JP4728679B2 - Emulation apparatus, program and method - Google Patents

Description

  The present invention relates to an emulation device, a program, and a method, and more particularly, to an emulation device, a program, and a method for controlling a virtual device such as a virtual input / output device generated by an operating system.

  Emulation is performed by imitating a hardware function with another hardware having a different structure, and the hardware and software (middleware) for performing emulation are emulators.

  For example, in the “input / output control method for external storage device” disclosed in Patent Document 1, the main storage device (for example, variable-length record format) on the information processing device side and the external storage device (for example, fixed-length record format) are used. In order to exchange data between them, a data format conversion mechanism is provided on the information processing apparatus side, and the count part, key part, and data part in the variable length record format are handled as fixed length data. Both record format conversion tables are provided on the external storage device side. As a result, a plurality of types of external storage devices can be controlled by a single emulator (data format conversion mechanism).

  Further, in the “program execution apparatus and method of the first system on the second system” disclosed in Patent Document 2, the CPU is configured so that the application program operates even between computers having different operating systems. And a pseudo device driver (virtual device driver) PSDD that emulates various input / output devices. The interpreter and pseudo device driver PSDD include a CPU (HECPU), a memory ( HEMEM), a program for controlling various input / output drivers IOD (a kernel (a program given authority to operate hardware in the operation system)), a CPU, a memory, and an input / output device of the first system D To Yureto.

Japanese Patent Laid-Open No. 7-44324 (FIG. 3, paragraph 0017) JP-A-7-182180 (FIG. 2, paragraph 0071)

  By the way, the input / output devices include a printer, an external storage device, a display device, and the like, and each has various types of hardware. In the above-described conventional technology, one emulator is prepared for each device type (for external storage device in Patent Document 1 and for each type of CPU, memory, and input / output device in Patent Document 2), and when an input / output is requested. The device type is determined, and the emulator is requested to perform emulation processing. However, in this case, since there is only one emulation means for each device type, if multiple tasks using virtual devices of the same device type are executed, the load on the emulator increases, and input / output processing to the virtual device There is a problem that throughput decreases. In addition, there is a problem in that an emulation process for a job with a low priority is also executed with a high priority in order to quickly execute an emulation process for a job with a high priority.

  Therefore, an object of the present invention is to provide an emulation device that does not increase the load on the emulator and reduce the throughput of input / output processing to the virtual device even when a plurality of operations using the virtual device of the same device type is executed. It is to provide a method and a program. Also, an object of the present invention is to provide an emulation apparatus, method, and program that do not execute emulation processing of low priority business with high priority even if emulation processing of high priority business is executed quickly Is to provide.

  In the present invention, emulation means for emulating I / O for virtual devices is grouped by device type. Note that even for the same device type, the priority of execution of I / O operations is taken into consideration and the execution priority of the emulating means is differentiated so that important operations and I / O The O process may be processed with priority over the I / O process for another virtual device group.

  Therefore, an emulation device as means for solving the above-described problem includes a virtual device connected to an application program, and an emulation means for driving the virtual device, and each of the virtual devices includes the application program. And the emulation means drives the virtual device based on the priority. The grouping may be performed based on the priority order for executing the application program.

  Further, an emulation program as means for solving the above-described problem includes a group for grouping each of the virtual devices based on the application program in order to drive a virtual device connected to the application program. It functions as a dividing means and an emulating means for driving the virtual device based on the priority. The grouping may be performed based on the priority order for executing the application program.

  Further, an emulation method as means for solving the above-described problem is an emulation method for driving a virtual device connected to an application program, wherein each of the virtual devices is grouped based on the application program by grouping means. And a step of driving the virtual device based on the priority by the emulating means. The grouping may be performed based on the priority order for executing the application program.

  According to the present invention, load distribution can be performed for each virtual device group in the emulation processing. This is because a plurality of emulation means are prepared separately for each virtual device group, so that another emulation process can be performed without being affected by the emulation process of other virtual device groups. This is because the emulation processing can be executed in parallel by the number of virtual device groups.

Embodiments of the present invention will be described below with reference to the drawings.
[Embodiment 1]
(Configuration of Emulation Device of Embodiment 1)
FIG. 1 is a block diagram of an emulation apparatus according to the first embodiment.

  A device management definition information input device 20, a virtual device 30, and a real device 40 are connected to the emulation device 10 of the first embodiment. Here, the real device 40 is a device that is not the virtual device 30 (an input / output device that is not multiplexed and can be driven without requiring emulation).

  The emulation device 10 includes a device management table creation unit 110 that creates a device management table 101 and a virtual device group management that creates a virtual device group management table 102 that stores an I / O request notification semaphore (hereinafter referred to as “semaphore”) 103. The table creation means 120, the emulation starting means 130, the I / O request means 140, the I / O processing means 150, the emulation processing request means 160, and the emulation means 170 are included.

