JPS5887645A - Correspondence system between computers - Google Patents

Abstract

PURPOSE:To perform the correspondence between computers when a failure occurs on a linkage bus between computers, by providing a periodic timer for each computer, and using a common memory between computers as an information exchange area. CONSTITUTION:An information transmission module 14 and an information reception module 15 are provided for a computer 3 at transmission side and a computer 4 at reception side, and the modules 14, 15 are connected to an exchange area 11 in a common memory 1 between the computers. One or both the computers 3, 4 are provided with a periodic timer 5, and the exchange area in the memory 1 is provided with an M flag 111 representing the presence/absence of information. The information is written in the exchange area 11 at the module 14 to set the flag 111. Further, the module 15 is started with the interruption set in the timer 5, the flag 111 is discriminated, the information in the area 11 is read out when the flag 111 is set, the flag 111 is finally set off, allowing to make the correspondence possible between the computers 3 and 4.

Description

[Detailed Description of the Invention] (1) Field of Application of the Invention The present invention is directed to a nodding platform! ′ is composed of a calculator.
In a computer system, each computer provides information to each other. Converged on the needle Jl Iso engine communication system.

(2) In the prior art composite #F nose system, in general, given t!
II% For example, tasks such as mutual monitoring of ti computers and process control are divided into several parts, and these t'*a computers take part in the processing little by little.

In this simple computer system, each computer shares fc
When we have to exchange information with each other as we go about our business, an oxidation situation occurs.

In order for the 4 Tani i1't'J machines to exchange information with each other,
There is a need for an exchange area for information and a wear that notifies the receiver that the sending MiI 111 has written information to the exchange area.

In the conventional technique, as shown in figure J111, computers 3 and 4 are
ltt'I! Condenses the # machine threshold shared memory 1 and TL-Hana Shinma linkage path 2, transfers the information exchange area 11 to the rrs shared memory 1 yen, interrupts the inter-computer linkage bus 2, and connects these. T-bin was carrying out communications using a needle-nose machine.

That is, the sending IjIi411 calculation a13 inserts the information into the exchange area 11, and then the #nose engine linkage bus 2
, and interrupts the calculation on the receiving side*4.

Receiving side calculation fa4 receives this interrupt +.

Yu@At-Starts from Henko Elif 11.

This method is relatively simple and can be used to
It has a place where the machine's stand a can be expanded.
77, If [F occurs in the linkage path 2 between #8 flk, tie crossing is not possible.

Depending on the gatekeeper of information exchange, there is a risk that the system may go down.

Therefore, in a system requiring ultra-high reliability, t
A system has been adopted in which the linkage bus 2 between iJ aircraft is converted to 2x, but this may result in a system that is unsatisfactory in terms of system scale.

Here, prepare for failure of the total engine linkage path.

An inexpensive alternative to that interrupt mechanism is desired.

In addition, without giving away the speediness of C, which uses the interrupt machine S of the inter-machine linkage bus from the beginning, it simply uses the tiJI inter-machine shared memory and provides the in-machine threshold communication function. There are also many systems that sprinkle water.

(3) Purpose of the Invention The present invention provides a shared memory between computers and hardware that each computer is already equipped with. t, use fII, send t
i111411#tJ1: Machine 3 transferred the 1W information to the exchange area IIK in the computing institution shared memory t-Used timing/tag t, received tg information Calculator 4 by giving the occurrence name, tt 1j nose linkage bus 2! Although the performance may be inferior in case of 9, the purpose is to maintain the function of information exchange.

(4) A collection of inventions! With the composite TI system shown in Akira G2Ko, the total is 31!
- A periodic timer is set at Ai#ii. In this figure, for ease of viewing, the periodic timer 5 is shown only in the receiver 0111411iiitJ1 machine 4.

The remittance resistant nose 3 writes information to the exchange area 11 in response to the custom complication module 14.

On the other hand, the receiving 1llll hand J1 machine 4 uses the periodic timer 5 and the information exchange area 11 according to the customary receiving 7 joules 15.
Generate the timing to explore.

The interrupt of periodic timer 5 will be generated at one foot interval'!
The information receiving module 15 searches the information exchange area 11 every time the interrupt occurs, and if the information has been written, the information receiving module 15 finds the information C.

