I looked into it, but we don't have the appropriate h/w so I can't play with it yet. The unconstrained version may always fail, so you need to always create a non-transactional version of the code just in case (so this doubles your coding effort). The only immediate use I could think of for this facility would be in STAE code to check dereferencing of potentially corrupted pointers without the overhead setting up another SPIE/STAE.
Robert -----Original Message----- From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] On Behalf Of Charles Mills Sent: Friday, March 03, 2017 09:00 To: ASSEMBLER-LIST@LISTSERV.UGA.EDU Subject: Re: Transactional Execution - anybody used it? I *considered* it for a problem of updating a queue in a multiprocessor reentrance situation. I ended up solving the problem with CSST which seemed like a simpler approach. Charles -----Original Message----- From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] On Behalf Of John McKown Sent: Friday, March 3, 2017 6:32 AM To: ASSEMBLER-LIST@LISTSERV.UGA.EDU Subject: Re: Transactional Execution - anybody used it? OK, I guess I asked my question poorly. And I should not have said anything about the PLO (instruction, not Mid-East organization) So. Has anyone on this forum actually used the TBEGIN and TEND instructions in their code? I would appreciate knowing what / why they chose to do so. I'm just trying to understand the real purpose of these instructions on a PRACTICAL level. Yes, I've read up on "Transactional Memory" on the web. And how it allows "atomic updates". But I would like a real world example of why use this vs. the older "atomic" instructions (TSET, CS, CDS, PLO, etc). CSC - This is a PRIVATE message - If you are not the intended recipient, please delete without copying and kindly advise us by e-mail of the mistake in delivery. NOTE: Regardless of content, this e-mail shall not operate to bind the Company to any order or other contract unless pursuant to explicit written agreement or government initiative expressly permitting the use of e-mail for such purpose.
