JPH0895927A - Large scale mutual connection switch - Google Patents

Abstract

PURPOSE: To provide a high-speed and large-scale mutual connection switch with a small amount by reducing the number of signal lines to be connected to respective parts consisting of the switch. CONSTITUTION: A large scale mutual connection switch 101 is provided with a signal line for connecting a communication control part 102 and a switch arbiter 103 while dividing all the communication control parts into groups with in multiple-to-one correspondence with wide bit width for every group and a signal line for connecting the communication control part and a bit slice switch 104 while dividing the input/output of the communication control parts into bits to connect them to respective bit slice switches in one-to-one correspondence. Thus, when these signal lines are provided, the communication and high- speed communication between the communication control part 102 which can not be bit-divided but comparatively only intermittently performs communication, and the switch arbiter 103 and between the communication control part 102, which continuously performs communication but can be bit-divided, and the bit slice switch 104 can be performed and the number of all the signal lines connected to the respective parts can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large scale interconnection switch for connecting a large number of information processing devices to each other.

[0002]

2. Description of the Related Art An interconnection switch is a device for interconnecting information processing devices to transfer data, and there are various types such as a crossbar switch and a multistage switch. When the number of connected devices exceeds a certain limit, the number of signal lines connected to the interconnected switch becomes too large and the circuit scale becomes too large. Is usually configured. There is a bit slice crossbar system as one of such configurations.

The bit slice method divides the transfer data width by a plurality of switch parts to transfer the data, and by using Y switch parts having a W bit width in combination, a W × Y bit mutual switch is used. A connection switch can be configured.

Further, as a method for setting switches for all switch parts, an arbiter is used as a separate part, and the arbiter arbitrates switch setting requests from all information processing devices and the switch settings for all switch parts are made from the arbiter. There is.

However, in this method, when the number of connecting devices exceeds a certain limit, the number of signal lines connected to the arbiter becomes too large, so that only the arbiter becomes a large-scale component, or the connection to the arbiter is a bus. When connecting, there was a problem that the performance dropped extremely because of the large number of connected devices.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art of the prior art by reducing the number of signal lines connecting a high-speed and large-scale interconnection switch to each part constituting the switch, It is to realize with a small quantity.

[0007]

[MEANS FOR SOLVING THE PROBLEMS] A large-scale interconnection switch divides all communication control units into groups between a communication control unit and a switch arbiter, and each group has a wide bit-width many-to-one correspondence.
A signal line for connection and a signal line for dividing the input / output of the communication control unit into bits and connecting each bit slice switch in a one-to-one manner are provided between the communication control unit and the bit slice switch.

[0008]

[Operation] A large-scale interconnection switch divides all communication control units into groups between the communication control unit and the switch arbiter,
For each group, the input / output of the communication control unit is bit-divided between the signal line that connects many-to-one with a wide bit width for each group, and between the communication control unit and the bit slice switch.
By providing a signal line for one-to-one connection, communication between the communication control unit and the switch arbiter that cannot perform bit division but relatively intermittent communication, and communication control unit and bit that continuously communicate but can perform bit division High-speed communication is possible for both slice switches, and the number of signal lines connected to each part is small.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows an overall view of the system. The system includes a plurality of information processing devices 100 and a switch 101 that transfers data between the information processing devices. The switch 101 is provided for each information processing apparatus 100 to control communication, a switch arbiter 103 that arbitrates switch setting requests from a plurality of communication control units 102 to perform switch setting control, and a switch arbiter 103.
The bit slice switch 104 for dividing data into bits and transferring the data from the transmission data line 112 set by the above to the reception data line 113. In this embodiment, the number of information processing devices 100 connected to the switch 101 is 32, and the switch 101 includes 32 communication control units 102. Also, the switch 101 is a switch setting request line 120.
And eight switch setting completion notification lines 121, each of which is connected to four communication control units 102.

FIG. 4 shows the format of the switch setting request line 120 and the switch setting completion notification line 121. Switch setting request line 120 and switch setting completion notification line 121
Consists of a 2-bit length address field 400 and a command field 401, and identifies the four communication control units 102 connected by the address field 400.

