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On 11/29/2010 02:59 AM, Peter Humphrey wrote: |
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>[...] |
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> Once the other jobs had finished and only open office was compiling, |
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> response was much faster, even when it got to a threaded section and was |
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> using all four cores. |
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One thing I forgot to mention is that with the ck kernel, the number of |
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threads (like the -j option of make) must be exactly equal to the amount |
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of CPUs or cores, and *not* the usual cores+1. So on a dual-core, -j2 |
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is best, not -j3, and on a quad -j4, not -j5, due to the BFS scheduler |
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not needing "+1" threads to fully utilize the CPU. That means you get |
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less overhead as a bonus (the more threads you use, the more overhead |
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you get, making things slower.) |
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