http://cms.mpi.univie.ac.at/vasp/vasp/node44.html
on ALPHA-LINUX the two options
export MALLOC_MMAP_MAX_=0
export MALLOC_TRIM_THRESHOLD_=-1
improve the performance by 10-20%!! NOTE: sometimes, the tables show very different timings for similar machines with similar clock rates. This is often related to an upgrade of the compiler or of the motherboard.
ALPHA?
追記:
kosakiさん
このオプションが効果が大きいのがHPC分野で、alphaはそれ系で使われることが多いってだけ。
サーバー系の使い方で、こいつをONにするのはちょい疑問
ほほー
