory; Write in the corresponding list item of I/O resource allocation table of wanting number indication of apparatus operating functional identity, and then specified the I/O functions of the equipments of distribution for each subordinate root node;
After step 64, main control root node were accomplished the I/O device resource initialization distribution to the subordinate root node, the subordinate root node was directed carrying out the rescanning of PCIe equipment, and discovery and initial configuration are distributed the functions of the equipments that obtain.
7. the I/O method for managing resource that is used for the many virtual shared systems of I/O as claimed in claim 5 is characterized in that, said I/O resource reclaims and comprises:
Step 71, leading subscriber determines from certain certain functions of the equipments of root slave node deletion, through PCIe management software transmitting apparatus recovery command according to demand;
Step 72, the PCIe administration module distributes transaction packet through transmitting apparatus, carries out the resource recovery command of leading subscriber; Said devices allocation transaction packet is that the PCIe internal memory is write transaction packet, said PCIe internal memory write the things bag indicated under I/O functions of the equipments ID number that will operate, these functions of the equipments root node ID number with and in affiliated root node PCIe territory ID number; Wherein, the root node sign ID under the function indicates an equipment recovery command for main control root node sign ID;
Step 73, PCIe downstream port receiving equipment are distributed transaction packet, resolve transaction packet obtain want apparatus operating functional identity number, the root node under it identify ID with and in affiliated root node PCIe territory ID number;
Step 74, affiliated root node sign ID judges; If the affiliated root node sign ID that indicates in the configuration transaction bag indicates an equipment recovery command for main control root node sign ID;
Step 75 reads the corresponding list item of I/O resource allocation table that transaction packet is wanted number indication of apparatus operating functional identity, and to virtual hot plug incident of subordinate root node transmission of list item indication, notice has the I/O functions of the equipments to be pulled out;
Step 76, the corresponding list item of I/O resource allocation table of the functions of the equipments ID of reset operation number indication; To be complete zero functional identity component content with value by main control root node sign ID, write in the corresponding list item of I/O resource allocation table of wanting number indication of apparatus operating functional identity;
Step 77, target subordinate root node receives this hot plug incident, this equipment removed from the PCIe topological structure, and unloading corresponding driving program.
8. the I/O method for managing resource that is used for the many virtual shared systems of I/O as claimed in claim 5 is characterized in that, said I/O redistribute resources comprises:
Step 81, leading subscriber increases certain equipment merit fully according to demand decision and indication to certain subordinate root node, through PCIe management software transmitting apparatus reallocation instruction;
Step 82, the PCIe administration module distributes transaction packet through transmitting apparatus, carries out the redistribute resources instruction of leading subscriber; Said devices allocation transaction packet; Be that the PCIe internal memory is write transaction packet; Said PCIe internal memory is write transaction packet and has been indicated the I/O functions of the equipments that will operate ID number, promptly the sign of the root node under ID number in main control root node PCI e territory, these functions of the equipments ID with and in affiliated root node PCIe territory ID number; Wherein, the root node sign ID under the function is subordinate root node sign ID, indicates a devices allocation instruction;
Step 83, PCIe downstream port receiving equipment are distributed transaction packet, resolve transaction packet obtain want apparatus operating functional identity number, the root node under it identify ID with and in affiliated root node PCIe territory ID number;
Step 84, affiliated root node sign ID judges; If the affiliated root node ID that indicates in the configuration transaction bag is non-main control root node ID, indicate a devices allocation instruction;
Step 85, to virtual hot plug incident of subordinate root node transmission of transaction packet indication, the corresponding subordinate root node of notice has I/O equipment to insert its PCIe topological structure; Simultaneously; Will be by the sign of the root node under functions of the equipments ID and its ID component content in affiliated root node PCIe territory; Write in the corresponding list item of I/O resource allocation table of wanting number indication of apparatus operating functional identity, and then be that this subordinate root node increases I/O functions of the equipments of distribution;
Step 86, target subordinate root node receives the hot plug incident, this equipment is scanned and initial configuration, and load the corresponding driving program.
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