Titan compile » History » Version 4
Henrik Levämäki, 2016-07-11 12:54
| 1 | 1 | Henrik Levämäki | h1. Titan compile |
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| 2 | 2 | Henrik Levämäki | |
| 3 | The CPUs on Titan support so called AVX/AVX2 instructions (https://en.wikipedia.org/wiki/Advanced_Vector_Extensions), which make floating point-intensive calculations faster (depending on the code, ~2X speed boost vs. Pleione are possible). |
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| 5 | The following command can be used to access CPU information (make, model, supported instruction sets etc.): |
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| 7 | <pre> |
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| 8 | less /proc/cpuinfo |
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| 9 | </pre> |
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| 11 | With Intel compilers, one can therefore use the following compiler flag to take advantage of AVX2: |
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| 13 | <pre> |
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| 14 | 4 | Henrik Levämäki | -xCORE-AVX2 (using -xHost should also enable AVX2) |
| 15 | 2 | Henrik Levämäki | </pre> |