How to run stockfish with hugepages under linux

[BeyondCritics]

You can run stockfish and most other applications under linux with hugetables, even if they are not programmed for this.
Under Ubuntu: First install the packet "hugepages":

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sudo apt-get install hugepages

Next run stockfish like that:

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hugectl --heap stockfish

This should work also:

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LD_PRELOAD=libhugetlbfs.so HUGETLB_MORECORE=thp stockfish

I have written myself a small shell script, so that i can test this from any gui:

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! /bin/sh
#export LD_PRELOAD=libhugetlbfs.so HUGETLB_MORECORE=thp
#exec stockfish "$@"
hugectl --heap stockfish "$@"

For stockfish with a very large hash table this really makes a very noticeable difference in nps.

This works by intercepting the dynamic calls to malloc, therefore it should work for any engine.