JPH04155452A - Interruption system for virtual computer - Google Patents

Abstract

PURPOSE:To quickly inform an interruption by starting a virtual compute having an identifier(ID) displayed on a priority virtual computer ID display means to start interrupting processing. CONSTITUTION:This interruption system is provided with an executing virtual computer ID display means 3, an interrupted virtual computer ID display means, a priority virtual computer ID display means 4, the 1st coincidence detecting means 5 for detecting coincidence between IDs displayed by the former two display means, and the 2nd coincidence detecting means 6 for detecting coincidence between IDs displayed on the latter two display means. When the means 5 detects the coincidence, a virtual computer 11 having the ID displayed on the means 3 is interrupted, and when the means 6 detects the coincidence, a virtual computer 13 having the ID displayed on the means 4 is started to start its interrupting processing. Thereby, a virtual computer not in traveling can also be allowed to quickly recognize an interruption.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a computer system in which a plurality of virtual machines can run, and in particular, to a computer system that can promptly notify the corresponding virtual machine of an interrupt indicating the end of input/output, etc. This article concerns a method for interrupting virtual machines.

[Conventional technology]

The function of operating multiple computers mainly on a time-sharing basis under the control of the virtual machine monitor (VMM) is called the virtual machine function. At this time, the virtual machine monitor uses the resources of the actual computer (real machine) physically or temporally. The computer is divided into two parts and distributed to the computers that operate under it, that is, virtual machines (VMs). Therefore, when a virtual machine operates resources distributed to itself, control is passed to the virtual machine monitor, and the virtual machine monitor operates the real resources. This is done to ensure consistency in the operation of shared resources and to convert input/output device addresses that are logically assigned to each virtual machine.Originally, a virtual machine monitor is a virtual machine monitor. This is the main cause of overhead caused by this, so speeding up the processing of the virtual machine monitor will lead to improved performance of the virtual machine system.

In order to manage virtual machines, virtual machine monitors commonly assign each virtual machine a virtual machine identifier (VMID) that is unique within a real computer system. When the virtual machine monitor passes control to the virtual machine,
This virtual machine identifier is stored in a register within the processor. Also, when a virtual machine executes an input/output instruction,
A virtual machine identifier is sent to the input/output channel (input/output processor) along with information representing the input/output operation. Then, when a virtual machine identifier is sent from the input/output channel along with an interrupt signal that notifies the end of the input/output operation, the processor uses the identifier of the currently running virtual machine and the virtual machine identifier related to the sent interrupt. Compare them and have the virtual machine recognize the interrupt only when the two match. However, if the identifier of the running virtual machine and the virtual machine identifier associated with the interrupt do not match, the interrupt is suspended and recognized at the time of the next virtual machine dispatch or when the virtual machine changes the interrupt mask.

[Problem to be solved by the invention]

In this way, in the past, it was possible to immediately notify the end of an input/output operation if the virtual machine to which the interrupt was to be interrupted was running (running), but when the virtual machine to which the interrupt was to be interrupted was not running. and interrupts are put on hold, making prompt notification impossible.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to enable a specific virtual machine to immediately recognize an interrupt even if the virtual machine is not running.

[Means to solve the problem]

In order to achieve the above object, the present invention has the following objectives:
■The following configuration is adopted.

■First configuration Executing virtual machine identifier display means for displaying the identifier of the virtual machine currently being executed; interrupt destination virtual machine identifier display means for displaying the identifier of the interrupt destination virtual machine; a priority virtual machine identifier display means for displaying an identifier of a virtual machine that needs to be accepted immediately; and a match between the identifier displayed by the running virtual machine identifier display means and the identifier displayed by the interrupt destination virtual machine identifier display means. a first coincidence detection means for detecting a match; and a second coincidence detection means for detecting a coincidence between an identifier displayed by the priority virtual machine identifier display means and an identifier displayed by the interrupt destination virtual machine identifier display means. , if a match is detected by the first match detecting means, interrupt the virtual machine having the identifier displayed by the running virtual machine identifier display means, and if a match is detected by the second match detecting means, The virtual machine having the identifier displayed by the priority virtual machine identifier display means is activated to start interrupt processing.

