Is this right?

Message boards : Number crunching : Is this right?
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Profile Chilean
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Message 125670 - Posted: 20 Jun 2005, 16:08:16 UTC

Ok, I have a Linux and a Windows PCs. I downloaded the optimized version for Linux from Ned Slider's page, and I also downloaded another optimized SETI Client for my Windows PCs.
My Linux box is a 1105MHz(around that can't remeber exactly the numbers)AMD Athlon. And it takes about 3:45mins. to finish a single WU.
My Windows is a 1.8GHz Athlon XP and it takes about 3:15mins.

Windows takes about 30minutes less than Linux even when it has 700MHz over my Linux.... How is this possible??

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Message 125673 - Posted: 20 Jun 2005, 16:14:49 UTC

I don't see what's wrong?????


Your faster machine is processing faster (3:15 versus 3:45) and will therefore crunch more units in a 24 hour period. And so will receive more credit than your slower box.
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Message 125708 - Posted: 20 Jun 2005, 19:12:47 UTC - in response to Message 125670.  

Windows takes about 30minutes less than Linux even when it has 700MHz over my Linux.... How is this possible??

Because your windows machine has 700MHz over your linux box...
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Message 125744 - Posted: 20 Jun 2005, 21:13:22 UTC

Not a very good example there :-/

And MHz/GHz processor speed is not a good way to
determine a good median between procs with different
architectures, caches, etc. But yea, basically a faster
CPU will generally crunch WU's faster...
It is a sad sad day when someone takes your spoon away from you...
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Message 125751 - Posted: 20 Jun 2005, 21:39:32 UTC

but the difference shuld be higgher, like 1 hour or so.
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Message 125759 - Posted: 20 Jun 2005, 21:50:47 UTC - in response to Message 125751.  

but the difference shuld be higgher, like 1 hour or so.


There are two many variables to say that.

The biggest of which is WU are not consistent in size. The data with-in them are not consistent either.


I'd rather speak my mind because it hurts too much to bite my tongue.

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Message 125764 - Posted: 20 Jun 2005, 21:58:10 UTC - in response to Message 125751.  

but the difference shuld be higgher, like 1 hour or so.

different latency memory, different MOBOs can also cause a difference.
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Message 125770 - Posted: 20 Jun 2005, 22:09:54 UTC
Last modified: 20 Jun 2005, 22:10:07 UTC

OS, would affect it right?
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Message 125780 - Posted: 20 Jun 2005, 22:19:10 UTC - in response to Message 125770.  

OS, would affect it right?


Yes... also CPU load, RAM speed, HD speed (in a lesser way, but hey..), if linux is running X-server or not... depends on lots of things.. also if both processors have similar instructions or not...


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Message boards : Number crunching : Is this right?


 
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