JP6036504B2 - Information processing apparatus, control program, and control method - Google Patents

Description

  The present invention relates to an information processing apparatus, a control program, and a control method for transferring data between a host OS (Operating System) and a guest OS in a fully virtualized environment.

  Conventionally, as a method for realizing message communication between OSs, a method using a shared buffer and a method using an API (Application Program Interface) for message communication are known (Patent Documents 1 and 2). ).

JP 2001-282558 A JP 2006-164111 A

  However, since the message communication between the host OS and the guest OS is realized by a shared buffer in the conventional technology, the conventional technology cannot be applied in a fully virtualized environment where the host OS and the guest OS cannot have a shared buffer. In addition, since it is necessary to provide an API in the software library in another conventional technique, the conventional technique cannot be applied in a fully virtualized environment on the premise that no changes are made to the guest OS and applications. Furthermore, in a fully virtualized environment, access from the host OS to the guest OS is not permitted in order to ensure security. An object of the present invention is to provide an information processing apparatus, a control program, and a control method for transferring data between a host OS and a guest OS in a fully virtualized environment.

  An information processing apparatus according to the present invention, in an information processing apparatus that operates a plurality of virtual machines, performs exception processing and collects data from the plurality of virtual machines, and between the collection unit and the virtual machines Specific information indicating the data transfer, status information indicating the status of the data transfer and a storage unit for storing the data amount of the data to be transferred, a data storage unit for storing the data to be transferred, and a return value storage for storing the return value A write unit that writes data to be transferred to the data storage unit, an execution unit that executes an instruction that generates an exception, and causes the collection unit to execute an exception process, and a transfer data A calculation unit that calculates a data amount of untransferred data from a data amount; a reading unit that reads a return value from the return value storage unit; and a data amount of untransferred data calculated by the calculation unit The status information indicating the status of data transfer and the data amount of the data to be transferred are determined from the return value read by the reading unit, and the specific information, the determined status information and the data amount of the data to be transferred are stored in the storage unit A second writing unit for writing information, and the collection unit determines whether or not the specific information is stored in the storage unit, and a second reading unit that reads status information from the storage unit When the read status information is being transferred, a third reading unit for reading data from the data storage unit, and a data amount of data read by the third reading unit from the data storage unit are stored in the storage unit. And a third writing unit that writes a predetermined return value in the return value storage unit when the data amount matches the data amount.

  According to one aspect of the present application, data transfer can be performed between a host OS and a guest OS in a fully virtualized environment.

2 is a block diagram illustrating an example of a hardware configuration of a computer system according to Embodiment 1. FIG. It is a block diagram which shows the function which a server apparatus has. It is explanatory drawing which shows the example of a format of general purpose register R0. It is a list which shows an example of a transfer condition. It is a list which shows an example of a return value. It is a flowchart which shows the process sequence of the data transfer performed by VMM and VM. It is a flowchart which shows the process sequence of the data transfer performed by VMM and VM. It is a flowchart which shows the process sequence of the data transfer performed by VMM and VM. It is a block diagram which shows the function which the server apparatus which concerns on Embodiment 2 has. 10 is a flowchart illustrating a processing procedure of data transfer performed by the VMM and VM according to the second embodiment. 10 is an explanatory diagram illustrating a format example of a general purpose register R0 according to Embodiment 3. FIG. 10 is a table showing an example of a transfer status according to the fourth embodiment. It is a block diagram which shows the function which the server apparatus which concerns on Embodiment 4 has. 14 is a flowchart illustrating a processing procedure of data transfer performed by the VMM and the VM according to the fourth embodiment. 14 is a flowchart illustrating a processing procedure of data transfer performed by the VMM and the VM according to the fourth embodiment. 14 is a flowchart illustrating a processing procedure of data transfer performed by the VMM and the VM according to the fourth embodiment.

Embodiment 1
FIG. 1 is a block diagram illustrating an example of a hardware configuration of a computer system according to the first embodiment. The computer system includes a server device (information processing device) 1 and a terminal device 2. The server device 1 and the terminal device 2 communicate via the network N. The terminal device 2 is a terminal device used by a user of the computer system. The user uses various information processing services provided by the server device using the terminal device 2.

  The server device 1 includes a central processing unit (CPU) 30, a read only memory (ROM) 31, a read only memory (RAM) 32, a mass storage device 33, a communication unit 34, and a reading unit 35. The CPU 30 controls each part of the hardware according to the control program 31 a stored in the ROM 31 or the large capacity storage device 33. The RAM 32 is, for example, SRAM (Static RAM), DRAM (Dynamic RAM), flash memory, or the like. The RAM 32 temporarily stores various data generated when the CPU 30 executes the program. The mass storage device 33 is, for example, a hard disk or an SSD (Solid State Drive). The mass storage device 33 stores a VMM (Virtual Machine Monitor) program, a guest OS, applications, and various data. Each program is a control program 31a read and executed by the CPU 30, and is read by the CPU 30 into the RAM 32 and executed. Each program may be stored in the ROM 31. The communication unit 34 communicates with the terminal device 2 via the network N. The reading unit 35 reads a storage medium 41 such as a CD (Compact Disk) -ROM and a DVD (Digital Versatile Disc) -ROM. The control program 31 a may be read by the reading unit 35 from the storage medium 41 and stored in the mass storage device 33. Further, the control program 31a may be downloaded from another computer via the network N. Furthermore, the control program 31a may be read from the semiconductor memory 51.