During data transfer, when the communication control unit 102 receives transfer data from the information processing apparatus 100 via the transmission line 110, it transmits a switch setting request to the switch arbiter 103 via the switch setting request line 120. The switch arbiter 103 arbitrates the switch setting request from all the switch setting request lines 120, then sets the bit slice switch 104 via the switch setting line 122, and switches to the communication control unit 102 via the switch setting completion notification line 121. Notify that the setting is completed. Next, the communication control unit 102 transfers data to the communication control unit 102 on the receiving side via the transmission data line 112, the bit slice switch 104, and the reception data line 113 in order. Upon receiving the data, the communication control unit 102 on the receiving side transmits the data to the information processing apparatus 100 via the reception line 111. When the communication control unit 102 on the transmission side finishes transmitting the data, the switch arbiter 1
A switch release request is transmitted to the switch 03 via the switch setting request line 120. The switch arbiter 103 releases the bit slice switch 104 via the switch setting line 122 and notifies the communication control unit 102 of the completion of the switch release via the switch setting completion notification line 121.

FIG. 2 is a detailed diagram of the communication control unit 102. The communication control unit 102 basically includes a transmission control unit 200 that controls transmission and a reception control unit 20 that controls reception.
One of the plurality of communication control units 102 each including one and connected to one switch setting request line 120 includes a bus arbiter 202 that arbitrates the switch setting request line 120. In FIG. 2, the communication control unit 102 # 1 is the bus arbiter 20.
Equipped with 2. The switch setting request line 120 and the switch setting completion notification line 121 are connected to the transmission control unit 200, and the transmission control units 200 of the communication control units 102 # 1 to # 4.
Are all connected to the bus arbiter 202 of the communication control unit 102 # 1 by the bus request line 210 and the bus grant line 211.

Upon data transfer, when the transmission control unit 200 receives the transfer data via the transmission line 110, it first transmits a request to use the switch setting request line 120 to the bus arbiter 202 via the bus request line 210. The bus arbiter 202 arbitrates the use request of the switch setting request line 120 from the four transmission control units 200, selects one and transmits the use permission of the switch setting request line 120 via the bus grant line 211. After receiving the permission to use the switch setting request line 120, the transmission control unit 200 transmits a switch setting request to the switch arbiter 103 via the switch setting request line 120, and the switch arbiter 103 via the switch setting completion notification line 121. After receiving the switch setting completion notification, the data is transmitted via the transmission data line 112. When the transmission control unit 200 transmits a switch setting request to the switch arbiter 103 via the switch setting request line 120, the transmission control unit 200 sets its own communication control unit 1 in the address field 400.
An address indicating 02 is set and transmitted. The address field 400 has a 2-bit length and represents 0 to 3, 0 for the communication control unit 102 # 1, 1 for the communication control unit 102 # 2.
2 is specified for the communication control unit 102 # 3, and 3 is specified for the communication control unit 102 # 4. In addition, the switch setting completion notification line 121
When the switch setting completion notification is received via, the switch setting completion notification is received only when the address field 400 indicates the own communication control unit 102.

Upon receiving data via the reception data line 113, the reception control unit 201 transmits it to the information processing apparatus 100 via the reception line 111.

FIG. 3 is a detailed view of the switch arbiter 103. The switch arbiter 103 includes a switch control unit 301 that controls switching, a reception node access right management unit 302 that manages access rights for each reception node and arbitrates switch settings for the same reception node, and all switch control units 301. It includes a switch setting unit 303 that arbitrates transmission to the switch setting line 122 and an output control unit 300 that arbitrates transmission from the four switch control units 301 to the switch setting completion notification line 121. The switch control unit 301 is provided for each transmission control unit 200, and the output control unit 300 is provided for each switch setting completion notification line 121. The receiving node access right management unit 302 is connected to the all switch control unit 301 by the access right acquisition request line 310 and the access right acquisition completion notification line 311.
03 is connected to all switch control units 301 by a setting request line 312 and a setting completion notification line 313.

