LXB trace stack example

This example shows a printout of the LXB portion of an internal trace record.

The LXB trace stack begins at AE90E8 and contains 29 entries. Following the figure is a list of the meanings of the routines that made each entry.

Printout of the LXB trace stack

DFSERA30 —— FORMATTED LOG PRINT
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INTERNAL TRACE RECORD
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LXB
 AE9004  000000   807F0BC9 00093660   00AE9350 00AE92B0   00091E90 00AE991C  17000000 7F0C0000
 AE9024  000020   80000000 520821CE   0008229C 000820C6   80082194 012141CE  60000054 0A000000
 AE9044  000040   30000005 022140C6   600000CE 09000000   30000005 47000000  20000001 00000000
 AE9064  000060   00000000 00000000   00000000 00000000   00000000 00000000  00000000 00000000
 AE9084  000080 TO AE90C4  0000C0   SAME AS ABOVE
 AE90E4  0000E0   00000000 0C419317   F1044193 17F10441   9337E218 D243F510  A314A8C3 419101A2
 AE9104  000100   02F30C41 93179101   A502F004 F30C4193   17F10441 93170000  00000000 00B66218

Entry: Meaning
X'OC': The first byte of this entry, the oldest entry in the trace stack, has been pushed off the trace stack. Ignore this entry.
X'41': DFSCMC40 (I/O request DIE). LXBCLIB was reset.
X'9317': DFSCMC40 (attention DIE). Operation code X'17' (ACK) was received from the other system. The LLB was posted X'7F1C0000' (ACK received).
X'F104': DFSCMC00. Operation code X'04' (WRITE) was received. The WRITE channel program was queued.
X'41': DFSCMC40. (I/O request DIE). LXBCLIB was reset. WRITE operation was completed.
X'9317': DFSCMC40 (attention DIE). Operation code X'17' (ACK) was received from the other system. The LLB was posted X'7F1C0000' (ACK received).
X'F104': DFSCMC00. Operation code X'04' (WRITE was received). The WRITE channel program was queued.
X'41': DFSCMC40 (I/O request DIE). LXBCLIB was reset. WRITE operation was completed.
X'9337': DFSCMC40 (attention DIE). Operation code X'37' (STACK) was received from the other system. The LLB was posted X'7F1C0000' (ACK received).
X'E218': DFSCMC50 (SHUTDOWN processing). Operation code X'18' (SHUTDOWN) was received. Normal SHUTDOWN was performed.
X'D243': DFSCMC10 (SHUTDOWN appendage). Channel command X'43' (enable compatibility) completed normally. The LLB was posted.
X'F510': DFSCMC00. Operation code X'10' (STARTUP) was received. The start-link channel program was queued.
X'A314': DFSCMC10 (channel-end appendage). Channel command X'14' (sense command byte) of the start-link channel program completed normally. The disable compatibility no-operation command was scheduled.
X'A8C3': DSFCMC10 (channel-end appendage). Channel command C'X3' (disable compatibility no-operation) completed normally. The startup control command was scheduled.
X'41': DFSCMC40 (I/O request DIE). LXBCLIB was reset. Channel end was received from the startup control.
X'9101': DFSCMC10 (attention DIE). Operation code X'01' (WRITE) was received from the other system. The IOSB was passed to IOS to initiate a READ.
X'A202': DFSCMC10 (channel-end appendage). Channel command X'02' (read) completed normally. The LXB was posted X'7F080000'(startup complete, startup message received).
X'F30C': DFSCMC00. Operation code X'0C' (WRACK) was received. ACK with data (WRACK) channel program was queued.
X'41': DFSCMC40 (I/O request DIE). LXBCLIB was reset. WRACK operation has completed.
X'9317': DFSCMC40 (attention DIE). Operation code X'17' (ACK) was received from the other system. The LLB was posted X'7F0C0000' (ACK received).
X'9101': DFSCMC40 (attention DIE). Operation code X'01' (WRITE) was received from the other system. The IOSB was passed to IOS to initiate a READ operation.
X'A502': DFSCMC10 (channel-end appendage). Channel command X'02' (read) was completed. The LXB was posted X'7F0C0000' (message received).
X'F004': DFSCMC00. Operation code X'04' (WRITE) was received. No I/O was scheduled. Contention exists between this WRITE operation and the WRITE operation received from the other system in the preceding 9101 entry. The device-dependent module has not yet received control in response to the LXB post traced by the preceding A502 entry.
X'F30C': DFSCMC00. Operation code X'0C' (WRACK) was received. ACK with data (WRACK) channel program was queued.
The ACK acknowledges the data received from the other system in the preceding 9101 entry. The data is the data that was not sent in the preceding F004 entry.
X'41': DFSCMC40 (I/O request DIE). LXBCLIB was reset.
X'9317': DFSCMC40 (attention DIE). Operation code X'17' (ACK) was received from the other system. The LLB was posted X'7F1C0000' (ACK received).
X'F104': DFSCMC00. Operation code X'04' (WRITE) was received. The WRITE channel program was queued.
X'41': DFSCMC40 (I/O request DIE). LXBCLIB was reset. WRITE operation was completed.
X'9317': DFSCMC40 (attention DIE). Operation code X'17' (ACK) was received from the other system. The LLB was posted X'7F1C0000' (ACK received).