| Re: A few IDL benchmarck results - question [message #27407 is a reply to message #27340] |
Sun, 21 October 2001 11:20  |
Robert Stockwell
Messages: 74
Registered: October 2001
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Member |
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Interesting.
I can also post some numbers from the different computers I use.
But I have a question.
I have a laptop with 1.2 Ghz Pentium, 512M ram running win2000.
I compared it to an Athlon 1.4 ghz , 512M ram desktop running Redhat 7.0.
Both run IDL 5.4, and execute identical code. No graphics, other than
printing a line about every 5 seconds. It is all floating point
calculations.
Disk access neglibable, and entire process takes about 80 M of ram.
The weird thing is that my 1.2G laptop is a little quicker than the 1.4G
desktop,
in spite of the fact that my sys guy guaranteed that the athlon is screaming
fast
on FP operations (faster than a 1.8Ghz pentium).
An iteration on the 1.2G takes 24 minutes, on the 1.4G it takes 27 minutes.
I was expecting the 1.4G to take about 14 minutes (having been told
how fast the athlon is as compared to a pentium).
Also, time_test2 takes 1.6 seconds on the 1.2Ghz laptop,
and a little over two full seconds on the 1.4Ghz desktop.
So here's the question, is IDL and/or win2000 optimized for a pentium chip?
Why is it so fast?
I do know that the IDLDE is way way better on win2000 than on linux, so are
there compiler optimizations in IDL that only exist on win2000?
Cheers,
bob
PS I don't know if this is relevant, but on the 1.4Ghz linuz box, I pull IDL
over
from another computer to run it on mine. I can't see how that makes a
difference
though since it should be sitting in ram.
K. Bowman <k-bowman@null.tamu.edu> wrote in message
news:181020011253237910%k-bowman@null.tamu.edu...
> Here are a few results from an IDL code I use for benchmarks. It is a
....
> System Clock CPU OS version Time (s)
> ----------- ------- ------ ---------------------------- --------
> Alpha DS20 667 MHz 21264 Tru64 UNIX V5.0A (Rev. 1094) 37
> Powermac G4 867 Mhz PPC G4 Mac OS 9.2 under Mac OS X 58
> Powermac G4 500 MHz PPC G4 Mac OS 9.1 77
> Powerbook G4 400 Mhz PPC G4 Mac OS 9.1 90
> Alpha 500au 21164? Digital Unix V4.0 878 108
> SGI O2000 180 MHz? IRIX 6.5 IP27 136
> SGI O200 180 MHz? IRIX 6.5 IP27 150
> SGI O2 IRIX 6.3 IP32 328
...
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