WO2013132540A1 - 情報処理システム - Google Patents
情報処理システム Download PDFInfo
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- WO2013132540A1 WO2013132540A1 PCT/JP2012/001621 JP2012001621W WO2013132540A1 WO 2013132540 A1 WO2013132540 A1 WO 2013132540A1 JP 2012001621 W JP2012001621 W JP 2012001621W WO 2013132540 A1 WO2013132540 A1 WO 2013132540A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/12—Arrangements for remote connection or disconnection of substations or of equipment thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
- H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave where the power saving management affects multiple terminals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to an information processing system, and more particularly to improvement of data transfer efficiency and power saving in data transfer of a multi-hop network.
- Patent Document 1 There is a technique disclosed in Patent Document 1 as a power saving technique in data transfer in a multi-hop network.
- each terminal receives data by transitioning from a sleep state to an activation state by receiving an activation signal addressed to each terminal, and analyzes a destination of data included in the received data. As a result of the analysis, if the data is addressed to another terminal, an activation signal directed to the next terminal is transmitted.
- the information processing system of the present invention is an information processing system including a plurality of information processing devices connected by a multi-hop network, and each information processing device transmits and receives a first packet including information on a destination address.
- a communication unit, and a second communication unit that performs communication at a higher frequency than the first communication unit and transmits and receives a second packet including a payload.
- Each information processing device includes: a first communication unit that transmits a first packet; When received, the above-described problem is solved by activating the second communication unit.
- the present invention it is possible to suppress a decrease in data transfer capability due to waiting for activation of the second communication unit while reducing power consumption in the second communication unit.
- FIG. 1 It is a figure which shows the structure of the processing node in the Example of this invention, and the connection between processing nodes. It is a figure which shows an example of the multihop network of this invention. It is a figure which shows the detail of the processing node of the Example of this invention. It is a figure which shows the detail of the example of a data communication part. It is a figure which shows the example of a power management packet transfer log
- FIG. 1 shows a processing node 100 and a processing node 101 as information processing apparatuses included in an embodiment of the information processing system of the present invention.
- FIG. 1 is a block diagram showing the internal configuration of the processing node 100 and the processing node 101.
- the processing node 100 includes a data processing unit 110 that performs various operations and controls, a data communication unit 120 that generates a data packet 300 including a payload to be transmitted to another processing node, and communicates the data packet 300 with the other processing node.
- a power management unit 130 that performs power control of the data communication unit 120; a power management communication unit 140 that generates a power management packet 400 that is paired with the data packet 300; and that communicates the power management packet 400 with other processing nodes; Is provided.
- the processing node 101 and other processing nodes (not shown) connected to the processing node 100 have the same specifications as the processing node 100.
- FIG. 7 is a schematic diagram showing the configuration contents of the data packet 300 of this embodiment.
- the data packet 300 includes, as information, an identifier 301 indicating data transfer contents such as a signal start and a transfer size, a destination address 302 indicating a final transfer destination processing node, and a payload 303 which is actual data.
- FIG. 8 is a schematic diagram showing the configuration content of the power management packet 400.
- the power management packet 400 includes an identifier 401 indicating power management request contents such as a signal start and data communication unit 120 activation, or a signal start and data communication unit 120 stop, and a destination indicating a final transfer destination processing node. Address 402 as information.
- the data communication unit 120 of the processing node 100 and the data communication unit 120 of the processing node 101 are connected by a transmission path. Further, the power management communication unit 140 of the processing node 100 and the power management communication unit 140 of the processing node 101 are connected by a transmission path. Other processing nodes connected to the processing node 100 are also connected in the same manner as the processing node 101. In this embodiment, communication between the data communication units 120 between the processing nodes is performed by high-speed serial communication in order to exchange data at high speed. For example, the data communication unit 120 can perform communication at a gigahertz frequency.
- the power management communication units 140 communicate with each other at a lower speed than the communication between the data communication units 120, for example, at a frequency in the megahertz band. Therefore, when the data communication unit 120 is activated, the data communication unit 120 consumes more power than the power management communication unit 140 due to the difference in the frequency of the clock used for packet transmission / reception. From this power consumption relationship, the power consumption of the information processing system can be suppressed by stopping or stopping the operation of the data communication unit 120 related to high-speed communication, for example, by stopping the clock supply. Furthermore, prior to the transfer of the data packet 300, the data communication unit 120 necessary for the transfer of the data packet 300 can be activated via the connection between the power management communication units 140.