  The terminal device 2 includes a CPU 20, a ROM 21, a RAM 22, a communication unit 23, and a reading unit 24. The CPU 20 controls each part of the hardware according to the control program 21 a stored in the ROM 21. The RAM 22 is, for example, SRAM, DRAM, flash memory or the like. The RAM 22 temporarily stores various data generated when the CPU 20 executes the program. The communication unit 23 communicates with the server device 1 via the network N. The reading unit 24 reads a storage medium 42 such as a CD-ROM or a DVD-ROM. The control program 21a may be read by the reading unit 24 from the storage medium 42, stored in the RAM 22, and executed. Further, the control program 21a may be downloaded from another computer via the network N. Furthermore, the control program 21a may be read from the semiconductor memory 52.

  The VMM program is a software program for providing a virtual environment that enables the server device 1 to operate a VM (Virtual Machine). When the CPU 30 executes the VMM program, the operation as the VMM starts. When the CPU 30 operates the VMM program as a VMM, the server apparatus 1 is provided with a virtual environment in which a plurality of VMs can operate independently.

  The guest OS program is a software program that executes the OS on the VM. The guest OS program starts an operation as an OS (hereinafter referred to as “guest OS”) by the CPU 30 executing the guest OS program after the VM is activated.

  The application program is a software program executed by each guest OS.

  In the server device 1 according to the present embodiment, the VMM provides a fully virtualized environment. A fully virtualized environment is a virtualized environment that completely emulates hardware. Since the hardware is completely emulated, there is an advantage that the guest OS operating in the VM does not need to be modified for the virtual environment. However, since some instructions cannot be directly executed on the physical CPU, it is necessary to intervene VMM. Some of these instructions are called sensitive instructions. A sensitive instruction is an instruction that affects the operation of a real computer when a program on the VM is executed, or an instruction that causes inconvenience when executed on a VM because the result differs from that executed on the real computer. Therefore, in a fully virtualized environment, the CPU detects the execution of a sensitive instruction by the VM and passes the processing to the VMM. The VMM to which the process is passed causes the CPU to execute a sensitive instruction and returns the process to the VM. In the present embodiment, data is transferred from the VM (guest OS) to the VMM (host OS) using an exception generated by detection of a sensitive instruction and the exception handling mechanism in the VMM corresponding to the occurrence of the exception.

  FIG. 2 is a block diagram illustrating functions of the server device 1. When the CPU 30 executes each program, the VMM 10 (collection unit) operates in the server device 1, and the VM 11 (virtual computer) operates on the VMM 10. The VMM 10 allocates resources (CPU 30, ROM 31, RAM 32, etc.) of the server device 1 to the activated VM 11. After the resource is allocated, the operation of the guest OS starts on the VM 11. Although only two VMs 11 are illustrated in FIG. 2, three or more VMs may be activated, or only one may be activated.

  In the VM 11, the transfer program 110 operates on the guest OS 120 to realize data transfer with the VMM 10. The VM 11 includes a setting storage unit 130 (storage unit), a data storage unit 140, and a return value storage unit 150. These storage units are realized by resources (CPU 30 registers) allocated from the VMM 10. The transfer program 110 includes functional units of a storage unit 111 (writing unit), a setting unit 112 (determination unit, second writing unit), an execution unit 113, a calculation unit 114, a determination unit 115 (reading unit), and a generation unit 116. have.

  The storage unit 111 writes data to be transferred to the data storage unit 140. The setting unit 112 writes setting information (specific value indicating data transfer, transfer status, transfer data amount) in the setting storage unit 130 when performing data transfer. The execution unit 113 executes a sensitive instruction to pass processing to the VMM 10. The calculation unit 114 calculates the amount of transferred data and the amount of untransferred data when executing data transfer. The determination unit 115 reads the return value from the VMM 10 stored in the return value storage unit 150 and determines whether or not the data transfer has been performed normally. The generation unit 116 generates a transfer status (during transfer, completion, etc.) from the amount of untransferred data calculated by the calculation unit 114 and the determination result of the determination unit 115.

  In addition to the function of managing the VM 11, the VMM 10 has various functional units for realizing data transfer with the VM 11, a specific value determination unit 10 a (determination unit), a situation determination unit 10 b (second reading unit), and an acquisition unit 10 c ( A third reading unit), a result setting unit 10d (third writing unit), and an end unit 10e. The specific value determination unit 10a reads the specific value from the setting storage unit 130, and determines whether or not processing has been passed from the VM 11 for data transfer. The status determination unit 10b reads the transfer status stored in the setting storage unit 130 and determines the status of data transfer. The acquisition unit 10c acquires the transfer data stored in the data storage unit 140. The result setting unit 10 d writes a return value indicating the result of the data transfer process in the VMM 10 in the return value storage unit 150. The end unit 10e executes an instruction to end the exception process, and returns the process to the VM 11.

  Next, data transfer processing between the VMM 10 and the VM 11 performed using the transfer program 110 will be described. In the example described below, a case where data is transmitted from the VM 11 to the VMM 10 will be described.

