pstree will be attached
Created attachment 572052 [details] load.28.20190406-090302
I have just recompiled samba-4.10.1 with MAKEOPTS="-j1" and at no time the package utilized more than one CPU(-core) during compilation...
FWIW it was during install phase: python3.6,29339 /var/tmp/portage/net-fs/samba-4.10.1/work/samba-4.10.1/buildtools/bin/waf --destdir=/var/tmp/portage/net-fs/samba-4.10.1/image/ install ... ebuild.sh─┬─tee │ └─python3.6─┬─13*[{python3.6}] │ ├─5*[python3.6───x86_64-pc-linux─┬─cc1] │ │ └─as] │ └─7*[python3.6───x86_64-pc-linux───collect2───ld]
Created attachment 572106 [details] load.23.20190406-132247 different image, same issue
Especially during install phase there're a lot of parallel python processes