I have one machine running Ubuntu 64 bit with the 32 bit libraries added to enable CPDN tasks to run. I have another machine with Kubuntu 32 bit installed on it. This machine does have a 64 bit cpu. Will there be any difference in the speed between running tasks were I to put the 64 bit version of the os on it in either direction? Because of problems in the past, I would wait till a work free period before upgrading to 64 bit Kubuntu on the netbook.

I have one machine running Ubuntu 64 bit with the 32 bit libraries added to enable CPDN tasks to run. I have another machine with Kubuntu 32 bit installed on it. This machine does have a 64 bit cpu. Will there be any difference in the speed between running tasks were I to put the 64 bit version of the os on it in either direction? Because of problems in the past, I would wait till a work free period before upgrading to 64 bit Kubuntu on the netbook.

I don't think it would make any difference. I have a 64-bit CPU running 32-bit Linux and 5 BOINC projects plus a VirtualBox, also 32-bit. On it I have installed a Solaris 11 Virtual Machine, 64-bit, which runs 32-bit SETI@home and another Virtual Machine which is BOINC_VM by CERN. They all run fine.
Tullio

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I too don't think that there would be much, if any, difference in speed.

The programs use 80 bits of data where possible, and I've heard that there's not much difference in the FPU code between 32 and 64 bit processors. There's probably more difference between the FPU code used by Intel and AMD processor chips.

If you need faster processing, then you'll need a faster processor. Running at stock speed. :)

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If you need faster processing, then you'll need a faster processor. Running at stock speed.

There are not many processors that would be slower than the 1.6G dual core atom in the netbook and still run cpdn!

If possible you might try upgrading the RAM. RAM is cheep these days. If your netbook only has 2 GB�s upgrading to 4 can make a real noticeable difference.

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Ah, a netbook. Not much point it trying to improve things then. They're designed to be low power / economise on power drain.
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Backups: Here

If possible you might try upgrading the RAM. RAM is cheep these days. If your netbook only has 2 GB�s upgrading to 4 can make a real noticeable difference.

Unfortunately this one can only be upgraded to a max of 2GB which I did when it was running regional models. To be honest, there wasn't much difference going up from one to two. It only gets about 4-6 hours a week when there is anything else going on apart from crunching two tasks though. It will despite running almost 24/7 take considerably longer than the desktop which runs for about 1/4 of the time to finish it's full resolution ocean models!

I have a HP laptop running Linux with an APU E-450 CPU. I upgraded its RAM from 2 GB to 8 GB and also put in it a 128 GB SSD. Now it runs 3 BOINC projects 24/7.
Tullio

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