JP2020126508A - Controller, method for controlling processor, and program - Google Patents

Abstract

To extremely increase the control performance of a controller which controls a plurality of processors at the same time.SOLUTION: The controller includes: a control processor for processing a control request of a plurality of controllers by using queue set at different priorities; a verification processor for sending a verification packet to the processors; and a queue management unit for storing a control request of a processor which has required the length of time not longer than a threshold value to response to the verification packet into a first queue set at a higher priority and storing control requests of the other processors into a second queue set at a lower priority than the first queue.SELECTED DRAWING: Figure 1

Description

The present invention relates to a control device, a processing device control method, and a program.

Patent Documents 1 and 2 disclose systems that allow a plurality of processing devices to perform distributed processing or parallel processing. In this type of system, a control device that centrally controls a plurality of processing devices is used. When controlling a large number of processing devices at the same time, this control device normally performs parallel processing of control for individual processing devices.

The control device (information processing device 10) of Patent Document 1 performs processing so that a processing request to a device of which processing time is longer than a predetermined value is transmitted before other devices. Determine the order of sending requests. Then, the control device (information processing device 10) transmits a processing request to each of the plurality of devices in the determined transmission order, and causes the plurality of devices to execute the processing in parallel.

The control device (management node) of Patent Document 2 selects a processing node to be the target of distributed processing based on the processing result of the test processing requested to each processing node.

Further, Patent Document 3 discloses an information processing device (standby system server) capable of improving the reliability of the system. This information processing apparatus includes a dummy packet transmission control unit that transmits a dummy packet with a transmission interval for each connection according to the priority when a failure occurs in the active server and the processing is transferred to the standby server. .. Further, the information processing apparatus includes a dummy packet reception control unit that determines whether each connection can be used based on the packet response. Further, the information processing apparatus includes a communication processing unit that continues communication with the client, which was performed by the active server, using the connection determined to be usable for communication.

JP, 2014-199534, A JP, 2006-344068, A JP, 2018-287787, A

The following analysis is given by the present invention. In the configuration in which the above-described control device controls a plurality of processing devices, the upper limit is set for the number of parallel operations. The reason is that if the processing capacity of the control device is used up, other processing cannot be performed.

In such a control device, when the number of processing devices to be controlled simultaneously exceeds the predetermined parallel number, the control of the subsequent processing device is made to wait until the control of the preceding processing device is completed. At this time, if the control device cannot connect to the preceding processing device, the control start of the subsequent processing device is further delayed. This problem is remarkable in the control using the connection type protocol, and waiting for connection establishment and waiting for timeout of response occupy most of the processing delay time.

Further, the state in which the control device cannot connect to the preceding processing device occurs due to an unexpected factor such as a network failure between the control device and the processing device or a failure of the processing device. In this case, it is difficult to predict the time until the failure is recovered, and the processing (including waiting) for the processing device that is not likely to recover the connection is a waste of time and processing resources. Such an inefficient operation also causes a problem that the user suspects that the operation of the control device is normal, such as when the user makes settings in the control device, it seems that the process has not progressed at all. Connect.

It is an object of the present invention to provide a control device, a control method for a processing device, and a program that can contribute to improving the control performance of a control device that simultaneously controls a plurality of processing devices.

According to the first aspect, a control processing unit that processes control requests from a plurality of processing devices using queues with different priorities, and a verification processing unit that transmits a verification packet to the plurality of processing devices. A control request of a processing device whose response time to the verification packet is equal to or less than a predetermined threshold is stored in a first queue having a high priority, and control requests of other processing devices are stored in the first queue. Also provided is a control device that includes a queue management unit that stores in a second queue having a low priority.

According to the second aspect, a control device including a control processing unit that processes control requests from a plurality of processing devices using queues with different priorities sets verification packets to the plurality of processing devices. The control request of the processing device which is transmitted and the time required for the response to the verification packet is equal to or less than a predetermined threshold is stored in the first queue having a high priority, and the time required for the response to the verification packet is the predetermined threshold. There is provided a method for controlling a processing device, wherein a control request for a processing device exceeding the above is stored in a second queue whose priority is lower than that of the first queue. The method is tied to a particular machine, a controller that controls multiple processing devices.