  The device management definition information input device 20 includes a device number of the real device 40 or the virtual device 30, device information, a virtual device flag (a flag for identifying the virtual device 30 and the real device 40), a virtual device group number (for the real device 40). The group number is not given), and the priority order (priority is not given to the real device 40) is input to the device management table creating means 110 described later.

  The device management table creation unit 110 includes, for all the real devices 40 and virtual devices 30 connected to the computer, device numbers, device information, a virtual device flag indicating whether or not the device is a virtual device, and a virtual device group number. And the information in which the priority order is defined is input from the device management definition information input device 20, and the device management table 101 is created.

  The virtual device group management table creation unit 120 inputs the virtual device group number and priority of the virtual device 30 from the device management table 101 created by the device management table creation unit 110, and creates the virtual device group management table 102. Also, a semaphore for each virtual device group (a flag for synchronizing operations between tasks that share I / O resources or a tool for processing the task. A task is a unit of an application program viewed from the operation system. ) And the semaphore address is stored in the virtual device group management table 102.

  The emulation activation unit 130 activates the emulation unit 170 according to the virtual device group management table 102. The I / O request unit 140 is a job for executing business processing (application program), and issues an I / O request.

  The I / O processing means 150 searches the device management table 101 using the device number of the I / O request, and the device of the I / O request is the real device using the virtual device flag of the entry corresponding to the device number. 40 or virtual device 30 is determined. In the case of I / O to the real device 40 in which the virtual device flag is not set, the I / O is executed on the real device 40. If the I / O is for the virtual device 30 for which the virtual device flag is set, the processing is transferred to the emulation processing requesting means 160.

  The emulation process request unit 160 refers to the virtual device group management table 102, acquires the address of the semaphore 103 in the virtual device group management table 102, and requests an emulation process of input / output to the virtual device. The emulation unit 170 executes an emulation process of input / output to / from the virtual device 30.

  Here, FIG. 2 is a diagram showing the contents of the device management definition information input from the device management definition information input device 20 to the device management table creating means 110. In the device management definition information input device 20, device information, virtual device flag ON / OFF, virtual device group number (may not be attached), priority for each device such as device numbers 0, 1, 2, 3, etc. Ranking (may not be) is given. FIG. 3 is a diagram showing the contents of the device management table 101, which is the same as that of the device management definition information input device 20. Further, FIG. 4 is a diagram showing the contents of the virtual device group management table 102. In the virtual device group management table 102, semaphore addresses and priorities are assigned to the virtual device groups 0, 1, 2, 3, and the like.

[Operation of Emulation Device of First Embodiment]
FIG. 5 shows a flowchart for explaining the operation when the emulation apparatus is started up. At the time of starting up the emulation device, the device management table creating unit 110 operates in S21, then the virtual device group management table creating unit 120 operates in S22, and finally the emulation starting unit 130 operates.

  FIG. 6 is a flowchart for explaining the operation when an I / O request is issued. When an I / O request is issued, the I / O request unit 140 operates in S31, then the I / O processing unit 150 operates in S32, then the emulation processing request unit 160 operates in S33, and finally S34. The emulating means 170 operates in FIG.

  Further, FIG. 7 shows a flowchart for explaining the operation of the device management table creating means 110. First, in S41, the device number and device information of one device is stored from the device management definition information input device 20, and the device management table 101 is created. Next, in S42, it is determined whether or not the device is a virtual device. Next, if it is determined in S42 that the device is the virtual device 30, the process proceeds to S43, a virtual device flag is set, and the virtual device group number and priority are stored in the entry of the device management table 101. On the other hand, if it is determined in S42 that the device is not the virtual device 30, the process proceeds to S44. In S44, it is determined whether or not flags have been set for all devices, and steps S41 to S43 are repeated until flag setting for all devices is completed.

  FIG. 8 is a flowchart for explaining the operation of the virtual device group management table creating unit 120. First, in S51, the device number, the virtual device group number, and the priority order of the virtual device on which the virtual device flag is set are input from the device management table 101. In step S52, the virtual device group management table 102 is searched to determine whether there is an entry for the virtual device group number. If it is determined in S52 that there is no entry for the virtual device group number, the process proceeds to S55, an entry for the virtual device group is added, and the process proceeds to S56. On the other hand, if it is determined in S52 that there is an entry for the virtual device group number, the processing from S53 to S54 is executed. That is, the priority order in the entry is extracted in S53. Next, in S54, it is determined whether or not the priority extracted in S51 is higher than the priority extracted in S53. If it is determined in S54 that the priority order extracted in S51 is higher, the process proceeds to S56.

  On the other hand, in S54, if the priority extracted in S51 is lower or the same, the process proceeds to S57. In S56, the priority extracted in S51 is set in the priority storage area in the entry corresponding to the virtual device group in the virtual device group management table 102. On the other hand, in S57, it is determined whether priority has been set for all virtual devices. If it is determined in S57 that the priority order has not been set for all virtual devices, the process returns to S51 and the priority order setting is repeated. In S57, if it is determined that the priority order has been set for all the virtual devices, the process proceeds to S58, in which one I / O request notification semaphore is assigned to each virtual device group, Each semaphore address is set in the semaphore address storage area of all entries in the group management table 102.