■Second configuration Means for displaying an identifier of a running virtual machine as described above.

In addition to the interrupt destination virtual machine identifier display means and the first coincidence detection means, a first means for numerically comparing the identifier displayed by the running virtual machine identifier display means and the identifier displayed by the interrupt destination virtual machine identifier display means. 1 comparing means, when a match is detected by the first matching detecting means, the virtual machine having the identifier displayed by the running virtual machine identifier displaying means is interrupted, and the first comparing means If it is found that the numerical value of the identifier displayed by the interrupt destination virtual machine identifier display means is a numerical value defined as having a higher priority than the numerical value of the identifier displayed by the executing virtual machine identifier display means, The virtual machine having the identifier displayed by the interrupt destination virtual machine identifier display means is activated to start interrupt processing.

■Third configuration Means for displaying an identifier of a running virtual machine as described above.

In addition to the interrupt destination virtual computer mvh identifier display means and the first coincidence detection means, the identifier displayed by the running virtual machine identifier display means and the identifier displayed by the interrupt destination virtual machine identifier display means are set to predetermined virtual a conversion means for converting into a priority for a computer; an execution virtual computer priority display means for displaying the priority of the identifier displayed by the execution virtual machine identifier display means obtained by the conversion means; Interrupt destination virtual machine xIl priority display means for displaying the priority of the identifier displayed by the obtained interrupt destination virtual machine identifier display means, the priority displayed by the running virtual machine priority display means, and the interrupt and priority comparison means for comparing the priority displayed by the destination virtual machine priority display means, and when a match is detected by the first match detection means, the running virtual machine identifier display means displays. interrupting a virtual machine having an identifier, and in the priority comparison means, the priority displayed by the interrupt destination virtual machine Xll priority display means is higher than the priority displayed by the running virtual machine priority display means; If it is detected that
The virtual machine having the identifier displayed by the interrupt destination virtual machine identifier display means is activated to start interrupt processing.

[Effect]

In the first configuration, when an interrupt indicating the end of an input/output operation occurs and the interrupt destination virtual military machine identifier display means such as an input/output channel displays the identifier of the interrupt destination virtual computer, the first coincidence check The mountain means detects a match between the identifier related to the interrupt and the identifier of the currently executing virtual machine displayed on the executing virtual machine identifier display means, and if -, the executing virtual computer 1m! li
An interrupt is made to the virtual computer having the identifier displayed by the identifier display means, that is, the currently executing virtual computer. On the other hand,
The second match detection means detects a match between the identifier related to the interrupt and the identifier of the virtual machine that the computer system needs to immediately accept the interrupt, which is displayed on the priority virtual machine identifier display means. If they match, the virtual machine having the identifier displayed by the priority virtual machine identifier display means is activated to start interrupt processing.

In the second configuration, when the interrupt destination virtual machine 31E machine identifier display means displays the identifier of the interrupt destination virtual machine, if the identifier matches the identifier of the currently executing virtual machine, the first configuration The same operation is performed. Further, the comparison means numerically compares the identifier displayed by the executing virtual machine identifier display means and the identifier displayed by the interrupt destination virtual machine identifier display means, and the identifier displayed by the interrupt destination virtual machine identifier display means. If it turns out that the numerical value is defined as having a higher priority than the pre-identified numerical value displayed by the executing virtual machine identifier display means, the interrupt destination virtual machine identifier display means A virtual machine with the identifier to be displayed is activated and interrupt processing is started.