  The setting storage unit 130, the data storage unit 140, and the return value storage unit 150 are realized by using general-purpose registers of the CPU 30. When processing shifts from the VM 11 to the VMM 10 due to the occurrence of an exception, the state of the general-purpose register of the CPU 30 is maintained. Alternatively, the state of the general-purpose register is saved in the save area. The saved value can be accessed from the VMM 10. In the following description, it is assumed that there are 16 general purpose registers from R0 to R15, R0 is the setting storage unit 130 (storage unit), 14 from R1 to R14 are the data storage unit 140, and R15 is the return value storage unit 150. It shall be used as

  FIG. 3 is an explanatory diagram showing a format example of the general-purpose register R0. FIG. 4 is a list showing an example of the transfer status. FIG. 5 is a list showing examples of return values. As shown in FIG. 3, R0, which is the setting storage unit 130, is divided into three regions R00, R01, and R02. The specific value area R00 stores a specific value (magic number, specific information) that is a value indicating data transfer. A value that is not set by an instruction executed by the CPU 30 is set in advance. The transfer status area R01 stores data transfer status (index, status information). The used register number area R02 stores the number of registers used for transfer (data amount of data to be transferred). Since the general-purpose registers R1 to R14 are used, any value from 0 to 14 is stored as the number of registers. As shown in FIG. 4, the data transfer status is represented as 1 during transfer and 0 as completion. As shown in FIG. 5, the return value indicating normality is 1, and the return value 0 indicating abnormality is 0.

  FIG. 6 to FIG. 8 are flowcharts showing a processing procedure of data transfer performed by the VMM 10 and the VM 11. The VM 11 prepares data to be transferred (step S1). The preparation process may be performed by the transfer program 110 or may be performed by another application program that calls the transfer program 110. The VM 11 (storage unit 111) sets data to be transferred to the general-purpose registers R1 to Rx (x = 2 to 14) (step S2). The VM 11 (setting unit 112) has a specific value (also referred to as a magic number) indicating data transfer in the specific value area R00 of the general-purpose register R0, a value 1 indicating transfer in the transfer status area R01 of the general-purpose register R0, and a used register number area R02. The number (x) of general-purpose registers used for data storage used in is set (step S3). The VM 11 (execution unit 113) issues a sensitive instruction and generates an exception (step S4). Note that the sensitive instruction to be executed is determined in advance. Here, it is assumed that the instruction is a halt instruction. Processing moves from VM 11 to VMM 10.

  The VMM 10 (specific value determination unit 10a) checks whether the exception factor is due to a predetermined factor (halt instruction execution) (step S5). When the exception factor is predetermined (YES in step S5), the VMM 10 (specific value determination unit 10a) reads the value set in the specific value region R00 of the general-purpose register R0, and the value is the specific value. Whether or not (step S6). When a specific value is set (YES in step S6), the VMM 10 (situation determination unit 10b) reads the value set in the transfer status area R01 of the general-purpose register R0, and that value is a value indicating that transfer is in progress. Whether or not (step S7). When the value indicates that the data is being transferred (YES in step S7), the VMM 10 (acquiring unit 10c) reads the value (number of used registers) set in the used register area R02 of the general purpose register R0, and the general purpose register R1 according to the value. To R14 is acquired (step S8). For example, if the number of registers used is 14, the VMM 10 (acquisition unit 10c) acquires values from 14 registers from the general-purpose registers R1 to R14. If the number of registers used is 5, the VMM 10 (acquisition unit 10c) acquires values from five registers from the general-purpose registers R1 to R5. The VMM 10 (result setting unit 10d) sets a return value indicating normality in the general-purpose register R15 serving as the return value storage unit 150 (step S9). The VMM 10 (end unit 10e) executes an exception process end instruction (step S10). The process returns from the VMM 10 to the VM 11.

  If the exception factor is not a predetermined factor (NO in step S5), the VMM 10 executes an exception process determined for each factor (step S11). If the exception factor is predetermined but the value stored in the specific value area R00 is not a specific value (NO in step S6), the exception is not an exception caused by the data transfer process. Is performed (step S11). If the value set in the transfer status area R01 is not a value indicating that transfer is in progress (NO in step S7), the VMM 10 (status determination unit 10b) determines whether or not the value indicates completion of transmission (step S12). ). If the value indicates the completion of transmission (YES in step S12), the VMM 10 (situation determination unit 10b) moves the process to step S9. If the value is not a value indicating completion of transmission (NO in step S12), the VMM 10 (result setting unit 10d) sets a return value indicating an error in the general-purpose register R15 (step S13). The VMM 10 (result setting unit 10d) moves the process to step S10. The process returns from the VMM 10 to the VM 11.

