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Subject: Re: Is SPEC a bad test organisation according to Hyatt?

Author: Vincent Diepeveen

Date: 12:15:11 03/01/04

Go up one level in this thread


On March 01, 2004 at 14:24:50, Robert Hyatt wrote:

>On March 01, 2004 at 14:20:41, Robert Hyatt wrote:
>
>>On March 01, 2004 at 13:59:25, Eugene Nalimov wrote:
>>
>>>On March 01, 2004 at 13:49:38, Eugene Nalimov wrote:
>>>
>>>>On March 01, 2004 at 12:05:17, Vincent Diepeveen wrote:
>>>>
>>>>>On February 29, 2004 at 23:38:31, Robert Hyatt wrote:
>>>>>
>>>>>[snip]
>>>>>
>>>>>You qualify the testresults as done for SPEC as INVALID and INCORRECT?
>>>>>
>>>>>YES or NO?
>>>>>
>>>>>[bla bla removed]
>>>>
>>>>Had you stopped to drink vodka every morning?
>>>>
>>>>Please answer only YES or NO.
>>>>
>>>>[bla bla removed]
>>>
>>>So, my previous post pointed that there are questions for which you cannot
>>>answer "YES or NO".
>>>
>>>And here is *official* SPEC data for 1.3GHz K7 and 1.5GHz Itanium2:
>>>
>>>http://www.spec.org/cpu2000/results/res2001q4/cpu2000-20011008-01018.html
>>>http://www.spec.org/cpu2000/results/res2004q1/cpu2000-20040126-02775.html
>>>
>>>Thanks,
>>>Eugene
>>
>>
>>Please do not confuse discussions with Vincent by supplying real data.  Things
>>stay on a more equal footing if you just make up stuff and post it here.
>>
>><sarcasm off>
>>
>>:)
>
>
>For those that didn't look at the data, the 1.5ghz K7 compared to the 1.5ghz
>itanium shows a 50% faster speed on the Itanium.  IE the K7 took 127 seconds to
>run the test, the Itanium took 80.
>
>Why 1.5ghz K7?  Because Vincent was talking about "clock for clock" and Eugene
>chose to supply real data rather than barking up a hollow tree...

Latest itanium compiler 1.5Ghz 6MB L3. Compiler used from 2004.
    base score : 1241
Note this is the HP compiler which hardly anyone uses. No one in government is.
They all use the way slower intel compiler. The supercomputers of the government
aren't HP ones. HP isn't delivering big enough systems.

But even then. Let's compare this 6 instructions a cycle Itanium2 with crafty at
K7 a 32 bits doing 3 instructions a cycle max:

http://www.spec.org/osg/cpu2000/results/res2003q2/cpu2000-20030505-02154.html
K7 at 2.2Ghz getting: 1324

So after concluding that itanium is hell of a lot slower than K7, we can look to
the IPC.

The 6 instructions a clock from the itanium2 @ 64 bits delivers :
  1241/1324 * 2.2Ghz/1.5Ghz = 37% faster speed

So years of work at compiler still didn't improve much from my 33% statement
that the 4 instructions a clock 21264 1Ghz delivered a few years ago.

So the move from 32 bits to 64 bits can not have contributed more than a few %
of speed to crafty.

Best regards,
Vincent






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