JPH0865718A - Crossbar parts for crossbar network device - Google Patents

Abstract

PURPOSE: To facilitate assembling of a assembling of a crossbar network device even at a change of the connecting device number by providing a means which serves as a selector control means and sets the number of information processors, i.e., the data switching objects to be connected and also providing a means which changes the transfer data width. CONSTITUTION: When a selector setting signal 210 is sent to a register control part 300 of a selector control part from an arbiter, the part 300 generates a set signal 312 that is decided by a connecting device number selection signal 110 and a reception device address signal 212. The part 300 sends the signal 312 to an enable register 301 and a selection register 302. At the same time, the part 300 generates a register set value signal 310 that is decided by the signal 110 and a transmission device address signal 213 and sends the signal 310 to the register 302. When the value of the signal 312 is equal to 1, the register 301 sets the value of an enable signal 214 of its output at 1 and keeps this value. Meanwhile the register 302 sets a selection signal of its output at the value of the signal 312 and keeps this value when the value of the signal 312 is equal to 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crossbar component suitable for use in a crossbar network device for exchanging data between a plurality of information processing devices.

[0002]

2. Description of the Related Art A crossbar network device selects data of a transmitting side information processing device and selects a receiving side information processing device by a crossbar component having N N: 1 selectors (N: number of connected devices) of transfer data width. Is a device for transferring to. In this network device, when the number of connected devices exceeds a certain limit, the number of signal lines connected to the crossbar parts becomes too large, or the circuit scale of the parts becomes too large. Is generally used, and one of the data transfer methods therefor is the bit slice crossbar method (for example, May 1, 1994).
Held from 8th to 20th "Parallel Processing Symposium JSPP'9
4 ", page 196).

The bit slice crossbar system divides the transfer data width by a plurality of crossbar parts to transfer data, and combines Y pieces of crossbar parts each having N N-to-1 selectors of W bit width. By using the crossbar network device, the transfer data width is W × Y bits. However, since the number of connectable information processing devices is fixed in this method,
There is a problem in that it is necessary to manufacture individual crossbar parts each time in accordance with the number of connecting devices required by the customer, which undesirably increases the time and cost.

[0004]

An object of the present invention is to solve the above problems of the prior art and to easily assemble a crossbar network device even when the number of information processing devices to be connected changes. To provide crossbar parts of various structures.

[0005]

The above object of the present invention is to set, as selector control means, a desired number of connections (hereinafter referred to as "device connection number") of an information processing apparatus as a data exchange target as control information. By adopting the means and the means for changing the transfer data width assigned to each information processing device according to the value of the number of connected devices, it is possible to effectively solve the problem. If such a selector control means is adopted, as will be described later in detail, it becomes possible to construct a crossbar network device corresponding to the number of device connections required by the customer, by using one kind of crossbar component having a standard structure. Because.

When the transmission side information processing apparatus requests a selector setting, the transfer data width to be assigned to each information processing apparatus is changed from among a plurality of selectors based on the value of the number of connected apparatuses. It can be easily realized by selecting a selector to be operated and adopting means for changing the selector from the non-operating state to the operating state. It is desirable that the transfer data width changing means returns the selector from the operating state to the non-operating state based on the value of the number of connected devices when the transmission side information processing device requests the switch release. . Further, the crossbar component of the present invention is, for example, H of one or a plurality of bit widths P.
The number of selectors (H: selection ratio) of 1 to the same number as H (H:
It can be configured by using each). In the embodiment of the present invention described below, a 2-bit width 32-to-1 selector is set to 3
It was possible to obtain favorable results in constructing a crossbar component using two pieces.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The crossbar component according to the present invention will be described in more detail with reference to FIGS. FIG. 1 shows an example of a crossbar network device configured using the crossbar component of the present invention. The information processing device 100, the arbiter 101, and the crossbar component 102 are connected to each other as shown in the drawing based on the wiring specifications designed in advance. This crossbar network device includes 16 arbiters 101 and 4 crossbar components 102, and 16 information processing devices 10 are provided.
Data of 16-bit width is divided into 4 bits and transferred between 0s.

In the four crossbar components 102, the number of connected devices selection signal 110 indicating that the number of connected information processing devices 100 is 16 and the transfer data width assigned to each information processing device is 4 bits. Is being supplied.
This signal is fixedly set based on design specifications when the crossbar network device is assembled, and will be described in detail later. The information processing device 100
Is configured so as to request the arbiter 101 to set or cancel the selector, as in the conventional case.

