JPH03102555A - Tracing system for host connecting mechanism - Google Patents

Abstract

PURPOSE:To easily analyze the contents of a fault by sampling trace data at the time of fault generation to a memory in the internal part of a communication control processing system by a host connecting mechanism. CONSTITUTION:When a designated request is completed to an input/output designation code to input/output control 24 of a host connecting mechanism 21, a fault detecting means 27 in a host connecting mechanism control driver 22 analyzes the contents of an operation end state in an input/output request block. In the case of a normal end, the next input/output request is executed and in the case of an abnormal end, notification is executed to a trace sampling means 28. According to the notification from the fault detecting means 27, the contents of a memory 26 for local trace in the internal part of the host connecting mechanism 21 are sampled to a memory 29 for trace sample by a trace sampling means 28.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tracing method for a host connection mechanism implemented in a communication control processing device system connected to a host computer system, and in particular to Regarding the method of collecting trace information at times.

[Conventional technology]

Conventionally, in the trace method of the host connection facility in the communication control processing unit system, traces were not collected within the host connection i premises, and the host connection control driver was used within the host connection facility when a failure occurred next to the host connection device. The contents of the registers are collected in the internal memory of the communication control processing device system, and when a failure is to be analyzed, the memory of the communication control processing device system is stamped.

[Problem to be solved by the invention]

In the conventional communication control processor system host 1 to connection mechanism 1 to race method described above, tracing is not performed in the host connection mechanism. Therefore, the only information available is register information when a failure occurs in the post connection mechanism, which has the disadvantage that failure analysis is extremely difficult.

In addition, for failures related to logical contradictions in the input/output control sequence from the communication control processor system or the data transfer control sequence with the host computer system, collect register information from host 1 to the connection mechanism when the logical contradiction occurs. I can't analyze it at all because I can't.

[Means to solve the problem]

The 1 to 1 north method of the host 1 and connection mechanism of the present invention allows input/output control events from the communication control processing device system and data transfer control events with the boss 1 and computer system to be carried out within the host 1 to connection device. A connection mechanism control driver to the host 1 controls the input/output of the post connection mechanism, and a means for registering the local 1~race memory to the host 1.
~Means for detecting that a failure has occurred in the connection device, and 1~Collecting the race data traced to the host connection mechanism control driver or the local I/race memory to the internal memory of the communication control processing device system. and is configured to collect the 1 to race status when a failure occurs in the host/connection mechanism into a memory inside the communication control processing device system.

〔Example〕

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

FIG. 1 is an elliptic diagram of an embodiment of the present invention. In the figure, a communication control processing device system 2 is connected to a host computer system 1 via an inter-device communication path 3. A host connection mechanism 21 that controls data transfer with the host computer system 1 is installed in the communication control processing device system 2 .゛The host connection mechanism 21 operates by the host connection mechanism control driver 22 according to the request specified in the input/output command code of the input/output request block as shown in FIG. Data transfer control 23 with the host computer system A host connection mechanism 1 to race means 2 that sequentially trace traces during operation to the local 1 to race memory 26.
Contains 5.

The host attachment control driver 22 controls the host attachment 2.
A means 27 for detecting a failure at the time of a request to the host 111 and a means 27 for detecting a failure at the time of a request to
1,000 stages 28 for collecting the contents of the local trace memory 26 inside the communication control processing device system 2 into the trace collection memory 29 inside the communication control processing device system 2.

Next, the operation of the present invention will be explained.

First, referring to FIG. 3, post connections ′j! The A structure trace 1,000 steps 25 accepts an input/output operation request for the input/output control 24 from the boss I/connection mechanism control driver 22 (step 31), and races the input/output request flock from 1 to the local trace memory 26. , if overflow occurs, the local 1 to l/-space memory 26 is traced by 1 from the beginning (steps 32, 33, and 34).

After the trace is collected, processing according to the four-force operation request is performed (step 35).

Next, referring to FIG. 4, the equipment related communication history ii! Data transfer control 23 from host computer system 1 via 83
Receive data transfer for =J (Step 4) ->,
The operating state is traced from the local 1 to the race memory 26, and if OHA flow occurs, the operation is traced from 1 to the beginning of the local trace memory 26 (step 4.2.4344). 1- After collecting the races, data transfer processing with the host computer system 561 is performed (step 45).