According to a third aspect, a computer mounted on a control device including a control processing unit that processes control requests from a plurality of processing devices by using queues with different priorities is assigned to the plurality of processing devices. On the other hand, a process of transmitting a verification packet, a process of storing a control request of a processing device whose response time to the verification packet is equal to or less than a predetermined threshold value in a first queue having a high priority, and a process for the verification packet. A program is provided for executing a process of storing a control request of a processing device whose response time exceeds a predetermined threshold value in a second queue having a lower priority than the first queue. This program is input to a computer device from an input device or an external device via a communication interface, stored in a storage device, and drives a processor in accordance with predetermined steps or processes. Further, this program can display the processing result including the intermediate state at each stage through the display device as required, or can communicate with the outside through the communication interface. As an example, a computer device therefor includes a processor, a storage device, an input device, a communication interface, and optionally a display device, which are typically connectable to each other by a bus.

According to the present invention, it is possible to dramatically improve the control performance of a control device that simultaneously controls a plurality of processing devices.

It is a figure which shows the structure of one Embodiment of this invention. It is a figure for demonstrating operation|movement of one Embodiment of this invention. It is a figure for demonstrating operation|movement of one Embodiment of this invention. It is a figure for demonstrating operation|movement of one Embodiment of this invention. It is a figure which shows the structure of the control apparatus of the 1st Embodiment of this invention. It is a figure which shows an example of the connection verification result hold|maintained at the verification data memory|storage part of the control apparatus of the 1st Embodiment of this invention. It is a flow chart showing operation (connection verification) of a control device of a 1st embodiment of the present invention. It is a flow chart showing operation (processing device control) of a control device of a 1st embodiment of the present invention. It is a figure which shows an example of the connection verification result hold|maintained at the verification data memory|storage part of the control apparatus of the 3rd Embodiment of this invention. It is a figure which shows the structure of the computer which comprises the control apparatus of this invention.

First, an outline of an embodiment of the present invention will be described with reference to the drawings. Note that the reference numerals in the drawings attached to this outline are added to the respective elements for convenience as an example for facilitating understanding, and are not intended to limit the present invention to the illustrated modes. Further, the connecting lines between blocks in the drawings and the like referred to in the following description include both bidirectional and unidirectional. The unidirectional arrows schematically show the flow of main signals (data), and do not exclude bidirectionality. The program is executed via a computer device, and the computer device includes, for example, a processor, a storage device, an input device, a communication interface, and a display device as necessary. The computer device is configured to be capable of communicating with a device (including a computer) inside or outside the device via a communication interface, whether wired or wireless. Further, although there are ports or interfaces at the input/output connection points of each block in the figure, they are not shown. In the following description, “A and/or B” is used to mean at least one of A and B.

In one embodiment thereof, the present invention can be realized by a control device 1 including a control processing unit 13, a verification processing unit 12, and a queue management unit 11, as shown in FIG. More specifically, the control processing unit 13 processes the control requests of the plurality of processing devices 2A and 2B by using the queues 14B and 14C to which different priorities are set. Here, it is assumed that the queue 14B has a higher priority than the queue 14C.

As shown in FIG. 2, the verification processing unit 12 transmits a verification packet to the plurality of processing devices 2A and 2B. The transmission timing of the verification packet does not have to be the same as in FIG. 2, and it is sufficient that the time required for the response to the verification packet can be measured.

Here, as shown in FIG. 3, the control device 1 is assumed to have received a response packet to the verification packet from the processing device 2A. On the other hand, it is assumed that the control device 1 cannot receive the response packet to the verification packet from the processing device 2B. The cause of the reception failure of the response packet is that the processing device 2B does not transmit the response packet, the processing device 2B transmits the response packet but does not reach the control device 1, and the response of the processing device 2B is delayed. It is possible that

In this case, as shown in FIG. 4, the queue management unit 11 sends to the first queue 14B having a high priority a control request of the processing device 2A in which the time required to respond to the verification packet is equal to or less than a predetermined threshold value. Store. On the other hand, the queue management unit 11 stores the control request of the other processing device 2B in the second queue 14C having a lower priority than the first queue.

The control processing unit 13 extracts and processes the control request from the queue 14B having a higher priority than the queue 14C. As a result, the control request of the processing device 2A whose time required for the response to the verification packet is equal to or less than the predetermined threshold is given priority, and the control request of the processing device 2B is postponed and processed.

