OUCB usage
Hi, The OUCB control Block seems to contain information about Virtual storage swapping. Would anybody know if that's per page Of Virtual Storage, meaning ASCBOUCB-OUCB-VITUALSTORAGE PAGE IN THAT AS While if I were to issue a SYSEVENT DONTSWAP macro All pages of Virtual Storage in that address would be swapped in Thanks -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: OUCB usage
On Sun, 18 Sep 2011 08:47:10 -0400 Micheal Butz michealb...@optonline.net wrote: :The OUCB control Block seems to contain information about Virtual storage :swapping. :Would anybody know if that's per page Of Virtual Storage, meaning :ASCBOUCB-OUCB-VITUALSTORAGE PAGE IN THAT AS Do't know. :While if I were to issue a SYSEVENT DONTSWAP macro :All pages of Virtual Storage in that address would be swapped in Pages may not be paged in. Swapped is more of an address space attribute. -- Binyamin Dissen bdis...@dissensoftware.com http://www.dissensoftware.com Director, Dissen Software, Bar Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: CCW Trace
CCWDISPL REXX EXEC described in MVS Update #136, January 1998, might be useful to do reduction of GTF CCW DASD trace. The MVS update PDF file is in CBT Tape site and its URL is following. http://www.cbttape.org/xephon/xephonm/mvs9801.pdf Title of the CCWDISPL is Interpreting GTF CCW trace entries and is in page 40. I hope that this might help you. Minoru Massaki (M*M) 2011/9/15 Staller, Allan allan.stal...@kbmg.com: I have a DASD volume with very high activity and will be running a CCW trace to gather diagnostic info. I have all the info I need to run the trace. Does anyone have (or can you point me to) the CCW trace reduction program. This was a program (basically PROC FREQ) that reduced the target address of the seeks, and converted them to an easily readable format. Does anyone have (or can you point me to) the CCW trace reduction program. IBM had it many moons ago and distributed it with fair regularity. No $$$ for new tools. I suppose I can re-write it if push comes to shove. Thanks in advance, -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- 全先 実 - Minoru Massaki (M*M) E-mail: mmass...@gmail.com -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: OUCB usage
Eric Jackson jh...@ca.rr.com writes: For MVS, unlike most other platforms, the terms swapping and paging refer to distinct operations. Paging is for a page of memory in an address space, and swapping is when the entire address space is swapped out to secondary storage. TSO address spaces waiting for terminal I/O (for example) will get swapped out so that their memory resources become available to other address spaces while waiting the relatively long time for terminal input. If you issue a DONTSWAP, paging still continues for your address space. changes i made for cp67 (as undergraudate in the 60s) .. and since the changes were mostly dropped in the simplification in the morph of cp67-vm370 ... re-implemented for vm370 in the 70s ... was pages were individually paged ... and at queue drop (for long wait) ... virtual pages might be collected ... but nothing actually happened unless there was sufficient demand for pages (aka agile, dynamic adaptive). circa 1980, somebody from the mvs organization contacted me about recent change that had been to MVS, regarding not actually swapping pages unless actually needed ... and they wanted to know about making similar change to vm370. I commented, that it had never occured to me to not do it that way ... dating back to when i did the original implementation in the 60s. I actually had earlier arguments with the organization when they were first adding virtual memory to os/360 ... for svs and then mvs. misc. past posts mentioning paging, swapping, page replace algorithms, etc http://www.garlic.com/~lynn/subtopic.html#clock -- virtualization experience starting Jan1968, online at home since Mar1970 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: OUCB usage
In 010d01cc7601$15190d70$3f4b2850$@net, on 09/18/2011 at 08:47 AM, Micheal Butz michealb...@optonline.net said: All pages of Virtual Storage in that address would be swapped in No. -- 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 lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
