during compilation the number of threads of the build machine is hardcoded into
the code:
gcc ... -DMAX_CPU_NUMBER=4
apparently the ubuntu build machine had two cores
with these type of libraries it is always better to build them on the machine
your are using them one so you get the optimal performance.
binary packages can only provided the lowest common denominator.
** Changed in: openblas (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/817212
Title:
Number of threads stuck on two
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