As a result, according to the present embodiment, the control processing is sequentially performed from the connectable processing apparatuses 2A and 2B without wasting time waiting for connection establishment of the connection impossible processing apparatuses 2A and 2B and waiting for the response timeout. Can be processed. Further, in accordance with the above, the control device 1 does not behave as if the operation normality is suspected, and the user can easily confirm the operation normality.

[First Embodiment]
Subsequently, a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 5: is a figure which shows the structure of the control apparatus of the 1st Embodiment of this invention. Referring to FIG. 5, a control device 100 including a processing request unit 110, a verification processing unit 120, a control processing unit 130, processing queues 140A to 140C, a reception queue 150, and a verification data storage unit 160 is shown. Has been done. Further, processing devices 200A to 200E in the lower part of FIG. 5 indicate processing devices to be controlled by the control device 100. Hereinafter, the processing apparatuses 200A to 200E will be referred to as "processing apparatus 200" unless otherwise distinguished.

The processing request unit 110 periodically adds a connection verification request to the processing device 200 to be managed to the processing queue 140A. Further, the process requesting unit 110 acquires the connection verification result of the corresponding processing device 200 from the verification data storage unit 160 when executing the control process for the processing device 200. Then, the processing request unit 110 adds a control request to the processing queue 140B or the processing queue 140C according to the connection verification result of the corresponding processing device 200. Therefore, the processing request unit 110 functions as the queue management unit described above.

The verification processing unit 120 uses the processing thread 121 to perform the following processing.
(1) Transmission of Verification Packet First, the verification processing unit 120 extracts a connection verification request from the processing queue 140A, and based on the connection verification request, transmits the verification packet to the processing device 200 using a connectionless protocol.

The reason why the connection-type protocol is not used for the connection verification is to avoid wasting the time for waiting for connection establishment and waiting for timeout of response when the connection with the specific processing device 200 cannot be established. As a result, even a single processing thread 121 can process connection verification to multiple processing devices 200. It should be noted that the general processing apparatus 200 supports MIB (Management Information Base) information acquisition by SNMP (Simple Network Management Protocol). In this case, any MIB object acquisition that has a small amount of data and is invariable can be used for the verification packet.

(2) Monitoring Response to Verification Packet After the verification packet is transmitted, the verification processing unit 120 activates a timer for verification and monitors the storage of the response packet in the reception queue.

(3) Recording of Connection Verification Result When a response packet is stored in the reception queue 150 within a predetermined time-out period, the verification processing unit 120 causes the verification data storage unit 160 to store the response packet when the response packet is extracted from the reception queue 150. “Connectable” is stored as the connection verification result of the corresponding processing device 200. Further, the verification processing unit 120 stops the verification timer after extracting the response packet. On the other hand, when the response packet is not stored in the reception queue 150 within the predetermined timeout period and the verification timer expires, the verification processing unit 120 determines that the connection verification result of the corresponding processing device 200 is “connection disabled”. To store.

(4) Movement of Control Request Based on Connection Verification Result After the connection verification result is stored, the verification processing unit 120 confirms whether or not the connection verification results of the previous time and this time are different. Here, when the connection verification result has changed, the verification processing unit 120 moves the control request stored in the processing queue 140B or the control request stored in the processing queue 140C. For example, when the processing device 200 whose connection verification result is “connection possible” becomes “connection impossible”, the verification processing unit 120 sends a control request for the corresponding processing device 200 stored in the processing queue 140B. , To the processing queue 140C. Further, for example, when the processing device 200 whose connection verification result is “connection disabled” becomes “connection enabled”, the verification processing unit 120 requests the control request for the corresponding processing device 200 stored in the processing queue 140C. May be moved to the processing queue 140B. Here, “moving the control request” means deleting the corresponding control request from the transfer source queue and storing the corresponding control request in the transfer destination queue.

The control processing unit 130 uses the plurality of processing threads 131A and 131B to perform the following processing in parallel. In the following description, the processing threads 131A and 131B will be referred to as "processing threads 131" unless otherwise distinguished.

(1) Processing of Control Request The control processing unit 130 takes out a control request from the high-priority processing queue 140B or the low-priority processing queue 140C, and controls the processing device 200 based on the control request. The control request is extracted from the processing queue 140C when there is no control request in the processing queue 140B. Further, when the number of simultaneous processing of the control request fetched from the processing queue 140C has reached a predetermined upper limit value, the control processing unit 130 suppresses the fetching of the control request from the processing queue 140C.

