JPH0721766B2 - FORTRAN I/O control processor - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a FORTRAN input/output control processing device, and in particular to a FORTRAN input/output control processing device which performs high-speed processing by treating a specified virtual file area (called an in-core file area in the embodiment) in a virtual memory space specified using a DD statement as a data set and directly transferring data to and from the virtual file area, without making any changes to a program written using FORTRAN input/output statements.

[Problems to be solved by the prior art and the invention]

Conventionally, input/output control using FORTRAN input/output statements is performed by analyzing the FORTRAN input/output statements as shown in Figure 7. The process involves analyzing the input/output statements and accessing, for example, an external file 1 (read or
When writing data, the illustrated data management unit 4, which is one of the functions of the OS, sequentially performs the illustrated processing.
As shown on the right side, specified data was transferred from the data area 3 in the main memory to the buffer area 2 and then written to the external file 1, or data read from the external file 1 was transferred to the buffer area 2 and then written to the data area 3.

For this reason, when using a program that uses FORTRAN I/O statements to perform complex scientific and technological calculations, for example, even if you want to temporarily store the intermediate results of the calculation in an area that can be accessed quickly, you have to perform I/O processing each time, as mentioned above, which creates a large overhead for I/O processing and makes it difficult to perform calculations quickly.On the other hand, rewriting a program that has already been created using FORTRAN I/O statements into a form that does not use FORTRAN I/O statements takes an extremely long time.

[Means for solving the problem]

In order to solve the above problems, the present invention performs high-speed calculations without modifying FORTRAN input/output statements by treating a virtual file area secured by specifying it using a DD statement as a data set and directly transferring data between the virtual file area and a specified data area.

Therefore, the FORTRAN input/output control processor of the present invention is
FORTRAN performs data input/output processing using RAN input/output statements
An input/output control processing device comprising: a declaration means for declaring a virtual file area for storing data in a virtual memory space; an interface means for storing information about the virtual file area declared by the declaration means and notifying the stored information about the virtual file area in a form of a response to a macro instruction issued by a routine executing the FORTRAN input/output statement for initiating a process using the virtual file area; and a data transfer control means for transferring data between a predetermined virtual file area and a data area in the virtual memory space based on the information about the virtual file area notified by the interface means,
This is characterized in that, without the intervention of the input/output processing function of S, FORTRAN input/output statements are directly processed by the data transfer control means in the form of data transfer processing between the data area and the virtual file area while the FORTRAN system is in operation.

[Example]

An embodiment of the present invention will be described in detail below with reference to the drawings. In this embodiment, the virtual file area is made available during vectorization processing, and the virtual file area is secured by issuing a VPINIT macro instruction that instructs the start of vectorization processing. In this embodiment, the virtual file area is called an in-core file area.

FIG. 1 is an operation explanatory diagram for explaining the operation of one embodiment of the configuration of the present invention, FIG. 2 is a configuration diagram of one embodiment of the present invention, and FIGS. 3 to 6 are operation explanatory diagrams for explaining the operation of the one embodiment of the configuration of the present invention shown in FIG.

In Figs. 1 to 6, 1 is an external file, 2 is a buffer area, 3 is a data area, 4 is a data management unit, 5 is an in-core file area which is a virtual file area of the present invention, 6 is a virtual memory space composed of a main memory area and an extended area, 7-1 and 7-2 are VPDSs in the region of a control table showing in-core file information, 8 is a FORTRAN input/output control processing unit, 9 is a declaration means, 10 is a
indicates an interface means, 11 indicates in-core file information, and 12 indicates a data transfer control means.

In Fig. 1, an in-core file area 5 related to the virtual file area of the present invention is provided as a temporary storage area within a virtual storage space 6 in the figure by defining it as described later. The in-core file area 5 can be located either within the main storage area or within an extended area. When a program using FORTRAN input/output statements is executed, data is transferred directly between the in-core file area 5 and the illustrated data area 3 as described later, i.e., by a data transfer process between storage areas, instead of the conventional input/output process involving the data management unit 4 of the OS as shown in Fig. 7.
Therefore, for example, intermediate results generated by the above-mentioned scientific and technological calculations can be temporarily stored in the in-core file area 5, thereby enabling high-speed calculation processing. The configuration and operation of the present invention will be described in detail below.

