JPS58166468A - Interrupt dump output processing system - Google Patents

Abstract

PURPOSE:To output the possible accurate memory contents in starting dump processing, by performing operation in activity mode wherein high execution priority is given. CONSTITUTION:A dump postprocessing part 14 permits all input/output interruptions and also resets the inhibition of a timer interruption, etc., to return a system to its original state, advancing the control to an activity exit. At the activity exit, an unnecessary SRB9, etc., is released and then the service of the system is restarted successively. Further, a dump preprocessing part 12, dump output processing part 13, and dump post processing part 14 can be started from anothr general system processing part through a branch interface. In this case, after the processing of the dump post processing part 14 ends, the control is only returned to the system processing part by the branch interface.

Description

[Detailed description of the invention] (1) Technical field of the invention The present invention is an included dump output processing method.

In particular, the present invention relates to an included dump output processing method in which, when a dump processing request for memory contents is made, the system is kept quiet and memory information at the time when the dump processing request is made can be output.

(2) Technical background A data processing device processes data using a huge number of processing instructions, and if even one of these instructions is erroneous, the system will not operate properly.

When a system malfunctions due to an error, information about the memory contents at the time of the malfunction provides a clue as to which instruction or logic was being idle. By analyzing the memory contents at that time, we can determine which processing routine was operating at the time of the abnormality.
The normality of pointers, etc. in various control tables can be determined, which can be used to identify error points.

(3) Prior art and problems Conventional 1 For example, when collecting a memory dump for debugging as described above, the content of the memory is read and the data stored in an external storage device such as a magnetic disk device is used. The process that outputs data to the dump file was run under a task in cases other than system down. The task is.

CPU managed by the operating system (O8)
It is a unit of contention for usage rights. By operating the dump process under the task, when outputting wrinkle memory information to Danboo 7 isle, the operating system's eye function 1
For example, input/output macro instructions such as the BXCP macro provided by the I10 supervisor can be used. But 9
On the other hand, there were the following problems.

Rounding off the dump process to operate under a task.

It has a close relationship with the operating system.

The problem is that various mechanisms of the operating system operate together during dump collection, and the shared space of the system changes over time, making it impossible to collect accurate dumps. The contents of memory change over time and the dump Q
Since the changed information is stored in the file, it is not only difficult to find the error location, but in some cases, it is not uncommon to lose all clues.

t+, since many functions of the operating system will be used, if there is an abnormality in the related part of the operating system.

There is also a high probability that the task of the dump processing itself will not operate normally.

Generally, in the case of an abnormality that makes it difficult to continue the service,
After the dump meeting is taken, the system is brought to a halt state and becomes system down; however, in other cases, the system is required to continue operating after the dump is taken.

(4) Purpose of the Invention The present invention aims to solve the above-mentioned problems and to make it possible to output memory contents as accurate as possible at the time of startup of dump processing.

(5) Structure of the Invention In order to achieve the above object, 1. The interwoven dump output processing method of the present invention provides a virtual dump file on a predetermined external storage device, triggered by a 4III-specified external interrupt or an instruction from the system processing unit. In the interlaced dump output processing method that outputs the memory contents of the space, the space of the core system is put into a quiescent state by disabling the system from interrupts, and at the same time, the space of the core system is put into a quiescent state by disabling the system and the channel connecting the external storage device where the dump file exists is A dump preprocessing unit that enables input/output interrupts, picks up input/output interrupts from the corresponding channel, and freezes the input/output device; and a dump preprocessing unit that enables input/output interrupts from the corresponding channel and freezes the input/output device, and a standalone mode that issues a direct input/output start command and writes the memory contents of the virtual space to the above. A dump output processing unit that outputs to a dump file.

Equipped with a dump post-processing unit that enables all input/output interrupts and releases system interrupt prohibition.
Performing dump processing by operating the dump pre-processing section, the dump output processing section, and the dump post-processing section in an activity mode in which an execution priority is given higher than the execution priority of other general processing. -It is a feature.

