CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Main CFD Forum

Performance of the P4 for CFD

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   December 7, 2000, 07:35
Default Performance of the P4 for CFD
  #1
Jens
Guest
 
Posts: n/a
Hi,

Are there anyone that have tested the new Intel Pentium 4 processor for CFD codes using Intel optimized compiler ?

The specmarks (SPECmark, fp) for the Pentium 4 processor are quite impressive !

SPECfp2000 (Base) Pentium 4 @ 1.5 Ghz: 549 AMD Athlon @1.2 Ghz: 304 Alhpa 21264B @833Mhz: 590

But what about real CFD applications in C or Fortran ?

Thanks in advance.

Regards

Jens
  Reply With Quote

Old   December 7, 2000, 22:48
Default Re: Performance of the P4 for CFD
  #2
John C. Chien
Guest
 
Posts: n/a
(1). Well, a good question. I think, you need to consider other factors such as the mother board bus, the type of memory, the hard disks, etc..and how the code was written. (2). Up to now, AMD is the choice of my son. But he is in the computer field, not in CFD. I am not quite ready for 1.5Ghz yet. But if I do decide to upgrade, I'll take AMD based on my son's suggestion.(he is mainly concern about the value or the cost.)
  Reply With Quote

Old   December 8, 2000, 03:04
Default Re: Performance of the P4 for CFD
  #3
John
Guest
 
Posts: n/a
Where do you have those values from ? I have SPECfp2000 (Base): Athlon 1.2 DDR: 308, P4 1.5GHz: 417

With PovRay as testcase: P4: 783, Athlon:960 (!!)

  Reply With Quote

Old   December 8, 2000, 09:30
Default Re: Performance of the P4 for CFD
  #4
Sebastien Perron
Guest
 
Posts: n/a
I have both a PIII @700 MGHz and a AMD Athlon at 1000MGH.

In theory The AMD Athlon should be faster than my PIII for floating point calculation.

But in reality, for large calculation, they both deliver the same speed.

From what I've read, the bandwith between the cache is larger for the PENTIUM. Plus, MY PIII has Rambus Memory. Even though the PIII processor is slower than the AMD athlon, it always has some numbers to play with. Which is not the case fot the Athlon, numbers are not brought fast enough.

Conclusion, it is worthless to have the fastest CPU if it's not fed in the appropriate way.

  Reply With Quote

Old   December 8, 2000, 17:26
Default Re: Performance of the P4 for CFD
  #5
Jens
Guest
 
Posts: n/a
Hi again

The numbers are from http://www.spec.org

Where performances numbers are listed.

Go to http://www.spec.org/osg/cpu2000/results/res2000q4/

for a list over newly released processors.

Regards

Jens

  Reply With Quote

Old   December 8, 2000, 17:28
Default Re: Performance of the P4 for CFD
  #6
Jens
Guest
 
Posts: n/a
Hi,

The specmark number are from

http://www.spec.org

And details about new processor are at:

http://www.spec.org/osg/cpu2000/results/res2000q4/

Regards

Jens
  Reply With Quote

Old   December 8, 2000, 17:33
Default But what about com. CFD codes
  #7
Jens
Guest
 
Posts: n/a
Hi,

I also think that one of the main issues are bandwidth.

BUT what about commercial CFD codes ???

They (CFD codes) are not always compile with max. optimization and they are not compiler for a specified Intel-compatible processor.

Have any one tested this ?

Regards

Jens
  Reply With Quote

Old   December 9, 2000, 03:33
Default Re: Performance of the P4 for CFD
  #8
John C. Chien
Guest
 
Posts: n/a
(1). There is an indepth review by Anand Lal Shimpi, on "Intel Pentium 4 1.4Ghz & 1.5Ghz",Nov. 20th,2000, at the website: http://www1.anandtech.com/ (2). It covers all the design aspects and comparison with AMD Athlon. (3). There are many real world programs tested, and the conclusion is interesting.
  Reply With Quote

Old   December 9, 2000, 13:47
Default Re: But what about com. CFD codes
  #9
Jan Rusås
Guest
 
Posts: n/a
Check the CFX user forum - a simple benchmark testcase with CFX4.3 have been used on different machines.

Regards Jan
  Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
parallel performance on BX900 uzawa OpenFOAM Installation on Windows, Mac and other Unsupported Platforms 3 September 5, 2011 15:52
Linux kernel performance enhancement ConnClark OpenFOAM 0 January 17, 2011 19:18
ANSYS CFX 10.0 Parallel Performance for Windows XP Saturn CFX 4 August 13, 2006 12:27
Performance of dual core AMD processors Imraan Parker FLUENT 1 September 9, 2005 08:04
CFD Performance Metrics Aldrin Wong Main CFD Forum 0 April 15, 2002 02:35


All times are GMT -4. The time now is 01:09.