In the third configuration, when the interrupt destination virtual machine identifier display means displays the identifier of the interrupt destination virtual machine, if the identifier matches the identifier of the currently executing virtual machine, the first and second Operations similar to configuration are performed. The conversion means converts the identifier displayed by the running virtual machine identifier display means and the identifier displayed by the interrupt destination virtual machine identifier display means into a predetermined priority for the virtual machine, and displays the running virtual machine priority. The means displays the priority of the identifier displayed by the executing virtual machine identifier display means obtained by the converting means, and the interrupt destination virtual computer priority display means displays the interrupt destination virtual computer identifier obtained by the converting means. The means displays the priority of the identifier displayed, and the priority comparing means compares the priority displayed by the executing virtual machine priority display means and the priority displayed by the interrupt destination virtual machine priority display means. are doing. When the priority comparison means detects that the priority displayed by the interrupt destination virtual computer priority display means is higher than the priority displayed by the running virtual calculation m priority display means. , the virtual machine having the identifier displayed by the interrupt destination virtual machine identifier display means is activated and interrupt processing is started.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention. In the figure, a processor 1 is connected to an input/output channel 2, and internally contains registers 3, 4, . - matching detector 5.6, 7.
Includes ANDGATE 8.9.10. In addition, the first
12 indicates a virtual computer monitor, and 13 indicates a virtual computer (priority virtual computer) for which the computer system must immediately accept an interrupt.

The register 3 constitutes an executing virtual needle xIl identifier display means for displaying a virtual machine first identifier (running virtual machine identifier) RVMID which is currently being executed by the processor l. On the other hand, the register 4 constitutes a priority virtual machine identifier display means for displaying the identifier (priority virtual machine identifier) pvMID of the virtual machine 13.

The coincidence detector 5 receives the interrupt destination virtual machine identifier VMI sent from the input/output channel 2 through the signal line 51.
D and the running virtual machine identifier R held in register 3
The match detector 6 is a means for detecting a match between the interrupt destination virtual machine identifier VMID and the priority virtual machine identifier PVMrD held in the register 4, and detects a match between both. As a result, the output becomes "1". Further, the coincidence detector 7 is means for detecting a coincidence between the identifier VMID of the interrupt destination virtual machine and the identifier assigned to the virtual machine monitor 12, and when a coincidence is detected, the output becomes "1".

When a match is detected by the match detector 5, the AND gate 8 notifies the currently executing virtual calculation m1ll of an interrupt request indicating the end of the input/output operation sent from the input/output channel 2 through the signal line 52. When a match is detected by the match detector 6, the AND gate 9, which is a means for starting the tenth interrupt process, notifies the virtual machine monitor 12 of the above interrupt request and starts its priority virtual machine dispatch process 121. means, and gate 10
is a means for notifying the above interrupt request to the virtual machine monitor 12 and starting the interrupt processing 120 when the match detector 7 detects a match.

Next, the operation of this embodiment configured as described above will be explained.

An interrupt request for completion of the input/output operation is notified from the input/output channel 2 to the reprocessor 1 through the signal line 52. At the same time, the identifier VMID of the interrupt destination virtual machine is sent from the input/output channel 2 to the processor 1 via the signal line 51.

Note that virtual machine identifier = 0 means an interrupt to the real machine,
That is, it is defined as an interrupt to the virtual machine monitor 12. For this interrupt with the virtual machine identifier -0, the match detector 7 detects a match between the interrupt destination virtual machine identifier VMID (=0) sent through the signal line 51 and the constant "o", and the output It is recognized by ANDing the interrupt request on the signal line 52 with the AND gate 10. Then, the output of AND gate lO is “l”
As a result, the interrupt processing 120 within the virtual needle Xll monitor 12 is activated.

On the other hand, the running virtual machine identifier RVMID and the signal line 51
The match detector 5 checks whether or not the identifier VMID of the virtual military aircraft on the interrupt destination matches the priority virtual machine identifier PVMID, and the identifier VMID of the virtual military aircraft on the signal line 51 matches. The coincidence detector 6 checks whether or not this is the case. Then, the output of the match detector 5.6 which has failed becomes "1", and is ANDed with the interrupt request on the signal line 52 by the AND gates 8.9. Then, if the output of AND gate 8 becomes "1",
Interrupt processing number 10 of the first running virtual machine is activated. Further, when the output of the AND gate 9 becomes "l", the priority virtual machine dispatch process 121 in the virtual machine monitor 12 is activated. This priority virtual machine dispatch processing 121 is a software routine within the virtual machine monitor 12, and recognizes the interrupted priority virtual machine 13 (this is possible using the identifier in the register 4) and starts the priority virtual machine 13. As a result, the interrupt processing 130 of the priority virtual machine 13 is started.

