shyouhei / ruby-lang.org wrote:
> Hmm.  Thank you.  Now I am very faintly negative because
> MALLOC_ARENA_MAX=2 ruby ...
> is much easier than
> MALLOC_ARENA_MAX=$((`ls -1 /sys/bus/cpu/devices/|wc -l`*8)) ruby...

nproc(1) command in GNU coreutils is handy :)

	MALLOC_ARENA_MAX=$(( $(nproc) * 8 )) ruby...

Fwiw, a goal of glibc developers is to limit MALLOC_ARENA_MAX
to nproc.  It should happen when restartable sequences are
available, but maybe it can happen for older kernels, too.

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