WO2016119469A1

WO2016119469A1 - Service context management method, physical main machine, pcie device and migration management device

Info

Publication number: WO2016119469A1
Application number: PCT/CN2015/089815
Authority: WO
Inventors: 卢胜文
Original assignee: 华为技术有限公司
Priority date: 2015-01-27
Filing date: 2015-09-16
Publication date: 2016-08-04
Also published as: CN104636185A; CN104636185B

Abstract

A service context management method, a physical main machine, a PCIE device and a migration management device, which belong to the field of virtual machines and are applicable to virtual machines. A virtual machine is run on a physical main machine, the physical main machine is connected to a peripheral component interconnection express (PCIE) device, the PCIE device is a hardware device that satisfies a single-root input/output virtualization (SR-IOV) standard, and the PCIE device comprises at least one physical function (PF) and at least one virtual function (VF), wherein each of the PFs and each of the VFs are both configured with a unique functional number. The method comprises: a virtual machine allocates a memory to at least one state unloading service borne by a PCIE device (101); the virtual machine generates a context table in the memory, wherein the context table is used for recording service context of the at least one state unloading service borne by the PCIE device (102); and the virtual machine sends a first address of the memory and a functional number to the PCIE device (103).

Description

Business context management method, physical host, PCIE device, and migration management device

This application claims the priority of the Chinese patent application filed on January 27, 2015, the Chinese Patent Office, the application number is 201510041218.6, and the invention name is "business context management method, physical host, PCIE device and migration management device". This is incorporated herein by reference.

Technical field

The present invention relates to the field of virtual machines, and in particular, to a service context management method, a physical host, a PCIE device, and a migration management device.

Background technique

In a typical virtual machine application architecture, a virtual machine manager (English: Virtual Machine Manager, VMM for short) is installed on a physical host, and one or more virtual machines are managed by the VMM. The operating system (English: Operating System, OS for short) and various applications can be run on the machine. The hardware of the general physical host mainly includes: some hardware related to running the virtual machine, such as a central processing unit (English: Central Processing Unit, CPU), memory, hard disk, etc., and some are not directly used to run the virtual machine, but A hardware that performs some specific services and is relatively independent in function, such as a Peripheral Component Interconnection Express (PCIE) device (such as a network card adapter, a graphics card, etc.) in a physical host.

Single-Root I/O Virtualization (English: Single-Root I/O Virtualization, SR-IOV for short) is an input/output (English: Input/output, I/O) virtualization technology. A virtual PCIE adapter is virtualized on a physical PCIE adapter, which is called a virtual function (English: Virtual Function, VF for short). Take the NIC adapter that supports SR-IOV as an example. A physical NIC adapter can virtualize multiple virtual NIC adapters. The VF in each virtual machine corresponds to a virtual NIC adapter.

After the server is virtualized, it can easily implement virtual machine hot migration. The virtual machine hot migration technology refers to the transfer of virtual machines from one physical host to another through hot migration, and the migration process has little impact on business processing.

In the process of implementing the present invention, the inventors have found that the prior art has at least the following problems:

In the prior art, in addition to the need to migrate the data stored in the memory to the target physical host, the virtual machine needs to migrate the state data stored in the register on the PCIE adapter or the internal memory to the target physical host. The registers or memory are typically configured to hold the context of the state offloaded service handled by the PCIE adapter, and the context of the state offload service is used for traffic statistics, control, and business status records. However, the registers that hold the context of the service are very scattered. If you perform hot migration, the storage and recovery of these registers or memories need to be saved and restored independently, which is very troublesome.

Summary of the invention

In order to solve the problem of the prior art, the embodiment of the present invention provides a service context management method, a physical host, a PCIE device, and a migration management device. The technical solution is as follows:

In a first aspect, an embodiment of the present invention provides a service context management method, which is applicable to a virtual machine, where the virtual machine runs on a physical host, and the physical host is connected to a shortcut peripheral component to connect with a standard PCIE device, and the PCIE The device is a hardware device conforming to a single input/output virtualized SR-IOV standard, the PCIE device including at least one physical function PF and at least one virtual function VF, wherein each PF and each VF are configured with unique functions No. The method includes:

The virtual machine allocates memory for at least one state offload service carried by the PCIE device;

The virtual machine generates a context table in the memory, where the context table is used to record a service context of at least one state offload service carried by the PCIE device;

The virtual machine sends the first address of the memory and the function number corresponding to the virtual machine to the PCIE device.

In a first possible implementation manner of the first aspect, the context table is a direct index table or a hash table, where the direct index table includes a correspondence between a keyword KEY and a service context, and the hash table includes a And the at least one state offload service includes a to-be-processed state offload service, where the method further includes:

Receiving, by the PCIE device, a request message for acquiring a service context of the to-be-processed state offload service, where the request message includes a first address of the memory and a keyword KEY;

Determining a corresponding direct index table or a hash table according to the first address of the memory in the request message;

Reading a service context from the determined direct index table corresponding to the first address of the memory according to the KEY in the request message, or calculating a hash value C according to the KEY in the request message, Using the hash value C to read the service context from the determined hash table corresponding to the first address of the memory;

The read service context is sent to the PCIE device.

According to a first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the calculating the hash value C according to the KEY in the request message includes:

Using a hash function to convert the KEY in the request message into a total hash value A;

Obtaining a size H of a hash bucket corresponding to the virtual machine in the hash table corresponding to the first address of the memory, or a hash bucket corresponding to the VF corresponding to the unloading service to be processed;

Using the total hash value A, the size M of the hash bucket is modulo, and the hash value C is obtained.

According to the first or second possible implementation manner of the first aspect, in the third possible implementation manner of the first aspect, the sending the read service context to the PCIE device includes:

The read service context is written into the cache of the PCIE device by means of a cache Cache mechanism.

In a second aspect, the embodiment of the present invention further provides a service context management method, which is applicable to a PCIE device, where the PCIE device is connected to a physical host, and the PCIE device is a single input/output virtualized SR-IOV standard. a hardware device, the PCIE device includes at least one physical function PF and at least one virtual function VF, wherein each PF and each VF is configured with a unique function number, and the physical host runs at least one virtual machine. The methods include:

Receiving, by the PCIE device, service information of a to-be-processed offload service sent by the host side or the network side;

Determining, by the PCIE device, a function number corresponding to the to-be-processed unloading service according to the service information of the offloading service in the to-be-processed state;

Determining, by the PCIE device, a first address of a memory corresponding to the unloading service to be processed according to the determined function number of the unloading service and the corresponding relationship between the function number and the first address of the memory. A context table is saved, where the context table is used to record a service context of a state offload service carried by the PCIE device;

The PCIE device acquires a KEY from the service information of the offloaded service in the to-be-processed state;

The PCIE device acquires a service context of the to-be-processed offload service according to the first address of the memory corresponding to the unloading service and the KEY according to the to-be-processed state.

In a first possible implementation manner of the second aspect, the context table is a direct index table or a hash table, where the direct index table includes a correspondence between a keyword KEY and a service context, and the hash table includes a Corresponding relationship between the hash value and the service context, the first address of the memory corresponding to the unloading service according to the to-be-processed state, and the service context of the KEY to obtain the unloading service of the to-be-processed state, including:

The first address of the memory corresponding to the unloading service in the to-be-processed state is used to search for a corresponding direct index table or a hash table in the memory of the virtual machine;

Using the KEY to directly read the service context in the direct index table corresponding to the first address of the found memory, or calculate the hash value C according to the KEY, and use the hash value C to read the found context. The business context in the hash table corresponding to the first address of the memory.

