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Multicore doesn't mean equal core - Implications for F@H

post #1 of 3
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http://www.overclock.net/hardware-ne...ean-equal.html

I'm posting a link to this news article because it suggests ways in which Gromacs (among other things) can be optimized which may lead to future F@H clients (especially SMP) running faster and more efficiently.
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post #2 of 3
With my quad, I havn't seen any differences with dual Linux VMs. Back in April and May when I was just running SMP, I remember the points being exactly the same when checking it in the morning after not touching the pc for hours.
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post #3 of 3
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Quote:
Originally Posted by mortimersnerd View Post
With my quad, I havn't seen any differences with dual Linux VMs. Back in April and May when I was just running SMP, I remember the points being exactly the same when checking it in the morning after not touching the pc for hours.
Running two clients on your quad core just works around the problem. Everybody's familiar with the problem, the SMP client doesn't use anywhere near all the CPU. Even running two of them uses no more than 90-95% of the CPU. The problem, as these guys identified, is MPI (MPICH), combined with the way the OS schedules processes onto CPU cores. I'm looking forward to trying out their alternative, if Stanford ever offers it.
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