  FIG. 9 is a flowchart for explaining the operation of the emulation starting means 130. In S61, each emulation unit 170 is activated in the priority order of each virtual device group in the virtual device group management table 102. At this time, a semaphore address of each virtual device group in the virtual device group management table 102 is passed as an argument.

FIG. 10 is a flowchart for explaining the operation of each emulating means 170. First, in S71, an I / O request event is waited for with a semaphore address passed as an argument. Finally, in S72, I / O emulation is performed according to the content of the I / O request acquired from the semaphore. When the computer is started up and a business operation is performed, an input / output request to the apparatus is generated, and as shown in FIG. 6 , I / O request means 140, I / O processing means 150, emulation processing request means 160, and emulation means 170. I / O is processed in the order of. When input / output to / from the device is required during business processing, the I / O request unit 140 designates the device number of the target device and the contents of the I / O, and sends an I / O request to the I / O processing unit 150. Issue. The I / O processing means 150 searches the device management table 101 with the device number of the I / O request, and determines whether the device with the I / O request is a mounted virtual device with the virtual device flag of the entry corresponding to the device number. However, in the case of I / O for a real device for which no virtual device flag is set, I / O is executed for the real device. If the I / O is for a virtual device for which the virtual device flag is set, the processing is transferred to the emulation processing requesting means 160.

  FIG. 11 is a flowchart for explaining the operation of the emulation process request unit 160. First, in S81, the device management table 101 is searched, and the virtual device group number is acquired from the device entry of the I / O request. Next, in S82, the virtual device group management table 102 is referred to, and the semaphore address of the virtual device group is acquired. Finally, in S83, the semaphore 103 is notified of the device number of the virtual device 30 and the contents of the I / O. Upon receiving an event of an input / output request to the virtual device 30 from the semaphore 103, the emulation unit 170 executes the emulation process in the process of S72 shown in FIG. 10, and returns to S71 when the emulation process is completed.

  FIG. 12 is a block diagram of the emulation apparatus 10 when a plurality of tasks are being executed simultaneously and there are a plurality of I / O request means 140 for issuing I / O. Even if one emulation means 170 is in the process of being emulated, if another I / O request issued by another I / O request means 140 is another virtual device group, another emulation means 170 Emulation processing can be executed in parallel. For example, in the case of FIG. 12, when business job A performs I / O to device number 1 (virtual device group number 1), emulation is performed by emulating means 170A, and at the same time, business job B is device number 2 (virtual device group) In the case of performing I / O for the number 2), when a plurality of virtual device groups are set, such as emulating by the emulating means 170B, the emulating means operates as many as the number of groups, and as many I / O as the number of emulating means O requests can be executed simultaneously.

  As shown in FIG. 12, when the priority of the virtual device group number 1 of the device number 1 is 1 and the priority of the virtual device group number 2 of the device number 2 is 3, the I / O for the device number 1 of the job A The emulation means 170A is processed with priority.

(Emulation program of Embodiment 1)
As is apparent from the configuration and operation of the emulation apparatus according to the first embodiment, the emulation program according to the first embodiment uses a computer to drive a virtual apparatus connected to the application program, and each of the virtual apparatuses into the application program. It functions as grouping means for grouping based on the above, and as emulating means for driving the virtual device based on the priority order.

  Here, the grouping is performed based on the priority order of executing the application program.

  Further, when the computer further functions as I / O processing means for inputting an input / output request of the application program, and the input / output device connected to the application program is a real device, the I / O processing means Drives the real device, and when the input / output device is the virtual device, the emulation means drives the virtual device based on an input / output request from the I / O processing means.

  Further, device management table creating means for creating a device management table for storing the device number of the virtual device, the group number to which the computer belongs, the priority of the application program, and the device number of the real device. The I / O processing means may drive the real device based on the device management table.

  Further, the virtual device group management for creating the virtual device group management table for storing the computer, the group number to which the virtual device belongs, the semaphore of the virtual device, and the priority of the application program based on the device management table It further functions as a table creation unit, and the emulation unit drives the virtual device based on an input / output request from the I / O processing unit and the virtual device group management table.

(Emulation method of Embodiment 1)
FIG. 13 is a flowchart for explaining the emulation method of the first embodiment.

  First, in S131, device management definition information to be input from the device management information input device 20 to the device management table creating unit 110 is defined. In step S132, the device management definition information input from the device management definition information input device 20 is created in the form of the device management table 101 by the device management table creation unit 110. In step S133, the virtual device group management table creating unit 120 selects a virtual device group from the device management table 101, assigns a semaphore address, and stores the virtual device group in the virtual device group management table 102 together with the priority order. Next, in S134, it waits for an I / O request from the application program.