- FIG. 2 shows an information processing system 2000 according to the present embodiment.
- the information processing system 2000 has a multi-hop network configuration in which a plurality of information processing apparatuses are connected. Circles in the figure indicate processing nodes, and lines indicate connections between the processing nodes.
- FIG. 2 illustrates the positions of the processing nodes [1, 0, 0].
- the information processing system 2000 is a three-dimensional torus network, but the present invention is not limited to this configuration, and can be applied to various multi-hop networks such as meshes and rings.
- FIG. 3 is a block diagram showing the internal configuration of the processing node 100 in detail.
- the data processing unit 110 includes a central processing unit (CPU) 111 and a memory 112.
- the CPU 111 performs various calculations and control of the processing node 100.
- the memory 112 is used as a storage destination for intermediate results and final results of arithmetic processing by the CPU 111 and as a storage destination for transmission / reception data.
- the data communication unit 120 includes a data transfer control unit 121, a data transmission unit 122, and a data reception unit 123. Further, in order to save power, the data communication unit 120 has a function of transitioning all or a part thereof to a low power state in accordance with an instruction from the data communication power control unit 132, that is, all or part of the function is suspended or Has the ability to stop.
- the low power state is a state in which the clock and power supply are stopped and data cannot be transmitted / received, but the power consumption is low.
- the normal state can transmit / receive data, but the power consumption is higher than that in the low power state. State.
- the transition from the low power state to the normal state is performed in accordance with an instruction from the data communication power control unit 132.
- the transition from the low power state to the normal state and the transition from the normal state to the low power state for example, depending on the degree of power reduction such as whether it is inactive or stopped, for example, clock data recovery (CDR)
- CDR clock data recovery
- the data communication unit 120 can transition all of the data communication unit 120 to the low power state when there is no data communication, and even when there is data communication, transmission that is not used for the data communication.
- Each of the port 125 and the reception port 127 can be set to a low power state.
- the clock supply and power supply at each port are stopped to stop each port, and each port is brought into a low power state.
- the data communication unit 120 has a timer for each port, and the data communication unit 120 receives a latest activation request to each port of the transmission port 125 and the reception port 127 for a certain period, for example, 1 second.
- the data communication power control unit 132 When there is no data communication at the port that has received the activation request, the data communication power control unit 132 is requested to stop the corresponding part. As a result, a necessary part of the data communication unit 120 can be activated for a time sufficient for the transfer of the data packet 300, and the data communication unit 120 can actively start a stop command without externally issuing a stop command. The unnecessary power consumption can be suppressed.
- the data communication unit 120 further requests the data communication power control unit 132 to stop the transmission unit 122 when all the ports in the transmission port 125 are in the low power state. Similarly, the data communication unit 120 requests the data communication power control unit 132 to stop the reception unit 123 when all the ports in the reception port 127 are in the low power state. Further, when all of the ports in the transmission port 125 and the reception port 127 are in a low power state, the data communication unit 120 includes the data communication unit 120 including the data transfer control unit 121 to the data communication power control unit 132. Make a stop request.
- the data transfer control unit 121 generates a data packet 300 in response to a data transfer instruction from the CPU 111, and transmits the generated data packet 300 to the data transmission unit 122.
- the data transfer control unit 121 extracts the destination address 302 included in the data packet 300 received from the other processing node by the data reception unit 123 and stores it in the extracted destination address 302 and the memory 134 of the power management unit 130 described later.
- the address is determined by comparing with the address of the self-processing node. If the destination address 302 matches the address of the self-processing node as a result of the determination, the data transfer control unit 121 reads data from the memory 112 or payload 303 to the memory 112 according to the decoding result of the identifier 301. Write. If the destination address 302 does not match the address of its own processing node, the data transfer control unit 121 transmits the data packet 300 to the data transmission unit 122.
- FIG. 4 is a block diagram of the data communication unit 120 showing the data transmission unit 122 and the data reception unit 123 in detail.
- the data transmission unit 122 includes a transfer destination selection unit 124 and a transmission port 125 that is a communication port.