When the information processing device on the transmitting side [for example, the information processing device 100 (# 1)] requests the arbiter 101 to set the selector, the arbiter 101 selects the selector control signal 111.
Are fed to the four crossbar parts 102. Based on the selector control signal 111, each crossbar component changes the selector connecting the predetermined transmission data line 112 and the reception data line 113 from the non-conduction state to the conduction state. After that, the information processing apparatus 100 (# 1) divides the 16-bit width transmission data into 4-bit units, and sends them to the four crossbar components 102 via the predetermined transmission data line 112. Each crossbar component selectively transfers the 4-bit width transfer data allocated to itself to the reception data line 113 side from the transmission data line 112 side. The receiving side information processing device [for example, the information processing device 100 (# 2)] receives the transfer data of 4 bit width from each of the crossbar components 102 through the reception data line 113, and transfers them together to transfer of 16 bit width. Data. The transmitting side information processing device 100 (# 1) is the arbiter 10.
When the selector cancellation request is issued to 1, the arbiter 10
As a result of the selector control signal 111 being sent to the one to four crossbar components 102, each crossbar component causes the selector connecting the transmission data line 112 and the reception data line 113 to change from the conductive state to the non-conductive state based on the control signal. To

The internal structure of the crossbar component 102 is shown in FIG. The same components are 32 2-bit wide 32-to-1 selectors 2.
It is configured by combining 01,
Although not shown in detail, the 32 input terminals of each selector are
The nth terminals are commonly connected, and are also connected to the transmission data line 112 collectively displayed by one line. A feature of the crossbar component of the present invention is that the selector control unit 200 for controlling the selector 201 has a function for changing the transfer data width.

As in the conventional case, the selector control unit 200 is supplied with the selector control signal 111 and the connection device number selection signal 110 necessary for achieving the object of the present invention. The former selector control signal 111 includes a selector setting signal 210 that becomes “1” when there is a selector setting request, a selector release signal 211 that becomes “1” when there is a selector release request, and a receiving side. Receiving device address signal 212 for displaying the information processing device and transmitting device address signal 213 for displaying the transmitting side information processing device
Arbiter 101 for each signal.
(Fig. 1).

The internal structure of the selector control unit 200 is shown in FIG. The control unit includes 32 sets of enable registers 301 and select registers 302 for registering the operation states of the 32 selectors 201 (FIG. 2), and 32 register controls for controlling these registers. It comprises a unit 300. Each register control unit sets the set signal 3 to the corresponding enable register 301.
12 and the reset signal 311 and also supplies the set signal 312 and the register set value signal 310 to the corresponding select register 302.

When the selector setting signal 210 is sent from the arbiter 101 (FIG. 1) to the register control unit 300, the control unit 31 sets the set signal 31 determined by the connection device number selection signal 110 and the reception device address signal 212.
2 is generated and the same signal is sent to the enable register 301 and the select register 302. At the same time, the register control unit 300 generates a register setting value signal 310 determined by the connection device number selection signal 110 and the transmission device address signal 213, and sends the signal to the select register 302. The enable register 301 has a set signal 31.
When the value of 2 becomes "1", the value of the output enable signal 214 is set to "1" and the value is held. On the other hand, when the value of the set signal 312 becomes “1”, the select register 302 outputs the output of the select signal 2
The value of 15 is set as the value of the register setting value signal 312, and the value is held.

When the selector release signal 211 is sent from the arbiter 101 (FIG. 1), the register control unit 300
Generates a reset signal 311 determined by the connection device number selection signal 110 and the reception device address signal 212,
The same signal is sent to the enable register 301. The enable register 301 outputs the enable signal 2 which is its output when the value of the reset signal 311 becomes “1”.
14 is set to "0" and the value is held.

[0015]

[Table 1]

Table 1 is a truth table showing the operation of the register control unit corresponding to the number of connected devices. It should be noted that the set signal, the reset signal and the register setting value signal generated by the register control unit are slightly different for each register control unit. The symbol M is an installation number (# 1 to # 32) attached to each register control unit, and the values “0”, “1”, “2”, and “3” of the connection device number selection signal indicate that the number of connection devices is This means 32, 16, 8, and 4, respectively. To set the value of the connection device number selection signal, for example, two signal terminals A and B for inputting the connection device number selection signal are prepared in the register control unit, and the same terminal A,
This can be done by connecting B to the power supply terminal or the ground terminal, respectively. This setting is fixedly performed when assembling the crossbar network device. When the power supply potential is logical "1" and the ground potential is "0", A and B are set at the value "0" of the connection device number selection signal. Both are ground terminals, "1" is A, ground terminal is B, and "2" is power terminal.
A is the power supply terminal, B is the ground terminal, and "3" is A, B
Connect both to the power supply terminals. Here, the values “0”, “1”, “2”, and “3” of the number-of-connection-devices selection signal are transfer data widths assigned to each information processing device of 2 bits, 4 bits, 8 bits, and 16 bits, respectively. It indicates that

As can be seen from Table 1, when there is a selector setting request (when the value of the selector setting signal is "1")
Indicates that only the register control unit that satisfies the conditions shown in the table outputs the set signal and the register set value signal of a predetermined value, while the selector release request is issued (the value of the selector release signal is "1"). In the case), a reset signal having a predetermined value is output only from the register control unit that satisfies the conditions shown in the table. This means that in the case of the present embodiment in which the number of connected devices is 16, there are two register control units that set the value of the set signal or the reset signal to "1" when the selector setting request or the selector release request is made. Means that they exist in pairs.