(2) Movement of control request based on connection verification result Further, after storing the connection verification result at the timing of processing one control request, the control processing unit 130 determines whether or not the connection verification results of the previous time and this time are different. Check. Here, when there is a change in the connection verification result, the control processing unit 130, like the verification processing unit 120, sends the control request stored in the processing queue 140B or the control request stored in the processing queue 140C. Make a move. For example, when the processing device 200 whose connection verification result is “connectable” becomes “not connectable”, the control processing unit 130 sends a control request for the corresponding processing device 200 stored in the processing queue 140B. , To the processing queue 140C. Further, for example, when the processing device 200 whose connection verification result is “connection disabled” becomes “connection enabled”, the control processing unit 130 requests the control request of the corresponding processing device 200 stored in the processing queue 140C. May be moved to the processing queue 140B.

The processing queue 140A is a queue that can add and retrieve connection verification requests.

The processing queues 140B and 140C are queues that can add and retrieve control requests. The processing queue 140B is for high priority and the processing queue 140C is for low priority, and the control processing unit 130 takes out the control request according to the priority.

The reception queue 150 is a queue that can add and retrieve response packets.

The verification data storage unit 160 stores the connection verification result. FIG. 6 is a diagram showing an example of the connection verification result held in the verification data storage unit 160 of the control device 100. In the example of FIG. 6, the connection verification result can be accumulated a predetermined number of times in the past for each processing device.

The processing device 200 transmits a response packet in response to the verification packet from the control device 100 and performs a process based on a control request from the control device 100.

Next, the operation of this embodiment will be described in detail with reference to the drawings. FIG. 7 is a flowchart showing the operation (connection verification) of the control device according to the first embodiment of the present invention. The connection verification process starts when the processing request unit 110 periodically requests connection verification for each of the processing devices 200 managed by the control device 100. Here, the connection verification for the processing device 200B will be described as an example.

The processing request unit 110 adds a connection verification request for the processing device 200B to the processing queue 140A (step S101).

Upon detecting the update of the processing queue 140A, the verification processing unit 120 takes out a connection verification request from the processing queue 140A (step S102).

Based on the connection verification request, the verification processing unit 120 transmits a verification packet to the processing device 200B by a connectionless protocol (for example, SNMP in UDP) (step S103).

Next, the verification processing unit 120 activates a verification timer (step S104), and confirms whether or not a response packet has been received before the verification timer expires (step S105).

As a result of the confirmation, when the response packet from the processing device 200B is received before the expiration of the verification timer (YES in step S105), the verification processing unit 120 extracts the response packet from the reception queue 150 (step S106). Next, the verification processing unit 120 stops the verification timer (step S107). Further, the verification processing unit 120 registers the connection verification result “connectable” of the processing device 200B in the verification data storage unit 160 (step S108).

On the other hand, as a result of the confirmation, if the response packet from the processing device 200B cannot be received before the expiration of the verification timer (NO in step S105), a timeout occurs. In this case, the verification processing unit 120 registers the connection verification result “connection impossible” of the processing device 200B in the verification data storage unit 160 (step S109).

Next, the verification processing unit 120 refers to the verification data storage unit 160 and confirms whether or not the connection verification results of the previous time and this time are different (step S110). As a result of the confirmation, if the connection verification result of the previous time is different from the connection verification result of this time (YES in step S110), the verification processing unit 120 adjusts the arrangement of the control requests of the processing queue 140B and the processing queue 140C (step S111).

Here, the adjustment of the allocation of control requests by the verification processing unit 120 will be described. There are two cases in which the connection verification results of the previous time and the current time are different, that is, the case where “connection is possible” is changed to “connection is not possible” and the case where “connection is impossible” is changed to “connection is possible”. For example, as a result of the above-described connection verification processing, when the processing device 200 that is “connectable” is “not connectable”, the verification processing unit 120 sends the control request of the processing device 200 of the processing queue 140B to the processing queue. Move to 140C. On the contrary, when the processing device 200 that has been “not connectable” becomes “connectable”, the verification processing unit 120 moves the control request of the processing device 200 of the processing queue 140C to the processing queue 140B.

In addition, in step S110, when the previous and present connection verification results are the same, the verification processing unit 120 ends the series of processes (NO in step S110).