- the transfer destination selection unit 124 selects a processing node among the processing nodes connected to the processing node 100 to which the data packet 300 transmitted from the data transfer control unit 121 is to be transferred.
- the data packet 300 is transmitted to the selected processing node.
- Each port of the transmission port 125 includes a high-speed serial transmission transceiver capable of communicating at a gigahertz frequency. Therefore, the power consumption of each port of the transmission port 125 is large because the supplied clock is high.
- Each port of the transmission port 125 is connected to a reception port 127 of another connected processing node.
- the transfer destination selection unit 124 selects the transmission destination of the data packet 300 using the power management packet transfer history table 200 shown in FIG. 5, the routing table 1200 shown in FIG. 12, and the table 1100 shown in FIG.
- the power management packet transfer history table 200 is stored in the memory 134 of the power management unit 130, and the power management packet 400 is transferred toward the processing node indicated by the destination address 402.
- it is a table that stores which port of the transmission port 145 of the own processing node is used as entry information.
- which port of the transmission port 145 of the own processing node is used depends on which processing node of other processing nodes connected to the own processing node is transferred. Correspond.
- the routing table 1200 is stored in the memory 134 of the power management unit 130.
- the routing table 1200 is the next. It is a table which shows the transfer destination address.
- the routing table 1200 of FIG. 12 transfers the address so that the addresses are brought closer to the destination addresses 302 and 402 in the order of z if x and y do not match if y and z do not match.
- it is created based on the policy for selecting the destination address, it can be recreated by dynamically changing the policy according to the network congestion status due to the transfer of the data packet 300 and the power management packet 400.
- the policy is changed so that the addresses are brought closer to the destination addresses 302 and 402 in the order of y, z, x and in the order of z, y, x.
- the table 1100 is stored in the memory 134 of the power management unit 130, and is a table indicating the relationship between the port numbers of the transmission port 125, the reception port 127, the transmission port 145, and the reception port 147 and the connection destination processing node. In the table 1100 of FIG. 11, the port numbers of the respective ports are matched.
- the transfer destination selection unit 124 first determines whether the destination address 302 of the data packet 300 transmitted from the data transfer control unit 121 matches the destination address of the entry in the power management packet transfer history table 200. If there is a matching address as a result of the determination, the transfer destination selection unit 124 transfers the data packet 300 via the port corresponding to the port indicated by the entry determined to be matched among the ports of the transmission port 125. . As will be described later, since the communication path including the port corresponding to the destination address of the entry in the power management packet transfer history table 200 has been activated, the data packet 300 can be transmitted without waiting for the transition from the low power state to the normal state. Transfer is performed. In addition, since the port is activated as necessary, the power consumption of the information processing system 2000 can be suppressed.
- the transfer destination selection unit 124 selects a transfer destination with reference to the routing table 1200 and needs to be activated for transfer to the transfer destination selected with reference to the table 1100.
- the port information of the correct transmission port 125 is obtained, and the port activation request and the destination address 302 necessary for the data communication power control unit 132 of the power management unit 130 are transmitted.
- the transfer selection unit 124 receives the activation completion, and re-executes the coincidence determination between the destination address 302 and the destination address in the power management packet transfer history table 200.
- the data reception unit 123 includes an arbitration unit 126 and a reception port 127 that is a communication port.
- Each port of the reception port 127 includes a high-speed serial transmission receiver that can communicate at a frequency in the gigahertz band. Therefore, the power consumption of each port of the reception port 127 is large because the supplied clock is high.
- the data reception unit 123 receives the data packet 300 transmitted from another processing node at the reception port 127, and the arbitration unit 126 performs arbitration of the data packet 300 transferred from each port of the reception port 127 to perform data transfer control.
- the received data packet 300 is transmitted to the unit 121.
- Each port of the reception port 127 is connected to a transmission port 125 of another processing node connected to the processing node 100.
- the power management unit 130 includes a data communication state observation unit 131, a data communication power control unit 132, a power management packet history control unit 133, and a memory 134. Hereinafter, each part will be described.
- the data communication state observation unit 131 acquires information on the operation state of the data communication unit 120 by communicating with each unit of the data communication unit 120, and includes the entire data communication unit 120, the entire data transmission unit 122, and data reception. Information on whether the entire unit 123, each port of the transmission port 125, and each port of the reception port 127 is in the low power state or the normal state can be acquired.
