/MartinPacker
From:
Jon Butler butl...@us.ibm.com
To:
IBM-MAIN@listserv.ua.edu,
Date:
07/24/2012 07:24 PM
Subject:
Re: Help with elementary CPU speed question
Sent by:
IBM Mainframe Discussion List IBM-MAIN@listserv.ua.edu
There was a 3090-180J uni that was rated at 23.5. The 3090-300J (3+3
Mike Ward writes:
This is one area where I really have a problem. It used to be
back in the 370 days that if a machine was rated at 50 mips and
you moved up to 100 mips you really noticed the difference in
execution time I know I'm on a rant
Was there even a 100 MIPS uniprocessor model in
This is one area where I really have a problem. It used to be back in the 370
days that if a machine was rated at 50 mips and you moved up to 100 mips you
really noticed the difference in execution time. Today if you have a 100 mip
machine (I know they're rated at msu's not mips) and you moved
mw...@ssfcu.org (Ward, Mike S) writes:
This is one area where I really have a problem. It used to be back in
the 370 days that if a machine was rated at 50 mips and you moved up
to 100 mips you really noticed the difference in execution time. Today
if you have a 100 mip machine (I know they're
, 2012 11:44 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Help with elementary CPU speed question
mw...@ssfcu.org (Ward, Mike S) writes:
This is one area where I really have a problem. It used to be back in
the 370 days that if a machine was rated at 50 mips and you moved up
to 100 mips you really
: Help with elementary CPU speed question
On Wed, 18 Jul 2012 18:47:13 -0400, Dave Barry wrote:
In theory, you divide the rated SU/second by the number of processors
giving SUs/processor/second, adjusting for MP effect overhead.
No, the SU/second is called the SRM constant and it is used to convert
In
985915eee6984740ae93f8495c624c6c21e5c49...@jscpcwexmaa1.bsg.ad.adp.com,
on 07/17/2012
at 12:04 PM, Farley, Peter x23353 peter.far...@broadridge.com
said:
t SHOULD NOT be necessary to have considerable statistical prowess
or have access to DCOLLECT output (which most normal application
Another problem with Peter Farley's formulation of this issue is his
use of the phrase normally skilled professional application
programmer. The question just what skills such a person should have
is controversial. The question what skills they do in fact usually
have is less so.
A great figure
Short answer: most likely not.
Slightly longer answer: although all CPU's wait at the same speed, they vary in
most everything else.
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Charles Mills
Sent: Tuesday, July 17, 2012
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Help with elementary CPU speed question
As has been pointed out, there are many IBM tools such as zPCR that you can
download to help with this exercise. The tools require either a good estimate
or RMF data from the LPARs to give you an accurate
Steve Finch
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf
Of Charles Mills
Sent: Wednesday, July 18, 2012 2:46 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Help with elementary CPU speed question
Jon, thanks for the thoughtful reply
Steve
For my sins, I started work in an industrial research laboratory.
One time the laboratory was having some sort of open day[1] and one of my
colleagues had a printed card announcing the rate of migration of chlorine ions
through magnetite which must have had some bearing upon the
Charles
How many It depends.. answers do you want? :-)
If all the program does is increment a register in a tight loop then I would
imagine that your assumption would be roughly OK. If it does anything more
complicated (eg open a dataset, maybe call a system routine, DB2 subsystem,
XCF
Rob Scott has pointed you in the right direction.
Worth emphasizing is that CP-SU ratios are most useful for botionally
'scientific' , CP-intensive applications.
Many 'business' applications are I/O-bound, some of them--MFUs are the
classic example--to the extent that shrinking CP processing to
Lizette, thanks, you're always helpful. Answers in line below.
Charles
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On
Behalf Of Lizette Koehler
Sent: Tuesday, July 17, 2012 7:59 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Help with elementary
17, 2012 11:36 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Help with elementary CPU speed question
Rob Scott has pointed you in the right direction.
Worth emphasizing is that CP-SU ratios are most useful for botionally
'scientific' , CP-intensive applications.
Many 'business' applications are I
.
Charles
-Original Message-
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On
Behalf Of John Gilmore
Sent: Tuesday, July 17, 2012 8:36 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Help with elementary CPU speed question
Rob Scott has pointed you in the right direction
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