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Re: Poor comparable performance for IDL on Solaris vs Vista or Snow Leopard [message #69952 is a reply to message #69931]

Mon, 22 February 2010 09:36

liamgumley
Messages: 74
Registered: June 2005

Member

On Feb 22, 11:15 am, demian <demian.ha...@gmail.com> wrote:
> Both servers are largely quiet and have most cycles available for user
> processing. One server has 4 ~1GHz processors, 32GB of RAM and runs
> Solaris 8. The other server has 4, 8core ~1GHz processors, 64GB of RAM
> and runs Solaris 10. We’ve tested to see if there is a performance
> difference between local vs SAN storage on these servers and cannot
> explain the difference.

If the Sun servers have T1 processors, then slow IDL performance
should be expected, since a single floating point unit (FPU) is shared
by all processor cores:

http://en.wikipedia.org/wiki/UltraSPARC_T1#Target_market

I would not expect a Sun server based on 1GHz CPUs to be as fast as a
3GHz Mac. Is multi-threading enabled on the Sun servers? Even if it
is, the FPU issue will severely hamper performance if they are indeed
T1 servers.

Cheers,
Liam.
Practical IDL Programming
http://www.gumley.com/

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		Re: Poor comparable performance for IDL on Solaris vs Vista or Snow Leopard By: demian on Tue, 23 February 2010 13:37
		Re: Poor comparable performance for IDL on Solaris vs Vista or Snow Leopard By: liamgumley on Mon, 22 February 2010 09:36

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