Bug#704046: yade: Please enable parallel build, with a different safe-guard ; -)

[Dmitrijs Ledkovs]

Source: yade
Version: Please enable parallel build, with a different safe-guard ;-)
Severity: wishlist

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I build yade in 26minutes [1], fully in tmpfs and I didn't go into
swap death.

I was building it with 8 parallel jobs enabled, but well I do have
enough RAM to support that. By the looks of things it didn't use up
more than 1.8GB per cmake job and did not go >>14GB in peak RAM usage.

I'd offer to perform the following:
* check amount of free ram in GB
* set --parallel setting to 1 or floor((free ram in GB)/2) whichever
  is bigger

This will both "safe-guard" unsuspecting low-ram machines, yet still
allow unlimited parallel jobs for those who have unlimitted RAM =)

[1] http://people.canonical.com/~xnox/boost1.53/yade_0.90.3-1~exp1ubuntu1_amd64-20130327-0049.build

Regards,

Dmitrijs.

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