> > On a more serious note, I have a dump which I can format out the > system trace table with the SYSTRACE IPCS verb (subcommand). > > What I would like to know, and can't seem to find, is where the > raw data can be found in the dump. > > > Can anyone guide me in how I can access the system trace table in > its raw form. > > In other words, what known block points to another which points to > another and so on until I finally reach the system trace data.
If you are talking about an SVC dump, IEATDUMP, or SYSMDUMP, IPCS STATUS WORKSHEET will display a TTCH address. The TTCH is located in the TRACE address space (which currently happens to be ASID 4, and has been ASID 4 since MVS/ESA SP3.1.0). The TTCH is described in MVS Data Areas Volume 4. The TTCH is not a Programming Interface. We do not provide a DSECT for it, and we would feel free to incompatibly change it at any time that it is necessary and convenient for us to do so. Additional TTCHs that might happen to be still hanging around in a standalone dump (or an SVC dump where all of the TRACE address space was requested to be dumped) can be located by using IPCS SYSTRACE ALL TTCH(LIST) TIME(LOCAL), and can be formatted using IPCS SYSTRACE TTCH(X'ttchaddr'). If you are talking about the live trace buffers in a standalone dump, the PSATBVTR/PSATBVTV will point you into the TBVT chain for each CPU. The TBVTs are also virtualized in the TRACE address space, and described in MVS Data Areas Volume 4, and are not a Programming Interface. And of course, I am interested in the reason why you want to work with the raw data. Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