As described above, according to this embodiment, although there is an overhead of priority virtual machine dispatch by software, the priority virtual machine I whose identifier is held in the register 4
! Since an interrupt to a priority virtual machine 13 can be recognized immediately even if the priority virtual machine 13 is not in execution, the system performance can be improved by not having to wait for a long time for an interrupt to the priority virtual machine 13.

FIG. 2 is a configuration diagram of another embodiment of the present invention, in which the present invention is applied to a computer system having a function of performing dispatch processing of a virtual machine using hardware or firmware. The difference from the embodiment shown in FIG. 1 is that when the output of the AND gate 9 becomes "1", that is, when the identifier PVMID of the priority virtual machine 13 and the identifier VMID of the interrupt destination virtual machine match. , by dispatching the priority virtual machine 13 using hardware or firmware, the priority virtual machine 13 is activated and its interrupt processing 130 is started. This embodiment is superior to the embodiment of FIG. 1 in that the overhead caused by the priority virtual machine dispatch process 121 of FIG. 1 is reduced.

In the embodiments shown in FIGS. 1 and 2, there is one priority virtual machine, but register 4. By providing a plurality of sets of coincidence detectors 6 and AND gates 9, it is possible to make a plurality of virtual computers the priority virtual computers.

FIG. 3 is a block diagram of yet another embodiment of the present invention. The difference between this embodiment and the embodiment shown in FIG.
In place of register 4 and match detector 6 in the figure, the running virtual machine identifier RVMID held in register 3 and the interrupt destination virtual machine identifier VMID on signal line 51
and numerically compare the identifier VMID with the identifier RVMI.
A comparator 20 is provided which outputs "1" when it is numerically smaller than D, and the output of this comparator 20 and the signal tili52 are
The above interrupt request is added to the AND gate 9. Note that here, the smaller the numerical value of the identifier, the higher the priority. Therefore, the identifier "OJ" has the highest priority.

Among the operations of the embodiment shown in FIG. 3, the operations related to interrupting the virtual computer monitor 12 and interrupting the first virtual computer being executed are the same as those in FIG. 1. Furthermore, if the identifier of the priority virtual machine 13 is numerically smaller than the identifier of the first virtual machine in execution, an interrupt whose interrupt destination is the priority virtual machine 13 is processed as follows.

First, the running virtual machine first identifier RVMJD held in register 3 and the signal! The comparator 20 compares the interrupt destination virtual machine identifier VMID on the interrupt destination virtual machine 151 with the identifier VMID. The comparator 20 receives the identifier VM on the signal line 51 as described above.
If the ID is numerically smaller than the identifier RVMID, “1
” is output.

When “l” is output from the comparator 20, the AND gate 9
The output becomes "1", and the priority virtual machine disbunch processing 121 in the virtual machine monitor 12 is activated in the same way as in the embodiment of FIG. 1, and finally the priority virtual machine 13 is activated and the interrupt processing 130 is started. be done. The priority virtual machine dispatch process 121 recognizes the priority virtual machine 13 by the identifier VMID on the signal line 51.

FIG. 4 is a block diagram of still another embodiment of the present invention.

The difference between this embodiment and the embodiment shown in FIG. 2 is as follows.
The running virtual machine identifier RVMI held in register 3 instead of register 4 and match detector 6 in FIG.
D and the interrupt destination virtual machine identifier VM on the signal line 51
Multiplexer 2 that inputs the ID and outputs one of them.
1, a priority table (PT) 22 in which priorities are registered in advance corresponding to each identifier and outputs the priorities corresponding to the identifiers output from the multiplexer 21; Running virtual machine identifier RVMI
Priority corresponding to D (current virtual machine priority) RPT
register 23 and register 24 that hold the priority (interrupt destination virtual machine priority) IPT corresponding to the interrupt destination virtual machine identifier VMID output from the priority table 22; A comparator 25 is provided, which compares the priorities held in 25 and the interrupt request on the signal line 52 are applied to the AND gate 9.

