3
Your architectural defaults do not include defaults for the
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Level 1 BLAS. ATLAS now has the ability to tune the Level 1 BLAS to
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your machine. However, this will add time to the install. If your
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algorithm utilizes the Level 2 or Level 3 BLAS to any degree, the
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the Level 1 BLAS will usually be a low order term, and thus only matter
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for small problems. Therefore, if you don't think you need good performance
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from the Level 1 BLAS, you can answer "no" to the question below, and ATLAS
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will skip the Level 1 tuning. ATLAS will still provide Level 1 BLAS, but
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their performance may be much worse than if tuning were allowed.