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Old 2010-12-11, 03:40   #10
mdettweiler
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Quote:
Originally Posted by Mini-Geek View Post
Hmm...in stage 2 you might get a big slow-down due to memory bandwidth. But then LL needs fast bandwidth too, just not as much storage, so it might be a non-issue. Plus, there's the fact that if you have X MB of RAM for Prime95, each worker can only get between X and X/4 MB of RAM, (closer to X/4 than X, usually) so the P-1 tests aren't as efficient as they could be. If you want to do it, and you first test it out to see how it works out, (like you're doing now - I just mean don't leave it on that 24/7 without seeing whether it works well or not) there's nothing wrong with doing P-1 on all four workers, but it's simplest to just put one worker on P-1 and the rest on other tasks.
Note that you can also set MaxHighMemWorkers=1 in prime.txt to ensure that only one worker runs stage 2 at any given time. (If two workers need to run stage 2, the second one will put its stage 2 on hold and move on to stage 1 of the next assignment until the first worker's stage 2 finishes.) With this, you can "safely" run all four cores on P-1.
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