  The VM 11 (determination unit 115) reads the value set in the general-purpose register R15 as the return value storage unit 150 and determines whether or not the value (return value) is a value indicating normality (step S14). If the return value is normal (YES in step S14), the VM 11 (calculation unit 114) determines whether there is untransferred data (step S16). This determination is performed as follows, for example. Calculate the total amount of data to be transferred. Each time data transfer is performed, the data amount of the transferred data is added, and it is determined whether the added data amount of the transferred data is equal to or exceeds the total data amount. If the value is equal to or exceeded, there is no untransferred data. Alternatively, since data transfer is performed using a general-purpose register, management may be performed in units of general-purpose registers. It is calculated how many general-purpose registers the data to be transferred at the start of the transfer. Each time data transfer is performed, the number of registers in which transfer data is set is subtracted, and if the value becomes 0, there is no untransferred data. When there is untransferred data (YES in step S16), the VM 11 (calculation unit 114) returns the process to step S2. The processing after step S2 is as described above.

  When the return value from the VMM 10 is not normal (NO in step S14), the VM 11 (determination unit 115) determines whether or not the transfer is complete (step S15). Whether or not the transfer has been completed is determined by whether or not the transfer completion has already been transmitted to the VMM 10. For example, a flag area is provided, and if the flag is set, it is determined that the transfer is complete, and if the flag is cleared, it is determined that the transfer is not complete. If the transfer has not been completed (NO in step S15), the VM 11 (determination unit 115) returns the process to step S2 to retransmit the data. If the transfer has been completed (YES in step S15), the VM 11 (determination unit 115) moves the process to step S18. The VM 11 (setting unit 112) sets a specific value indicating data transfer in the specific value area R00 of the general-purpose register R0 and a value 0 indicating transfer completion in the transfer status area R01 of the general-purpose register R0 (step S18). The VM 11 (setting unit 112) moves the process to step S4. The processing after step S4 is as described above.

  If there is no untransferred data (NO in step S16), the VM 11 (determination unit 115) determines whether transfer completion has been transmitted to the VMM 10 (step S17). This determination is performed using a flag as described above, for example. When the transfer completion has been transmitted to the VMM 10 (YES in step S17), the VM 11 (determination unit 115) ends the data transfer process. If the transfer completion has not been transmitted (NO in step S17), the VM 11 (determination unit 115) moves the process to step S18. The processing after step S18 is as described above.

In this embodiment, data transfer from the VM 11 to the VMM 10 is performed using exception processing, and the transfer program 110 is installed in the VM 11. Since the VM 11 does not need to release administrator authority to the VMM 10 for data transfer, data transfer is possible while maintaining the VM 11 security.
Further, since a slight change of installing the transfer program 110 in the VM 11 is sufficient, the data transfer function can be realized even after the server apparatus 1 starts operation.

  In the first embodiment, performance information, resource information, environment information, and the like can be considered as examples of data transferred from the VM 11 to the VMM 10. By analyzing such information, it becomes possible to improve operational management accuracy and capacity management accuracy. Also, by collecting the operation log, it becomes easy to investigate when a failure occurs.

  The timing at which the transfer program 110 is activated may be determined according to the nature of the data to be transferred. For data that needs to be collected regularly, the transfer program 110 is activated every predetermined time (once a week, once a day, once an hour) by a timer. For data that needs to be collected when an event occurs, the transfer program 110 may be activated when the event monitoring program detects the event.

Embodiment 2
In the first embodiment, data transfer is realized for exception handling by execution of a sensitive instruction. Therefore, when data transfer processing is performed, it is inconvenient if an exception with the same factor occurs due to other unrelated processing. This point is considered in the present embodiment. Since the hardware configuration is the same as that of the first embodiment, description thereof is omitted.

  FIG. 9 is a block diagram illustrating functions of the server device 1 according to the second embodiment. The function unit included in the VMM 10 includes an exception management unit 10f (permission unit). The exception management unit 10f has a function of managing whether to mask exception processing. The other configuration shown in FIG. 9 is the same as that of the first embodiment, and a description thereof will be omitted.

  FIG. 10 is a flowchart showing a data transfer processing procedure performed by the VMM 10 and the VM 11 according to the second embodiment. The data transfer process in this embodiment is the same as the process shown in FIG. 6, 7 or 8 except for a part, so FIG. 10 describes the process in a different VMM 10, and other parts are described. Is omitted. 10, processes similar to those in FIG. 6, FIG. 7, or FIG.

  In the data transfer process, the VM 11 issues a sensitive instruction (step S4) and generates an exception. When an exception occurs, the process moves to the VMM 10. The VMM 10 determines whether or not the exception correction factor is a factor determined in advance for data transfer (step S5). If the generation factor is predetermined (YES in step S5) and a specific value is set in the specific value region R00 of the general register R0 (YES in step S6), an exception (here, a halt instruction) due to the same factor The VMM 10 (exception management unit 10f) masks the exception so that multiple exceptions due to execution do not occur (step S21). To mask exceptions, for example: A mask is set by setting a predetermined bit (a bit corresponding to a halt instruction in this case) of a mask register in which a mask can be set for each exception factor to 1. Since the processes after masking the exception, steps S7, S8, S9, S12, and S13 are the same as those in the first embodiment, the description thereof is omitted. Since the same applies to step S11, the description thereof is omitted. After setting the return value in step S9 or step S13, the VMM 10 (exception management unit 10f) cancels the exception mask (step S22). In the above example, the mask bit corresponding to the halt instruction is set to 0. The VMM 10 ends the exception process (step S10). The process returns to the VM 11. Subsequent processing step S14 and subsequent steps are the same as those in the first embodiment, and thus description thereof is omitted.