  Next, in S135, when the I / O processing unit 150 determines that the input / output device related to the I / O request is the virtual device 30, the process proceeds to S136, and the emulation processing request unit 160 causes the virtual device to The semaphore address of the I / O request is acquired from the group management table 102, and the acquired semaphore is transmitted to the emulating means 170. As a result, emulation starts in S137, and the virtual device 30 is driven in S138. That is, in S138, the real device 40 is emulated, and in S140, the real device 40 is driven to complete the entire emulation process.

  On the other hand, when the I / O processing unit 150 determines that the input / output device related to the I / O request is the real device 40 in S135, the process proceeds to S139, and the I / O processing unit 150 directly performs the I / O processing. The actual device 40 is driven by S140 where the processing is performed, and the I / O processing with the application program is completed.

(Effect of Embodiment 1)
According to the first embodiment, the emulation process can be load-balanced for each virtual device group. This is because a plurality of emulation means are prepared separately for each virtual device group, so that another emulation process can be performed without being affected by the emulation process of other virtual device groups. This is because the emulation processing can be executed in parallel by the number of virtual device groups.

[Embodiment 2]
(Configuration of Emulation Device of Embodiment 2)
FIG. 14 is a block diagram of the emulation apparatus according to the second embodiment. The emulation device 10 according to the second embodiment is connected to the device management definition information input device 20, the virtual device 30, and the real device 40. The emulation device 10 includes a device management table creation unit 110, a virtual device group management table creation unit 120, an emulation start unit 130, an I / O request unit 140, an I / O processing unit 150, and an emulation processing request. Means 160, priority order obtaining means 161, and emulating means 170 are included. The emulation apparatus according to the second embodiment is the same as the emulation apparatus according to the first embodiment except that the emulation apparatus further includes a priority order acquisition unit 161.

  The device management table creating unit 110 has a device number, device information, a virtual device flag indicating whether or not the device is a virtual device, a virtual device group number, and priority for all devices and virtual devices connected to the computer. The information in which the rank is defined is input from the device management definition information input device 20, and the device management table 101 is created. The virtual device group management table creation unit 120 inputs the virtual device group number and priority of the virtual device from the device management table 101 created by the device management table creation unit 110, and creates the virtual device group management table 102. A semaphore is assigned to each virtual device group and the semaphore address is stored in the virtual device group management table 102.

  The emulation activation unit 130 activates the emulation unit 170 according to the virtual device group management table 102. The I / O request unit 140 is a job that performs business processing, and issues an I / O request. The I / O processing means 150 searches the device management table 101 by the device number of the I / O request, and the device of the I / O request is the real device 40 or the virtual device 30 by the virtual device flag of the entry corresponding to the device number. Determine whether. In the case of I / O for an actual device for which no virtual device flag is set, I / O is executed for the actual device 40. If the I / O is for the virtual device 30 for which the virtual device flag is set, the processing is transferred to the emulation processing requesting means 160.

  The emulation process request unit 160 calls the priority order acquisition unit 161, then refers to the virtual device group management table 102, acquires the address of the semaphore 103, and uses the priority order acquired by the priority order acquisition unit 161. Requests emulation processing of input / output to / from. The priority order acquisition unit 161 refers to the device management table 101, acquires the priority order, and sends it to the emulation processing request unit 160. The emulation unit 170 executes an emulation process of input / output to / from the virtual device 30.

(Operation of Emulation Device of Embodiment 2)
As shown in FIG. 5, when the computer is started, the device management table creating unit 110, the virtual device group management table creating unit 120, and the emulation starting unit 130 operate.

  As shown in FIG. 7, the device management table creation means 110 inputs the device number and device information from the device management definition information input device 20 (FIG. 2) in the process of S41, and the device management table 101 (FIG. 2). Create an entry for. Next, in the processing from S42 to S43, if the device is a virtual device, a virtual device flag indicating whether or not the device is a virtual device is set, and the virtual device group number and priority are stored in the entry of the device management table 101. After step S44, S41 to S43 are repeated for all devices.

  As shown in FIG. 8, the virtual device group management table creating means 120 obtains the device number, virtual device group number, and priority of the virtual device with the virtual device flag from the device management table 101 in the process of S51. input. In the processing of S52, the virtual device group management table 102 (FIG. 4) is searched to search for the entry of the virtual device group number. If there is no entry, S55 is executed to add an entry, and S56 is executed. If there is an entry for the virtual device group number, the processing of steps S53 to S54 is executed. That is, the priority order in the entry is extracted, the priority levels extracted in S51 and S53 are compared, and if the priority level of S51 is higher, S56 is executed, and if the priority level of S51 is lower or the same, S57 is executed, and in S56, the priority order extracted in S51 is set in the priority order storage area in the entry corresponding to the virtual device group in the virtual device group management table 102. In S57, S51 to S56 are repeated for all virtual devices in the device management table 101. In S58, one I / O request notification semaphore is assigned to each virtual device group, and each semaphore address is set in the semaphore address storage area of all entries in the virtual device group management table 102.

