If you have full speed processor then you can have ...more processors.
Let's not talk about models with all 170 processors activated and in use ;-)
However Len suggested the full speed processor can have some hidden
capacity. Well, maybe it has, but there is no evidence for such approach.
--
Radoslaw Skorupka
Lodz, Poland
W dniu 2018-01-11 o 05:33, Mike Schwab pisze:
Unless you bought full speed processor, yes there is room for
improvement. But the waits for data count toward your reduce CPU
costs. I.E. a full speed CPU sees delays due to waiting, versus a
slower processor counts those delays toward the reduced CPU speed.
On Wed, Jan 10, 2018 at 9:34 PM, Rugen, Len <rug...@missouri.edu> wrote:
I wonder if the microcode has a little "detuning" so that if they ever have to
make patches that would slow down the system, they can remove a little of the detuning to
get back to base performance.
Len Rugen
University of Missouri
Division of Information Technology
Systems & Operations - Metrics & Automation Team
________________________________
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of Mike
Schwab <mike.a.sch...@gmail.com>
Sent: Wednesday, January 10, 2018 8:55:07 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: System z & Meltdown/Spectre
Yep. I know my site didn't purchase upgrades until running at 100%
all weekday long would slow down batch runs by 4X elapsed time
compared to 90%.
On Wed, Jan 10, 2018 at 1:15 PM, Pommier, Rex <rpomm...@sfgmembers.com> wrote:
Gil,
I don't think this one is necessarily a quality issue. As widespread as the
problem is, it appears to me to be more of a huuuge oversight. That said, you
are correct in that we don't know what IBM plans to do, or for that matter,
even how much of an impact fixing this will be on performance of z/OS. My
concern is that since we (as well as probably many of the sites on this board)
are bumping against our cap and if we get hit by even a 10% reduction in
thruput from this, we're in danger of missing SLAs and other fun TLAs.
Rex
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Paul Gilmartin
Sent: Wednesday, January 10, 2018 11:52 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: System z & Meltdown/Spectre
On Wed, 10 Jan 2018 17:31:37 +0000, Pommier, Rex wrote:
And what does "a significant CPU hit" mean for those of us who's 4HRA is
already at the top of our machine's capacity? That's where my concern is. Yeah, the
money for increasing MSUs is gonna stink, but missing SLAs due to the box no longer being
big enough is going to really bite.
There's a cynical suspicion that when a vendor sees defect repair as a profit
center
it provides a disincentive to quality.
This might go a step beyond: "We did it wrong, so we'll raise the price to make it
right."
In fairness, we don't know what IBM plans to do.
-- gil
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
The information contained in this message is confidential, protected from
disclosure and may be legally privileged. If the reader of this message is not
the intended recipient or an employee or agent responsible for delivering this
message to the intended recipient, you are hereby notified that any disclosure,
distribution, copying, or any action taken or action omitted in reliance on it,
is strictly prohibited and may be unlawful. If you have received this
communication in error, please notify us immediately by replying to this
message and destroy the material in its entirety, whether in electronic or hard
copy format. Thank you.
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
--
======================================================================
--
Treść tej wiadomości może zawierać informacje prawnie chronione Banku
przeznaczone wyłącznie do użytku służbowego adresata. Odbiorcą może być jedynie
jej adresat z wyłączeniem dostępu osób trzecich. Jeżeli nie jesteś adresatem
niniejszej wiadomości lub pracownikiem upoważnionym do jej przekazania
adresatowi, informujemy, że jej rozpowszechnianie, kopiowanie, rozprowadzanie
lub inne działanie o podobnym charakterze jest prawnie zabronione i może być
karalne. Jeżeli otrzymałeś tę wiadomość omyłkowo, prosimy niezwłocznie
zawiadomić nadawcę wysyłając odpowiedź oraz trwale usunąć tę wiadomość
włączając w to wszelkie jej kopie wydrukowane lub zapisane na dysku.
This e-mail may contain legally privileged information of the Bank and is
intended solely for business use of the addressee. This e-mail may only be
received by the addressee and may not be disclosed to any third parties. If you
are not the intended addressee of this e-mail or the employee authorized to
forward it to the addressee, be advised that any dissemination, copying,
distribution or any other similar activity is legally prohibited and may be
punishable. If you received this e-mail by mistake please advise the sender
immediately by using the reply facility in your e-mail software and delete
permanently this e-mail including any copies of it either printed or saved to
hard drive.
mBank S.A. z siedzibą w Warszawie, ul. Senatorska 18, 00-950 Warszawa,
www.mBank.pl, e-mail: kont...@mbank.plsąd Rejonowy dla m. st. Warszawy XII
Wydział Gospodarczy Krajowego Rejestru Sądowego, nr rejestru przedsiębiorców
KRS 0000025237, NIP: 526-021-50-88. Według stanu na dzień 01.01.2016 r. kapitał
zakładowy mBanku S.A. (w całości wpłacony) wynosi 168.955.696 złotych.
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
