It's too bad make(1) can't have a "max parallel jobs" for a particular directory.

I believe that some of the llvm build winds up using nearly a gig of RAM per compiled .c file, so when you are running 2 jobs at once, LLVM will swap like mad.

If we could add something under the llvm directory "max jobs = RAM/1GB" we could have much faster build worlds.


On 5/30/16 7:43 AM, Kurt Jaeger wrote:

Yesterday I pulled via svn co ... a fresh r300951 and started the
buildworld as

# make -j2 buildworld

it ended today at lunchtime after 18 hours. The laptop has
2x Intel Atom 1.6GHz and 1 GByte RAM and was otherwise unused.
Is this the normal buildworld time of today?
Yes, this sounds in line with similar setups.

I think it spent most of the time in building the llvm...
Yes, llvm is a real hog.

That's why I normally build on amd64 boxes...

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