  As illustrated in FIG. 9, the emulation starting unit 130 starts up each of the emulating units 170 with the priority of each virtual device group in the virtual device group management table 102 in the process of S61. At this time, a semaphore address of each virtual device group in the virtual device group management table 102 is passed as an argument.

As shown in FIG. 10, each emulating means 170 waits for an I / O request event at the semaphore address passed as an argument in the process of S71, and according to the contents of the I / O request acquired from the semaphore in S72. Emulate I / O.

As shown in FIG. 15, when the computer is started up and a business operation is performed, an input / output request to the apparatus is generated, the I / O request unit 140 operates in S140, and then the I / O processing unit 150 operates in S150. Subsequently, the emulation processing request unit 160 operates in S160, the priority order acquisition unit 161 operates in S161, and then the emulation unit 170 operates in S170. When input / output to / from the device is required during business processing, the I / O request unit 140 designates the device number of the target device and the contents of the I / O, and sends an I / O request to the I / O processing unit 150. Issue. The I / O processing means 150 searches the device management table 101 with the device number of the I / O request, and determines whether the device with the I / O request is a mounted virtual device with the virtual device flag of the entry corresponding to the device number. However, in the case of I / O for a real device for which no virtual device flag is set, I / O is executed for the real device. If the I / O is for a virtual device for which the virtual device flag is set, the processing is transferred to the emulation processing requesting means 160.

  The emulation processing requesting means 160 searches the device management table 101 in the processing of S181 shown in FIG. 16, and acquires the virtual device group number from the device entry of the I / O request. Next, in the process of S182, the device management table 101 is searched to obtain the priority from the device entry of the I / O request. Next, the semaphore address of the virtual device group is obtained by referring to the virtual device group management table 102 in the process of S183, and the device number and I / O of the virtual device 30 are obtained for the semaphore 103 in the process of S184. Notify the contents. At this time, in addition to the request for the emulation process, the priority order acquired by the priority order acquisition unit 161 is also transferred, and when the event for requesting the emulation process is accumulated, the events are queued so that they are arranged in the order of priority. . At this time, even if there is an I / O request already queued, if the priority of the subsequent I / O request is higher than that, the subsequent I / O request is the first I / O request. Queued before.

  As shown in FIG. 17, when an I / O of priority 2 is already queued to the semaphore for the device number 1 and an I / O of priority 1 is issued to the subsequent device number 2, the first I / O is issued. A later I / O request is interrupted before / O, and an I / O to a device with a higher priority is processed first.

  Finally, upon receiving the first request queued for an input / output request event from the semaphore 103 to the virtual device 30, the emulation unit 170 executes the emulation process in the process of S72 shown in FIG. When the emulation process is completed, the process returns to S71.

(Emulation program of Embodiment 2)
As is apparent from the configuration and operation of the emulation apparatus of the second embodiment, the emulation program of the second embodiment uses a computer to drive a virtual apparatus connected to the application program, and each of the virtual apparatuses to the application program. It functions as grouping means for grouping based on the above, and as emulating means for driving the virtual device based on the priority order. Here, the grouping is performed based on the priority order of executing the application program.

  Further, when the computer further functions as I / O processing means for inputting an input / output request of the application program, and the input / output device connected to the application program is a real device, the I / O processing means Drives the real device, and when the input / output device is the virtual device, the emulation means drives the virtual device based on an input / output request from the I / O processing means.

  Further, device management table creating means for creating a device management table for storing the device number of the virtual device, the group number to which the computer belongs, the priority of the application program, and the device number of the real device. The I / O processing means may drive the real device based on the device management table.

  Further, the virtual device group management for creating the virtual device group management table for storing the computer, the group number to which the virtual device belongs, the semaphore of the virtual device, and the priority of the application program based on the device management table It further functions as a table creation unit, and the emulation unit drives the virtual device based on an input / output request from the I / O processing unit and the virtual device group management table. Up to this point, the contents of the emulation program of the second embodiment are the same as those of the first embodiment.

  Furthermore, in the emulation program according to the second embodiment, the computer is further used as a priority acquisition unit that acquires the priority from the device management table and an emulation processing request unit that inputs the semaphore from the virtual device group management table. If the I / O processing request is received from the I / O processing unit, the emulation processing requesting unit is configured so that the priority of the device management table related to the I / O processing request and the virtual device group number The emulation means is driven based on the semaphore.

(Emulation method of Embodiment 2)
FIG. 18 is a flowchart for explaining the emulation method of the second embodiment. The emulation method of the second embodiment is the same as that of the first embodiment (FIG. 13) except that S136 shown in FIG. 13 is changed to S171.

