| Re: IDL and 64bit Linux [message #40551] |
Thu, 19 August 2004 11:29  |
K. Bowman
Messages: 330
Registered: May 2000
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Senior Member |
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In article <pan.2004.08.19.17.02.12.496874@as.arizona.edu>,
JD Smith <jdsmith@as.arizona.edu> wrote:
> I've heard lots of rumbling about getting a 64bit IDL for linux, which
> could address some rather large chunks of memory, and perform long64
> integer arithmetic at healthy speeds. Anyone have use for fast 64bit
> integer arithmetic? Do 64-bit doubles ("double doubles") have any
> appeal to anyone?
What I really want is 1) large files and 2) large memory address space.
64-bit floats are generally fine for my needs. Of course, efficient
64-bit integer arithmetic would be needed for address and index
calculations.
Ken Bowman
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| Re: IDL and 64bit Linux [message #40552 is a reply to message #40551] |
Thu, 19 August 2004 10:02  |
JD Smith
Messages: 850
Registered: December 1999
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Senior Member |
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On Thu, 19 Aug 2004 09:19:44 +0100, Nigel Wade wrote:
> We are in the process of finding a replacement for our ageing Origin 2000
> system. One absolute requirement is that it be able to run IDL.
>
> We are looking at SMP systems and 2 likely contenders are the Sun Fire
> V40z (hopefully an 8 processor version will be available sometime) and the
> sgi Altix 350. The Sun Fire uses Opteron and the Altix Itanium 2, neither
> of which is supported by IDL.
>
> I've mailed RSInc to ask them if they are likely to include support for
> either on Linux in the near future, but so far I've not received any reply
> at all.
>
> So, I'm hoping that someone here might have tried IDL on one of these
> platforms, to test the water, and can tell me whether it runs, and if so,
> how well it performs against a 32bit processor (I'm concerned that the
> Itanium has no native 32bit capability and may run IDL very slowly in
> 32bit emulation, the Opteron is very much an unknown quantity).
See:
http://www.rsinc.com/services/techtip.asp?ttid=3635#current
Relevant quote: "An announcement as to availability (post-IDL 6.1) [of
64-bit IDL for Linux] will be forthcoming following further
investigation."
I've heard lots of rumbling about getting a 64bit IDL for linux, which
could address some rather large chunks of memory, and perform long64
integer arithmetic at healthy speeds. Anyone have use for fast 64bit
integer arithmetic? Do 64-bit doubles ("double doubles") have any
appeal to anyone?
JD
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| Re: IDL and 64bit Linux [message #40710 is a reply to message #40552] |
Wed, 01 September 2004 01:33 |
Nigel Wade
Messages: 286
Registered: March 1998
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Senior Member |
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On Thu, 19 Aug 2004 10:02:12 -0700, JD Smith wrote:
> On Thu, 19 Aug 2004 09:19:44 +0100, Nigel Wade wrote:
>
>> We are in the process of finding a replacement for our ageing Origin 2000
>> system. One absolute requirement is that it be able to run IDL.
>>
>> We are looking at SMP systems and 2 likely contenders are the Sun Fire
>> V40z (hopefully an 8 processor version will be available sometime) and the
>> sgi Altix 350. The Sun Fire uses Opteron and the Altix Itanium 2, neither
>> of which is supported by IDL.
>>
>> I've mailed RSInc to ask them if they are likely to include support for
>> either on Linux in the near future, but so far I've not received any reply
>> at all.
>>
>> So, I'm hoping that someone here might have tried IDL on one of these
>> platforms, to test the water, and can tell me whether it runs, and if so,
>> how well it performs against a 32bit processor (I'm concerned that the
>> Itanium has no native 32bit capability and may run IDL very slowly in
>> 32bit emulation, the Opteron is very much an unknown quantity).
>
> See:
>
> http://www.rsinc.com/services/techtip.asp?ttid=3635#current
>
> Relevant quote: "An announcement as to availability (post-IDL 6.1) [of
> 64-bit IDL for Linux] will be forthcoming following further
> investigation."
>
> I've heard lots of rumbling about getting a 64bit IDL for linux, which
> could address some rather large chunks of memory, and perform long64
> integer arithmetic at healthy speeds. Anyone have use for fast 64bit
> integer arithmetic? Do 64-bit doubles ("double doubles") have any
> appeal to anyone?
>
> JD
Sorry, I've been on holiday, so haven't had chance to keep up with this (I
really shouldn't post questions just before I go away).
I've read the official RSI position on Linux as stated on their web
site, and it's not clear where they intend to go at the moment. The gist
of the current position on 64bit Linux seems to be that "it's time to
start thinking about it", so not much hope for a quick solution.
I've had more positive feedback by private email that IDL should run OK on
the Itanium using the latest IA32EL at up to 85% of the CPU performance.
I've heard nothing about AMD64 platforms, though.
--
Nigel Wade, System Administrator, Space Plasma Physics Group,
University of Leicester, Leicester, LE1 7RH, UK
E-mail : nmw@ion.le.ac.uk
Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555
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| Re: IDL and 64bit Linux [message #40934 is a reply to message #40710] |
Tue, 07 September 2004 17:08 |
Rick Towler
Messages: 821
Registered: August 1998
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Senior Member |
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Nigel Wade wrote:
>> On Thu, 19 Aug 2004 09:19:44 +0100, Nigel Wade wrote:
>>
>>
>>> We are in the process of finding a replacement for our ageing Origin 2000
>>> system. One absolute requirement is that it be able to run IDL.
>>>
>>> We are looking at SMP systems and 2 likely contenders are the Sun Fire
>>> V40z (hopefully an 8 processor version will be available sometime) and the
>>> sgi Altix 350. The Sun Fire uses Opteron and the Altix Itanium 2, neither
>>> of which is supported by IDL.
> I've had more positive feedback by private email that IDL should run OK on
> the Itanium using the latest IA32EL at up to 85% of the CPU performance.
> I've heard nothing about AMD64 platforms, though.
Sheesh, I had a nice email typed out and a rare but o-so-fun BSOD wiped
it out...
The gist of it was that with the introduction of the 64bit
Prescotts/Xenons that I find it unlikely that the Itanium will find its
way onto enough desktops to justify native IA64 support for IDL. Since
AMD64 and iX86-64 are "broadly compatible" and WinXP 64 set for release
next year, I see the x86-64 market hitting the threshold for support far
sooner. So I would bet your 64 bits on the Opteron.
As for AMD64 compatibility, I run 32bit IDL on Athlon64 chips in 32bit
WinXP and 32bit Linux w/o issue. I see no reason why it wouldn't run on
64bit linux, just haven't gotten around to it.
And your 8 way SunFire should be out next year:
http://www.theinquirer.net/?article=18169
-Rick
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