Next, referring to FIG. 5, when the input/output operation request from the host attachment control driver 22 to the input/output control 24 is completed (step 51), an input/output request block is stored in the local trace memory 26 from 1 to 1. If there is an overflow, tracing starts from the beginning of the local trace memory 26 (steps 52, 53, and 54).
).

After collecting the trace, a completion notification is sent to the host attachment control driver (step 55).

Next, referring to FIG. 6, when the failure detection means 28 in the host connection mechanism control driver 22 completes the request specified in the input/output command code of the input/output request block for the input/output control 24 of the host connection mechanism 21. (Step ゜61
), the contents of the operation completion notice B1 in the input/output request block are analyzed, and if the completion is normal, the next input/output request is made (step 62 and 63), and if the completion is abnormal, the trace collection means 27 is notified. (Step 64).

Next, referring to FIG. 7(a), the trace collection means 28 in the host connection machine elliptical control driver 22 has a failure detection stage 2.
7 (step 71), an input/output request block for collecting the local trace memory 26 traced by the host attachment tracing means 25 is created (step 72), and A trace collection request is made to (step 73). In the input/output request book, set the trace collection request code in the input/output command code, set the size of the trace to be collected in operation information 1, and set the memory address to store the trace to be collected in operation information 2. (See Figure 2).

Furthermore, with reference to FIG. 7(b), step 74.75>Input/output control #24 of the host attachment facility where the trace collection request is received is the trace to be collected specified in the operation information 2 of the input/output request block. The contents of the local trace memory 16 for the size of the trace to be collected specified in the operation information 1 are transferred to the memory for storing the trace (step 7).
677).

〔Effect of the invention〕

As explained above, the present invention sequentially traces input/output control events from the communication control processing device system and data transfer control events with the host computer system in the local trace memory within the host connection mechanism.
When a failure is detected during a request to the host connection mechanism, the contents of the local trace memory within the host connection mechanism are collected into the trace collection memory within the communication control processing device system, resulting in the following effects.

(1) When a failure occurs in a host connection mechanism, the content of the failure can be easily analyzed by analyzing the trace of the host connection mechanism.

(2) Even for failures related to logical contradictions in the input/output control sequence from the communication control processing device system or the data transfer control sequence with the host computer system, the cause of the failure can be determined by analyzing the trace flow.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of an embodiment of the present invention, Fig. 2 is an explanatory diagram of an input/output request block, Fig. 3 is a flowchart when accepting an input/output request, and Fig. 4 is a flowchart when data transfer operation is completed. , 5th
The figure is a flowchart for notifying the completion of an input/output request, Figure 6 is a flowchart for failure detection means, and Figures 7(a) and (b) are flowcharts for a trace collection means and a flowchart for requesting trace collection from a host connection facility. This is a flowchart. DESCRIPTION OF SYMBOLS 1... Host computer system, 2... Communication control processing device system, 21... Host connection mechanism, 22... Host connection machine elliptical control driver, 25... Host connection mechanism trace means, 26... Local trace memory for, 27
...Failure detection means, 28...Trace collection means, 2
9...Memory for trace collection.

Claims (2)

[Claims] (1) A means for tracing input/output control events from the communication control processing device system and data transfer control events with the host computer system to a local trace memory inside the host connection mechanism, and controlling the input/output of the host connection mechanism. means for the host attachment control driver to detect the occurrence of a failure in the host attachment mechanism; 1. A trace method for a host connection mechanism, comprising means for collecting trace data in a memory, and collecting trace data when a failure occurs in the host connection mechanism in a memory inside the communication control processing device system. (2) A host that traces input/output control events from the communication control processing device system and data transfer control events with the host computer system to a local trace memory inside the host connection facility, and controls input/output of the host connection facility. The attachment mechanism control driver detects that a failure has occurred in the host attachment mechanism, and the host attachment mechanism control driver collects trace data traced in the local trace memory to a memory inside the communication control processing unit system. . A trace method for a host connection mechanism, characterized in that trace data when a failure occurs in the host connection mechanism is collected in a memory inside the communication control processing device system.