In Fig. 2, the part above the dashed line shows a conventional configuration for performing FORTRAN input/output processing, and the part below the dashed line shows the configuration of an embodiment for performing in-core file input/output processing according to the present invention. In particular, in this embodiment, the data area 3 and the in-core file area 5 in the figure are both provided within the main memory area. For this reason, it is not necessary to perform page switching, which is required when the in-core file area 5 is provided within the extended area, as in the embodiment described later in Fig. 4, and the configuration allows for extremely high-speed in-core file input/output processing.

In FIG. 2, when a FORTRAN program (not shown) is input and the result of analysis shows that data transfer using the in-core file area is specified by the declaration means 9 in the form of a DD statement, the interface means 10 transmits information about the in-core file area 5 specified by the declaration means 9 as follows:
Store as in-core file information 11.

Next, when an input/output statement in the FORTRAN program is executed and the run-time routine issues a VPINIT macro instruction (vectorization process start instruction) which instructs the start of vectorization process execution, which will be described later with reference to Figure 6, the interface means 10 responds by reading the in-core file information 11 and notifying the data transfer control means 12. This VPINIT macro instruction is used to subsequently access any vector instruction and the in-core file area 5.
This tells the system that and are to be used.

The data transfer control means 12 controls the transfer of data between an in-core file area determined based on the in-core file information 11 notified by the interface means 10 and a data area defined by input/output statements of the FORTRAN program.

FIG. 3 shows an example of a DD statement for declaring the in-core file area 5. By executing the declaration statement as shown in the figure,
For example, as shown in FIG. 2, an in-core file area 5 can be reserved in the main storage area.

In the diagram, ddn describes the name of the DD statement.

In the figure, SPACE describes the amount of space in the in-core file area 5. In the figure, sk indicates the amount of space in K bytes (1
The data is written in units of 024 bytes, and in the figure, s [M]
This describes the amount of space in units of M bytes (1024 K bytes). By describing this amount of space, for example, the size of the in-core file area 5 to be secured in the main memory area shown in FIG. 2 is determined.

In the figure, dsn is written when the name of the in-core file area is required. In the figure, dcb is written when DCB information is required.

By executing the above-mentioned declaration statement (DD statement), it is possible to secure an in-core file area 5 of a prescribed size within the main memory area shown in FIG.

FIG. 4 is a block diagram for explaining an embodiment of the in-core file input/output process of the present invention. In this embodiment,
The in-core file area is located within an extended area of the virtual memory space.

The diagram shows a block that performs analysis processing of FORTRAN input/output statements. This analysis processing means interpreting the contents required for in-core file input/output processing using the in-core file area 5. If in-core file input/output processing is to be performed as a result of this interpretation, the block and are executed.

In the figure, this is a block that performs analysis processing of input/output data items. This is a block that performs analysis processing of VP issued by the run-time routine.
This means that in response to the INIT macro instruction, analysis processing is performed on the contents declared using the DD statement described above for FORTRAN input/output statements (such as the size of the in-core file area 5), and information such as the size or starting address of the in-core file area is notified to the issuer of the VPINIT macro instruction.

As shown by the arrow on the right side of the figure, this is a block that directly performs data transfer processing (in-core file input/output processing) between the in-core file area 5 and the data area 3. The data transfer is performed directly between them using vector instructions or transfer instructions, etc.

FIG. 5 is an explanatory diagram for explaining the operation of an embodiment in which in-core file information required for performing in-core file input/output processing is set.

In the figure, in-core file areas 1 to n in virtual memory space 6 are secured by executing the above-mentioned DD statement. Each of in-core file areas 1 to n is defined by a different piece of in-core file information.