  In S171, the emulation processing request unit 160 acquires the priority from the device management table, and acquires the semaphore from the virtual device group management unit. The reason is that the emulation processing requesting means 160 calls the priority order obtaining means 161, then refers to the virtual device group management table 102, obtains the address of the semaphore 103, and uses the priority order obtained by the priority order obtaining means 161. This is to request an emulation process of input / output to the virtual device 30.

(Effect of Embodiment 2)
According to the second embodiment, it is possible to request the emulation process of input / output to the virtual device 30 with the priority order acquired by the priority order acquisition unit 161, so that the job with the highest priority can be processed quickly. Since each emulation means is configured to execute the emulation process according to the priority order set for each virtual device, the emulation process can be prioritized for each virtual device even in the same virtual device group. In other words, the processing order of I / O changes according to the priority order set in the apparatus, and a task (I / O) to be processed with priority can be processed first.

[Embodiment 3]
(Configuration of Emulation Device of Embodiment 3)
FIG. 19 is a block diagram of an emulation apparatus according to the third embodiment. The emulation device 10 according to the third embodiment is connected to the device management definition information input device 20, the virtual device 30, the real device 40, and the console 50. The emulation device 10 includes a device management table creation unit 110, a virtual device group management table creation unit 120, an emulation start unit 130, an I / O request unit 140, an I / O processing unit 150, and an emulation processing request. A means 160, an emulating means 170, and a priority order changing means 181 are included. The emulation apparatus according to the third embodiment is the same as the emulation apparatus according to the second embodiment except that the emulation apparatus further includes a priority changing unit 181.

  The device management table creation unit 110, for all devices and virtual devices connected to the emulation device 10, has a device number, device information, a virtual device flag indicating whether or not the device is a virtual device, and a virtual device group number. Then, the information in which the priority order is defined is input from the device management definition information input device 20, and the device management table 101 is created.

  The virtual device group management table creation unit 120 inputs the virtual device group number and priority of the virtual device from the device management table 101 created by the device management table creation unit 110, and creates the virtual device group management table 102. A semaphore is assigned to each virtual device group and the semaphore address is stored in the virtual device group management table 102.

  The emulation activation unit 130 activates the emulation unit 170 according to the virtual device group management table 102. The I / O request unit 140 is a job that performs business processing, and issues an I / O request. The I / O processing means 150 searches the device management table 101 with the device number of the I / O request, and determines whether the device with the I / O request is a mounted virtual device with the virtual device flag of the entry corresponding to the device number. However, in the case of I / O for a real device for which no virtual device flag is set, I / O is executed for the real device. If the I / O is for a virtual device for which the virtual device flag is set, the processing is transferred to the emulation processing requesting means 160.

  The emulation process request unit 160 calls the priority order acquisition unit 161, then refers to the virtual device group management table 102, acquires the address of the semaphore 103, and sends it to the virtual device with the priority order acquired by the priority order acquisition unit 161. Requests emulation processing of input / output. The priority order acquisition unit 161 refers to the device management table 101, acquires the priority order, and sends it to the emulation processing request unit 160. The emulation unit 170 executes an emulation process of input / output to / from the virtual device 30. The priority changing unit 181 changes the execution priority of the emulating unit 170 corresponding to the designated virtual device group number.

  As shown in FIG. 5, when the computer is started, the device management table creating unit 110, the virtual device group management table creating unit 120, and the emulation starting unit 130 operate.

  As shown in FIG. 7, the device management table creating means 110 inputs the device number and device information from the device management definition information input device 20 (FIG. 2) in the process of S41, and the device management table 101 (FIG. 3). Create an entry for. If the device is a virtual device in the processing from S42 to S43, a virtual device flag indicating whether or not the device is a virtual device is set, and the virtual device group number and the priority order are stored in the entry of the device management table 101. After S44, S41 to S43 are repeated for all devices.

  As shown in FIG. 8, the virtual device group management table creating means 120 obtains the device number, virtual device group number, and priority of the virtual device with the virtual device flag from the device management table 101 in the process of S51. In the processing of S52 to be input, the virtual device group management table 102 (FIG. 12) is searched to search for an entry of the virtual device group number. If there is no entry, S55 is executed to add an entry, and S56 is executed. . If there is an entry for the virtual device group number, the processing from S53 to S54 is executed. That is, the priority order in the entry is extracted, the priority levels extracted in S51 and S53 are compared, and if the priority level of S51 is higher, S56 is executed, and if the priority level of S51 is lower or the same, S57 is executed, and in S56, the priority order extracted in S51 is set in the priority order storage area in the entry corresponding to the virtual device group in the virtual device group management table 102. In S57, S51 to S56 are repeated for all virtual devices in the device management table 101. In S58, one I / O request notification semaphore is assigned to each virtual device group, and each semaphore address is set in the semaphore address storage area of all entries in the virtual device group management table 102.

  As illustrated in FIG. 9, the emulation starting unit 130 starts up each of the emulating units 170 with the priority of each virtual device group in the virtual device group management table 102 in the process of S61. At this time, a semaphore address of each virtual device group in the virtual device group management table 102 is passed as an argument.