The search cycle of the information exchange area is set so as to fall within the allowable dryness range, thereby ensuring that the data exchange area can be kept within the allowable dryness range.

(51WJMga The present invention will be described in detail below with reference to several examples.

FIG. 3 shows the information sending module 14. Details #l of the customary reception module 15 are shown.

The 5e information of the 1'11 information is sent via the exchange area 11 in the computing engine shared memory 1, as in the conventional system. In the information exchange area, there is an M7. Fgu 111ft
Be equipped.

The debt transmission module 14 stores the information in the exchange area 11 and turns on the M flag 111t.

- The information receiving module 15 is activated by a periodic timer 50 interrupt. First, a cycle time is set in the cycle timer 5 in order to generate the next timer interrupt. Next, the M flag 1llt- is determined. If the M flag is ON, the information has been written into the exchange area 11, so it is extracted from the 7fLt exchange area and processed.

After the connection, turn off the M flag. Information is exchanged through the above-mentioned crafts.

Figures 4 and 5 show switching rates between the conventional method and the method of the present invention.

jttJ! BK7 lag 112 indicating whether or not the inter-computer/cage bus 2 is operating normally for 1 yen of shared memory
Equipped with. When the BK flag is OFF, the state is ttx.
This shows that the Ikuma linkage bus 2 is working normally. In this case, a conventional method for establishing a ridge-nose machine threshold using the inter-machine shared memory 1 and the computer linkage bus 2 is performed. That is, the transmitting module 12 and the injury module 13
works.

At this time, 50 interrupts of the 1-cycle timer occur at intervals of one foot,
The old module 15 also operates, but as shown in FIG.
c. Since the M flag 111 is in the OFF state, the operation of the receiving module 15 is disabled and becomes Vh.

On the other hand, the ON status of BK7 lug 112 indicates that the intermachine engine cage bus 2 has malfunctioned.

This (transfer) table performs the needle cutting process related to the present invention. In other words, it includes module 14 and 5 party fake module 1
5 works.

In this way, the BK
What's going on with flag 112?

As shown in FIG.
When the engine linkage bus) is started.

If the LX does not operate normally, the LXvJM module 16 turns on the BK7 lug 112.

Turn on the M flag 111. Then I became fascinated,
If the operation of the receiver module 15 is affected, the transmitter TV 11 report when the LX team is active is affected by the receiver calculation.

After this jL, the sending and receiving module 14 and the receiving 1d module 15 perform the transfer.

Further, when the fault in the engine linkage bus 2 is recovered in 1s, the LX recovery module 17 operates.

Turn off the BK flag 112. By doing so, the 1t-x engine communication of the present invention is stopped and re-engaged.
r';i'I The FTS Isoma engine is rolled up in the Yoneju style.

Backup using the conventional method is performed using the above manual HL.

(6) Summary As summarized above, according to the present invention, in the Reisobin computer system, the shared memory of the machine engine that connects the %JL iso and the periodic timer provided in each rrFs iso are used. % elbow calculation iso threshold intersection can be performed.

Therefore, i!S, i! tJ! The present Afi method can be applied as a backup power method for a system equipped with the Isoyami Father Shin method or an iti nose intermachine engine cage bus.

[Brief explanation of the drawing]

The block diagram is a block diagram showing the old version of the nose-resistant machine exchange. FIG. 2 is a block diagram showing -*IMfIl of the present invention, and FIG. 3 is a block diagram showing the tW sending old module 14. Detailed diagrams of the right-of-way reception module 15, Figures 4 and 5 show the comparison between the system of the present invention and the conventional system.
? ) /IJ l μ−vJ Z
Figure 13 Figure 4 Figure 'vJ s Figure

Claims (1)

[Claims] 1. Correction of a number 3! In a compound computer system configured so that the computer can be connected via the computer shared memory, each computer is equipped with a periodic timer, and the shared memory between the computers is used as the love@patriarchy area. Ukebu II! li
The nose machine uses a periodic timer to interrupt the timer at regular intervals.
At this timing, search to see if the computer on the side has injected information t'' into the information exchange area, and if it rarely occurs after convolution, then extract it tvt. A communication method between computers that exchanges information.