According to a first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the calculating the hash value C according to the KEY includes:

According to the second aspect or the first or second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the first end of the memory corresponding to the unloading service according to the to-be-processed state The address and the KEY acquire the service context of the to-be-processed unloading service, including:

Sending, by the virtual machine corresponding to the determined function number corresponding to the offloading service, the request message for acquiring the service context of the to-be-processed state unloading service, where the request message includes the to-be-processed state Unloading the first address of the memory corresponding to the service and the KEY;

Receiving, by the virtual machine, the service context of the offloaded service according to the to-be-processed state sent by the request message.

According to the second aspect or the first or second possible implementation manner of the second aspect, in the fourth possible implementation manner of the second aspect, the determining, according to the to-be-processed state, service information The function number corresponding to the processing status unloading service, including:

Determining the unloading service to be processed according to the feature in the service information of the to-be-processed state offloading service sent by the host side or the PCIE interface used by the host side to transmit the service information of the to-be-processed state offloading service Corresponding function number, the feature is used to indicate a function number corresponding to the to-be-processed state unloading service.

According to the second aspect or the first or second possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the method further includes:

The PCIE device receives a first address of a memory of each virtual machine and a function number corresponding to each virtual machine;

The correspondence between the first address of the memory and the function number is saved.

In a third aspect, an embodiment of the present invention further provides a service context management method, where the method includes:

During hot migration, the migration management device in the destination physical host acquires the first address of the memory copied from the source physical host memory, and the destination physical host and the source physical host respectively interconnect the standard PCIE with different shortcut peripheral components. Device connection, the PCIE device is a hardware device supporting a single input and output virtualization SR-IOV standard, the PCIE device includes at least one physical function PF and at least one virtual function VF, wherein each PF and each VF All are configured with a unique function number;

Obtaining the function number corresponding to the migrated virtual machine;

And mapping a correspondence between the first address of the memory and the function number to a PCIE device of the destination physical host.

In a fourth aspect, the embodiment of the present invention further provides a physical host, where the virtual host runs a virtual machine, and the physical host is connected to a fast peripheral component to connect with a standard PCIE device, and the PCIE device supports a single root. Input and output virtualized SR-IOV standard hardware devices, the PCIE device including at least one physical function PF and at least one virtual function VF, wherein each PF and each VF is configured with a unique function number, the virtual machine include:

An allocating module, configured to allocate memory for at least one state offloading service carried by the PCIE device;

a generating module, configured to generate a context table in the memory, where the context table is used to record a service context of at least one state offload service carried by the PCIE device;

And a sending module, configured to send the first address and the function number of the memory to the PCIE device.

In a first possible implementation manner of the fourth aspect, the context table is a direct index table or a hash table, where the direct index table includes a correspondence between a keyword KEY and a service context, and the at least one state offloading service Including a pending state unloading service, the hash table including a hash value The virtual machine further includes:

a receiving module, configured to receive a request message sent by the PCIE device to obtain a service context of the to-be-processed state offload service, where the request message includes a first address of the memory and a keyword KEY;

a determining module, configured to determine, according to the first address of the memory in the request message, a corresponding direct index table or a hash table;

a reading module, configured to read a service context from the determined direct index table corresponding to the first address of the memory according to the KEY in the request message, or calculate a hash value C according to the KEY in the request message, Using the hash value C to read the service context from the determined hash table corresponding to the first address of the memory;

The sending module is further configured to send the read service context to the PCIE device.

According to a first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the reading module is specifically configured to:

Using a hash function, the KEY in the request message is converted into a total hash value A; and the hash bucket corresponding to the virtual machine in the hash table corresponding to the determined first address of the memory is obtained or the to-be-processed The size M of the hash bucket corresponding to the VF corresponding to the state unloading service; the total hash value A is used to modulo the size M of the hash bucket to obtain the hash value C.

According to the first or second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the sending module is specifically configured to: use the read service context to pass the cache The way of the Cache mechanism is written into the cache of the PCIE device.

In a fifth aspect, the embodiment of the present invention further provides a PCIE device, where the PCIE device is connected to a physical host, and the PCIE device is a hardware device supporting a single input and output virtualized SR-IOV standard, and the PCIE device is Included in the at least one physical function PF and at least one virtual function VF, wherein each PF and each VF is configured with a unique function number, and the physical host runs at least one virtual machine, and the PCIE device includes:

a receiving module, configured to receive service information of a to-be-processed unloading service sent by the host side or the network side;

a first determining module, configured to determine, according to the service information of the offloading service in the to-be-processed state, a function number corresponding to the to-be-processed state unloading service;

a second determining module, configured to uninstall a function corresponding to the service according to the determined to-be-processed state And a first address of the memory corresponding to the unloading service in the to-be-processed state, where the memory stores a context table, where the context table is used to record the bearer of the PCIE device. Status unloads the business context of the business;

a first obtaining module, configured to obtain a KEY from the service information of the to-be-processed state offloading service;

The second obtaining module is configured to acquire, according to the to-be-processed state, the first address of the memory corresponding to the unloading service and the KEY to obtain the service context of the to-be-processed state offloading service.

In a first possible implementation manner of the fifth aspect, the context table is a direct index table or a hash table, where the direct index table includes a correspondence between a keyword KEY and a service context, and the hash table includes a The correspondence between the hash value and the service context, where the second acquiring module is specifically configured to:

The first address of the memory corresponding to the unloading service in the to-be-processed state is used to search for a corresponding direct index table or a hash table in the memory of the virtual machine; and the first address corresponding to the memory that is found by using the KEY is directly read. Directly indexing the business context in the table, or calculating the hash value C according to the KEY, and using the hash value C to read the searched service context in the hash table corresponding to the first address of the memory.

According to a first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect, the second acquiring module is specifically configured to:

According to the fifth aspect or the first or second possible implementation manner of the fifth aspect, in a third possible implementation manner of the fifth aspect, the second acquiring module is specifically configured to:

Sending, by the virtual machine corresponding to the determined function number corresponding to the offloading service, the request message for acquiring the service context of the to-be-processed state unloading service, where the request message includes the to-be-processed state Unloading the first address of the memory corresponding to the service and the KEY; receiving the service context of the virtual machine offloading the service according to the to-be-processed state sent by the request message.

According to the fifth aspect or the first or second possible implementation manner of the fifth aspect, in the fourth possible implementation manner of the fifth aspect, the first determining module is specifically configured to: according to the host side The PCIE interface used in the service information of the to-be-processed state offload service or the service information on the host side to transmit the service information of the to-be-processed offload service determines the to-be-supplied A function number corresponding to the unloading service of the state, the feature is used to indicate a function number corresponding to the unloading service of the to-be-processed state.

According to the fifth aspect or the first or second possible implementation manner of the fifth aspect, in a fifth possible implementation manner of the fifth aspect, the receiving module is further configured to receive a memory of each virtual machine a first address and a function number corresponding to each of the virtual machines;

The PCIE device further includes: a storage module, configured to save a correspondence between a first address of the memory and the function number.