  As shown in FIG. 10, the emulation means 170 of each emulation means waits for an I / O request event with the semaphore address passed as an argument in the processing of S71, and performs I / O emulation in S72. .

  As shown in FIG. 15, when a computer is started up and a business operation is started, an input / output request to the apparatus is generated, and an I / O request unit 140, an I / O processing unit 150, an emulation processing request unit 160, a priority order are generated. The I / O is processed in the order of the acquisition unit 161 and the emulation unit 170.

  When input / output to / from the device is required during business processing, the I / O request unit 140 designates the device number of the target device and the contents of the I / O, and sends an I / O request to the I / O processing unit 150. Is issued. The I / O processing unit 150 searches the device management table 101 with the device number of the I / O request and determines whether the device of the I / O request is the real device 40 or the virtual device 30 from the entry corresponding to the device number. . In the case of I / O for the real device, I / O is executed for the real device 40. If the I / O is for the virtual device 30, the process is transferred to the emulation process request unit 160.

  As shown in FIG. 16, the emulation process request unit 160 searches the apparatus management table 101 in the process of S181 and acquires the virtual apparatus group number from the apparatus entry of the I / O request. Next, in step S182, the priority level acquisition unit 161 is called to search the device management table 101 and acquire the priority level from the device entry of the I / O request. In step S183, the virtual device group management table 102 is referenced to obtain the semaphore address of the virtual device group. In step S184, the device number of the virtual device 30 and the contents of the I / O for the semaphore 103 are acquired. To be notified. At this time, in addition to the request for the emulation process, the priority order acquired by the priority order acquisition unit 161 is also transferred. . Upon receiving the first request queued for an input / output request event from the semaphore 103 to the virtual device 30, the emulation means 170 executes the emulation process in the process of S72 of FIG. When is completed, the process returns to S71.

  When a priority change command is input from the console 50, the priority change means 181 receives the command and processes it.

  That is, the command specifies the device number and the priority after the change, and changes the priority of the corresponding virtual device group and the priority of the emulating means 170. When a command is input, the priority changing unit 181 analyzes the contents of the command, searches the device management table 101 with the device number, updates the priority in the entry, and further extracts the virtual device group number of the device. Then, an entry having the same virtual device group number is searched from the device management table 101, the highest priority among the entries is extracted, and compared with the priority of the entry of the virtual device group number in the virtual device group management table 102. If they do not match, the entry in the virtual device group management table 102 is updated to the highest priority. When the update is performed, the priority of the emulating unit 170 corresponding to the designated virtual device group number is changed regardless of whether the corresponding emulating unit 170 is operating.

  At this time, even if the I / O is to the same device, the emulating means 170 operates at the priority after the change after the command is input, so the I / O priority to the device changes.

  For example, as shown in FIG. 20, I / O to device number 1 issued from business job A has priority 3, and I / O to device number 2 issued from business job B has priority. 2, priority was given to I / O to device number 2 issued from business job B, but I / O to device number 1 issued from business job C has priority 1 after the command is input. Yes, since the priority of I / O to device number 2 issued from business job B is 2, I / O to device number 1 is given priority.

(Emulation program of Embodiment 3)
As is apparent from the configuration and operation of the emulation apparatus of the third embodiment, the emulation program of the third embodiment uses a computer to drive a virtual apparatus connected to the application program, and each of the virtual apparatuses to the application program. It functions as grouping means for grouping based on the above, and as emulating means for driving the virtual device based on the priority order. Here, the grouping is performed based on the priority order of executing the application program.

  Further, when the computer further functions as I / O processing means for inputting an input / output request of the application program, and the input / output device connected to the application program is a real device, the I / O processing means Drives the real device, and when the input / output device is the virtual device, the emulation means drives the virtual device based on an input / output request from the I / O processing means.

  Further, device management table creating means for creating a device management table for storing the device number of the virtual device, the group number to which the computer belongs, the priority of the application program, and the device number of the real device. The I / O processing means may drive the real device based on the device management table.

  Further, the virtual device group management for creating the virtual device group management table for storing the computer, the group number to which the virtual device belongs, the semaphore of the virtual device, and the priority of the application program based on the device management table It further functions as a table creation unit, and the emulation unit drives the virtual device based on an input / output request from the I / O processing unit and the virtual device group management table. Up to this point, the contents of the emulation program of the first embodiment are the same as those of the first embodiment.

  Furthermore, in the emulation program according to the third embodiment, the computer is further used as a priority acquisition unit that acquires the priority from the device management table and an emulation processing request unit that inputs the semaphore from the virtual device group management table. If the I / O processing request is received from the I / O processing unit, the emulation processing requesting unit is configured so that the priority of the device management table related to the I / O processing request and the virtual device group number The emulation means is driven based on the semaphore.

