In <[EMAIL PROTECTED]>, on 06/09/2005
at 11:14 AM, Bill Fairchild <[EMAIL PROTECTED]> said:
>Doesn't the Catalog Address Space get involved because of a PC from
>JES2?
Yes.
>Wouldn't the TCB in the primary address space get charged for the
>time?
No. The issuing TCB would be charged for time spent in the issuing
TCB; it would not be charged for time spent in another address space
unless there is enclave processing for the CAS. I assume that a good
chunk of the work done by CAS is an TCB mode, e.g., DYNALLOC, OPEN.
>And don't forget that CAS may also PC into VLF to suck its catalog
>blocks out of cached catalog storage so as to avoid I/O if
>possible.
Yep; multiple address spaces might be involved for the single request,
and each would rack up CPU time separately.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO
Search the archives at http://bama.ua.edu/archives/ibm-main.html