In a sixth aspect, the embodiment of the present invention further provides a migration management device, where the migration management device is disposed in a destination physical host, where the migration management device includes:

a first obtaining module, configured to acquire a first address of the memory copied from the source physical host memory during the hot migration, where the destination physical host and the source physical host respectively interconnect the standard PCIE device with different shortcut peripheral components Connected, the PCIE device is a hardware device supporting a single input/output virtualized SR-IOV standard, the PCIE device including at least one physical function PF and at least one virtual function VF, wherein each PF and each VF Configured with a unique feature number;

a second acquiring module, configured to obtain the function number corresponding to the migrated virtual machine;

And a configuration module, configured to configure a correspondence between the first address of the memory and the function number to a PCIE device of the destination physical host.

In a seventh aspect, the embodiment of the present invention further provides a physical host, where the physical host includes: a processor, a memory, an input and output unit, and a bus; the memory is configured to store a computer to execute an instruction, the processor and the The memory is connected by the bus, and when the physical host is running, the processor executes the computer-executed instructions stored by the memory to cause the computer to perform the business context management provided by the foregoing first or third aspect method.

The beneficial effects brought by the technical solutions provided by the embodiments of the present invention are:

The virtual machine allocates memory for at least one state unloading service carried by the PCIE device, and then generates a context table in the memory, and then sends the first address of the memory and the function number corresponding to the virtual machine to the PCIE device, so that the PCIE device can record the first address of the memory. Corresponding relationship with the function number, and according to the correspondence between the first address of the memory and the function number, the business context of the state unloading service is obtained from the memory, the operation is convenient, and the speed is fast; when the virtual machine is hot-migrated, the register is avoided. Migration brings The trouble is that the memory is directly migrated to the destination physical machine, and the corresponding relationship between the function number of the virtual machine after the migration and the first address of the virtual machine in the source physical host is configured in the migrated PCIE device. The implementation is convenient and simple, greatly speeding up the hot migration of the virtual machine and shortening the downtime.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work.

FIG. 1 is an application scenario diagram provided by an embodiment of the present invention;

2 is a flowchart of a service context management method according to Embodiment 1 of the present invention;

3 is a flowchart of a service context management method according to Embodiment 2 of the present invention;

4 is a flowchart of a service context management method according to Embodiment 3 of the present invention;

FIG. 5 is a flowchart of a service context management method according to Embodiment 4 of the present invention; FIG.

6 is a structural block diagram of a physical host according to Embodiment 5 of the present invention;

7 is a structural block diagram of a physical host according to Embodiment 6 of the present invention;

8 is a structural block diagram of a PCIE device according to Embodiment 7 of the present invention;

9 is a structural block diagram of a PCIE device according to Embodiment 8 of the present invention;

FIG. 10 is a structural block diagram of a migration management device according to Embodiment 9 of the present invention.

detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

In order to facilitate the description of the embodiments, the application scenarios of the embodiments of the present invention are briefly described below. Referring to FIG. 1, a physical host runs a virtual machine manager VMM and at least one virtual machine. The VMM can manage one or more virtual machines, and each virtual machine can run an operating system OS and various applications. The physical host can be connected to a PCIE device, which is a hardware device that supports a single input-output virtualized SR-IOV standard. The PCIE device includes at least one physical function (English: Physical Function, PF for short) and at least one virtual function VF, wherein each PF and each VF is configured with a unique function number. The virtual machine performs a specific operation through PF or VF Service, each PF or VF corresponds to a virtual machine, and the correspondence between the function number of the PF or VF and the virtual machine can be saved in the PCIE device.

The physical host includes hardware associated with running the virtual machine, such as a CPU and at least one computer readable storage medium (hard disk, memory, etc.). In addition to this, the physical host may further include a communication unit, an input unit, a display unit, and the like. The aforementioned PCIE device may be a PCIE adapter, such as a network card adapter, a graphics card, or the like.

The physical host also includes a migration management device. When the virtual machine is hot migrated, the migration management device on the source physical host migrates the data stored in the memory to the target physical host. In one implementation, the migration management device can be implemented by the aforementioned VMM.

It should be noted that the types of the devices and the connection manners described above are only examples, and the present invention is not limited thereto.

Embodiment 1

An embodiment of the present invention provides a service context management method, which is performed by one of the foregoing at least one virtual machine. Referring to FIG. 2, the method includes:

Step 101: The virtual machine allocates memory for at least one state offload service carried by the PCIE device.

Step 102: The virtual machine generates a context table in the memory, where the context table is used to record a service context of at least one state offload service carried by the PCIE device.

Step 103: The virtual machine sends the first address of the memory and the function number corresponding to the virtual machine to the PCIE device. The PCIE device records the correspondence between the first address and the function number of the memory, and according to the correspondence between the first address of the memory and the function number. , get the business context of the business from the state of the unloaded business.

The present invention provides a service context management method, in which a virtual machine allocates memory for at least one state offload service carried by a PCIE device, and then generates a context table in the memory, and then sends the first address of the memory and the function number corresponding to the virtual machine to the PCIE. The device enables the PCIE device to record the correspondence between the first address and the function number of the memory, and obtains the service context of the state offload service from the memory according to the correspondence between the first address and the function number of the memory, which is convenient to operate and fast; When the virtual machine is hot-migrated, it avoids the trouble of register migration. It only needs to migrate the memory directly to the destination physical machine, and then the function number corresponding to the virtual machine after migration and the first address of the memory of the virtual machine in the source physical host. The corresponding relationship can be configured into the migrated PCIE device, which is convenient and simple to implement, greatly speeds up the hot migration of the virtual machine, and shortens the downtime.

Embodiment 2

An embodiment of the present invention provides a service context management method, which is performed by the foregoing PCIE device. Referring to FIG. 3, the method includes:

Step 201: The PCIE device receives the service information of the offloading service to be processed sent by the host side or the network side.

Step 202: The PCIE device determines the function number corresponding to the unloading service to be processed according to the service information of the offloading service in the to-be-processed state.

Step 203: The PCIE device saves the first address of the memory corresponding to the unloading service in the to-be-processed state according to the determined function number of the unloading service and the corresponding relationship between the function number and the first address of the memory, and the context table is saved in the memory. The context table is used to record the business context of the state offloading service carried by the PCIE device.

Step 204: The PCIE device acquires the KEY from the service information of the offloaded service in the to-be-processed state.

Step 205: The PCIE device acquires the service context of the unloaded service in the pending state according to the first address of the memory corresponding to the unloading service and the KEY.

The present invention provides a service context management method. The PCIE device determines the function number corresponding to the unloading service to be processed according to the service information of the unloading service to be processed, and the corresponding relationship between the function number and the first address of the memory, and the determined pending status. Unloading the first address of the memory corresponding to the service, and then obtaining the KEY from the service information of the unloaded service in the pending state, and unloading the business context of the service according to the first address of the memory and the KEY from the memory, the operation is convenient and the speed is fast; In the case of hot migration, the trouble of register migration is avoided, and the memory is directly migrated to the destination physical machine, and the function number corresponding to the virtual machine after migration and the first address of the memory of the virtual machine in the source physical host are The corresponding relationship can be configured into the migrated PCIE device, which is convenient and simple to implement, greatly speeds up the hot migration of the virtual machine, and shortens the downtime.

