Hi
I'd like to add here neither MIPS nor Ghz are a good indicator of
performance.
Example on the Intel side
Pentium 955 (dual core, 3.3 Ghz) is outperformed by a Pentium E6300 at 1.8
Ghz (again dual core)
Why, the New E6300 being a Duo Core Processor has reduced the pipeline
from like 32 level down to 14 I think
the improvement in performance though at almost have the Freq of the older
dual core is due to more efficient pipelining
Something IBM learned along time ago, Freq is even more meaningless than
MIPS.
There is no magical formula here. z9's are much better at some workload,
Intel is better at others.
I have tried to stay away from this when talking to our Distributed people.
the whole mine is better than yours
instead we've concentrated on who's better for the job and we're getting
somewhere now. they clearly see that web serving and application serving is
fantastic on a z9,
composing 20million statements a night is better on Intel (though we still
do it on a z9, proximity to the data and all)
FWIW: One benchmark program put the z9 IFL at 1.7Ghz but cautions take it
with a grain of salt
William 'Doug' Carroll
barton
<[EMAIL PROTECTED]
ity-software.com> To
Sent by: Linux on [email protected]
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<[EMAIL PROTECTED]
IST.EDU> Subject
Re: 1 480 MIP IFL CPU = ?
01/31/2007 12:13
PM
Please respond to
Linux on 390 Port
<[EMAIL PROTECTED]
IST.EDU>
Instructions and architecture matter. I'd put a z9 closer to
2.5Ghz than 1.7 in comparing linux workloads.... A 2Ghz intel
will NEVER outperform a z9.
>>
>>Well, according to this article " Design methods for attaining IBM
>>System z9 processor cycle-time goals"
>>(http://www.research.ibm.com/journal/rd/511/mayer.html), the
>>cycle time
>>of the new z9 processor chip is 1.7 GHz. So, based on these numbers
>>alone, a 2GHz. Pentium would outperform a z9 processor chip
>>by a factor
>>of: 2.0/1.7 = 1.1765.....;-)
>>
>>Of course, this isn't very useful since we do not take into
>>account the
>>differences in system architecture (RISC v. CISC, etc.) and design
>>(number of processors, memory access, etc.). But at least you can tell
>>your management that the processors in your new z9 are as fast as the
>>processors in their desktop PCs......;-)
>>
>>Have a good one.
>>
>>DJ
>
>
>
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