Embodiments will be described below with reference to the drawings.0 (6) Embodiment of the Invention@1 Figure shows the configuration of an embodiment of the present invention, and Figure 2 is an explanatory diagram of dump output processing.

In the figure, 1 is an operation panel, 2 is an interwoven key provided on the operation panel 1 which, when pressed, generates an external interrupt sound for the sequence of commands currently being processed, and 3 is an interwoven key provided on the operation panel 1. 4 is a data processing device that fetches and executes instructions; 4 indicates the current state of the system; and a current P 8 W (P 8 W) indicating the address of the instruction to be executed currently;
graph + 5tatus Word).

5 is a new P that is provided for each type of interrupt and holds the start address of a group of instructions to be executed when that interrupt occurs.
8W, 6 is the old P8W where the contents of the current P8W4 are saved when an interrupt occurs, and 7 is the old P8W, where the contents of the new P8W5 for external interrupts are stored in P8W4, and control is transferred to the contents of the external interrupt. 8 is a queue terminal that points to 5RB9t, and 9 is a queue terminal that points to an external interrupt handler that processes the external interrupt according to the request.9 is an 8RB that exists for each activity 11, and stores the attributes of that activity 11 and is used for scheduling execution. (8arcmR
49 (at Black) and 10 a dice batcher which schedules activities, tasks, etc. according to their execution priorities and gives control to the CPU.

11 is an activity that secures CPU resources preferentially, 12 is a dump preprocessing unit that performs processing to prepare the necessary environment before actually executing dump output, and 13 is an ms other than dump output. and issues an input/output start command to dump the memory contents of the virtual space 15 into a dump file 27.
14 is a post-dump processing unit that performs processing to restore the product term of the system; 15 is a multiplexed nine virtual space; for example, one virtual space has an address space of 16 megabytes; 16
F1 A system common area on a virtual space that is common to each virtual space and exists only once in the system, 17 is an individual user area whose contents differ for each virtual space, 18 to 20 are channels, 21 to 26 Fi input/output devices In %, 21 and 22 are magnetic disk devices, and 27 is virtual space 1.
5 respectively represent dump files reserved in advance for dumping the memory contents of 5.

When the operator presses the interwoven key 2 on the operation panel 1, an external interrupt is generated, interrupting the processing of the command group currently being executed, and changing the contents of the current P8W4 to the old P8.
It is saved to W6. At the same time, the start address of the external interrupt hunt rough is stored, and the contents of Kushin P8W5 are stored in the current P8W5.
Loaded into 8W4. As a result, control is transferred to the external interrupt handler 7 when the primary instruction is executed. The external interrupt handler 7 checks the cause of the external interrupt using the interrupt code. If it is determined that the interwoven key 2 has been pressed.

It is interpreted as an interleaved dump request.

8RB9t- is created in order to operate the dump processing under the activity 11, and is queued to a predetermined queue terminal 8.

The dispatcher 10 is activated as appropriate and schedules CPU resources to activities and tasks. In particular, when 8RB9 of the activity 11 with a high execution priority is connected to a predetermined queue terminal 8, #'
i, Activity 111 based on the contents of 8RB9
-Start. Dump front outside 1 under activity 11
2. The dump output processing section 13 and the dump post-processing section 14 execute dump processing as shown in FIG.

The dump preprocessing unit 12 first disables 9 interrupts in order to stabilize the system by performing the process (5) shown in FIG. Interrupts are prohibited by setting a predetermined mask pit t-“0” in the PAW or control register (not shown) P3. By doing this, only the activity 11 becomes runnable, tasks operating in all other spaces of the system, other activities, timers, etc. become stationary, and the memory contents are fixed.