Among the operations of the embodiment shown in FIG. 4, the operations related to interrupting the virtual computer monitor 12 and interrupting the first virtual computer being executed are the same as those shown in FIG. If the priority registered in the priority table 22 corresponding to the identifier of the priority virtual machine 13 is higher than the priority registered in the priority table 22 corresponding to the 11th identifier of the running virtual calculation 4; , an interrupt whose destination is the priority virtual machine 13 is processed as follows.

First, the running virtual calculation I'll is displayed on the virtual computer monitor 12.
When activated by , multiplexer 22 selects the running virtual machine identifier RVMID in register 3. As a result, the priority table 22 is indexed by the identifier RVMID, and the corresponding priority RPT is stored in the register 23.

The contents of this register 23 will not be changed until another virtual machine is started by the virtual machine monitor 12 thereafter. Further, after updating the register 23, the multiplexer 21 is set to select the signal line 51.

An interrupt request is sent from the input/output channel 2 through the signal line 52 to the interrupt destination virtual machine identifier VMI on the signal line 51.
When it arrives with D, the identifier VMID on the signal line 51
The priority table 22 is indexed by , and the priority corresponding to the identifier ■MID of the current interrupt destination virtual machine is stored in the register 24 as the interrupt destination virtual machine priority IPT.

The interrupt destination virtual computer priority IPT stored in the register 24 and the running virtual computer priority RPT stored in the register 23 are input to a comparator 25 . The comparator 25 outputs "1" only when the interrupt destination virtual machine priority IPT is higher than the executing virtual machine priority RPT, that is, the former is smaller than the latter when compared numerically. As a result, the AND gate 9 is opened and its output becomes °1", and the hardware or firmware disables the priority virtual calculation recognized by the executing virtual computer 1 and the identifier on the signal line 51. 8, the priority virtual machine 13 is activated, and its interrupt processing 130 is started.

〔Effect of the invention〕

As explained above, according to the present invention, an interrupt can be quickly recognized for a specific virtual machine even if the virtual machine is not running. This can be expected to improve system performance.

In addition to the identifier of the running virtual machine, the computer system also holds the identifier of the virtual machine that immediately accepts interrupts, and the identifier of the interrupt destination virtual machine that is displayed with the interrupt request matches the above-mentioned held identifier. According to the method of starting a virtual machine with that identifier to process the interrupt when the interrupt is processed, it is possible to arbitrarily set the virtual machine for which the interrupt is to be recognized with priority, regardless of the virtual machine's identifier or priority. There is an effect that can make that change.

Furthermore, the identifier of the executing virtual machine is numerically compared with the identifier of the interrupt destination virtual machine, and even if the numerical value of the latter identifier is defined as having a higher priority than the numerical value of the former identifier. For example, according to a method of activating an interrupt destination virtual machine to process an interrupt, it is possible to set a virtual machine to be preferentially recognized for interrupts based on the size of an identifier that is unique within a real computer system.

Furthermore, it includes a conversion means for converting the identifier into a priority,
If the priority of the interrupt destination virtual machine obtained by this conversion means is higher than the priority of the running virtual machine obtained by the conversion means, the interrupt destination virtual machine is started and the interrupt is processed. This has the effect of making it possible to set a virtual machine whose interrupts are to be recognized preferentially, regardless of the identifier.

Additionally, if there is an ordering of priorities among virtual machines, by assigning a virtual machine identifier according to the priority or determining the priority for accepting interrupts, it is possible to use a virtual machine with a lower priority. Interrupts to high-priority virtual machines that occur during execution are no longer forced to wait as in the past.

