> On 2/26/2012 1:08 PM, Micheal Butz wrote:
>> Are these created by Z/OS or by the user or both

I suspect that Michael was asking whether TQE's themselves are created by 
zOS or by the user or both, rather than whether STIMER was issued within a 
system service that a user might invoke. 

TQEs are created by users for DIE routines (see "Establishing a timer 
disabled interrupt exit" in the authorized assembler services guide). They 
are also created by z/OS. 

One way to get a hint of who does what is that IHATQE has fields that are 
programming interfaces but TCBTQE is not a programming interface. If a 
user were supposed to queue a TQE to TCBTQE, then TCBTQE would be a 
programming interface. That's not to say that the interface information is 
free from error, but it's a place to start.

A scan of the z/OS MVS bookshelf for "TQE" locates the information. I 
suggest that a simple search is a good place to start before posting some 
questions unless you feel that the broader list would benefit from seeing 
the answer.  It is particularly when you can't (reasonably easily) find 
information that the many learned participants (customer, ISV, and IBM) on 
this forum enjoy helping.

Peter Relson
z/OS Core Technology Design

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