Embodiment 3
In the first and second embodiments described above, it is assumed that the VMM 10 and the VM 11 that performs data transfer are single. In the present embodiment, a case will be described in which a plurality of VMs 11 and VMM 10 perform data transfer processing. Since the hardware configuration of the server apparatus 1 and the functions of the server apparatus 1 are the same as those in the first and second embodiments, the description thereof is omitted.

  FIG. 11 is an explanatory diagram showing a format example of the general-purpose register R0 according to the third embodiment. The general-purpose register R0 is divided into four areas. Since the specific value area R00, the transfer status area R01, and the used register number area R02 play the same role as in the first embodiment, the description thereof is omitted. In the general-purpose register R0 according to the third embodiment, a VMID region R03 is added. The VMID area R03 is an area for storing identification information given to each VM 11. By providing the VMIDR03, the VMM 10 can simultaneously perform data transfer processing with a plurality of VMs 11.

The data transfer process executed by the VMM 10 and VM 11 is the same as the process shown in FIG. 6, FIG. 7, FIG. 8, or FIG.
When the guest OS 120 of the VM 11 is activated, the VMM 10 issues an ID (identification information) that uniquely identifies the VM 11 and assigns it to the VM 11. The guest OS 120 writes the ID in a storage area such as the RAM 32.

  By using the ID in the data transfer process, the VMM 10 can identify the VM 11 from which the data has been transferred even if the VMM 10 exchanges data with a plurality of VMs 11 at the same time. In step S3, the VM 11 (setting unit 112) sets its own ID in the VMID region R03 of the general-purpose register R0 in addition to setting the specific value, the situation, and the number. In step S8, the VMM 10 (acquisition unit 10c) acquires the ID of the VM 11 set in the VM identification ID R03 of the general-purpose register R0 when acquiring data. The VMM 10 manages the acquired ID of the VM 11 by associating the acquired ID from the general-purpose register R1 with the data acquired from Rx (x = 2 to 14). Accordingly, when performing data analysis or the like, it is possible to perform analysis for each VM 11.

  In step S3, the VM 11 (setting unit 112) sets its own ID in the VM identification area R03 of the general-purpose register R0 in addition to the specific value and the situation. When determining whether or not the transmission is completed in step S12, the VMM 10 (acquiring unit 10c) acquires the VM 11 ID set in the VM identification area R03 of the general-purpose register R0. With the acquired ID, the VMM 10 (situation determination 10b) can determine which VM 11 has completed the data transfer processing.

  As described above, in the third embodiment, since the VMID area R03 is provided in the general-purpose register R0 that is the setting storage unit 130, the VMM 10 is the data from which VM 11 the data acquired in the data transfer process is Can be easily identified. Further, since the VMM 10 can be identified, the VMM 10 can simultaneously perform data transfer processing with the VM 11.

Embodiment 4
In the data transfer process in the first to third embodiments described above, the amount of data that can be transferred by one exception process is defined by the number of bits of the general-purpose register used as the data storage unit 140 and the number of general-purpose registers. Therefore, when the total amount of data to be transferred is larger than the specified amount of data that can be transferred in one exception process, the number of exception process executions increases, and the load on the CPU 30 of the server device 1 increases. In the present embodiment, processing is performed that makes the number of exception processing occurrences constant regardless of the total amount of transfer data.

FIG. 12 is a list showing an example of the transfer status according to the fourth embodiment. As shown in FIG. 12, in this embodiment, “transfer start” is added to the transfer status.
FIG. 13 is a block diagram illustrating functions of the server device 1 according to the fourth embodiment. In the server device 1 according to the fourth embodiment, a second determination unit 117 and a transfer unit 118 are added to the VM 11 in addition to the functional units included in the server device 1 according to the first to third embodiments. An issuing unit 10g and a deleting unit 10h are added to the VMM10. The second determination unit 117 determines the data transfer method from the capacity of the entire transfer data. The transfer unit 118 transfers data using a file transfer command. The issuing unit 10g has a function of issuing a temporary account for data transfer. The deleting unit 10h has a function of deleting the temporary account issued by the issuing unit 10g.

  FIG. 14 to FIG. 16 are flowcharts showing a data transfer processing procedure performed by the VMM 10 and the VM 11 according to the fourth embodiment. The VM 11 prepares data to be transferred (step S31). The preparation process may be performed by the transfer program 110 or may be performed by another application program that calls the transfer program 110. The VM 11 (second determination unit) determines whether or not the capacity of the entire transfer data is equal to or larger than a predetermined amount (threshold value) determined in advance (step S32). If the total capacity of the transfer data is less than the predetermined amount (NO in step S32), the transfer is repeated (step S33). Repeat transfer is the transfer method shown in the first to third embodiments. The contents of the processing are the same as the contents shown in FIG. 6, FIG. 7, FIG. 8, or FIG. If the total capacity of the transfer data is equal to or greater than the predetermined amount (YES in step S32), the VM 11 (setting unit 112) performs setting for charging a temporary account for transfer. That is, the VM 11 (setting unit 112) has a specific value indicating data transfer in the specific value area R00 of the general register R0, a value 2 indicating transfer start in the transfer status area R01 of the general register R0, and a VMID area R03 of the general register R0. Is set (step S34). The VM 11 (execution unit 113) executes a sensitive instruction and generates an exception (step S34). Processing moves from VM 11 to VMM 10.