- the data communication power control unit 132 receives requests from the CPU 111, the data communication unit 120, a power management packet transmission unit 142, which will be described later, and the power management packet reception unit 143, and the entire data communication unit 120 and the entire data transmission unit 122. In addition, the operation state of the low-power state or the normal state is changed for the entire data receiving unit 123, each port of the transmission port 125, and each port of the reception port 127, and power management packet history control is performed. An instruction to update the power management packet transfer history table 200 is sent to the unit 133.
- the data communication power control unit 132 sets the data transmission unit 122 of the data transmission unit 122 if the entire data transmission unit 122 or the data transfer control unit 121 is also in the low power state. Necessary portions and the data transfer control unit 121 are also changed to the normal state. In addition, when changing each port of the reception port 127 to the normal state, the data communication power control unit 132 has the data reception unit 123 of the data reception unit 123 if the entire data reception unit 123 and the data transfer control unit 121 are also in the low power state. Necessary portions and the data transfer control unit 121 are also changed to the normal state. Further, when receiving a data transmission request from the CPU 111, the data communication power control unit 132 requests the power management packet control unit 141 to generate the power management packet 400.
- the power management packet history control unit 133 updates the power management packet transfer history table 200 based on an instruction from the data communication power control unit 132.
- the power management packet transfer history table 200 uses any of the transmission ports 145 of its own processing node when the power management packet 400 is transferred to the processing node indicated by the destination address 402. That is, it is a table having, as entry information, which processing node among other processing nodes connected to its own processing node has been transferred.
- the power management packet transfer history table 200 is registered in or deleted from an entry based on the identifier 401 of the power management packet 400, the destination address 402, and the port number information of the transmission port 145 used for transfer.
- the power management packet history control unit 133 registers a new entry in the power management packet transfer history table 200 as a new entry if there is no address that matches the destination address 402 in the power management packet transfer history table 200. If there is a matching address, the entry having the matching address is overwritten and updated. If the identifier 401 is a stop request, an entry having an address that matches the destination address 402 is deleted.
- the memory 134 stores address information of its own processing node, a power management packet transfer history table 200, a table 1100, and a routing table 1200.
- the power management communication unit 140 includes a power management packet control unit 141, a power management packet transmission unit 142, and a power management packet reception unit 143.
- the power management packet control unit 141 generates a power management packet 400 according to an instruction from the data communication power control unit 132 and transfers the generated power management packet 400 to the power management packet transmission unit 142.
- the power management packet control unit 141 extracts the destination address 402 included in the power management packet 400 received from the power management packet receiving unit 143 and stores the extracted address 402 and the memory 134 of the power management unit 130. The address is determined by comparing with the address of its own processing node.
- the power management packet 400 is not transmitted to the power management packet transmitter 142. If the destination address 402 does not match, the power is transmitted to the power management packet transmitter 142. A management packet 400 is transmitted.
- FIG. 6 is a block diagram of the power management communication unit 140 showing the power management packet transmission unit 142 and the power management packet reception unit 143 in detail.
- the power management packet transmission unit 142 includes a transfer destination selection unit 144 and a transmission port 145.
- Each port of the transmission port 145 is connected to a reception port 147 of another processing node connected to the processing node 100.
- the connection relationship between each port of the transmission port 145 and each port of the reception port 147 is stored in the memory 134 as a table 1100.
- the transfer destination selection unit 144 refers to the routing table 1200 for the power management packet 400 transmitted from the power management packet control unit 141, and determines which processing node is connected to the processing node 100. Whether to transfer the management packet 400 is selected, and the power management packet 400 is transmitted via the transmission port 145 with reference to the table 1100. Also, the transfer destination selection unit 144 decodes the identifier 401 of the power management packet 400, and when the decoding result is an activation request, the transfer destination selection unit 144 refers to the table 1100 and transfers the power management packet 400 in the transmission port 145.
- the activation request for the port in the transmission port 125 corresponding to the port used for the transmission is combined with the information on the destination address 402 and the information on the port number used for the transfer of the power management packet 400 in the transmission port 145. Transmit to the communication power control unit 132.
- the transfer destination selecting unit 144 refers to the table 1100 and sets the transmission port 125 corresponding to the port used for transferring the power management packet 400 within the transmission port 145.