Next, in order to keep the input/output device in a quiescent state, a mask is applied so that input/output interrupts are rejected.
Since it is necessary to perform input/output to the magnetic disk device 21 of the dump file 27 in order to write the memory contents, channel 1 to which the magnetic disk device 21 is connected is
Channel 8 is enabled for interrupts and picks up interrupts from channel 1B due to completion of input/output operations that have already been activated.

For example, channel 18 may be enabled for interrupts and wait for about 5 seconds. When the above processing is completed and the product terms for taking a dump are ready, control is transferred to dump output processing s13.

The dump output II@13 outputs the memory contents of the virtual space 15 to the dump file 27 on a standalone basis by the process shown in FIG. In other words, EXCP provided by ■10 supervisor of the overrating system.
CCW (C4g5+amlCo*wna*d ”i'1
ard) and directly issues an input/output activation command such as an 8IO command to execute the output processing 3M. By doing so, changes to the memory contents at the time when a dump processing request is issued can be suppressed to the necessary minimum, making it possible to collect accurate dumps. Note that before issuing the above input/output start command, save the new P8W50 internal answer for input/output interrupts.

The addresses of the instruction group for processing interrupts in the dump output processing section 13 are stored in the new psws. In this way, even if there is an interrupt from the channel 18, control will be passed directly to the dump output processing section 13. The contents of P8W5 are saved and restored when all dump outputs are completed. Once the dump output is finished,
Control is transferred to the dump post-processing section 14.

The dump post-processing unit 14 enables all input/output interrupts, as shown in process 0 in FIG.

Disable interrupts such as timer interrupts, restore the system to its original state, and transfer control to the activity exit. At the activity exit.

8RB9, etc. that are no longer needed are released, and then the system service is restarted.

Note that the dump preprocessing unit 12. As shown in FIG. 2, the dump output processing section 13 and the dump post-processing section [14] can also be activated from another general system processing section using a branch interface instead of using an external interrupt interface. In this case.

After the processing of the dump post-processing unit 14 is completed, control may be returned to the system processing unit via the branch interface.

(7) As described in detail, according to the present invention, the memory content dump output processing tube can be operated only in the following range within the system common area.
Accurate dumps can be collected when a system error other than a system failure occurs. Mayu, save the system state when outputting a dump.

Since the restoration is almost complete, system services can be restarted without interruption and subsequent processing being aborted. Therefore, in addition to debugging the system,
It can also be used to investigate memory usage.

[Brief explanation of drawings]

FIG. 1 shows the configuration of an embodiment of the present invention, and FIG. 2 shows an explanatory diagram of dump output processing. In the figure, 1 is the operation panel, 2Fi interwoven keys, 3
Fi data processing device, current PAW from 4 companies, 5#'i new P8W
, 6 is the old P8W, and 7 is the external interrupt handler. 8ti queue terminal, 9 is 8RB, 10 is dispatcher, 11 is activity, 12 Vi dump preprocessing unit, 13 is dump output processing unit, 14 butterfly dump postprocessing unit,
15 represents a virtual space, 18 to 20 channels, 21 to 26 input/output devices, and 27 a dump file.

Claims (1)

[Claims] A specific external interrupt t7't disables the system from interrupting in the interconnected dump output processing method that outputs the memory circle W in the virtual space to a dump file on a predetermined external storage device based on instructions from the system processing unit. By doing this, the space of the system is put into a quiescent state, and the input/output interrupts are enabled for the channel connecting the external storage device where the dump file exists, and the input/output interrupts from the relevant channel are picked up and the input/output device is The dump preprocessing unit performs staticization, and the standalone φ mode issues direct input/output start commands to create the memory circle in the virtual space! Ft It is equipped with a dump output processing section that outputs to the dump file mentioned above, and a dump post-processing section that enables all input/output interrupts and cancels system interrupt prohibition. An interwoven dump output processing method characterized in that dump processing is performed by operating the processing unit and the dump post-processing unit in an activity mode in which execution priority is given higher than the execution priority of other general processing. .