By referring to the verification data held in the verification data storage unit 160 as a result of the above connection verification processing, it is possible to determine whether or not the processing device 200B is a connectable device.

Next, control of the processing device 200 using the verification data held in the verification data storage unit 160 will be described. FIG. 8 is a flowchart showing the operation (processing device control) of the control device according to the first embodiment of the present invention. The process of FIG. 8 is started when the user requests the control device 100 to control the processing device 200. In the following description, it is assumed that the connection verification process shown in FIG. 7 is performed at least once in each processing device 200. If the connection verification has never been performed, the control device 100 first performs the connection verification process of FIG. 7, waits until the connection verification process is completed, and then starts the control of the processing device of FIG. 8. It will be.

In the following description, it is assumed that the processing device 200D or the processing device 200E is controlled. It is assumed that the results of the connection verification of the processing devices 200D and 200E are “connectable” and “not connectable” as shown in FIG. 6, respectively.

Referring to FIG. 8, first, the process requesting unit 110 refers to the connection verification result of the control target processing device 200 from the verification data storage unit 160 (step S201).

The process requesting unit 110 confirms whether the connection verification result indicates that the connection is possible (step S202). In the case of the processing device 200D, the connection verification result is "connection is possible" (YES in step S202), and thus the process proceeds to step S203. On the other hand, in the case of the processing device 200E, since the connection verification result is "connection impossible" (NO in step S202), the process proceeds to step S204.

When the connection verification result is “connection possible”, the processing request unit 110 adds a control request for the processing device 200D to the high-priority processing queue 140B (step S203).

On the other hand, when the connection verification result is “connection disabled”, the processing request unit 110 adds a control request for the processing device 200E to the low-priority processing queue 140C (step S204).

The control processing unit 130, which has detected the update of the processing queue 140B or the processing queue 140C, first confirms the control request of the processing queue 140B having high priority (step S205).

As a result of the confirmation, when the control request exists in the processing queue 140B (YES in step S206), the control processing unit 130 takes out the control request for the processing device 200D from the processing queue 140B by the processing thread 131A (step S207).

On the other hand, as a result of the confirmation, if there is no control request in the processing queue 140B (NO in step S206), the control processing unit 130 confirms the number of simultaneous processing of low-priority control requests. Specifically, the control processing unit 130 determines whether or not the number of processing threads 131 processing low priority control requests in the processing threads 131B has reached the upper limit of the number of simultaneous processing of low priority control requests. Confirm (step S208). Here, when the number of concurrently processed low-priority control requests reaches the upper limit, the control processing unit 130 ends the processing (YES in step S208).

Here, the reason why the upper limit is set for the number of simultaneous processing of low-priority control requests will be described. When all the processing threads 131 are processing the low-priority control request fetched from the processing queue 140C, when a new high-priority control request is added to the processing queue 140B, the high-priority control request is processed. Because it will not be possible to start. For example, when N processing threads 131 can be used, the processing thread 131 can simultaneously process up to N high-priority control requests fetched from the processing queue 140B. At this time, by setting the upper limit of the number of simultaneous processing of the low-priority control requests to be taken out from the processing queue 140C to N/2, it is possible to prevent the high-priority control requests from being awaited against the priority. Of course, the simultaneous processing number (N/2) of the low-priority control requests is just an example, and is changed according to the performance of the control device 100 and the required performance required by the user within a range not exceeding N. It is possible.

On the other hand, when the number of concurrently processed low-priority control requests has not reached the upper limit (NO in step S208), the control processing unit 130 takes out the control request for the processing device 200E from the processing queue 140C by the processing thread 131B (step S209). ).

In steps S207 and S209, it is preferable to skip the control request for the same processing device 200 during the control process of the specific processing device 200 by the preceding control request. The reason is that if the same processing apparatus 200 is controlled by a plurality of processing threads 131, control contention may occur. Therefore, by this skip processing, it becomes possible to process only one control request to the same processing device 200 at the same time.

The control processing unit 130, which has extracted the control request in steps S207 and S209, controls the processing device 200 in the processing thread 131 based on the control request (step S210).

The reason why the control request is processed by the plurality of processing threads 131 is that the plurality of processing devices 200 can be controlled simultaneously. The number of processing threads 131 is adjusted according to the processing capacity of the control device 100.