(Emulation method of Embodiment 3)
FIG. 21 is a flowchart for explaining the emulation method of the third embodiment. The emulation method of the third embodiment is the same as that of the second embodiment (FIG. 18) except that S200 is added.

  In S200, when a priority change is input to the priority changing unit 181 from the console 50 or the like, the process returns to S132 and the device management table is updated. That is, the priority order in the device management table 101 and the virtual device group management table 102 is immediately updated via the emulation processing request unit 160.

  Note that S200 is placed after the creation of the virtual device group management table (S133) and before the I / O request (S134). If there is no change in the priority order, the process returns to S134. S200 is placed after the creation of the virtual device group management table (S133) and before the I / O request (S134). However, the present invention is not limited to this, and it is between S132 and S133, between S134 and S135, and between S135 and S136. , S136 / S137, S137 / S138, etc. The branching based on the determination result conforms to the above example.

(Effect of Embodiment 3)
According to the third embodiment, the priority changing unit 181 provides a function of dynamically changing the priority of a virtual device, so that a task that uses any of the virtual devices needs to be subjected to priority processing immediately, or the virtual device When a business that uses is suddenly deferred, a temporary and abrupt change is possible, improving the freedom of business operation. In addition, work contents differ between daytime hours and nighttime hours, and even when work priorities change, it is possible to change the priorities accordingly, and it is possible to set priorities according to the work. .

  The field of application of the present invention is an emulation device that performs emulation for controlling a virtual device such as a virtual input / output device generated by an operating system, and a computer using the emulation device.

Block diagram of emulation device of embodiment 1 Example of device management definition information input device Example of device management table Example of virtual device group management table Emulator startup flowchart I / O request issuance flowchart Flow chart for entering priority in virtual device group management table Flow chart for adding a virtual device to the virtual device group management table Flowchart of Embodiment 1 for activating emulating means according to priority order Flow chart for emulating according to semaphore Flowchart of Embodiment 1 of Operation of Emulation Process Request Unit Block diagram of the emulation apparatus of the first embodiment having two I / O request means Flowchart of emulation method of embodiment 1 Block diagram of the emulation device of the second embodiment Flowchart of Embodiment 2 for activating emulating means according to priority order Flowchart of Embodiment 2 of Operation of Emulation Process Request Unit Block diagram showing the relationship between priorities and semaphore queues Flowchart of emulation method of embodiment 2 Block diagram of the emulation apparatus of the third embodiment Block diagram for explaining the specific operation of the emulation device of FIG. Flowchart of emulation method of embodiment 3

Explanation of symbols

10 emulation device 20 device management information input device 30 virtual device 40 real device 110 device management table creation means 120 virtual device group management table creation means 130 emulation start means 140, 140A, 140B I / O request means 150 I / O processing means 160 Emulation processing request means 170, 170A, 170B Emulation means 181 Priority change means

Claims (3)

Device management table creating means for creating a device management table, virtual device group management table creating means for creating a virtual device group management table, emulation starting means, I / O requesting means, I / O processing means, An emulation device comprising an emulation process request means and an emulation means, wherein a device management definition information input device, a virtual device divided into a plurality of groups, and a real device are connected,
  The device management table creation means includes, for the real device and the virtual device, a device number, a virtual device flag indicating whether the device is the virtual device or the real device, a group number, and a priority order. Is input from the device management definition information input device, to create the device management table consisting of these information,
  The virtual device group management table creating means inputs information including the group number and the priority for the virtual device from the device management table, creates the virtual device group management table composed of these information, and Assign a semaphore for each group, store the address of the semaphore in the virtual device group management table,
  The emulation activation means sequentially activates each of the emulation means according to the priority of the virtual device group management table, and passes the address of the semaphore of the virtual device group management table to each of the emulation means.
  The I / O request means issues an I / O request including the device number to the I / O processing means,
  The I / O processing means searches the device management table using the device number included in the I / O request, and determines whether the device to be I / O is the real device or the virtual device. From the virtual device flag, if the I / O is for the real device, I / O is executed for the real device, and if the I / O is for the virtual device, the emulation is performed. Pass the processing to the processing request means,
  The emulation processing requesting unit obtains the address of the semaphore corresponding to the virtual device that is the target of the I / O from the virtual device group management table, and sends the device number of the virtual device to the semaphore. Notify the contents of the I / O request,
  The emulation means waits for an event of the I / O request at the address of the semaphore, and executes an I / O emulation process to the virtual device according to the content of the I / O request acquired from the semaphore.
Emulation device. Further comprising priority order acquisition means for acquiring the priority order from the device management table;
  The emulation process requesting means notifies the priority obtained by the priority order obtaining means in addition to the device number of the virtual device and the contents of the I / O request to the semaphore.
The emulation device according to claim 1. Further provided with a priority changing means and further connected with a console.
  The priority change means changes the priority of the device management table when a priority change command is input from the console.
The emulation device according to claim 1 or 2.

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