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Xeon Performance Question

 
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Elwood
Knight
Knight


Joined: 21 Feb 2006
Posts: 84
Location: West Virginia, USA

PostPosted: Mon Feb 27, 2006 8:38 pm    Post subject: Xeon Performance Question Reply with quote

I'm curious about something. I have a 2.4GHz Xeon in a server running SETI as a and it seems to be a bit disappointing in its output. It averages around 160 cobblestones a day, with a measured floating point average of 1034.65M opps/sec. By contrast, My Pentium M 1.4 notebook measures 1231.62. Is the Xeon really that much slower in the floating point department?

Thanks,

-Elwood
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ToeBee
KWSN Castellan
KWSN Castellan


Joined: 30 Jun 2004
Posts: 601
Location: Manhattan, KS

PostPosted: Tue Feb 28, 2006 2:42 am    Post subject: Reply with quote

The pentium-M chips really fly on seti. A lot of it is the 1 MB of L2 cache which seti benefits from a lot. How much cache does the xeon have? Also, the Pentium-M's design is based on the P3 which was a MUCH better chip than the P4 will ever be on a performance/clock cycle basis. Also keep in mind that the benchmarks are really pretty sucky. They get inflated by the L2 cache. Let them both run for a week and compare actual production. I am guessing they will end up pretty close with the Xeon possibly pulling ahead a little.
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Elwood
Knight
Knight


Joined: 21 Feb 2006
Posts: 84
Location: West Virginia, USA

PostPosted: Tue Feb 28, 2006 9:09 am    Post subject: Reply with quote

I don't remember for sure, but I believe this particular XEON is has the 512kb cache, rather than the one or two MB's some models have. It seems to be more or less dead even with the Pentium M in terms of Cobblestones/time of operation (laptop isn't always on and they run different projects.) It just caught me a little off guard. I expected closer to 250 cobblestones a day out of Xeon. Oh well.

Edit: I think I'll put an optimized app on the server tomorrow and see if it helps.
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