  The VMM 10 (specific value determination unit 10a) checks whether the exception factor is due to a predetermined factor (step S36). When the VMM10 exception factor is predetermined (YES in step S36), the VMM10 (specific value determination unit 10a) reads a value set in the specific value region R00 of the general-purpose register R0, and the value is a specific value. It is determined whether or not there is (step S37). When the specific value is set (YES in step S37), the VMM 10 (exception management unit 10f) masks the exception (step S38). The VMM 10 (status determination unit 10b) reads the value set in the transfer status area R01 of the general-purpose register R0, and determines whether or not the value is a value indicating that transfer is in progress (step S39). If it is not a value indicating that the transfer is in progress (NO in step S39), the VMM 10 (situation determination unit 10b) determines whether or not the value set in the transfer state region R01 is a value indicating the start of transfer (step S40). . When the transfer is started (YES in step S40), the VMM 10 (issuing unit 10g) issues a temporary account (step S41). That is, the user name and password (connection information) are issued and set in the general-purpose register Rx (connection information storage unit). For example, the user name is set in the general-purpose register R1, and the password is set in the general-purpose register R2. The general-purpose register to be set is determined in advance. The VM 11 (result setting unit 10d) sets normal to the return value (step S42).

  When it is determined that the transfer is not started (NO in step S40), the VMM 10 (situation determination unit 10b) determines whether or not the value set in the transfer state region R01 is a value indicating completion of transfer (step S45). ). If the transfer is complete (YES in step S45), the VMM 10 (deleting unit 10h) deletes the temporary account (step S46). If the transfer is not complete (NO in step S45), the VMM 10 (result setting unit 10d) sets an error in the return value (step S47).

  When the value set in the transfer status area R01 of the general-purpose register R0 is a value indicating that transfer is in progress (YES in step S39), the VMM 10 (acquiring unit 10c) acquires data from the general-purpose register Rx (step S44). This is the same processing as step S8 described above. The VM 11 (result setting unit 10d) sets normal to the return value (step S42).

  If the exception factor is not a predetermined factor (NO in step S36), the VMM 10 executes an exception process determined for each factor (step S43). If the exception factor is predetermined but the value stored in the specific value area R00 is not a specific value (NO in step S37), the VMM 10 does not generate an exception due to the data transfer process. Is performed (step S43). The VM 11 (result setting unit 10d) sets normal to the return value (step S42).

  The VMM 10 (exception management unit 10f) releases the exception mask (step S48). The VMM 10 (end unit 10e) ends the exception process (step S49). The process returns to the VM 11.

  The VM 11 (determination unit 115) determines whether or not the return value is normal (step S50). If the return value is not normal (NO in step 50), the VM 11 (determination unit 115) returns the process to step S34 to retransmit the data. When the return value is normal (YES in step S50), the VM 11 (determination unit 115) determines whether or not the data transfer has been completed (step S51). Whether or not the transfer has been completed may be managed by a flag or the like. If the data transfer has been completed (YES in step S51), the VM 11 ends the process. If the data transfer has not been completed (NO in step S51), the VM 11 (transfer unit 119) acquires an account (user name, password) set in the general-purpose register Rx (step S52). The VM 11 (transfer unit 119) transfers data to the VMM 11 using the acquired account (step S53). For example, an ftp (file transfer protocol) command is used. The VM 11 (transfer unit 119) determines whether or not the data transfer is normally completed (step S54). If not completed normally (NO in step S54), the VM 11 (transfer unit 119) performs data transfer again (step S53). When the process ends normally (YES in step S54), the VM 11 (setting unit 112) sets a specific value indicating data transfer in the specific value area R00 of the general register R0 and a value 0 indicating transfer completion in the transfer status area R01 of the general register R0. Set (step S55). The VM 11 (setting unit 112) moves the process to step S35. The processing after step S35 is as described above.

As described above, in the fourth embodiment, it is only necessary to generate exception processing only twice when an account for data transfer is acquired and when data transfer is completed. Since the data transfer itself is performed using ftp etc. using the acquired account, even if the total amount of transfer data is large, the number of exception processing is constant, so that the data can be transferred efficiently. Become.
Further, as in the first embodiment, since a slight change of installing the transfer program 110 in the VM 11 is sufficient, the data transfer function can be realized even after the server apparatus 1 starts operation. An account used for data transfer is issued at the start of data transfer, and is deleted after the data transfer is completed. Therefore, data transfer is possible while maintaining the security of the VM 11.

  An example of data transferred from the VM 11 to the VMM 10 in the first to fourth embodiments will be described below. As shown in FIG. 2, the VM 11 shares one server device 1 and operates by switching. Therefore, effective results cannot be obtained even if performance analysis is performed for each VM 11 alone. Therefore, data collection and bird's-eye analysis that are centralized in one server device are required. The VMM 10 collects data (performance information, resource information, environment information, etc.) necessary for performance analysis from each VM 11 by the data transfer method described in the first to fourth embodiments described above. Overall, the performance analysis of each VM 11 operating on the server device 1 can be performed correctly.