Embodiment 3

An embodiment of the present invention provides a service context management method, which is performed by the foregoing migration management device. Referring to FIG. 4, the method includes:

Step 301: During hot migration, the migration management device in the destination physical host acquires the first address of the memory copied from the source physical host memory, and the destination physical host and the source physical host respectively interconnect the standard PCIE device with different shortcut peripheral components. The PCIE device is a hardware device that supports a single input/output virtualization SR-IOV standard. The PCIE device includes at least one physical function PF. And at least one virtual function VF, wherein each PF and each VF is configured with a unique function number.

Step 302: Obtain a function number corresponding to the migrated virtual machine.

Step 303: Configure the correspondence between the first address of the memory and the function number to the PCIE device of the destination physical host.

In the embodiment of the present invention, when the virtual machine is hot-migrated, the trouble caused by the migration of the register is avoided, and the memory is directly migrated to the destination physical machine, and then the function number corresponding to the virtual machine after the migration and the virtual machine in the source physical host are used. The correspondence between the first address of the memory can be configured into the migrated PCIE device, which is convenient and simple to implement, greatly speeds up the hot migration of the virtual machine, and shortens the downtime.

Embodiment 4

An embodiment of the present invention provides a service context management method. Referring to FIG. 5, the method includes:

Step 401: The virtual machine allocates memory for at least one state offload service carried by the PCIE device. This memory is used to record the context of the state offload service.

When the VM is started, the VM requests the memory of the physical host for the PCIE device, and then allocates the requested memory to the state offload service. Specifically, after receiving the application of the virtual machine, the PCIE device driver in the physical host allocates memory for the virtual machine, wherein the PCIE device driver in the physical host refers to driving the PCIE device in the hard disk installed in the physical host. Drivers.

Step 402: The virtual machine generates a context table in the memory, where the context table is used to record a service context of at least one state offload service carried by the PCIE device.

In this embodiment, the context table may be a direct index table or a hash table, and the direct index table includes a correspondence between the keyword KEY and the service context, and the hash table includes a correspondence between the hash value and the service context.

Specifically, when the correspondence between the hash value and the service context is established in the hash table, the following manner can be implemented:

Converting the KEY to the total hash value A; determining the size M of the hash bucket corresponding to the virtual bucket corresponding to the virtual machine in the hash table or the VF corresponding to the unloading service to be processed; using the total hash value A to hash The size M of the bucket is modulo, and a hash value C is obtained; the hash value C is associated with the business context, and the correspondence between the hash value and the business context is obtained.

Specifically, different service packets or service data correspond to different protocols. Therefore, different service packets or service data may adopt different types of KEYs. For example, a service message based on the Remote Direct Memory Access (RDMA) protocol may be used. The queue pair (English: Queue Pair, QP for short) is used as the KEY in the RDMA protocol. It is based on the Transmission Control Protocol (English: Transmission Control Protocol, TCP: Internet Protocol, IP for short). For service packets, the IP quintuple (source IP address, destination IP address, source TCP port, destination TCP port, and protocol number) can be used as the KEY.

Since the direct index table is directly indexed by an array, and the KEY with a long number of bits such as the IP quintuple cannot be used as an index of the direct index table, a hash table is needed to implement the index.

In this embodiment, the state offload service may be a TCP offload service, a small computer system interface (English: Internet Small Computer System Interface, iSCSI) offload service, and an Ethernet Fibre Channel (English: Fibre Channel over Ethernet, FCoE for short) ) Unloading business, etc.

Step 403: The virtual machine sends the first address of the memory and the function number corresponding to the virtual machine to the PCIE device.

Specifically, the first address of the memory may be the physical address of the physical host (also referred to as the physical address of the host, English: Host Physical Address, referred to as HPA), or the physical address of the virtual machine (also referred to as the physical address of the client). English: Guest Physical Address (GPA), if it is GPA, when PCIE device accesses this address, it needs to use CPU VT-D (Intel technology) or IOMMU (AMD technology), or other automatic Implement GPA to HPA address translation technology to achieve GPA to HPA conversion.

In addition, the function number of the PF or VF corresponding to the virtual machine may be specified by the virtual machine or may be specified by the VMM. Therefore, step 403 can also be performed by the VMM.

Further, in this embodiment, the virtual machine may also save the correspondence between the first address of the memory and the function number for subsequent use.

Step 404: The PCIE device receives the first address of the memory sent by each virtual machine and the function number corresponding to each virtual machine, and saves the correspondence between the first place of the memory and the function number.

Step 405: The PCIE device receives the service information of the offloading service to be processed sent by the host side or the network side, and the at least one state offloading service includes the unloading service to be processed.

The service information of the offloading service in the to-be-processed state includes the service information sent by the host side or the service information sent by the network side. The service information sent by the host side is usually service data, and the service information sent by the network side is usually a service packet.

The host side refers to the system side composed of the CPU, memory, and hard disk in the physical host. The network side refers to the external network side to which the physical host is connected.

Step 406: The PCIE device determines, according to the service information of the offloading service in the to-be-processed state, the function number corresponding to the unloading service to be processed.

In an embodiment of the present invention, step 406 may include:

The function of the offloading service corresponding to the to-be-processed state is determined according to the feature in the service information of the offloading service sent by the host side or the function of receiving the service information of the offloading service of the to-be-processed state. Process ID The function number corresponding to the uninstall service.

In this embodiment, the feature in the service packet sent by the network side may be a field in the service packet, and different fields may be used as the feature here according to the type of the PCIE device. For example, when the PCIE device is a NIC adapter, the destination media access control (English: Media Access Control, MAC address) (or virtual LAN number + MAC) can be used as a feature, that is, when receiving a service packet, the NIC adapter The corresponding function number can be determined according to the destination MAC address in the service packet. For the host side to send service data, it can be determined according to the PCIE interface used when receiving the host side to transmit service data.

Step 407: The PCIE device saves the first address of the memory corresponding to the unloading service in the to-be-processed state according to the determined function number of the unloading service and the corresponding relationship between the function number and the first address of the memory, and the context table is saved in the memory. The context table is used to record the business context of the state offloading service carried by the PCIE device.

Step 408: The PCIE device acquires the KEY from the service information of the offloaded service in the to-be-processed state.

Specifically, the content of the KEY in the service information has been described in step 402, and details are not described herein again.

Step 409: The PCIE device acquires the service context of the unloaded service in the pending state according to the first address of the memory corresponding to the unloading service and the KEY.

In this embodiment, step 409 can be implemented in the following two ways:

The first way to achieve:

In the first step, the PCIE device searches for the corresponding direct index table or hash table in the memory of the virtual machine by using the first address of the memory corresponding to the unloading service in the pending state.

In the second step, the PCIE device directly reads the service context in the direct index table corresponding to the first address of the found memory, or calculates the hash value C according to the KEY, and uses the hash value C to read the first memory found. The business context in the hash table corresponding to the address.

In the embodiment of the present invention, the first implementation manner may be performed by a direct memory access (English: Direct Memory Access, DMA for short) read/write module in the PCIE device.

