JPS6373440A - Stall monitoring system - Google Patents

Abstract

PURPOSE:To ensure the stall monitor even with a trouble of the power supply of a central processing unit CPU or a clock trouble, by adding a power supply device different from that of the CPU to a stall monitor device. CONSTITUTION:The CPU 11 and 12 and input/output controllers 31 and 32 give accesses to a main memory 5 via a system controller 4. While a service processor 6 gives accesses to the memory 5, the CPU 11 and 12, and the controllers 31 and 32 respectively. The stall monitor devices 21 and 22 hold directly independent power supply devices and the monitor time and receive the monitor start indications and the information of the monitor time from the CPU 11 and 12 to hold the monitor time. At the same time, both devices 21 and 22 replace their holding time every fixed period of time and informs the end of replacement to the processor 6 when said end of replacement is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a stall monitoring system for information processing devices, and more particularly to a stall monitoring system that includes a stall monitoring device connected to each central processing unit.

(Prior Art) Conventionally, this type of stall monitoring device has been installed inside a central processing unit.

(Problems to be Solved by the Invention) The nine conventional stall monitoring devices described above are installed inside the central processing unit and use the same power source and the same clock as the central processing unit. If the central processing unit becomes inoperable due to a failure of the power supply or the relevant clock, there is a drawback that the above-mentioned system cannot be monitored.

An object of the present invention is to enable a central processing unit to issue an instruction to start/stop stall monitoring, provide the stall monitoring device with a power supply unit different from the central processing unit, and provide an instruction to start monitoring from the central processing unit. The above-mentioned drawbacks are eliminated by receiving a notification of the monitoring time, retaining the monitoring time, updating the retained value at regular intervals, and notifying the service processor of the end of the update when the end of the update is detected. An object of the present invention is to provide a stall monitoring system configured to monitor stalls regardless of the operation of a central processing unit.

(Means for Solving the Problems) The stall monitoring system according to the present invention comprises one or more central processing units, a service processor, and one or more stall monitoring devices placed for each central processing unit. be.

In the above, the central processing unit is capable of instructing the stall monitoring device to start/stop monitoring.

On the other hand, the stall monitoring device uses an independent power supply and directly maintains the monitoring time, updates the value at regular intervals based on the monitoring start instruction from the central processing unit, detects the end of the update, and provides service. This configuration includes a counter means for notifying the processor of the completion of the update.

(Example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the stall monitoring method according to the present invention. In Figure 1, 11
．． 12 is a central processing unit, 21 and 22 are stall monitoring devices, 31 and 32 are input/output control devices, 4 is a system control device, 5 is a main storage device, and 6 is a service processor.

In FIG. 1, central processing units 11 and 12 and input/output control units [31 and 32 access the main storage unit 5 via the system control unit 4. The service processor 6 accesses the main storage device S, the central processing unit 11.12, and the input/output control device 31.32 via the system control device 4. The stall monitoring devices 21 , 22 are each connected to the central processing unit 11 , 12 and also to the service processor 6 .

FIG. 2 is a block diagram showing the stall monitoring device 21, 22 of FIG. 1 in detail. In FIG. 2, 10 is a clock oscillator, 1] is a power supply device, ]2 is an OR gate, 13 is a clip 70 tube, ]4 is an AND gate, and 1S is a counter.

In FIG. 2, stall monitoring devices 2 and 22 are respectively a clock oscillator lO, a power supply 11, a counter S, a register 16, a clip-flop 13, and an O
It is composed of an R gate 12 and an AND gate 14.

When a monitoring signal is outputted from the central processing units) 1 and 12 via the signal line 202, and at the same time a monitoring start instruction signal is outputted via the @return line 201, the monitoring time is set in the counter 5. For example, if the monitoring time is 1 second and has an 8-bit configuration, the monitoring time will be from 1 second to 256 seconds, but this can be increased or decreased as necessary.

When the flip-flop 13 is set, the output of the 7-ribbon flop 13 (on the signal line 206) and the output of the clock oscillator (on the signal line 205) are added to the AND game 14, where the logical product of the two is calculated. . The logical product instructs the counter 15 to count down via the signal line 207. The countdown is Flip Frog 13 or %II
However, during this period, if the stall monitoring start instruction signal is output again from the central processing unit 11 or 12, or if the stall monitoring stop instruction signal is not output via the signal line 200, When the value of the counter 15 runs out, a borrow signal is output, and an update completion signal is notified to the service processor 6 via the signal line 204. At this time, the clip 70 knob 13 is also reset.

When instructing the central processing units 11 and 12 to stop stall monitoring, a stop instruction signal may be output to the signal line 200.

When the service processor 6 receives the update completion signal from the stall monitoring device, the processing on the central processing unit (for example, the central processing unit 11) connected to the stall monitoring device (for example, the stall monitoring device 21) is abnormal. software (operating system: O3) via another central processing unit (for example, central processing unit 12).
) and ask them to use software to collect information about the system at that time and leave clues to help uncover the cause of the stall.

(Effects of the Invention) As explained above, the present invention enables the central processing unit to issue an instruction to start/stop stall monitoring, and also provides the stall monitoring device with a power supply device different from the central processing unit. , receives a monitoring start instruction and notification of monitoring time from the central processing unit, holds the monitoring time and updates the held value at regular intervals, and when it detects the end of the update, notifies the service processor of the end of the update. and K, there is an effect that a stall can be monitored even in the case of a failure of the power supply of the central processing unit or a failure of the clock.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the stall monitoring method according to the present invention. FIG. 2 is a block diagram showing an embodiment of the stall monitoring device shown in FIG. 1. 11.12... Stall monitoring device 31.32 of central processing unit 21.22... Input/output control device 4... System control device 5... Main storage device 6.・Φ・・Service processor 10・・・Clock oscillator 11・・・・Power supply device 12・・・OR gate 13・・・Clip flop 14・・・Fist AND gate 15・・・Meet・Counter

Claims (1)

[Claims] A stall monitoring method comprising one or more central processing units, a service processor, and one or more stall monitoring devices placed in each of the central processing units, wherein the central processing unit causes the stall monitoring device to monitor the stalls. The stall monitoring device is connected to an independent power supply device and directly maintains the monitoring time, and can change the value from the held value by an instruction to start monitoring from the central processing unit. 1. A stall monitoring method comprising: counter means for updating a value at regular intervals, detecting the end of the update, and notifying a service processor of the end of the update.