[Brief explanation of drawings]

Fig. 1 is a block diagram of one embodiment of the present invention, Fig. 2 is a block diagram of another embodiment of the present invention, Fig. 3 is a block diagram of yet another embodiment of the present invention, and Fig. 4 is a block diagram of yet another embodiment of the present invention. It is a block diagram of yet another Example of this invention. In the figure, 1... Processor 2... Input/output channel 3.4, 23.24... Register 5.6.7... Coincidence detector 8.9.10... AND gate 1st... ...Running virtual machine 12...Virtual computer monitor 13...Priority virtual machine 20.25...Comparator 21...Multiplexer 22...Priority skin table 51, 52, 53...Signal line

Claims (3)

[Claims] (1) In a computer system capable of realizing multiple virtual machines, an executing virtual machine identifier display means that displays the identifier of the currently executing virtual machine, and an interrupt destination virtual machine identifier that displays the identifier of the interrupt destination virtual machine. a display means; a priority virtual machine identifier display means for displaying an identifier of a virtual machine for which the computer system needs to immediately accept an interrupt; and an identifier displayed by the running virtual machine identifier display means and the interrupt destination virtual machine. a first match detection means for detecting a match with an identifier displayed by the identifier display means; and a first match detection means for detecting a match between the identifier displayed by the priority virtual machine identifier display means and the identifier displayed by the interrupt destination virtual machine identifier display means. and a second match detection means for detecting a match, when the first match detection means detects a match, interrupts the virtual machine having the identifier displayed by the running virtual machine identifier display means, and detects the second match. An interrupt method for a virtual machine, characterized in that when a match is detected by the detection means, the virtual machine having the identifier displayed by the priority virtual machine identifier display means is activated to start interrupt processing. (2) In a computer system capable of realizing multiple virtual machines, an executing virtual machine identifier display means that displays the identifier of the currently executing virtual machine, and an interrupt destination virtual machine identifier that displays the identifier of the interrupt destination virtual machine. display means; first coincidence detection means for detecting a match between the identifier displayed by the running virtual machine identifier display means and the identifier displayed by the interrupt destination virtual machine identifier display means; and the display means for displaying the running virtual machine identifier. a first comparison means for numerically comparing the identifier displayed by the means and the identifier displayed by the interrupt destination virtual machine identifier display means, and when a match is detected by the first match detection means, the Interrupting a virtual machine having an identifier displayed by the executing virtual machine identifier display means, and in the first comparing means, the numerical value of the identifier displayed by the interrupt destination virtual machine identifier display means is displayed by the executing virtual machine identifier display means. If it is determined that the numerical value is defined as having a higher priority than the numerical value of the identifier to be processed, the virtual machine having the identifier displayed by the interrupt destination virtual machine identifier display means is activated and interrupt processing is started. An interrupt method for virtual machines that is characterized by the following: (3) In a computer system capable of realizing multiple virtual machines, an executing virtual machine identifier display means for displaying the identifier of the currently executing virtual machine, and an interrupt destination virtual machine identifier for displaying the identifier of the interrupt destination virtual machine. display means; first coincidence detection means for detecting a match between the identifier displayed by the running virtual machine identifier display means and the identifier displayed by the interrupt destination virtual machine identifier display means; and the display means for displaying the running virtual machine identifier. a conversion means for converting the identifier displayed by the means and the identifier displayed by the interrupt destination virtual machine identifier display means into a predetermined priority for the virtual machine; and means for displaying the running virtual machine identifier obtained by the conversion means. executing virtual machine priority display means for displaying the priority of the identifier displayed by the interrupt destination virtual machine priority display means for displaying the priority of the identifier displayed by the interrupt destination virtual machine identifier display means obtained by the conversion means; priority comparison means for comparing the priority displayed by the running virtual machine priority display means and the priority displayed by the interrupt destination virtual machine priority display means, If a match is detected by the match detection means, the virtual machine having the identifier displayed by the running virtual machine identifier display means is interrupted, and the priority comparison means determines the priority displayed by the interrupt destination virtual machine priority display means. is detected to have a higher priority than the priority displayed by the executing virtual machine priority display means, starts the virtual machine having the identifier displayed by the interrupt destination virtual machine identifier display means and processes the interrupt. A virtual machine interrupt method characterized by starting a virtual machine.