GTF ENQ/DEQ SVC Trace for SYSZVOLS and SYSDSN on z/OS V1.12

[Minoru Massaki]

Hello there,

I took GTF ENQ/DEQ SVC Trace, but there was no SYSZVOLS/SYSDSN trace
entry in IPCS print output even though D GRS,C indicated there were
resource contentions for SYSZVOLS and SYSDSN. (Other ENQ/DEQ entries
were printed)

GTF Trace parameters are following. (SVC48: DEQ, SVC56:ENQ)

TRACE=SSCHP,IOP,CCWP,SVCP
SSCH=IO=(5F0)
SVC=(19,20,31,35,37,48,56)
CCW=(SI,CCWN=512,DATA=128,IOSB)

I took same GTF SVC trace on old z/OS V1.7 system.
There were many SYSZVOLS, SYSDSN trace entries in IPCS print output.

How can I trece SYSZVOLS/SYSDSN ENQ/DEQ activities in z/OS V1.12.

Is this bug or some code changes SVC trace for ENQ/DEQ?

Your help would be appreciated.
--

全先　実 - Minoru Massaki (M*M)
E-mail: mmas...@gmail.com

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[Jim Mulder]

> I took GTF ENQ/DEQ SVC Trace, but there was no SYSZVOLS/SYSDSN trace
> entry in IPCS print output even though D GRS,C indicated there were
> resource contentions for SYSZVOLS and SYSDSN. (Other ENQ/DEQ entries
> were printed)
>
> GTF Trace parameters are following. (SVC48: DEQ, SVC56:ENQ)
>
> TRACE=SSCHP,IOP,CCWP,SVCP
> SSCH=IO=(5F0)
> SVC=(19,20,31,35,37,48,56)
> CCW=(SI,CCWN=512,DATA=128,IOSB)
>
> I took same GTF SVC trace on old z/OS V1.7 system.
> There were many SYSZVOLS, SYSDSN trace entries in IPCS print output.
>
> How can I trece SYSZVOLS/SYSDSN ENQ/DEQ activities in z/OS V1.12.
>
> Is this bug or some code changes SVC trace for ENQ/DEQ?

Probably some code changed to use ISGENQ instead of ENQ/DEQ.
ISGENQ uses PC interface into GRS, so it is not traceable
via a GTF SVC trace. A SYSGRS component trace, using
the REQUEST0 and REQUEST1 options, might provide the tracing you
desire.

Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY

[Minoru Massaki]

Hi Mulder-san,

Thank you very much for your information.

The code change had been made in z/OS V1.10.
After that release, we cannot trace ENQ/DEQ by GTF SVC trace.

I'm going to try to trace it by component trace you suggested.

Again, thank you a lot.


Minoru Massaki (M*M)


2012/11/13 Jim Mulder <d10...@us.ibm.com>:

--

全先　実 - Minoru Massaki (M*M)
E-mail: mmas...@gmail.com