Titan compile¶

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).

The following command can be used to access CPU information (make, model, supported instruction sets etc.):

less /proc/cpuinfo

With Intel compilers, one can therefore use the following compiler flag to take advantage of AVX2:

-xCORE-AVX2 (using -xHost should also enable AVX2)