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From: Richard Purdie <richard.purdie@linuxfoundation.org>
To: Gary Thomas <gary@mlbassoc.com>
Date: Wed, 22 Aug 2012 14:48:04 +0100
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Cc: Poky Project <poky@yoctoproject.org>
Subject: Re: knotty2
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On Tue, 2012-08-21 at 08:10 -0600, Gary Thomas wrote:
> I just updated to master:6ed4012fefee1294d98f2ea76163d44acf3d045
> The new "knotty2" interface is very impressive and a welcome improvement
> from the old CLI :-)
> 
> One thing I noticed though - during much of the first phase(*) of a
> new build (where it's building the early native packages), I only
> get one task running at a time even though I've set BB_NUMBER_THREADS ?= "4"
> What needs to be so serialized?
> 
> Once it gets past this phase and into building the main recipes,
> it goes back to running more than one task at a time.
> 
> (*) Do these various build phases have names?  Is this documented?

This is probably the bit where its building pseudo-native. It
effectively does:

bitbake pseudo-native
bitbake <original target>

so the pseudo-native bit is not very parallel. Its the lesser of several
evils. I have ideas to improve this but they're invasive, complex and
I'm not finding the time to look at that :(

Cheers,

Richard