- the port stop request is transmitted to the data communication power control unit 132 together with information on the destination address 402 and information on the port number used for transferring the power management packet 400 in the transmission port 145.
- the data transmission / reception is set as one set, and the start request or the stop request for the port of the reception port 127 corresponding to the port of the transmission port 125 for which the start request or the stop request is made is also performed.
- the activation or deactivation of the data transmission unit 122 and the data reception unit 123 can be controlled independently.
- the power management packet reception unit 143 includes an arbitration unit 146 and a reception port 147. Each port of the reception port 147 is connected to a transmission port 145 of another processing node connected to the processing node 100. The connection relationship between each port of the reception port 147 and each port of the transmission port 145 is stored in the memory 134 as a table 1100.
- the power management packet receiving unit 143 receives the power management packet 400 transmitted from another processing node at the reception port 147, and the arbitration unit 146 performs arbitration of the power management packet 400 transferred from each port and decodes the identifier 401. At the same time, the power management packet 400 is transmitted to the power management packet controller 141.
- the power management packet receiving unit 143 refers to the table 1100, and receives a request from the reception ports 127 corresponding to the ports of the reception ports 147 used for reception. A port activation request is transmitted to the data communication power control unit 132.
- the power management packet receiving unit 143 refers to the table 1100, and receives a request from the reception ports 127 corresponding to the port of the reception ports 147 used for reception. A port stop request is transmitted to the data communication power control unit 132.
- the data transmission / reception is set as one set, and the start request or stop request for the port of the transmission port 125 corresponding to the port of the reception port 127 for which the start request or stop request is made is also performed.
- the activation or deactivation of the data transmission unit 122 and the data reception unit 123 can be controlled independently.
- the transfer shown in FIG. 9 for transferring data from the processing node 100 to the processing node 103 via the processing node 101 and the processing node 102 is taken as an example, and the sequence diagram shown in FIG. The operation will be described with reference to FIG.
- the processing node 100 is at address [3, 6, 5]
- the processing node 101 is at address [4, 6, 5]
- the processing node 102 is at address [4, 5, 5]
- the processing node 103 is at address [4]. 4, 4, 5].
- It is assumed that the data communication unit 120 of each processing node is in the low power state as a whole in the initial state.
- step 100 in transferring data to the processing node 103 in the processing node 100, the CPU 111 of the processing node 100 requests the data communication power control unit 132 to transmit data with the final destination as the processing node 103. Further, the CPU 111 requests the data communication state observation unit 131 for information on the state of the data communication unit 120. Upon receiving the request, the data communication state observation unit 131 checks the state of the data communication unit 120 and notifies the CPU 111 that the entire data communication unit 120 is in the low power state. Upon receiving the notification, the CPU 111 waits for a startup completion notification from the data communication power control unit 132.
- step S101 based on the request from the CPU 111, the data communication power control unit 132 instructs the power management packet control unit 141 to generate the power management packet 400 whose identifier 401 whose destination is the processing node 103 is the activation request.
- the power management packet 400 generated by the power management packet control unit 141 is transmitted to the power management packet transmission unit 142 and is transferred to the processing node 101 as a result of selection of the relay destination by the transfer destination selection unit 144. Further, the transfer destination selection unit 144 decodes the identifier 401 of the power management packet 400, and since the decoding result is an activation request, the transmission corresponding to the port used for transfer in the transmission port 145 is referred to the table 1100.
- the activation request for the port number 1 of the port 125 is transmitted to the data communication power control unit 132.
- step S102 based on the activation request from the transfer destination selection unit 144, the data communication power control unit 132 of the processing node 100 sets the port number 1 of the data transfer control unit 121, the transfer destination selection unit 124, and the transmission port 125. Start of the port of port number 1 of the reception port 127 corresponding to the activation target port of the transmission port 125, the arbitration unit 126, and the transmission port 125.
- a destination address indicating the processing node 103 and “1” which is the port number of the port connected to the processing node 101 among the transmission ports 145 are registered in the entry of the power management packet transfer history table 200.
- step S103 the processing node 101 receives the power management packet 400 transmitted from the processing node 100, and the power management packet control unit 141 determines whether the destination address 402 matches the address of the own processing node. Since the determination results do not match, the power management packet 400 is transmitted to the power management packet transmitter 142. In the transfer destination selection unit 144, the processing node 102 is selected as the transfer destination, and the power management packet 400 is transferred to the processing node 102.