Wherein, the hash value C is calculated according to the KEY, including:

The hash function (for example, the CRC16 function) is used to convert the KEY to the total hash value A; the size of the hash bucket corresponding to the virtual bucket corresponding to the virtual machine in the hash table or the VF corresponding to the unloading service to be processed is determined; The total hash value A is used to modulo the size M of the hash bucket to obtain a hash value C.

The following takes the TCP offload service (the PCIE device as the NIC adapter) as an example.

Assume that there are VM1 and VM2 virtual machines on the physical host, VM1 supports 64K (64*1024) TCP connection, VM2 supports 128K (128*1024) TCP connection, and the network adapter supports the maximum number of TCP connections is 1M (1024*1024). ). VM1 and VM2 need to perform TCP offload service, and each connection for TCP offload service (a separate offload state task) requires a context of 256 bytes. When VM1 is initialized, apply for a hash table that supports 64K entries for the 64K TCP connection. Assume that the hash bucket size of the hash table is also 64K. Similarly, for the 128K TCP connection when VM2 is initialized, a hash table supporting 128K entries is allocated. It is assumed that the hash bucket size of the hash table is also 128K, and the maximum size of the NIC adapter is 1M.

When the TCP offload service packet arrives at the NIC adapter, the NIC adapter first obtains the function number of the VF or PF of the exit of the TCP offload service packet according to the VLAN+MAC query MAC address in the TCP offload service packet, and the function number corresponds to Is VM1 and gets a hash bucket size of 64K. The IP quintuple is obtained from the TCP header of the TCP offload service packet. The IP quintuple is used to read the contents of the hash table in the cache of the NIC adapter. If the entry is in the cache of the NIC adapter, the service context is directly obtained. Otherwise, the hash value of the IP quintuple is calculated, which is assumed to be 0x21523; the modulo operation is performed by 0x21523 and 64K, and the hash value is 0x1523, which is indexed by 0x1523, and the corresponding service context is queried in the hash table of VM1 to obtain the service. The context is then loaded into the cache of the NIC adapter for subsequent business processing.

The second way to achieve:

In the first step, the PCIE device sends a request message for acquiring a service context of the to-be-processed offload service to the virtual machine corresponding to the function number of the unloaded service to be processed, and the request message includes the unloading service corresponding to the to-be-processed state. The first address of the memory and the KEY.

In the second step, the virtual machine receives a request message sent by the PCIE device to obtain a service context of the to-be-processed offload service.

In the third step, the virtual machine determines a corresponding direct index table or a hash table according to the first address of the memory in the request message.

Further, the request message may not include the first address of the memory, and only needs to carry the function number, and the virtual machine obtains the corresponding direct index table according to the function number and the correspondence between the first address of the memory and the function number stored by the virtual machine or Hash table.

In the fourth step, the virtual machine reads the service context from the direct index table corresponding to the first address of the determined memory according to the KEY in the request message, or calculates the hash value C according to the KEY in the request message, and uses the hash value C to The service context is read in the hash table corresponding to the first address of the determined memory.

The manner in which the virtual machine calculates the hash value C according to the KEY in the request message is the same as the manner in which the PCIE device calculates the hash value C in the first implementation manner.

In the fifth step, the virtual machine sends the read service context to the PCIE device.

Specifically, the fifth step may be implemented in the following manner: the read service context is written into the cache of the PCIE device by using a cache Cache mechanism.

In the sixth step, the PCIE device receives the service context of the virtual machine to offload the service according to the pending state sent by the request message.

Step 410: The PCIE device processes the service information according to the context of the offloaded service according to the to-be-processed state.

Specifically, when the message processing is performed, the processing is performed by the corresponding VF.

Step 411: During the hot migration, the migration management device on the source physical host directly migrates the memory block and the context table to the destination virtual machine.

If you want to perform hot migration, in the iterative copy phase, each time the business context in the cache of the PCIE device is squeezed into the virtual machine memory, you need to synchronize the page read and write processing of the corresponding context memory in the virtual machine. , real-time synchronization of context data. During the outage copy, the cached operation of the context in the cache of the PCIE device is performed on the hot-swapped virtual machine, and the service context is flushed into the memory of the virtual machine. In the same manner, the memory is synchronized to the destination virtual machine. This facilitates the context migration of the state offloading service.

Step 412: The migration management device on the destination physical host configures the correspondence between the first address of the virtual machine in the source physical host and the function number corresponding to the virtual machine after the migration to the PCIE device connected to the destination physical host.

During hot migration, the migration management device in the destination physical host obtains the first address of the memory copied from the source physical host memory, and the destination physical host and the source physical host respectively have different shortcut peripherals. The component interconnects a standard PCIE device connection. The PCIE device is a hardware device that supports a single input/output virtualization SR-IOV standard. The PCIE device includes at least one physical function PF and at least one virtual function VF, wherein each PF and each The VF is configured with a unique function number; the function number corresponding to the migrated virtual machine is obtained; and the correspondence between the first address of the memory and the function number is configured to the PCIE device of the destination physical host.

In this embodiment, the migration management device may be a VMM.

Embodiment 5

The embodiment of the present invention provides a physical host, which is applicable to the method provided in Embodiment 1. Referring to FIG. 6, the physical host 51 runs a virtual machine 510, and the physical host 51 is connected to the fast peripheral component interconnection standard PCIE device 52. The PCIE device 52 is a hardware device supporting a single input/output virtualized SR-IOV standard. The PCIE device 52 includes at least one physical function PF 521 and at least one virtual function VF 522, and each PF 521 and each VF 522 The configuration has a unique function number, and the aforementioned virtual machine 510 includes:

The allocating module 511 is configured to allocate memory for at least one state offloading service carried by the PCIE device;

a generating module 512, configured to generate a context table in the memory, where the context table is used to record a service context of at least one state offload service carried by the PCIE device;

The sending module 513 is configured to send the first address and the function number of the memory to the PCIE device, where the PCIE device records the correspondence between the first address and the function number of the memory, and according to the correspondence between the first address of the memory and the function number, the memory is obtained from the memory. Get the business context of the state unloading business.

The present invention provides a service context management method, where a virtual machine is carried by a PCIE device. One state unloads the service to allocate memory, and then generates a context table in the memory, and then sends the first address of the memory and the function number corresponding to the virtual machine to the PCIE device, so that the PCIE device can record the correspondence between the first address of the memory and the function number. According to the correspondence between the first address of the memory and the function number, the business context of the state unloading service is obtained from the memory, and the operation is convenient and fast; in the hot migration of the virtual machine, the trouble caused by the migration of the register is avoided, You need to migrate the memory directly to the destination physical machine, and then configure the mapping between the function number of the virtual machine and the first address of the virtual machine in the source physical host to the migrated PCIE device. This is convenient and simple. It greatly speeds up the hot migration of virtual machines and shortens the downtime.

Embodiment 6

The embodiment of the present invention provides a physical host, which is applicable to the method provided in Embodiment 4. Referring to FIG. 7, the physical host 61 runs a virtual machine 610, and the physical host 61 is connected to the shortcut peripheral component interconnection standard PCIE device 62. The PCIE device 62 is a hardware device supporting a single input/output virtualized SR-IOV standard. The PCIE device 62 includes at least one physical function PF 621 and at least one virtual function VF 622, and each PF 621 and each VF 622 The configuration has a unique function number, and the foregoing virtual machine 610 includes:

The allocating module 611 is configured to allocate memory for at least one state offloading service carried by the PCIE device.