  Then, by matching the resource information and environment information collected from each VM 11 with the measurement data of the resource change and performance event measured by the server device 1, centralized accurate performance analysis, behavior grasp, resource status grasp It becomes possible. This makes it possible to obtain data that is very useful for operation management such as predictive monitoring, performance management, provisioning, VM live migration destination determination, and capacity planning.

The technical features (components) described in each embodiment can be combined with each other, and a new technical feature can be formed by combining them.
The embodiments disclosed herein are illustrative in all respects and should not be considered as restrictive. The scope of the present invention is defined not by the above-mentioned meaning but by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

  Regarding the above embodiment, the following additional notes are disclosed.

(Appendix 1)
In an information processing apparatus that operates a plurality of virtual machines,
A collection unit that executes exception processing and collects data from the plurality of virtual machines;
Specific information indicating data transfer between the collection unit and the virtual machine, status information indicating the status of the data transfer, and a storage unit for storing the amount of data to be transferred;
A data storage unit for storing data to be transferred;
A return value storage unit for storing the return value,
The virtual machine has a writing unit for writing data to be transferred to the data storage unit;
An execution unit that executes an instruction that generates an exception, and causes the collection unit to execute an exception process;
A calculation unit that calculates the amount of untransferred data from the amount of transferred data;
A reading unit for reading a return value from the return value storage unit;
A determination unit for determining the status information indicating the status of data transfer and the data amount of data to be transferred from the data amount of the untransferred data calculated by the calculation unit and the return value read by the reading unit;
A second writing unit that writes the specific information, the determined status information, and the amount of data to be transferred to the storage unit, and
The collection unit determines whether or not the specific information is stored in the storage unit; and
A second reading unit for reading status information from the storage unit;
A third reading unit that reads data from the data storage unit when the read status information is being transferred;
A third write for writing a predetermined return value in the return value storage unit when the data amount of the data read from the data storage unit by the third reading unit matches the data amount stored in the storage unit And an information processing apparatus.

(Appendix 2)
When the determination unit determines that the specific information is stored in the storage unit, the collection unit disallows the generation of a new exception,
The information processing apparatus according to claim 1, further comprising: a permission unit that permits generation of a new exception after the third writing unit writes the processing result in the return value storage unit.

(Appendix 3)
Identification information for identifying the virtual machine is stored in the storage unit,
The second writing unit stores the specific information, the identification information, the situation information, and a data amount of the data to be transferred in the storage unit,
The information processing apparatus according to appendix 1 or 2, wherein the third reading unit reads the identification information from the storage unit.

(Appendix 4)
The information processing apparatus includes a connection information storage unit that stores connection information for connecting to the collection unit and executing a data transfer command,
When the virtual computer determines that the total amount of the transfer data is equal to or greater than a predetermined threshold, the second determination unit causes the determination unit to generate a transfer status indicating transfer start; and
Transfer that reads the account information from the connection information storage unit, connects to the collection unit using the read connection information, performs data transfer, and when the data transfer is completed, causes the determination unit to determine that transfer of the status information is complete And
The collection unit, when the status information read by the second reading unit is a transfer start, issues the connection information, and stores the issued connection information in a connection information storage unit;
An information processing apparatus comprising: a deletion unit that deletes the connection information when it is determined that the transfer status read by the second reading unit is transfer end.

(Appendix 5)
The information processing apparatus includes a CPU,
The virtual machine operates in a fully virtualized environment;
The CPU detects an exception generated by the virtual machine,
The information processing apparatus according to any one of appendix 1 to appendix 4, wherein the collection unit performs the exception processing.

(Appendix 6)
Operate multiple virtual machines,
In the exception handling related to the exception generated by the virtual machine, it is determined whether specific information indicating data transfer with the virtual machine is stored,
If the specific information is stored, read the transfer data stored by the virtual machine,
When the transfer data can be read, a predetermined return value is stored,
In a control program for an information processing apparatus including a collection unit that collects data from the plurality of virtual machines,
The information processing device operating as the virtual computer calculates the amount of untransferred data from the amount of transferred data,
The information processing apparatus operating as the virtual computer reads a return value stored by the collection unit,
From the data amount of the untransferred data calculated by the information processing apparatus operating as the virtual computer and the read return value, the status information indicating the data transfer status and the data amount of the data to be transferred are determined,
The information processing apparatus operating as the virtual computer stores specific information indicating data transfer, determined status information, and data amount of data to be transferred,
Storing transfer data transferred by the information processing apparatus operating as the virtual machine;
A control program, wherein the information processing apparatus operating as the virtual computer executes an instruction that causes an exception, and causes the collection unit to execute an exception process.

(Appendix 7)
In a control method of an information processing apparatus including a collection unit that operates a plurality of virtual machines, performs exception processing, and collects data from the plurality of virtual machines,
The virtual machine calculates the amount of untransferred data from the amount of data transferred to the collection unit,
Read the return value stored by the collection unit,
From the calculated amount of untransferred data and the read return value, status information indicating the status of data transfer and the amount of data to be transferred are determined.
Stores the specific information indicating the data transfer, the determined status information and the data amount of the data to be transferred,
Remember the data to transfer,
Execute an instruction that generates an exception, and cause the collection unit to execute an exception process;
When the specific information is stored in the collection unit,
When the stored status information is being transferred and the data amount of the read data matches the data amount of the data to be transferred, a predetermined return value is stored,
The information processing apparatus control method, wherein the virtual computer repeatedly performs the above process when the stored return value is a predetermined value and there is untransferred data.

