Yocto (Dunfell): Very slow Bitbake compilation / build

Technical Support
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1

Hi team,

I’m compiling the latest monthly devel and I’m surprised how slow it is going. Compared to BSP 2 or 3, it is several times the compilation.

We know Yocto is slow but… Qt is taking more than one hour (and stuck in a do_package) with the CPU load close to cero.

Please check this screenshot:

2454-2020-12-15-16-58.png
2454-2020-12-15-16-58.png1893×2160 705 KB

My commands where:

repo init -b refs/tags/5.1.0-devel-202012 -m tdxref/default.xml
repo sync

(Chose my MACHINE in local.conf)

. export
bitbake tdx-reference-multimedia-image

I’ve tried the following in local.conf but it doesn’t improve the situation.

BB_NUMBER_THREADS ?= "32"
BB_NUMBER_PARSE_THREADS ?= "64"
PARALLEL_MAKE ?= "-j32"
PARALLEL_MAKEINST ?= "-j32"

Is this normal? Thanks

2

It seems that the Qt related packages take a lot of time. So unless you really want to use Graphical interface, try to use the tdx-reference-minimal-image or remove all the Qt packages from the image recipe (More info: Build a Reference Image with Yocto Project/OpenEmbedded | Toradex Developer Center)

Also, I found that leaving the default config worked better than trying to add my own changes so I removed my added changes:

 BB_NUMBER_THREADS
 BB_NUMBER_PARSE_THREADS
 PARALLEL_MAKE 
 PARALLEL_MAKEINST

and let Bitbake do its thing.