The generating module 612 is configured to generate a context table in the memory, where the context table is used to record a service context of the at least one state offload service carried by the PCIE device.

Specifically, the context table may be a direct index table or a hash table, and the direct index table includes a correspondence between the keyword KEY and the service context, and the hash table includes a correspondence between the hash value and the service context.

Specifically, the correspondence between the hash value and the service context in the hash table may be established by the virtual machine in the physical host, and may be implemented in the following manner: converting the KEY into the total hash value A; determining the virtual in the hash table The size of the hash bucket corresponding to the VF corresponding to the machine in the hash bucket or the unloading service to be processed; the total hash value A is used to modulate the size M of the hash bucket to obtain a hash value C; The hash value C is associated with the business context, and the correspondence between the hash value and the business context is obtained.

Specifically, different service packets or service data correspond to different protocols. Therefore, different service packets or service data may adopt different types of KEYs. For example, the RDMA protocol-based service packet can use the QP number in the RDMA protocol as the KEY; the TCP/IP-based service packet can use the IP quintuple (source IP address, destination IP address, source TCP port, destination TCP). Port and protocol number) as KEY.

In this embodiment, the state offload service may be a TCP offload service, an iSCSI offload service, an FCoE offload service, or the like.

The sending module 613 is configured to send the first address and the function number of the memory to the PCIE device, where the PCIE device records the correspondence between the first address and the function number of the memory, and according to the correspondence between the first address of the memory and the function number, the memory is obtained from the memory. Get the business context of the state unloading business.

Specifically, the first address of the memory can be either HPA or GPA. If it is GPA, the PCIE device needs to use the CPU VT-D (Intel technology) or IOMMU (AMD technology) when accessing the address. ), or other technology that automatically implements GPA to HPA address translation, enabling GPA to HPA conversion. In addition, the function number of the PF or VF corresponding to the virtual machine may be specified by the virtual machine or may be specified by the VMM.

Further, the foregoing at least one state offloading service includes a to-be-processed state offloading service, and the virtual machine may further include:

The receiving module 614 is configured to receive a request message sent by the PCIE device to obtain a service context of the to-be-processed state offload service, where the request message includes a first address of the memory and a keyword KEY;

a determining module 615, configured to determine, according to a first address of a memory in the request message, a corresponding direct index table or a hash table;

The reading module 616 is configured to read the service context from the direct index table corresponding to the first address of the determined memory according to the KEY in the request message, or calculate the hash value C according to the KEY in the request message, and adopt a hash value C. Reading a business context from a hash table corresponding to the determined first address of the memory;

The foregoing sending module 613 is further configured to send the read service context to the PCIE device.

In this embodiment, the foregoing reading module 616 is specifically configured to:

The hash function is used to convert the KEY in the request message to the total hash value A; the size of the hash bucket corresponding to the virtual bucket corresponding to the virtual machine in the hash table or the VF corresponding to the unloading service to be processed in the hash table is determined; The total hash value A is modulo the size M of the hash bucket to obtain a hash value C.

The following takes the TCP offload service (the PCIE device as the network adapter) as an example to describe the working process of the virtual machine 610:

When the virtual machine receives the request message sent by the PCIE device for acquiring the service context of the to-be-processed offloading service, the virtual machine first obtains the hash table according to the first address of the memory. Then, according to the KEY, a hash value C is obtained. Specifically, the KEY is an IP quintuple, which is assumed to be 0x21523; the modulo operation is performed by 0x21523 and 64K, and the hash value is 0x1523, and the 0x1523 is indexed, and the corresponding business context is queried in the hash table to obtain the business context. Send it to the NIC adapter for later business processing.

In this embodiment, the foregoing sending module 613 is specifically configured to: write the read service context into the cache of the PCIE device by using a cache Cache mechanism.

Example 7

The embodiment of the present invention provides a PCIE device, which is applicable to the method provided in the second embodiment. Referring to FIG. 8, the PCIE device 71 is connected to a physical host 72. The physical host 72 runs at least one virtual machine 720 and a PCIE device. For a hardware device that conforms to the single-input and output virtualization SR-IOV standard, the PCIE device 71 includes at least one physical function PF 711 and at least one virtual function VF 712, each PF 711 and each VF 712 being configured with a unique function. No. The PCIE device 71 further includes:

The receiving module 713 is configured to receive service information of the offloading service to be processed sent by the host side or the network side;

The first determining module 714 is configured to determine, according to the service information of the offloading service in the to-be-processed state, a function number corresponding to the to-be-processed unloading service;

The second determining module 715 is configured to save the first address of the memory corresponding to the unloading service to be processed according to the determined function number of the unloading service and the corresponding relationship between the function number and the first address of the memory, and save the memory in the memory. There is a context table, where the context table is used to record a service context of at least one state offload service carried by the PCIE device;

The first obtaining module 716 is configured to obtain a KEY from the service information of the offloaded service in the to-be-processed state;

The second obtaining module 717 is configured to acquire a service context of the to-be-processed unloading service according to the first address of the memory corresponding to the unloading service and the KEY according to the to-be-processed state.

Example eight

The embodiment of the present invention provides a PCIE device, which is applicable to the method provided in Embodiment 4. Referring to FIG. 9, the PCIE device 81 is connected to a physical host 82, and the physical host 82 runs to One less virtual machine 820, the PCIE device is a hardware device conforming to a single input and output virtualized SR-IOV standard, and the PCIE device 81 includes at least one physical function PF 811 and at least one virtual function VF 812, each PF 811 and each The VF 812 is configured with a unique function number, and the PCIE device 81 further includes:

The receiving module 813 is configured to receive service information of the offloading service to be processed sent by the host side or the network side.

The service information includes service information sent by the host side or service information sent by the network side. The service information sent by the host side is usually service data, and the service information sent by the network side is usually a service packet. The host side refers to the system side composed of CPU, memory, and hard disk in the physical host. The network side refers to the external network side to which the physical host is connected.

The first determining module 814 is configured to determine, according to the service information of the offloading service in the to-be-processed state, the function number corresponding to the to-be-processed unloading service.

The second determining module 815 is configured to save the first address of the memory corresponding to the unloading service to be processed according to the determined function number of the unloading service and the corresponding relationship between the function number and the first address of the memory, and save the memory in the memory. There is a context table, which is used to record the business context of at least one state offload service carried by the PCIE device.

The first obtaining module 816 is configured to obtain a KEY from the service information of the offloaded service in the to-be-processed state.

The second obtaining module 817 is configured to acquire a service context of the to-be-processed unloading service according to the first address of the memory corresponding to the unloading service and the KEY according to the to-be-processed state.

In an implementation manner of this embodiment, the foregoing second obtaining module 817 is specifically configured to:

Find the corresponding direct index table or hash table in the memory of the virtual machine by using the first address of the memory corresponding to the unloading service in the pending state; directly use the KEY to directly read the service context in the direct index table corresponding to the first address of the found memory. , or calculate the hash value C according to KEY, using a hash value C reads the business context in the hash table corresponding to the first address of the found memory.