In general, in the control of the processing device, like the connection verification process, the control to the processing device 200 is asynchronous and cannot be processed by a single processing thread 131. This is because it is necessary to perform a plurality of controls on the processing device 200 in order without omission. This is because it is unrealistic to individually implement the order control and the retransmission control, and it is optimal to entrust the order control and the retransmission control to a connection-type protocol (for example, SSH and HTTP in TCP). Another reason is that the control protocol supported by the general processing device 200 is limited to the connection type (generally, a connectionless type protocol such as SNMP is not used for the control type). Not supported for reference only). It should be noted that TCP is an abbreviation for Transmission Control Protocol, SSH is an abbreviation for Secure Shell, and HTTP is an abbreviation for Hypertext Transfer Protocol.

As an example, in the state where the control request for the processing device 200D is added to the processing queue 140B and the control request for the processing device 200E is added to the processing queue 140C, the control request for the processing device 200D added to the processing queue 140B having the higher priority is It is processed with priority. Furthermore, in the state where the control requests for the large number of processing devices 200 are added to the processing queue 140B, the control requests for the processing devices 200E added to the low-priority processing queue 140C are postponed.

In this embodiment, every time the control of the processing device 200 is performed, the control processing unit 130 verifies the connection verification result and determines the rearrangement of the control request based on the verification result.

Specifically, the control processing unit 130 determines the connection verification result (connection is possible when a high-priority control request is processed, connection is not possible when a low-priority control request is processed), and the actual processing. It is confirmed whether or not the connection result under the control of the device 200 is different (step S211).

The following cases can be considered as cases where the connection verification result and the actual connection result are different.
(1) Case in which connection to the processing device 200 cannot be established during high-priority control processing In this case, in the situation where the connection cannot be continued, processing the next control request with high priority results in waste of time. , It is necessary to relocate the control request.
(2) Case where connection to the processing device 200 is enabled during low-priority control processing In this case as well, if the next control request is processed with low priority, the control request is processed even though connection is possible. Since the start is delayed, it is necessary to rearrange the control requests in this case as well.

Specifically, the control processing unit 130 stores the actual connection result as the connection verification result in the verification data storage unit 160 when the connection verification result is different from the actual connection result under control of the processing device 200. (Step S212). By this processing, the processing request unit 110 will add a control request to the processing queue 140B or the processing queue 140C based on the actual connection result after the next time.

Then, the control processing unit 130 adjusts the arrangement of the control requests in the processing queue 140B and the processing queue 140C (step S213). For example, when the processing request unit 110 adds the control request of the processing device 200 that is “connectable” to the processing queue 140B and the control processing unit 130 processes the preceding control request of the same processing device 200, the processing device concerned If the connection to 200 is no longer possible, a wait state will occur. In order to avoid this, the control processing unit 130 moves the control request of the processing device 200 of the processing queue 140B to the processing queue 140C. On the contrary, when the processing device 200 that cannot be connected becomes connectable, the control processing unit 130 moves the control request of the processing device 200 in the processing queue 140C to the processing queue 140B.

As a result of the determination in step S211, if the connection verification result is the same as the actual connection result of control to the processing device 200, the control processing unit 130 ends the series of processes (step S211). NO).

The process of step S213 is the same as the process of adjusting the allocation of the control request in step S111 described with reference to FIG. As a result, the control request added to the processing queue 140B or the processing queue 140C can be processed with the correct priority in synchronization with the change in the verification result.

Through these processes, the control process proceeds sequentially from the connectable processing device 200 without wasting time waiting for connection establishment of the connectable processing device 200 and waiting for a response timeout. As a result, the user can also check the operation normality of the control device 100.

As described above, according to the control device 100 of the present embodiment, the control performance is improved and the system operation load of the user is reduced. The reason is that, when the user sets the control device 100, the connectable processing device 200 preferentially completes the control and immediately starts the service. Further, according to the present embodiment, a configuration is adopted in which the operation normality of the control device 100 can be confirmed by the progress status of the control completion of the processing device 200, so that the user's system operation load is also reduced in this respect. It has become a thing.

[Second Embodiment]
Subsequently, a second embodiment of the present invention will be described with reference to the drawings. The second embodiment can be realized with the same configuration as that of the first embodiment. Therefore, the differences will be mainly described below while comparing the two.