- step S104 the result of selecting the processing node 102 in S103 is notified to the data communication power control unit 132, so that the data transfer control unit 121, the transfer destination selection unit 124, and the power management packet 400 are used for transmission.
- the processing node 101 starts the transmission port 125 corresponding to the transmission port 145, the arbitration unit 126, and the reception port 127 corresponding to the activation target port of the transmission port 125. Further, the destination address indicating the processing node 103 and the port number of the port connected to the processing node 102 among the transmission ports 145 are registered in the entry of the power management packet transfer history table 200.
- the arbitration unit 146 decodes the identifier 401 of the power management packet 400 and confirms that it is an activation request.
- the data communication power control unit 132 is notified of the activation request, it corresponds to the reception port 127 corresponding to the reception port 147 used for receiving the power management packet 400 and the activation target port of the reception port 127. Activation of the transmission port 125 is started.
- step S105 the processing node 102 receives the power management packet 400 transmitted from the processing node 101, and the power management packet control unit 141 determines whether the destination address 402 matches the address of its own processing node. Since the determination result is addressed to another processing node, the power management packet 400 is transmitted to the power management packet transmission unit 142. In the transfer destination selection unit 144, the processing node 103 is selected as the transfer destination, and the power management packet 400 is transferred to the processing node 103.
- step S106 the data communication power control unit 132 is notified of the result of S105, whereby the data transfer control unit 121, the transfer destination selection unit 124, and the transmission port 145 used for transmission of the power management packet 400 are transmitted.
- the processing node 102 starts activation of the corresponding transmission port 125, the arbitration unit 126, and the reception port 127 corresponding to the activation target port of the transmission port 125.
- the destination address indicating the processing node 103 and the port number of the port connected to the processing node 103 among the transmission ports 145 are registered in the entry of the power management packet transfer history table 200.
- the arbitration unit 146 decodes the identifier 401 of the power management packet 400 and confirms that it is an activation request.
- the data communication power control unit 132 is notified of the activation request, it corresponds to the reception port 127 corresponding to the reception port 147 used for receiving the power management packet 400 and the activation target port of the reception port 127. Activation of the transmission port 125 is started.
- step S107 the processing node 103 receives the power management packet 400 transmitted from the processing node 102, and the power management packet control unit 141 determines whether the destination address 402 and the address of the own processing node match. Since the determination results match, that is, the power management packet 400 is addressed to the own processing node, the power management packet 400 is not transferred to other processing nodes. Further, the arbitration unit 146 decodes the identifier 401 of the power management packet 400 and confirms that the request is an activation request. When the data communication power control unit 132 is notified of the activation request, it corresponds to the reception port 127 corresponding to the reception port 147 used for receiving the power management packet 400 and the activation target port of the reception port 127. Activation of the transmission port 125 is started.
- each processing node notifies the transmission source processing node of the power management packet 400 that activation of the transmission / reception unit of the data communication unit 120 is completed and data communication is possible.
- step S111 the CPU 111 of the processing node 100 receives the activation completion notification from the data transfer control unit 121, and requests the data transfer control unit 121 to transfer data destined for the processing node 103. If it has already been started in step S100, a request is made in step S100.
- step S112 the data transfer control unit 121 generates a data packet 300, and the generated data packet 300 is transmitted to the transfer destination selection unit 124.
- the transfer destination selection unit 124 selects the processing node 101 as the transfer destination because the entry registered in step S102 matches as a result of the matching determination between the destination address 302 and the entry of the power management packet transfer history table 200.
- a data packet 300 is transmitted to the node 101.
- step S113 the processing node 101 receives the data packet 300 transmitted from the processing node 100, and the data transfer control unit 121 determines whether the destination address 302 matches the address of the own processing node. Since the determination result is a mismatch, that is, a packet addressed to another processing node, the data packet 300 is transmitted to the data transmission unit 122.
- the transfer destination selection unit 124 selects the processing node 102 as the transfer destination because the entry registered in step S104 matches as a result of the match determination between the destination address 302 and the power management packet transfer history table 200, and sends data to the processing node 102. Packet 300 is forwarded.
