Re: SIIS "issue" after upgrade to z13 machine.

2016-11-13 Thread Philippe Cloarec
Hi Pieter, Yes I did figure out that to use of MF=E/L or SF=E/L will help to avoid the SIIS scenario for IBM Macros. Thx much for your input have a good day Philippe

Re: SIIS "issue" after upgrade to z13 machine.

2016-11-13 Thread Pieter Wiid
uot; after upgrade to z13 machine. Hi John, Thx much for your input. Yes, I was planning to use newer instructions but I did realize seeing current design of the applications I am reviewing this will generate some extra needed time to be sure all is ok and I cannot afford this in current co

Re: SIIS "issue" after upgrade to z13 machine.

2016-11-13 Thread Philippe Cloarec
Hi John, Thx much for your input. Yes, I was planning to use newer instructions but I did realize seeing current design of the applications I am reviewing this will generate some extra needed time to be sure all is ok and I cannot afford this in current context. To implement Baseless pgm or

Re: SIIS "issue" after upgrade to z13 machine.

2016-11-13 Thread John Dravnieks
) From: Philippe Cloarec To: ASSEMBLER-LIST@LISTSERV.UGA.EDU Date: 12/11/2016 21:16 Subject:Re: SIIS "issue" after upgrade to z13 machine. Sent by:IBM Mainframe Assembler List Hi Martin and Rob, First thx much for your input. Here are 3 links which

Re: SIIS "issue" after upgrade to z13 machine.

2016-11-12 Thread Philippe Cloarec
Apparently this is needed for some...sure SIIS is NOT new for sure, BUT performance issue was obviously revealed after upgrade to a z13, please do read documents referenced in previous updates. Have a good evening.

Re: SIIS "issue" after upgrade to z13 machine.

2016-11-12 Thread Gibney, Dave
ASSEMBLER-LIST@LISTSERV.UGA.EDU > Subject: Re: SIIS "issue" after upgrade to z13 machine. > > Hi Rob and Martin, > Thx for your input. MY primary purpose is to detect SIIS scenarios across > code I have to scan and to fix them. Code is not complicated I mean you do >

Re: SIIS "issue" after upgrade to z13 machine.

2016-11-12 Thread Philippe Cloarec
Hi Rob and Martin, Thx for your input. MY primary purpose is to detect SIIS scenarios across code I have to scan and to fix them. Code is not complicated I mean you do have basic i/o processing against files and some characters and numerics fields are processed. There are some Ex(ecute) instr

Re: SIIS "issue" after upgrade to z13 machine.

2016-11-12 Thread Rob van der Heij
On 12 November 2016 at 10:10, Philippe Cloarec wrote: > > Since we do talk of CPU cycles savings here I will check for AGI cases and > their resolution and try to implement instruction grouping as much I can. > > From my humble point this is a real topic and all z13 sites having old > productions

Re: SIIS "issue" after upgrade to z13 machine.

2016-11-12 Thread Martin Truebner
Pieter, >> The would change most branch instructions to relative branches. I say not "most" but "all". Here is a construct that IEABRC (or its X brother) does not handle well B *+4*NUMACONS DC AL4(SOMEWHERE) DC AL4(OVER_THE_RAINBOW) . . but these are rare and e

Re: SIIS "issue" after upgrade to z13 machine.

2016-11-12 Thread Pieter Wiid
Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] On Behalf Of Philippe Cloarec Sent: 12 November 2016 11:10 To: ASSEMBLER-LIST@LISTSERV.UGA.EDU Subject: Re: SIIS "issue" after upgrade to z13 machine. Hi Martin and Rob, First thx much for your input. Here are 3 links wh

Re: SIIS "issue" after upgrade to z13 machine.

2016-11-12 Thread Philippe Cloarec
Hi Martin and Rob, First thx much for your input. Here are 3 links which relate the "issue" and common code for which we fall into a SIIS scenario: https://www.google.fr/#q=istream_flash_062606_v4 http://s3-us-west-1.amazonaws.com/watsonwalker/ww/wp-content/uploads/2016/03/06173415/18017-The-Ch

Re: SIIS "issue" after upgrade to z13 machine.

2016-11-12 Thread Martin Truebner
Rob, excellent example that would be obvious when converting to "baseless" (and eliminated to be performance-perfect even without going to RENT) Martin

Re: SIIS "issue" after upgrade to z13 machine.

2016-11-11 Thread Martin Truebner
Philippe, >> ... no time to rewrite them as RENT. Well - if this is the case then i would not invest into using newer instructions (with the exception of the fairly old "relative & immediate" instructions) You need to understand the code to replace instruction sequences. To make code RENT is f

Re: SIIS "issue" after upgrade to z13 machine.

2016-11-11 Thread Rob van der Heij
The example that I have seen was where the customer had a linkage model for small subroutines that used a static save area and local storage after a branch at the start of the program. That's painful for small routines because a lot of the code is in the same cache line and gets hit each time you s

SIIS "issue" after upgrade to z13 machine.

2016-11-11 Thread Philippe Cloarec
Hi, As you may know, there is some kind of performance issue because of SIIS(Store Into Instruction Stream) after upgrade to a z13 machine in some scenarios. CPU increase of 30% can be seen in some case, so it may be good to perform to related changes to avoid issue from reoccuring. Did start