1 Server device 10 VMM (collecting unit)
10a Specific value determination unit (determination unit)
10b Situation determination unit (second reading unit)
10c Acquisition unit (third reading unit)
10d result setting unit (third writing unit)
10e Ending part 10f Exception management part (permission part)
10g issuing part 10h deleting part 11 VM (virtual computer)
110 Transfer program 111 Storage unit (writing unit)
112 Setting unit (decision unit, second writing unit)
113 execution unit 114 calculation unit 115 determination unit (reading unit)
116 Generation Unit 117 Second Determination Unit 118 Transfer Unit 120 Guest OS
130 Setting storage unit (storage unit)
140 Data storage unit 150 Return value storage unit 30 CPU
31 ROM
32 RAM
33 Mass storage device 34 Communication unit 35 Reading unit 2 Terminal device 41, 42 Storage medium

Claims (6)

In an information processing apparatus that operates a plurality of virtual machines,
A collection unit that executes exception processing and collects data from the plurality of virtual machines;
Specific information indicating data transfer between the collection unit and the virtual machine, status information indicating the status of the data transfer, and a storage unit for storing the amount of data to be transferred;
A data storage unit for storing data to be transferred;
A return value storage unit for storing the return value,
The virtual machine has a writing unit for writing data to be transferred to the data storage unit;
An execution unit that executes an instruction that generates an exception, and causes the collection unit to execute an exception process;
A calculation unit that calculates the amount of untransferred data from the amount of transferred data;
A reading unit for reading a return value from the return value storage unit;
A determination unit for determining the status information indicating the status of data transfer and the data amount of data to be transferred from the data amount of the untransferred data calculated by the calculation unit and the return value read by the reading unit;
A second writing unit that writes the specific information, the determined status information, and the amount of data to be transferred to the storage unit, and
The collection unit determines whether or not the specific information is stored in the storage unit; and
A second reading unit for reading status information from the storage unit;
A third reading unit that reads data from the data storage unit when the read status information is being transferred;
A third write for writing a predetermined return value in the return value storage unit when the data amount of the data read from the data storage unit by the third reading unit matches the data amount stored in the storage unit And an information processing apparatus. When the determination unit determines that the specific information is stored in the storage unit, the collection unit disallows the generation of a new exception,
The information processing apparatus according to claim 1, further comprising: a permission unit that permits generation of a new exception after the third writing unit writes the processing result in the return value storage unit. Identification information for identifying the virtual machine is stored in the storage unit,
The second writing unit stores the specific information, the identification information, the situation information, and a data amount of the data to be transferred in the storage unit,
The information processing apparatus according to claim 1, wherein the third reading unit reads the identification information from the storage unit. The information processing apparatus includes a CPU,
The virtual machine operates in a fully virtualized environment;
The CPU detects an exception generated by the virtual machine,
The information processing apparatus according to claim 1, wherein the collection unit performs the exception processing. Operate multiple virtual machines,
In the exception handling related to the exception generated by the virtual machine, it is determined whether specific information indicating data transfer with the virtual machine is stored,
If the specific information is stored, read the transfer data stored by the virtual machine,
When the transfer data can be read, a predetermined return value is stored,
In a control program for an information processing apparatus including a collection unit that collects data from the plurality of virtual machines,
The information processing device operating as the virtual computer calculates the amount of untransferred data from the amount of transferred data,
The information processing apparatus operating as the virtual computer reads a return value stored by the collection unit,
From the data amount of the untransferred data calculated by the information processing apparatus operating as the virtual computer and the read return value, the status information indicating the data transfer status and the data amount of the data to be transferred are determined,
The information processing apparatus operating as the virtual computer stores specific information indicating data transfer, determined status information, and data amount of data to be transferred,
Storing transfer data transferred by the information processing apparatus operating as the virtual machine;
A control program, wherein the information processing apparatus operating as the virtual computer executes an instruction that causes an exception, and causes the collection unit to execute an exception process. In a control method of an information processing apparatus including a collection unit that operates a plurality of virtual machines, performs exception processing, and collects data from the plurality of virtual machines,
The virtual machine calculates the amount of untransferred data from the amount of data transferred to the collection unit,
Read the return value stored by the collection unit,
From the calculated amount of untransferred data and the read return value, status information indicating the status of data transfer and the amount of data to be transferred are determined.
Stores the specific information indicating the data transfer, the determined status information and the data amount of the data to be transferred,
Remember the data to transfer,
Execute an instruction that generates an exception, and cause the collection unit to execute an exception process;
When the specific information is stored in the collection unit,
When the stored status information is being transferred and the data amount of the read data matches the data amount of the data to be transferred, a predetermined return value is stored,
The information processing apparatus control method, wherein the virtual computer repeatedly performs the above process when the stored return value is a predetermined value and there is untransferred data.

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