In any case, the selector control unit 200
When the selector setting request is received (see FIG. 3), the connection device number selection signal 110 and the reception device address signal 21
On the basis of 2, the selector to be controlled is selected from the 32 selectors 201, the value of the enable signal 214 for the selector is set to "1" and output, and at the same time, the connection device number selection signal 110 and the transmission device are selected. The value calculated based on the address signal 212 is output as the select signal 215. As a result, in the case of the present embodiment, # 1 selector and # 2 selector, # 3 selector and # 4 selector,
.., two adjacent selectors are selected as a set, and at the same time, odd-numbered selectors (# 1, #
Select signal 2 of transmitter address value x 2 in 3 ...)
15, the select signal 215 of the transmitter address value × 2 + 1 is supplied to the even-numbered selectors (# 2, # 4, ...). Each of the selected selectors selects the 4-bit width transfer data sent via the transmission data line 112 connected to the transmitting-side information processing device [for example, the information processing device 100 (# 1)] to the 2-bit width. Each of them is selected and transferred to the reception data line 113 connected to the reception side information processing apparatus [for example, the information processing apparatus 100 (# 2)]. On the other hand, when the selector control unit 200 receives the selector cancellation request, the procedure is similar to that at the time of setting the selector, based on the connection device number selection signal 110 and the reception device address signal 212.
Select a predetermined selector from the individual selectors 201,
The value of the enable signal 214 for the selector is returned to "0".

Although the case where 16 information processing devices each having a transfer data width of 16 bits are connected has been described above, the crossbar component of this embodiment has the information processing device as can be seen from the truth table of Table 4. Even when 32, 8 or 4 units are connected, they can be used as they are. However, the connection of the crossbar parts to the information connection device is as shown in FIG.
It is necessary to wire in advance so that the operation based on the truth table of is possible.

[0020]

According to the crossbar component of the present invention, since the transfer data width assigned to each information processing device can be arbitrarily changed to some extent, different connection can be achieved by using one type of crossbar component having a standard structure. It is possible to easily configure the crossbar network device corresponding to the number of devices. As a result, the time and cost required to manufacture the crossbar component or the crossbar network device can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a system diagram showing an example of a crossbar network device configured by using a crossbar component of the present invention.

FIG. 2 is a system diagram showing an embodiment of a crossbar component according to the present invention.

FIG. 3 is a system diagram showing a selector control unit of the crossbar component shown in FIG.

[Explanation of symbols]

 100 ... Information processing device 101 ... Arbiter 102 ... Crossbar component 110 ... Connection device number selection signal 111 ... Selector control signal 112 ... Transmission data line 113 ... Receive data line 200 ... Selector control unit 201 ... Selector 210 ... Selector setting signal 211 ... Selector Release signal 212 ... Receiving device address signal 213 ... Transmitting device address signal 214 ... Enable signal 300 ... Register control unit 301 ... Enable register 302 ... Select register 310 ... Register setting value signal 311 ... Reset signal 312 ... Set signal

Claims (5)

[Claims] 1. A plurality of selectors having a desired selection ratio,
In the crossbar component provided with a means for controlling the selector, the selector control means is provided with a desired number of connections (hereinafter, referred to as "apparatus connection number") of the information processing apparatus to be subjected to data exchange.
Is set as control information, and means for changing the transfer data width assigned to each information processing device according to the value of the number of connected devices. Crossbar parts for network equipment. 2. The transfer data width changing means selects a selector to be controlled from a plurality of selectors based on the value of the number of connected devices when the transmitting side information processing device requests the selector setting. The crossbar component for a crossbar network apparatus according to claim 1, further comprising means for changing the selector from the non-operating state to the operating state. 3. The transfer data width changing means selects a selector to be controlled from a plurality of selectors based on the value of the number of connected devices when a request for releasing the selector is issued from the transmitting side information processing device. The crossbar component for a crossbar network device according to claim 2, further comprising means for returning the selector from the operating state to the non-operating state. 4. One of a plurality of H-to-1 selectors (H: selection ratio) having one or more bit widths P is used in the same number as H (H number). A crossbar component for a crossbar network device as described in Kaichi. 5. A crossbar component for a crossbar network device according to claim 4, wherein 32 32-to-1 selectors each having a 2-bit width are used.