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World Community Grid Forums
Category: Completed Research
Forum: The Clean Energy Project - Phase 2 Forum
Thread: Any benefit upgrading to 64 bit O/S for CEP2? |
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Thread Status: Active Total posts in this thread: 2
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AgrFan
Senior Cruncher USA Joined: Apr 17, 2008 Post Count: 396 Status: Recently Active Project Badges: 
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I recently started crunching CEP2 on a AMD Athlon II x4 640 (stock clock) with 4gb RAM under 32-bit Ubuntu 10.04.
----------------------------------------I am seeing 9-10 hour runtimes with no restrictions (4 tasks). Will CEP2 run quicker with a 64-bit operating system? This machine has a 20GB Western Digital IDE hard drive. It's not thrashing too badly. Will a SATA hard drive speed things up? I have a Intel E5200 (WinXP 32-bit) completing units in 9 hours also. I expected the Athlon to be quicker since it's running 20% faster. What kind of runtimes should I be expecting?
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uplinger
Former World Community Grid Tech Joined: May 23, 2005 Post Count: 3952 Status: Offline Project Badges: 
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Runtimes vary depending on machine, speed of the ram, amount of cache on the processors...and many other factors. I don't think you'll see a big improvement from running on a 64 bit system. One reason to move to 64 bit would be the fact that on 3GBytes of RAM are being noticed on your due to 32 bit processing.
Since you are running linux on one machine, I would recommend that you install the pae kernel on it as it'll allow for up to 16GBytes of RAM to be recognized. This will keep the chances of your machine requiring to use swap less. It also allows you the compatibility of 32 bit applications on your linux machine. To see what your memory usage is on linux, use this command in the terminal. 'top'...(note to exit press the 'q' button) Mem: 4056032k total, 1517240k used, 2538792k free, 286636k buffers You should see something like that towards the top of the terminal. You can see from my example that my machine still has 2.5GB of memory available for use. Using Swap space slows things down. Hope that helps, -Uplinger |
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