Lahey Support
08-15-2003, 01:33 AM
Hi Klaus,
There is Processor Comparisons on Win32 Compilers in Polyhedron Software
homepage( http://www.polyhedron.co.uk/), but they did for PIII and Athlon
850 MHz.
toppo
----- Original Message -----
From: "Klaus Bigalke" [address removed]
To: "Michael Milgram" [address removed] [address removed]
Sent: Tuesday, September 04, 2001 5:12 PM
Subject: Re: [LF] AMD Athlon vs. Intel P4?
> Hi Michael,
>
> thanks for your tests.
> > Perfect agreement (to the last digit) with approved answers on both
> > machines.
> With a Monte Carlo code I would expect that there at least COULD be
> differences, not only between runs on different hardware systems but also
> between two runs on the same system, because you are working with
> random numbers. Very fine that this is not the case.
>
> > if it is possible to wrap up the executable and the offending input file
> > into a simple package that I could try on some of the test machines I
have
> > here, I'd be very interested, and would try and get trial access to a
P-4
> > for a test.
>
> Thanks for your offer to run my code on your systems. My problem is, that
> I've hardly the time to prepare the code and input files or to do my own
> tests
> within the next weeks (several deadlines for deliverables and project
> reports
> in September...). I suggest to do this in October, if you agree.
>
> > Otherwise, could you please keep us informed - I'd like to know what you
> > find, since I am on the verge of buying my first AMD machine, but with
> some
> > trepidation.
> I've been running an AMD Athlon 800 MHz without any problems
> for 1 1/2 years now. In January I bought a new Athlon 1200 MHz systems
> which runs well for four month. Then it "started to hang" in intervals
> between
> some minutes and some hours - worthless for simulation runs over
> some days! Some repairs and hardware upgrades - and now I have a
> system with 1333 MHz (133 MHz FSB, AK12 board) which still "hangs"
> twice a day. I decided to give it back to the trader and to change to the
> good old Intel system.
> By the way, benchmark tests in several journals say that Athlon/1333MHz
> and P4/1700MHz systems are nearly identical in speed. May be this is the
> case for office applications, games, and so on. My experience with
> my simulation model (FORTRAN code, Lf95 compiler) is that the
> P4/1800MHz system performs by about a factor 2 better than the
> Athlon/1200 MHz system:
> System CPU time
> Athlon 800MHz 100 %
> Athlon 1200 MHz ~ 70%
> P4 1800 MHz ~ 32%
>
> It seems that the standard benchmarks say nothing about the performance
> of our typical applications. So I'm really lucky that I decided to give
the
> Athlon system back to the trader and to try Intel again!
> Though I have to find out the reason for the differences in the simulation
> results...
>
> Klaus
>
> METCON Umweltmeteorologische Beratung Dr. Klaus Bigalke
> Jappopweg 9h, D-25421 Pinneberg
> Tel. 04101/6938-56 Fax: 04101/6938-57 Mobil: 0171/6249543
> Email: [address removed] Web: www.metcon-umb.de
>
>
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> unsubscribe fortran
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>
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There is Processor Comparisons on Win32 Compilers in Polyhedron Software
homepage( http://www.polyhedron.co.uk/), but they did for PIII and Athlon
850 MHz.
toppo
----- Original Message -----
From: "Klaus Bigalke" [address removed]
To: "Michael Milgram" [address removed] [address removed]
Sent: Tuesday, September 04, 2001 5:12 PM
Subject: Re: [LF] AMD Athlon vs. Intel P4?
> Hi Michael,
>
> thanks for your tests.
> > Perfect agreement (to the last digit) with approved answers on both
> > machines.
> With a Monte Carlo code I would expect that there at least COULD be
> differences, not only between runs on different hardware systems but also
> between two runs on the same system, because you are working with
> random numbers. Very fine that this is not the case.
>
> > if it is possible to wrap up the executable and the offending input file
> > into a simple package that I could try on some of the test machines I
have
> > here, I'd be very interested, and would try and get trial access to a
P-4
> > for a test.
>
> Thanks for your offer to run my code on your systems. My problem is, that
> I've hardly the time to prepare the code and input files or to do my own
> tests
> within the next weeks (several deadlines for deliverables and project
> reports
> in September...). I suggest to do this in October, if you agree.
>
> > Otherwise, could you please keep us informed - I'd like to know what you
> > find, since I am on the verge of buying my first AMD machine, but with
> some
> > trepidation.
> I've been running an AMD Athlon 800 MHz without any problems
> for 1 1/2 years now. In January I bought a new Athlon 1200 MHz systems
> which runs well for four month. Then it "started to hang" in intervals
> between
> some minutes and some hours - worthless for simulation runs over
> some days! Some repairs and hardware upgrades - and now I have a
> system with 1333 MHz (133 MHz FSB, AK12 board) which still "hangs"
> twice a day. I decided to give it back to the trader and to change to the
> good old Intel system.
> By the way, benchmark tests in several journals say that Athlon/1333MHz
> and P4/1700MHz systems are nearly identical in speed. May be this is the
> case for office applications, games, and so on. My experience with
> my simulation model (FORTRAN code, Lf95 compiler) is that the
> P4/1800MHz system performs by about a factor 2 better than the
> Athlon/1200 MHz system:
> System CPU time
> Athlon 800MHz 100 %
> Athlon 1200 MHz ~ 70%
> P4 1800 MHz ~ 32%
>
> It seems that the standard benchmarks say nothing about the performance
> of our typical applications. So I'm really lucky that I decided to give
the
> Athlon system back to the trader and to try Intel again!
> Though I have to find out the reason for the differences in the simulation
> results...
>
> Klaus
>
> METCON Umweltmeteorologische Beratung Dr. Klaus Bigalke
> Jappopweg 9h, D-25421 Pinneberg
> Tel. 04101/6938-56 Fax: 04101/6938-57 Mobil: 0171/6249543
> Email: [address removed] Web: www.metcon-umb.de
>
>
> ----------------------------------------------------------
> To unsubscribe, send to [address removed] the following
> as the first and only line of the message body:
> unsubscribe fortran
> ----------------------------------------------------------
>
----------------------------------------------------------
To unsubscribe, send to [address removed] the following
as the first and only line of the message body:
unsubscribe fortran
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