At the time of data transfer, the switch control unit 301 sends the address field 4 via the switch setting request line 120.
When 00 receives the switch setting request indicating the own switch control unit 301, it requests the reception node access right management unit 302 to permit access to the reception node via the access right acquisition request line 310. Receiving node access right management unit 30
Reference numeral 2 includes a memory indicating whether or not the requested receiving node is in communication, and if the receiving node is not in communication, it transmits an access permission to the requested receiving node via the access right acquisition completion notification line 311. At the same time, it is stored in the previous memory that communication is in progress. If the memory indicates that the receiving node is communicating, wait until the memory indicates that it is not communicating before transmitting the access permission. Switch control unit 301
When receiving the access permission to the receiving node, requests the switch setting unit 303 to set the bit slice switch 104 via the setting request line 312. Switch setting unit 30
3 arbitrates requests from all switch control units 301,
The bit slice switch 104 is set via the switch setting line 122, and the setting completion notification of the bit slice switch 104 is transmitted to the switch setting unit 303 via the setting completion notification line 313. Upon receiving the setting completion notification of the bit slice switch 104, the switch control unit 301 transmits the switch setting completion notification to the output control unit 300.
The output control unit 300 arbitrates the transmission requests from the four switch control units 301 that share the switch setting completion notification line 121, and then transmits the switch setting completion notification via the switch setting completion notification line 121. At this time, a value indicating the switch control unit 301 which is the transmission request source is set in the address field 400.

When the switch control section 301 receives a switch release request whose address field 400 indicates the own switch control section 301 via the switch setting request line 120, the receiving node access right management section via the access right acquisition request line 310. The end of access to the receiving node is transmitted to 302. When receiving the access end, the receiving node access right management unit 302 stores in the memory indicating whether the corresponding receiving node is communicating or not that communication is not being performed. Next, the switch control unit 301 requests the switch setting unit 303 via the setting request line 312 to release the bit slice switch 104. The switch setting unit 303 is the all switch control unit 30.
After arbitrating the request from 1, the bit slice switch 104 is released via the switch setting line 122, and a release completion notification of the bit slice switch 104 is transmitted to the switch setting unit 303 via the setting completion notification line 313.
The switch control unit 301 is the bit slice switch 104.
When the release completion notification is received, the switch release completion notification is transmitted to the output control unit 300. The output control unit 300 arbitrates the transmission requests from the four switch control units 301 sharing the switch setting completion notification line 121, and then transmits the switch release completion notification via the switch setting completion notification line 121. At this time, a value indicating the switch control unit 301 which is the transmission request source is set in the address field 400.

[0018]

The large-scale interconnection switch divides all communication control units between the communication control unit and the switch arbiter into groups, and a signal line for making a many-to-one connection with a wide bit width for each group and a communication control unit. Since the bit slice switches are provided with a signal line that divides the input and output of the communication control unit into bits and connects each bit slice switch in a one-to-one manner, the communication control unit that cannot perform bit division but relatively intermittently communicates with each other. High-speed communication is possible both for communication between switch arbiters and communication between communication control unit and bit slice switch that can perform continuous communication but bit division, and there is an effect that only a few signal lines are connected to each unit. .

[Brief description of drawings]

FIG. 1 is an overall block diagram of a system.

FIG. 2 is a detailed block diagram of a communication control unit.

FIG. 3 is a detailed block diagram of a switch arbiter.

FIG. 4 is a format diagram of a switch setting request line and a switch setting completion notification line.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical display location // H04Q 3/545 (72) Inventor Hiroshi Iwamoto 810 Shimoimaizumi, Ebina, Kanagawa Prefecture Hitachi, Ltd. Factory Office Systems Division

Claims (1)

[Claims] 1. A large-scale interconnection switch for interconnecting a large number of information processing devices to transfer data, wherein the switches control communication, the same number of communication control units as the number of information processing devices, and a plurality of communication controls. A switch arbiter that arbitrates switch setting requests from the control unit to perform switch setting control and a plurality of bit slice switches that transfer data from the transmission data line to the reception data line as set by the switch arbiter. When receiving the transfer data from the corresponding information processing device, the unit issues a switch setting request to the switch arbiter, and when the switch arbiter receives the switch setting request, the switch arbiter arbitrates with the switch setting request from another communication control unit and then transmits the bit. The slice switch group is set, and the communication control unit receives it later via the bit slice switch group. It operates so as to send data to the communication control unit, where all communication control units are divided into groups between the communication control unit and the switch arbiter, and each group communicates with a signal line for wide-bit-width, many-to-one connection. Between the control unit and the bit slice switch, there is provided a signal line for bit-dividing the input / output of the communication control unit and making a one-to-one connection to each bit slice switch. Bit division is not possible, but only relatively intermittently. High-speed communication is possible both for communication between the communication control unit and the switch arbiter that does not communicate and for communication between the communication control unit and the bit slice switch that continuously communicates but can perform bit division, and all signal lines connected to each unit are available. Large interconnect switch that requires less.