Specifically, the foregoing second obtaining module 817 can be used to:

The following takes the TCP offload service (the PCIE device as the NIC adapter) as an example to describe the working process of the PCIE device:

In another implementation manner of this embodiment, the foregoing second obtaining module 817 is specifically configured to:

Sending, by the virtual machine corresponding to the function number corresponding to the unloaded service of the to-be-processed state, a request message for acquiring a service context of the unloading service to be processed, the request message includes a first address and a KEY of the memory corresponding to the unloading service of the to-be-processed state The receiving virtual machine unloads the business context of the service according to the pending state sent by the request message.

In this embodiment, the foregoing first determining module 814 is specifically configured to: uninstall the feature in the service information of the service according to the to-be-processed state sent by the host side, or receive the host-side transmission to be processed. The PCIE interface used to carry the service information of the service determines the function number corresponding to the unloading service in the pending state, and the feature is used to indicate the function number corresponding to the unloading service in the pending state.

In this embodiment, the feature in the service packet sent by the network side may be a field in the service packet, and different fields may be used as the feature here according to the type of the PCIE device. For example, when the PCIE device is a NIC adapter, the destination MAC address (or virtual LAN number + MAC) can be used as a feature. When receiving a service packet, the NIC adapter can determine the corresponding MAC address according to the destination MAC address in the service packet. Function number. For the host side to send service data, it can be determined according to the PCIE interface used when receiving the host side to transmit service data.

Further, the foregoing receiving module 813 is further configured to receive a first address of a memory of each virtual machine and a function number corresponding to each virtual machine;

The PCIE device may further include: a storage module 818, configured to save a correspondence between a first address of the memory and a function number.

Example nine

The embodiment of the present invention provides a migration management device, which is disposed in a destination physical host, and is applicable to the method provided in Embodiment 3. Referring to FIG. 10, the migration management device includes:

The first obtaining module 901 is configured to acquire, when hot migration, a first address of the memory copied from the source physical host memory, and the destination physical host and the source physical host respectively connect with different fast peripheral components to interconnect the standard PCIE device, PCIE The device is a hardware device supporting a single input and output virtualization SR-IOV standard. The PCIE device includes at least one physical function PF and at least one virtual function VF, wherein each PF and each VF are configured with a unique function number;

The second obtaining module 902 is configured to obtain a function number corresponding to the migrated virtual machine.

The configuration module 903 is configured to configure the correspondence between the first address of the memory and the function number to the PCIE device of the destination physical host.

It should be noted that, when the virtual machine provided by the foregoing embodiment performs virtual machine memory management, only the division of each functional module is used as an example. In actual applications, the function distribution may be completed by different functional modules as needed. Or one of the function assignments is completed by more modules, or multiple of the functions are assigned by the same module, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the physical host and the service context management method embodiment provided by the foregoing embodiments are in the same concept, and the specific implementation process is described in the method embodiment, and details are not described herein again.

The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

A person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium. The storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

A service context management method, which is applicable to a virtual machine, where the virtual machine runs on a physical host, and the physical host is connected to a fast peripheral component to connect with a standard PCIE device, and the PCIE device is a single root. The input and output virtualized SR-IOV standard hardware device, the PCIE device including at least one physical function PF and at least one virtual function VF, wherein each PF and each VF is configured with a unique function number, the method comprising :

The virtual machine allocates memory for at least one state offload service carried by the PCIE device;

The virtual machine generates a context table in the memory, where the context table is used to record a service context of at least one state offload service carried by the PCIE device;

The virtual machine sends the first address of the memory and the function number corresponding to the virtual machine to the PCIE device.
The method according to claim 1, wherein the context table is a direct index table or a hash table, and the direct index table includes a correspondence between a keyword KEY and a service context, and the hash table includes a hash. And the at least one state offload service includes a to-be-processed state offload service, where the method further includes:

Receiving, by the PCIE device, a request message for acquiring a service context of the to-be-processed state offload service, where the request message includes a first address of the memory and a keyword KEY;

Determining a corresponding direct index table or a hash table according to the first address of the memory in the request message;

Reading a service context from the determined direct index table corresponding to the first address of the memory according to the KEY in the request message, or calculating a hash value C according to the KEY in the request message, and adopting the hash value C reads the business context from the determined hash table corresponding to the first address of the memory;

The read service context is sent to the PCIE device.
The method according to claim 2, wherein the calculating the hash value C according to the KEY in the request message comprises:

Using a hash function to convert the KEY in the request message into a total hash value A;

Obtaining a size H of a hash bucket corresponding to the virtual machine in the hash table corresponding to the first address of the memory, or a hash bucket corresponding to the VF corresponding to the unloading service to be processed;

Using the total hash value A, the size M of the hash bucket is modulo, and the hash value C is obtained.
A method according to claim 2 or 3, wherein said said industry to be read The context is sent to the PCIE device, including:

The read service context is written into the cache of the PCIE device by means of a cache Cache mechanism.
A service context management method, which is applicable to a PCIE device, wherein the PCIE device is connected to a physical host, and the PCIE device is a hardware device supporting a single input/output virtualized SR-IOV standard, and the PCIE device The method includes at least one physical function PF and at least one virtual function VF, wherein each PF and each VF is configured with a unique function number, and the physical host runs at least one virtual machine, and the method includes:

Receiving, by the PCIE device, service information of a to-be-processed offload service sent by the host side or the network side;

Determining, by the PCIE device, a function number corresponding to the to-be-processed unloading service according to the service information of the offloading service in the to-be-processed state;

Determining, by the PCIE device, a first address of a memory corresponding to the unloading service to be processed according to the determined function number of the unloading service and the corresponding relationship between the function number and the first address of the memory. A context table is saved, where the context table is used to record a service context of a state offload service carried by the PCIE device;

The PCIE device acquires a KEY from the service information of the offloaded service in the to-be-processed state;

The PCIE device acquires a service context of the to-be-processed offload service according to the first address of the memory corresponding to the unloading service and the KEY according to the to-be-processed state.
The method according to claim 5, wherein the context table is a direct index table or a hash table, and the direct index table includes a correspondence between a keyword KEY and a service context, and the hash table includes a hash. Corresponding relationship between the value and the service context, the first address of the memory corresponding to the unloading service according to the to-be-processed state, and the service context of the KEY to obtain the unloading service of the to-be-processed state, including:

The first address of the memory corresponding to the unloading service in the to-be-processed state is used to search for a corresponding direct index table or a hash table in the memory of the virtual machine;

Using the KEY to directly read the service context in the direct index table corresponding to the first address of the found memory, or calculate the hash value C according to the KEY, and use the hash value C to read the found context. The business context in the hash table corresponding to the first address of the memory.
The method according to claim 6, wherein the calculating the hash value C according to the KEY comprises:

Using a hash function to convert the KEY in the request message into a total hash value A;

Obtaining a size H of a hash bucket corresponding to the virtual machine in the hash table corresponding to the first address of the memory, or a hash bucket corresponding to the VF corresponding to the unloading service to be processed;

Using the total hash value A, the size M of the hash bucket is modulo, and the hash value C is obtained.
The method according to any one of claims 5-7, wherein the first address of the memory corresponding to the unloading service according to the to-be-processed state and the KEY acquire the service context of the unloading service of the to-be-processed state, include:

Sending, by the virtual machine corresponding to the determined function number corresponding to the offloading service, the request message for acquiring the service context of the to-be-processed state unloading service, where the request message includes the to-be-processed state Unloading the first address of the memory corresponding to the service and the KEY;

Receiving, by the virtual machine, the service context of the offloaded service according to the to-be-processed state sent by the request message.
The method according to any one of claims 5-7, wherein the determining, according to the service information of the offloading service in the to-be-processed state, the function number corresponding to the to-be-processed unloading service, includes:

Determining the unloading service to be processed according to the feature in the service information of the to-be-processed state offloading service sent by the host side or the PCIE interface used by the host side to transmit the service information of the to-be-processed state offloading service Corresponding function number, the feature is used to indicate a function number corresponding to the to-be-processed state unloading service.
The method of any of claims 5-7, wherein the method further comprises:

The PCIE device receives a first address of a memory of each virtual machine and a function number corresponding to each virtual machine;

The correspondence between the first address of the memory and the function number is saved.
A method for managing a business context, the method comprising:

During hot migration, the migration management device in the destination physical host acquires the first address of the memory copied from the source physical host memory, and the destination physical host and the source physical host respectively interconnect the standard PCIE with different shortcut peripheral components. Device connection, the PCIE device is a hardware device supporting a single input and output virtualization SR-IOV standard, the PCIE device includes at least one physical function PF and at least one virtual function VF, wherein each PF and each VF All are configured with a unique function number;

Obtaining the function number corresponding to the migrated virtual machine;

And mapping a correspondence between the first address of the memory and the function number to a PCIE device of the destination physical host.
A physical host, wherein the physical host runs a virtual machine, and the physical host is connected to a shortcut peripheral component interconnecting a standard PCIE device, and the PCIE device is a single input/output virtualized SR-IOV. A standard hardware device, the PCIE device includes at least one physical function PF and at least one virtual function VF, wherein each PF and each VF are configured with a unique function number, and the virtual machine includes:

An allocating module, configured to allocate memory for at least one state offloading service carried by the PCIE device;

a generating module, configured to generate a context table in the memory, where the context table is used to record a service context of at least one state offload service carried by the PCIE device;

And a sending module, configured to send the first address and the function number of the memory to the PCIE device.
The physical host according to claim 12, wherein the context table is a direct index table or a hash table, and the direct index table includes a correspondence between a keyword KEY and a service context, and the hash table includes a hash table. And the at least one state offloading service includes a to-be-processed state offloading service, where the virtual machine further includes:

a receiving module, configured to receive a request message sent by the PCIE device to obtain a service context of the to-be-processed state offload service, where the request message includes a first address of the memory and a keyword KEY;

a determining module, configured to determine, according to the first address of the memory in the request message, a corresponding direct index table or a hash table;

a reading module, configured to read a service context from the determined direct index table corresponding to the first address of the memory according to the KEY in the request message, or calculate a hash value C according to the KEY in the request message, Using the hash value C to read the service context from the determined hash table corresponding to the first address of the memory;

The sending module is further configured to send the read service context to the PCIE device.
The physical host according to claim 13, wherein the reading module is specifically configured to:

Using a hash function, the KEY in the request message is converted into a total hash value A; and the hash bucket corresponding to the virtual machine in the hash table corresponding to the determined first address of the memory is obtained or Processing the size M of the hash bucket corresponding to the VF corresponding to the state unloading service; using the total hash value A to modulo the size M of the hash bucket to obtain the hash value C.
The physical host according to claim 13 or 14, wherein the sending module is configured to: write the read service context into a cache of the PCIE device by using a cache Cache mechanism.
A PCIE device, wherein the PCIE device is connected to a physical host, the PCIE device is a hardware device supporting a single input and output virtualized SR-IOV standard, and the PCIE device includes at least one physical function PF and At least one virtual function VF, wherein each PF and each VF is configured with a unique function number, and the physical host runs at least one virtual machine, and the PCIE device includes:

a receiving module, configured to receive service information of a to-be-processed unloading service sent by the host side or the network side;

a first determining module, configured to determine, according to the service information of the offloading service in the to-be-processed state, a function number corresponding to the to-be-processed state unloading service;

a second determining module, configured to determine, according to the determined function number of the unloading service and the corresponding relationship between the function number and the first address of the memory, the first address of the memory corresponding to the unloading service of the to-be-processed state, A context table is stored in the memory, where the context table is used to record a service context of a state offload service carried by the PCIE device;

a first obtaining module, configured to obtain a KEY from the service information of the to-be-processed state offloading service;

The second obtaining module is configured to acquire, according to the to-be-processed state, the first address of the memory corresponding to the unloading service and the KEY to obtain the service context of the to-be-processed state offloading service.
The PCIE device according to claim 16, wherein the context table is a direct index table or a hash table, and the direct index table includes a correspondence between a keyword KEY and a service context, and the hash table includes a hash table. The correspondence between the hash value and the service context, where the second acquiring module is specifically configured to:

The first address of the memory corresponding to the unloading service in the to-be-processed state is used to search for a corresponding direct index table or a hash table in the memory of the virtual machine; and the first address corresponding to the memory that is found by using the KEY is directly read. Directly indexing the business context in the table, or calculating the hash value C according to the KEY, and using the hash value C to read the searched service context in the hash table corresponding to the first address of the memory.
The PCIE device according to claim 17, wherein the second obtaining module is specifically configured to:

Using a hash function, the KEY in the request message is converted into a total hash value A; and the hash bucket corresponding to the virtual machine in the hash table corresponding to the determined first address of the memory is obtained or the to-be-processed The size M of the hash bucket corresponding to the VF corresponding to the state unloading service; the total hash value A is used to modulo the size M of the hash bucket to obtain the hash value C.
The PCIE device according to any one of claims 16 to 18, wherein the second obtaining module is specifically configured to:

Sending, by the virtual machine corresponding to the determined function number corresponding to the offloading service, the request message for acquiring the service context of the to-be-processed state unloading service, where the request message includes the to-be-processed state Unloading the first address of the memory corresponding to the service and the KEY; receiving the service context of the virtual machine offloading the service according to the to-be-processed state sent by the request message.
The PCIE device according to any one of claims 16 to 18, wherein the first determining module is configured to: uninstall features in the service information of the service according to the to-be-processed state sent by the host side, or Receiving, by the PCIE interface, the function of the offloading service of the to-be-processed state, the function of the unloading service in the to-be-processed state number.
The PCIE device according to any one of claims 16 to 18, wherein the receiving module is further configured to receive a first address of a memory of each virtual machine and a function number corresponding to each virtual machine;

The PCIE device further includes: a storage module, configured to save a correspondence between a first address of the memory and the function number.
A migration management device is provided in the destination physical host, where the migration management device includes:

a first obtaining module, configured to acquire a first address of the memory copied from the source physical host memory during the hot migration, where the destination physical host and the source physical host respectively interconnect the standard PCIE device with different shortcut peripheral components Connected, the PCIE device is a hardware device supporting a single input/output virtualized SR-IOV standard, the PCIE device including at least one physical function PF and at least one virtual function VF, wherein each PF and each VF Configured with a unique feature number;

a second acquiring module, configured to obtain the function number corresponding to the migrated virtual machine;

And a configuration module, configured to configure a correspondence between the first address of the memory and the function number to a PCIE device of the destination physical host.