In the first embodiment, the control request is added to the low-priority processing queue 140C in the expectation that the connection status will be improved even in the processing device 200 that cannot be connected. On the other hand, in the second embodiment, for the processing device 200 that cannot be connected, the control request is discarded without being added to the processing queue 140C. As a result, in the second embodiment, it is not necessary to wait for control by the processing device 200 that cannot connect.

In the second embodiment, in a situation where the user inputs the setting to the control device 100 first and connects the processing devices 200 in order afterwards, it is known that the connection is impossible. This is useful as a method for avoiding useless control processing.

[Third Embodiment]
Subsequently, a third embodiment of the present invention will be described with reference to the drawings. Since the third embodiment can be realized with the same configuration as the second embodiment, the differences will be mainly described below while comparing the two.

In the second embodiment described above, in the connection verification process, if the response packet transmitted from the processing device 200 arrives after the verification timer expires, it is uniformly discarded. In the third embodiment, a change is made in that, even if the delay time is reached after the verification timer expires, if the delay amount is small, it is registered in the processing queue C.

More specifically, as shown in FIG. 9, the time difference between the transmission time of the verification packet and the reception time of the response packet (the time when the response packet is extracted from the reception queue 150) is stored in the verification data storage unit 160. .. Then, this time difference is used to determine whether to store the control request in the queue.

For example, when the time difference XX seconds of the processing device 200E in FIG. 9 is within a predetermined allowable range, the processing requesting unit 110 of the third embodiment controls the processing device 200E in the low-priority processing queue 140C. Add a request. As a result, even when some of the processing devices 200, for example, the processing device 200E are physically located at a long distance and a delay occurs, it is possible to add them to the control targets. On the other hand, when the time difference YY seconds of the processing device 200F in FIG. 9 exceeds the predetermined allowable range, the control request of the processing device 200F is discarded as in the second embodiment. This makes it possible to avoid wasting time consuming waiting for a connection to be established by the processing device 200F and waiting for a response timeout.

Although the respective embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and further modifications, replacements, and adjustments can be made without departing from the basic technical idea of the present invention. Can be added. For example, the device configuration, the configuration of each element, and the expression form of data shown in each drawing are examples for helping understanding of the present invention, and are not limited to the configurations shown in these drawings.

Further, the procedures shown in the above-described first to third embodiments can be realized by a program that causes a computer (9000 in FIG. 10) functioning as the control device 1, 100 to realize the function as the control device 1, 100. Is. Such a computer is exemplified by the configuration including the CPU (Central Processing Unit) 9010, the communication interface 9020, the memory 9030, and the auxiliary storage device 9040 of FIG. That is, the CPU 9010 in FIG. 10 may execute the verification processing program and the processing request (queue management) program to update the respective calculation parameters held in the auxiliary storage device 9040 or the like.

That is, the respective units (processing means, functions) of the control devices 1 and 100 shown in the above-described first to third embodiments use the hardware of the processors installed in these devices to perform the above-mentioned operations. It can be realized by a computer program that executes processing.

Finally, a preferred form of the invention is summarized.
[First mode]
(Refer to the control device according to the first aspect)
[Second mode]
The queue management unit of the control device stores a verification request for requesting the verification processing unit to transmit the verification packet in a third queue,
The verification processing unit may be configured to take out the verification request from the third queue and start transmitting the verification packet.
[Third mode]
The verification processing unit of the control device described above, records the change whether the time required for a response to the verification packet is less than or equal to the predetermined threshold value,
The queue management unit refers to the verification data, and when a change occurs in a state of whether the time required for the processing device to respond to the verification packet is equal to or less than the predetermined threshold value, A configuration in which the control request is moved from one queue to the second queue or the control request is moved from the second queue to the first queue can be adopted.
[Fourth form]
In the above-described control device, it is preferable that the control processing unit has an upper limit on the number of simultaneous processings of the control requests taken out from the second queue.
[Fifth form]
The queue management unit of the control device described above moves the control request from the first queue to the second queue or transfers the control request from the second queue to the second queue according to a result of processing of the control request. It is also possible to adopt a configuration in which the control request is moved to the first queue.
[Sixth form]
The queue management unit of the control device described above may be configured to suppress registration of a control request of a processing device that does not respond to the verification packet to the second queue.
[Seventh form]
The queue management unit of the above-described control device, when the time required for the processing device to respond to the verification packet exceeds the predetermined threshold value and is within a predetermined range, stores the data in the second queue. A configuration for storing the control request of the processing device can also be adopted.
[Eighth mode]
The verification processing unit of the control device may be configured to transmit the verification packet to the processing device using a connectionless protocol.
[Ninth mode]
(Refer to the above method for controlling the processing apparatus according to the second aspect)
[Tenth form]
(See the program from the third viewpoint above)
Note that the ninth to tenth modes can be expanded to the second to eighth modes as in the first mode.