In the figure, intra-region VPDS7-1 is a control table showing in-core file information corresponding to one in-core file area, and is stored at a specified address in the area (region) where the user program is loaded and executed. Similarly, intra-region VPDS7-2 shows a control table of in-core file information corresponding to another in-core file area. As mentioned above, the start addresses of these control tables are returned from an interface (not shown) in a form corresponding to the VPINIT macro instruction issued by the runtime routine of the FORTRAN input/output statement to an interface (not shown). The first intra-region VPDS
Within 7-1, the following region VPDS7-2 is shown in the figure.
In-core file information such as a pointer indicating the in-core file area 5, the DD name, the start address of the in-core file area 5, and the length of the in-core file area 5 is stored. Based on this in-core file information, in-core file input/output processing (data transfer processing) is executed directly between a predetermined in-core file area 1 to n in the virtual memory space 6 and the data area 3. At this time, the OS (operating system) does nothing regarding the data transfer between the in-core file area 5 and the data area 3. The data transfer is processed directly using a transfer instruction or a vector instruction.

In the figure, VPDS7-2 in the region is the VPDS7 in the region
The in-core file information to be executed next, designated by the illustrated pointer in −1, is stored in the in-core file area 1. In this manner, a plurality of in-core file areas 1 to n are designated in sequence, and data transfer between the in-core file area 1 and the data area 3 is performed directly in sequence as necessary.

FIG. 6 shows an example of the VPINIT macro instruction.

In the figure, operation "VPINIT" means that the task that issued the VPINIT macro instruction will thereafter use the VP instruction and in-core file area 5. Therefore, after the macro instruction is issued, the VP instruction and in-core file area 5 can be freely used until the task ends. Then, as explained using Figure 5, the address at which VPDS7-1 in the region is stored is stored in register (1, not shown) and returned to the run-time routine that issued the VPINIT macro instruction.

[Effects of the Invention]

As explained above, according to the present invention, the in-core file area reserved by specification using the DD statement is treated as a data set and can be used by the OS without modifying the FORTRAN input/output statements.
Since data transfer processing (in-core file input/output processing) is performed directly between the in-core file area and the data area without any intervention, high-speed input/output processing is possible within a closed range while the FORTRAN system is operating.

In other words, according to the present invention, a file storage area designated by the user is secured in part of the main memory and made available for use, so no changes are required at the application program level, and it is easy to achieve speeds up to several thousand times faster than the input and output of normal programs.

[Brief description of the drawings]

Fig. 1 is an explanatory diagram for explaining the operation of one embodiment of the present invention, Fig. 2 is a diagram of one embodiment of the present invention, Figs. 3 to 6 are explanatory diagrams for explaining the operation of one embodiment of the present invention shown in Fig. 2, and Fig. 7 is an explanatory diagram for explaining the operation of a conventional FORTRAN input/output control processing method. In the diagram, 1 represents an external file, 2 represents a buffer area, 3 represents a data area, 4 represents a data management unit, 5 represents an in-core file area, 6 represents a virtual memory space, 7-1 and 7-2 represent VPDS within the region, 8 represents a FORTRAN input/output control processing device, 9 represents a declaration means, 10 represents an interface means, 11 represents in-core file information, and 12 represents a data transfer control means.

Continued from the front page (56) References: JP 58-105361 (JP, A) Nikkei Electronics, April 11, 1983 issue, Nikkei McGraw-Hill, pp. 159-184

Claims (1)

[Claims] [Claim 1] A FORTRAN input/output control processor which performs input/output processing of data using FORTRAN input/output statements, comprising: a declaration means for declaring a virtual file area for storing data in a virtual memory space;
The system is provided with an interface means for notifying information about the stored virtual file area in the form of a response to a macro command issued by a routine executing a RAN input/output statement that indicates the start of processing using the virtual file area, and a data transfer control means for transferring data between a specified virtual file area and a data area in a virtual memory space based on the information about the virtual file area notified by the interface means, and the system is capable of executing the FO without the intervention of the input/output processing function of the OS.
1. A FORTRAN input/output control processing device, comprising: a data transfer control means for directly processing FORTRAN input/output statements in the form of data transfer processing between said data area and said virtual file area while said RTRAN system is in operation.