[OE-core] for a quad-core machine, shouldn't parallelism be set to 8?

[Martin Jansa]

On Wed, Jan 09, 2013 at 09:26:10AM -0500, Robert P. J. Day wrote:
> On Wed, 9 Jan 2013, Elvis Dowson wrote:
> 
> > Hi Robert,
> 
> > On my i7 quad core machine, I've set both values to 6. Setting it to
> > 6 appears to be nearly the same as setting it to 8, I dare say a
> > marginally faster by a minute. I can build core image console in
> > around 22 minutes.
> >
> > Elvis
> 
>   i recall someone (richard purdie?) once benchmarked to check the
> benefits of increasing parallelism and while it's obvious you'll hit
> the wall eventually, it would still be nice for the documentation to
> be consistent.

You can use openembedded-core/scripts/contrib/bb-perf/bb-matrix.sh to
find best value for your HW and bitbake target.

Cheers,

-- 
Martin 'JaMa' Jansa     jabber: Martin.Jansa at gmail.com
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