It should be noted that the disclosures of the above patent documents are incorporated herein by reference. Modifications and adjustments of the exemplary embodiments and examples are possible within the scope of the overall disclosure (including the claims) of the present invention and based on the basic technical concept thereof. Further, within the framework of the disclosure of the present invention, various combinations of various disclosed elements (including each element of each claim, each element of each embodiment or example, each element of each drawing, etc.), or selection (part) (Including targeted deletion) is possible. That is, it goes without saying that the present invention includes various variations and modifications that can be made by those skilled in the art according to the entire disclosure including the claims and the technical idea. In particular, with regard to the numerical range described in this specification, any numerical value or small range included in the range should be construed as being specifically described even if not otherwise specified.

1, 100 Control device 11 Queue management unit 12, 120 Verification processing unit 13, 130 Control processing unit 14B, 14C queue 2A, 2B, 200, 200A to 200E Processing device 110 Processing request unit 140A to 140C Processing queue 150 Reception queue 160 Verification Data storage unit 121, 131, 131A, 131B Processing thread 9000 Computer 9010 CPU
9020 Communication interface 9030 Memory 9040 Auxiliary storage device

Claims (10)

A control processing unit that processes control requests of a plurality of processing devices using queues with different priorities set;
A verification processing unit that transmits a verification packet to the plurality of processing devices,
A control request of a processing device whose response time to the verification packet is equal to or less than a predetermined threshold is stored in a first queue having a high priority, and control requests of other processing devices are given priority over the first queue. A queue management unit that stores in a second queue that has a low frequency,
A control device including. The queue management unit stores, in a third queue, a verification request for requesting the verification processing unit to transmit the verification packet,
The control device according to claim 1, wherein the verification processing unit extracts the verification request from the third queue and starts transmission of the verification packet. The verification processing unit records, as verification data, a change in whether the time required for a response to the verification packet is equal to or less than the predetermined threshold value,
The queue management unit refers to the verification data, and when a change occurs in a state of whether the time required for the processing device to respond to the verification packet is equal to or less than the predetermined threshold value, Moving the control request from one queue to the second queue, or moving the control request from the second queue to the first queue,
The control device according to claim 1 or 2. The control device according to any one of claims 1 to 3, wherein an upper limit is set for the number of simultaneous processings of the control request extracted from the second queue in the control processing unit. The queue management unit moves the control request from the first queue to the second queue or moves the second queue to the first queue according to a result of processing of the control request. Of the control request of
The control device according to claim 1. 6. The control device according to claim 1, wherein the queue management unit suppresses registration of a control request of a processing device that does not respond to the verification packet to the second queue. If the time required for the processing device to respond to the verification packet exceeds the predetermined threshold value and is within a predetermined range, the queue management unit sends a control request for the processing device to the second queue. The control device according to any one of claims 1 to 6, which stores 8. The control device according to claim 1, wherein the verification processing unit transmits the verification packet to the processing device using a connectionless protocol. A control device including a control processing unit that processes control requests of a plurality of processing devices by using queues with different priorities set,
A verification packet is transmitted to the plurality of processing devices,
The control request of the processing device whose time required for the response to the verification packet is less than or equal to a predetermined threshold is stored in the first queue with high priority,
A control request of a processing device whose response time to the verification packet exceeds a predetermined threshold is stored in a second queue having a lower priority than the first queue.
A method for controlling a processing device. In a computer mounted on a control device having a control processing unit that processes control requests of a plurality of processing devices using queues with different priorities set,
A process of transmitting a verification packet to the plurality of processing devices;
A process of storing a control request of a processing device whose time required for a response to the verification packet is equal to or less than a predetermined threshold value in a first queue having a high priority;
A process of storing a control request of a processing device in which a time required for a response to the verification packet exceeds a predetermined threshold value in a second queue having a lower priority than the first queue;
The program to run.

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