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- From: sysgaertner@cygnus.frm.maschinenbau.th-darmstadt.de (M. Gaertner, FRM, TH Darmstadt, Germany)
- Newsgroups: vmsnet.internals
- Subject: OPCOM-Mailbox UCB-question
- Date: 11 Jan 1993 08:30:24 GMT
- Organization: Fachbereichsrechner Maschinenbau, TH Darmstadt, Germany
- Lines: 34
- Message-ID: <1irb70INNml1@rs2.hrz.th-darmstadt.de>
- Reply-To: sysgaertner@cygnus.frm.maschinenbau.th-darmstadt.de
- NNTP-Posting-Host: cygnus.frm.maschinenbau.th-darmstadt.de
-
- Hi everybody,
- I'm a bit pussled with some data out of my system, but it might be, that I'm
- completely off track with that...
- Ok, let's see. I have VMS 5.5-2 on my system and i try some tricks with the
- OPCOM-process.
- This time I'd like to fiddle with it's UCB.
- The UCB's address, according to the internals book is stored in SYS$AR_OPCMBX.
- Formatting the data there shows indeed the uCB of MBA2, thus the OPCOM-mbx.
- Well, but... according to the internals book, there should always be a read-
- request pending with an read-attention ast. Thus, the UCB-fields UCB$L_IRP
- and UCB$L_MB_R_AST must not be zero. Even the UCB$V_BSY should be set (I
- might be wrong here!).
- But the data shows me an empty IRP-list, no read-attention AST, no
- write-attention AST and an idle UCB, the mbx is online...
- So my question is, where is that read-request from OPCOM ????
- But, again, I might be completely wrong with my interpretation of the
- internals book :-)
-
- BTW, another little thing, why are the fields PHD$L_WSEXTENT and
- PHD$L_WSQUOTA (the process extent quota and process quota fields, I
- might misspell the names) always showing 104 pages more than the
- UAF-entry allowes for the process ?
- This happens on VMS5.5-1 as well and on very different machines (uVAX II
- versus 8600 and 6310).
- Please give me some light and thank you for that.
-
-
- -----------------------------------------------------------------------------
-
- M. Gaertner
- TH Darmstadt, W. Germany
- Rechnergruppe FB 16-Maschinenbau
- SYSGAERTNER@CYGNUS.FRM.MASCHINENBAU.TH-DARMSTADT.DE
- Phone: Germany, (0)6151/16 5145
-