- step S114 when the reception of the data packet 300 in step S113 is completed, the transfer acceptance is notified to the processing node 100.
- step S115 the processing node 102 receives the data packet 300 transmitted from the processing node 101, and the data transfer control unit 121 determines whether the destination address 302 matches the address of its own processing node. Since the determination result is a mismatch, that is, a packet addressed to another processing node, the data packet 300 is transmitted to the data transmission unit 122.
- the transfer destination selection unit 124 selects the processing node 103 as the transfer destination because the entry registered in step S106 matches as a result of the match determination between the destination address 302 and the power management packet transfer history table 200, and sends data to the processing node 103. Packet 300 is forwarded.
- step S116 when the reception of the data packet 300 in step S115 is completed, the transfer acceptance is notified to the processing node 101.
- step S117 the processing node 103 receives the data packet 300 transmitted from the processing node 102, and the data transfer control unit 121 determines whether the destination address 302 matches the address of its own processing node. Since the determination result is a match, that is, a packet addressed to the own processing node, the identifier 301 is decoded and the payload 303 is transferred to the memory 112.
- step S118 when the reception of the data packet 300 in step S117 is completed, the transfer acceptance is notified to the processing node 102.
- each processing node can control activation / deactivation of the data communication unit 120 by transmitting / receiving the power management packet 400. For this reason, all or part of the data communication unit 120 can be shifted to the low power state except where it is activated. Therefore, power saving of each processing node can be achieved.
- the power management packet 400 can be transmitted to the destination processing node without waiting for the data communication unit 120 to start, and the data communication unit 120 of each processing node can be started in parallel.
- the low power state is changed to the normal state. It is possible to reduce the waiting time for data transfer caused by the transition of. Therefore, it is possible to suppress a decrease in data transfer performance due to use of the low power state.
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Abstract
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Claims (9)
- マルチホップネットワークで接続されている複数の情報処理装置を含む情報処理システムであって、
各情報処理装置は、
宛先アドレスの情報を含む第1パケットを送受信する第1通信部と、
前記第1通信部よりも高い周波数で通信を行い、前記宛先アドレスへのペイロードを含む第2パケットを送受信する第2通信部と、を備え、
各情報処理装置は、
前記第1通信部が前記第1パケットを受信した場合に、前記第2通信部を起動させることを特徴とする情報処理システム。 - 請求項1に記載の情報処理システムにおいて、
各情報処理装置は、
メモリを有し、
前記メモリに前記第1パケットの転送先の情報を格納し、
前記転送先の情報に基づいて前記第2パケットを転送することを特徴とする情報処理システム。 - 請求項2に記載の情報処理システムにおいて、
各情報処理装置の前記メモリには、さらに、ルーティングテーブルと各情報処理装置のアドレスの情報とが格納され、
各情報処理装置は、前記宛先アドレスと前記各情報処理装置のアドレスの一致判定を行い、判定結果が不一致の場合には、前記ルーティングテーブルに基づいて前記第1パケットを転送することを特徴とする情報処理システム。 - 請求項2に記載の情報処理システムにおいて、
前記第2通信部は、前記複数の情報処理装置の内の接続先の情報処理装置毎に通信ポートを有し、前記転送先の情報と対応させて各通信ポートの起動と、休止または停止とを行うことを特徴とする情報処理システム。 - 請求項4に記載の情報処理システムにおいて、
前記第2通信部の各通信ポートは、前記第1通信部が前記第1パケットを受信した場合の起動後所定の時間の経過の後に、休止または停止することを特徴とする情報処理システム。 - 請求項1に記載の情報処理システムにおいて、
前記第1パケットを伝送する第1伝送路と、
前記第2パケットを伝送する第2伝送路と、を備えることを特徴とする情報処理システム。 - 請求項1に記載の情報処理システムにおいて、
前記マルチホップネットワークは、3次元トーラスネットワークであることを特徴とする情報処理システム。 - 請求項1に記載の情報処理システムにおいて、
前記第2通信部は、高速シリアル伝送によって通信を行うことを特徴とする情報処理システム。 - 請求項1に記載の情報処理システムにおいて、
前記第1通信部はメガヘルツ帯で通信を行い、
前記第2通信部はギガヘルツ帯で通信を行うことを特徴とする情報処理システム。
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