PJ41139: PROVIDE TOD CLOCK VALIDATION MONITOR.
Closed as program error.
APAR NUMBER: PJ41139 PRODUCT: TPF4 FUNCTIONAL AREA: TOD CLOCK RPQ SUPPORT SHIPPED IN PUT: 26 ABSTRACT: Provide TOD clock validation monitor. APAR CONTENTS: FEATURE TYPE STATUS NAME HPO C Changed source/rt/hpo/ctdw.c PREREQUISITE APARS: To be applied in order listed. HPO C Changed source/rt/hpo/ctdw.c PJ31088(21) COMMENTS: A need exists to determine if the time of day (TOD) clock is not synchronized between the processors in a loosely coupled complex. Currently, a TOD clock validation process exists. When a processor is IPLed, restart calls program CTDV and CTDV calls CTDW. CTDW gets the current TOD clock value (TOD value 1) and sends a SIPCC to all processors in the loosely coupled complex. The other processors will get their current TOD clock value (TOD value 2) and sends a SIPCC back to the requesting processor. On return to the originating processor, the current TOD clock value (TOD value 3) is obtained again. The three TOD clock values are compared. TOD value 1 must be less than TOD value 2 and TOD value 2 must be less than TOD value 3. If this is not true, then the TOD clock is not synchronized in the loosely coupled complex. The current TOD clock validation process in program CTDW is called only in restart. If an error happens when the processor is in norm state and the TOD clock loses synchronization, there is no monitor to report that the TOD clock is not synchronized.
SOLUTION: The current TOD clock validation process has been enhanced to be a monitor. Program CTDW continues to do the same TOD clock validation process except now this process is done every minute. In addition, if the TOD clock is no longer synchronized, warning message CTDV0005W now includes additional information. First, the amount of time that the TOD clock has not been synchronized is provided. Seconds, the three TOD clock values that were used in the compare is also provided. This added information provides an indication of how far out of synch the TOD clock is. The CTDV0005W warning message will be sent for the first five minutes after the loss of TOD synchronization is discovered. Afterwards, the message will be sent four times an hour or every 15 minutes. DEPENDENCIES SEGMENTS TO BE ASSEMBLED OR COMPILED: None. SEGMENTS TO BE LINK EDITED: ctdwh0.exe (Shipped in Tar File) COREQS: None. MIGRATION CONSIDERATIONS: None. UPDATED INFORMATION UNITS: None. See your IBM representative if you need additional information. DOWNLOAD INSTRUCTIONS: http://www.ibm.com/software/htp/tpf/pages/maint.htm
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